JP5697272B2 - Magnetic head for perpendicular magnetic recording with main pole and shield - Google Patents

Description

  The present invention relates to a magnetic head for perpendicular magnetic recording used for recording information on a recording medium by a perpendicular magnetic recording system, and more particularly to a magnetic head for perpendicular magnetic recording provided with a main magnetic pole and a shield.

  The recording method in the magnetic recording / reproducing apparatus includes a longitudinal magnetic recording method in which the direction of signal magnetization is the in-plane direction (longitudinal direction) of the recording medium, and a direction of signal magnetization in a direction perpendicular to the surface of the recording medium. There is a perpendicular magnetic recording system. It is said that the perpendicular magnetic recording system is less susceptible to thermal fluctuations of the recording medium than the longitudinal magnetic recording system and can achieve a high linear recording density.

  In general, as a magnetic head for perpendicular magnetic recording, like a longitudinal magnetic recording magnetic head, a reproducing head portion having a read magnetoresistive element (hereinafter also referred to as MR (Magnetoresistive) element) and A recording head having a writing inductive electromagnetic transducer for writing is laminated on the upper surface of the substrate. The recording head unit includes a main magnetic pole that generates a recording magnetic field in a direction perpendicular to the surface of the recording medium. The main pole is connected to, for example, a track width defining portion disposed on the medium facing surface facing one end of the recording medium, and the other end of the track width defining portion, and has a larger width than the track width defining portion. And a wide portion. The track width defining portion has a substantially constant width. A perpendicular magnetic recording type recording head portion is required to reduce the track width and improve the recording characteristics, for example, the overwriting characteristics representing overwriting performance, in order to increase the recording density.

  Incidentally, a magnetic head used in a magnetic disk device such as a hard disk device is generally provided on a slider. The slider has the medium facing surface. The medium facing surface has an air inflow end (leading end) and an air outflow end (trailing end). Then, the slider slightly floats from the surface of the recording medium by the air flow flowing between the medium facing surface and the recording medium from the air inflow end.

  Here, the position closer to the leading end with respect to the reference position is defined as the leading side, and the position closer to the trailing end with respect to the reference position is defined as the trailing side. The leading side is the rear side in the traveling direction of the recording medium with respect to the slider. The trailing side is the front side in the traveling direction of the recording medium with respect to the slider.

  In the slider, the magnetic head is generally disposed in the vicinity of the trailing end on the medium facing surface. In the magnetic disk device, the magnetic head is positioned by, for example, a rotary actuator. In this case, the magnetic head moves on the recording medium along a circular orbit centered on the rotation center of the rotary actuator. In such a magnetic disk device, the inclination of the magnetic head with respect to the tangent of the circular track, called skew, occurs according to the position of the magnetic head in the track crossing direction.

  In particular, in the perpendicular magnetic recording type magnetic disk apparatus having a higher writing ability to the recording medium than the longitudinal magnetic recording method, when the above-mentioned skew occurs, it is adjacent to the track to be recorded when recording a signal to a certain track. There may be a phenomenon that a signal recorded on one or more tracks is erased or attenuated (hereinafter referred to as adjacent track erasure). In order to increase the recording density, it is necessary to suppress the occurrence of adjacent track erasure.

  As a technique for suppressing the occurrence of adjacent track erasure due to the skew as described above and improving the recording density, a technique of providing a recording shield in the vicinity of the main magnetic pole is effective. For example, Patent Documents 1 and 2 disclose a magnetic head including a recording shield having an end face arranged so as to surround the end face of the main pole on the medium facing surface.

  In general, a magnetic head having a write shield is provided with one or more return path sections that connect the write shield to a portion of the main pole away from the medium facing surface. The one or more return path sections form one or more spaces between the main magnetic poles. A coil is provided so as to pass through the one or more spaces. The recording shield and at least one return path section take in a magnetic flux that is generated from the end face of the main pole and spreads in a direction other than the direction perpendicular to the surface of the recording medium, and prevents the magnetic flux from reaching the recording medium. It has a function. The write shield and the one or more return path sections also have a function of returning the magnetic flux generated from the end face of the main pole and magnetizing the recording medium to the main pole. According to the magnetic head provided with the recording shield, it is possible to suppress the occurrence of adjacent track erasure and to further improve the recording density.

  In Patent Documents 1 and 2, as the one or more return path sections, a return path section disposed on the trailing side of the main pole and a return path section disposed on the leading side of the main pole are provided. A magnetic head provided is described.

US Pat. No. 6,954,340B2 JP 2005-182987 A

  By the way, the position of the end portion of the recording bit recorded on the recording medium is determined by the position of the end portion on the trailing side among the end surfaces of the main pole disposed on the medium facing surface. Therefore, in order to accurately define the position of the end portion of the recording bit, it is effective that the end surface of the recording shield includes an end surface portion disposed on the trailing side of the end surface of the main pole.

  Further, when the frequency of the recording signal is increased in order to increase the recording density, the magnetic head is required to improve the speed of change in the direction of the magnetic flux generated from the end face of the main magnetic pole. In a magnetic head having a recording shield, in order to meet this requirement, as described above, the end surface of the recording shield includes the end surface portion disposed on the trailing side of the end surface of the main pole, It is effective to provide a return path section disposed on the trailing side and shorten the length of the return path section. For this purpose, it is effective to reduce the number of turns of the coil passing through the space formed between the main pole and the return path section. However, in this case, the magnetomotive force by the coil is insufficient, and there is a possibility that a sufficiently large recording magnetic field cannot be generated from the main magnetic pole.

  Thus, conventionally, a magnetic path that is disposed on the front side (trailing side) of the recording medium in the advancing direction with respect to the main magnetic pole and connects the portion of the main magnetic pole away from the medium facing surface and the recording shield. It was difficult to generate a sufficiently large recording magnetic field from the main magnetic pole while shortening the length of the magnetic pole.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a recording shield and a portion of the main pole that is disposed on the front side in the traveling direction of the recording medium, away from the medium facing surface. It is an object of the present invention to provide a magnetic head for perpendicular magnetic recording in which a sufficiently large recording magnetic field can be generated from a main pole while shortening the length of a magnetic path connecting the two.

  A magnetic head for perpendicular magnetic recording according to the present invention includes a medium facing surface facing a recording medium, first and second coils, a main pole, a recording shield made of a magnetic material, and a gap portion made of a nonmagnetic material. And first and second yoke layers made of a magnetic material and magnetically connected to the recording shield, and first and second coupling portions. The first and second coils generate a magnetic field corresponding to information recorded on the recording medium. The main magnetic pole has an end face disposed on the medium facing surface, passes a magnetic flux corresponding to the magnetic field generated by the first and second coils, and records information on the recording medium by a perpendicular magnetic recording method. The recording magnetic field is generated. The recording shield has an end face disposed on the medium facing surface. The gap portion is disposed between the main magnetic pole and the recording shield.

  The first yoke layer is disposed behind the main magnetic pole in the direction of travel of the recording medium. The second yoke layer is disposed on the front side in the traveling direction of the recording medium with respect to the main pole. The first connecting portion is disposed at a position away from the medium facing surface, and magnetically connects the main magnetic pole and the second yoke layer. The second coupling portion is disposed at a position away from the medium facing surface, and magnetically couples the first yoke layer and the second yoke layer without contacting the main magnetic pole.

  The end face of the recording shield includes a first end face portion disposed on the front side in the traveling direction of the recording medium with respect to the end face of the main pole. The first coil is wound around the first connecting portion, and a part of the first coil passes between the first connecting portion and the second connecting portion. The second coil is wound around the second coupling portion.

  In the magnetic head for perpendicular magnetic recording according to the present invention, the second connecting portion may be disposed at a position farther from the medium facing surface than the first connecting portion.

  In the magnetic head for perpendicular magnetic recording of the present invention, the second coil may be arranged on the rear side in the traveling direction of the recording medium with respect to the main magnetic pole, or the recording medium travels with respect to the main magnetic pole. It may be arranged on the front side in the direction. Further, assuming a virtual plane that intersects with the end face of the main pole disposed on the medium facing surface and is perpendicular to the traveling direction of the recording medium, at least a part of the second coil intersects with the virtual plane. May be arranged.

  In the magnetic head for perpendicular magnetic recording of the present invention, the number of turns of the second coil may be greater than or equal to the number of turns of the first coil, or may be greater than the number of turns of the first coil. .

  In the magnetic head for perpendicular magnetic recording of the present invention, the end face of the recording shield may further include second, third and fourth end face portions. The second end surface portion is disposed on the rear side in the traveling direction of the recording medium with respect to the end surface of the main pole. The third and fourth end face portions are arranged on both sides in the track width direction with respect to the end face of the main pole.

  The magnetic head for perpendicular magnetic recording of the present invention may further include a third coil that generates a magnetic field according to information recorded on the recording medium. In this case, the main pole passes a magnetic flux corresponding to the magnetic field generated by the first, second and third coils. The third coil is wound around the second coupling portion. The second and third coils are arranged at different positions in the traveling direction of the recording medium.

  When the magnetic head for perpendicular magnetic recording of the present invention includes the third coil, the second coil may be disposed on the rear side in the traveling direction of the recording medium with respect to the main pole. In this case, the third coil may be arranged on the front side in the traveling direction of the recording medium with respect to the main magnetic pole. Alternatively, assuming a virtual plane that intersects with the end surface of the main pole disposed on the medium facing surface and is perpendicular to the traveling direction of the recording medium, at least a part of the third coil intersects with the virtual plane. May be arranged.

  Further, the number of turns of the second coil and the number of turns of the third coil may be equal to or greater than the number of turns of the first coil. Alternatively, the number of turns of the second coil may be greater than the number of turns of the first coil, and the number of turns of the third coil may be greater than or equal to the number of turns of the first coil.

  In the magnetic head for perpendicular magnetic recording of the present invention, the first and second magnetic paths from the recording shield to the main pole are formed. The first magnetic path passes through the second yoke layer and the first coupling portion. The first magnetic path is disposed on the front side in the direction of travel of the recording medium with respect to the main magnetic pole, and connects a portion of the main magnetic pole away from the medium facing surface and the recording shield. The second magnetic path passes through the first yoke layer, the second coupling portion, the second yoke layer, and the first coupling portion. The first coil is wound around the first connecting portion, and a part of the first coil passes between the first connecting portion and the second connecting portion. The second coil is wound around the second coupling portion. As a result, even if the number of turns of the first coil is reduced and the length of the first magnetic path is shortened, the first magnetic coil and the second coil have sufficient magnetomotive force from the main magnetic pole. A recording magnetic field having a magnitude can be generated. As described above, according to the present invention, a sufficiently large recording magnetic field is generated from the main pole while shortening the length of the first magnetic path disposed on the front side in the traveling direction of the recording medium with respect to the main pole. There is an effect that it can be generated.

1 is a cross-sectional view showing a magnetic head according to a first embodiment of the invention. FIG. 3 is a front view showing a medium facing surface of the magnetic head according to the first embodiment of the invention. It is a top view which shows the 2nd coil in the magnetic head based on the 1st Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 1st Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 2nd Embodiment of this invention. It is a top view which shows the 1st layer of the 1st coil in the magnetic head based on the 2nd Embodiment of this invention. It is a top view which shows the 2nd layer of the 1st coil in the magnetic head based on the 2nd Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 3rd Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 3rd Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 3rd Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 4th Embodiment of this invention. It is a top view which shows the 1st and 2nd coil in the magnetic head based on the 4th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 5th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 5th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 6th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 6th Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 6th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 7th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 8th Embodiment of this invention. It is a top view which shows the 1st layer of the 1st coil and the 1st layer of the 2nd coil in the magnetic head concerning an 8th embodiment of the present invention. It is a top view showing the 2nd layer of the 1st coil and the 2nd layer of the 2nd coil in the magnetic head concerning an 8th embodiment of the present invention. It is sectional drawing which shows the magnetic head based on the 9th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 9th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 10th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 10th Embodiment of this invention. It is a top view which shows the 1st and 3rd coil in the magnetic head based on the 10th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 11th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 11th Embodiment of this invention. It is a top view which shows the 3rd coil in the magnetic head based on the 11th Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 11th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 12th Embodiment of this invention. It is a top view which shows the 3rd coil in the magnetic head based on the 12th Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 12th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 13th Embodiment of this invention. It is sectional drawing which shows the magnetic head based on the 14th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 14th Embodiment of this invention. It is a top view which shows the 1st layer of the 1st coil and the 1st layer of the 3rd coil in the magnetic head concerning a 14th embodiment of the present invention. It is a top view which shows the 2nd layer of the 1st coil and the 2nd layer of the 3rd coil in the magnetic head concerning a 14th embodiment of the present invention. It is sectional drawing which shows the magnetic head based on the 15th Embodiment of this invention. It is a top view which shows the 2nd coil in the magnetic head based on the 15th Embodiment of this invention. It is a top view which shows the 3rd coil in the magnetic head based on the 15th Embodiment of this invention. It is a top view which shows the 1st coil in the magnetic head based on the 15th Embodiment of this invention.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration of the magnetic head according to the first embodiment of the invention will be described with reference to FIGS. FIG. 1 is a sectional view showing a magnetic head according to the present embodiment. An arrow indicated by a symbol T in FIG. 1 represents the traveling direction of the recording medium. FIG. 2 is a front view showing the medium facing surface of the magnetic head according to the present embodiment. FIG. 3 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 4 is a plan view showing the first coil in the magnetic head according to the present embodiment. An arrow indicated by a symbol TW in FIGS. 2 to 4 represents the track width direction.

As shown in FIGS. 1 and 2, the magnetic head for perpendicular magnetic recording according to the present embodiment (hereinafter simply referred to as a magnetic head) is made of aluminum oxide, titanium carbide (Al ₂ O ₃ .TiC), or the like. A substrate 1 made of a ceramic material and having an upper surface 1 a, an insulating layer 2 made of an insulating material such as alumina (Al ₂ O ₃ ) disposed on the upper surface 1 a of the substrate 1, and disposed on the insulating layer 2 A first read shield layer 3 made of the magnetic material formed, a first read shield gap film 4 which is an insulating film disposed so as to cover the first read shield layer 3, and the first read shield gap. An MR (magnetoresistive effect) element 5 as a reproducing element disposed on the film 4, a second reproducing shield gap film 6 which is an insulating film disposed on the MR element 5, and the second Play sea And a second read shield layer 7 made of a magnetic material and disposed on the-gap layer 6.

  One end of the MR element 5 is disposed on a medium facing surface 80 that faces the recording medium. As the MR element 5, an element using a magnetosensitive film exhibiting a magnetoresistance effect such as an AMR (anisotropic magnetoresistance effect) element, a GMR (giant magnetoresistance effect) element, or a TMR (tunnel magnetoresistance effect) element is used. be able to. The GMR element may be a CIP (Current In Plane) type in which a current for detecting a magnetic signal flows in a direction substantially parallel to the surface of each layer constituting the GMR element, or a current for detecting a magnetic signal may be used. A CPP (Current Perpendicular to Plane) type that flows in a direction substantially perpendicular to the surface of each layer constituting the GMR element may be used.

  A portion from the first reproduction shield layer 3 to the second reproduction shield layer 7 constitutes a reproduction head portion 8. The magnetic head is further disposed on the upper surface 1a of the substrate 1 around the reproducing head portion 8 and the insulating layer 71, and the insulating layer 71 made of an insulating material disposed on the second reproducing shield layer 7. And an insulating layer 72 made of an insulating material. The insulating layers 71 and 72 are made of alumina, for example. The upper surfaces of the insulating layers 71 and 72 are flattened.

  The magnetic head further includes a recording head unit 9 disposed on the insulating layers 71 and 72. The recording head unit 9 includes a first coil 21, a second coil 11, lead layers 10 and 20, a main magnetic pole 15, a recording shield 16, a gap unit 17, a first yoke layer 30, And a second yoke layer 40. The first coil 21, the second coil 11, and the lead layers 10 and 20 are all made of a conductive material such as copper. The first coil 21 and the second coil 11 are connected in series or in parallel. The main magnetic pole 15 has an end face disposed on the medium facing surface 80, passes a magnetic flux corresponding to the magnetic field generated by the first coil 21 and the second coil 11, and transmits information by a perpendicular magnetic recording method. A recording magnetic field for recording on the recording medium is generated. FIG. 1 shows a cross section (hereinafter referred to as a main cross section) perpendicular to the medium facing surface 80 and the upper surface 1 a of the substrate 1, which intersects with the end face of the main pole 15 disposed on the medium facing surface 80. The lead layers 10 and 20 are used to energize the first coil 21 and the second coil 11.

  The recording shield 16 has an end surface disposed on the medium facing surface 80. The end surface of the recording shield 16 includes first to fourth end surface portions 16Aa, 16Ba, 16Ca, and 16Da. The first end face portion 16 </ b> Aa is disposed on the front side in the traveling direction T of the recording medium with respect to the end face of the main pole 15. The second end face portion 16Ba is disposed behind the end face of the main pole 15 in the traveling direction T of the recording medium. The third and fourth end face portions 16Ca and 16Da are disposed on both sides of the end face of the main pole 15 in the track width direction TW. In the medium facing surface 80, the first to fourth end surface portions 16 </ b> Aa, 16 </ b> Ba, 16 </ b> Ca, and 16 </ b> Da are disposed so as to surround the end surface of the main pole 15.

  The recording shield 16 is made of a magnetic material. As the material of the write shield 16, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used.

  Both the first yoke layer 30 and the second yoke layer 40 are magnetically connected to the recording shield 16. The first yoke layer 30 is disposed behind the main magnetic pole 15 in the traveling direction T of the recording medium. The second yoke layer 40 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. The first and second yoke layers 30 and 40 are each formed of a magnetic material. As a material of the first and second yoke layers 30 and 40, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used.

  The recording head unit 9 further includes a first connecting part 41 and a second connecting part 31. The first connecting portion 41 is disposed at a position away from the medium facing surface 80 and magnetically connects the main magnetic pole 15 and the second yoke layer 40. The second connecting portion 31 is disposed at a position away from the medium facing surface 80 and magnetically connects the first yoke layer 30 and the second yoke layer 40 without contacting the main magnetic pole 15. In the example illustrated in FIG. 1, the second connecting portion 31 is disposed at a position farther from the medium facing surface 80 than the first connecting portion 41.

  The 1st connection part 41 and the 2nd connection part 31 are each formed with the magnetic material. As a material of the first connecting portion 41 and the second connecting portion 31, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used. The first coupling part 41 is constituted by one magnetic layer 42. The second coupling part 31 includes magnetic layers 32, 33, 34, 35 and 36.

  The recording head unit 9 further includes magnetic layers 38 and 39 made of a magnetic material that magnetically couples the first yoke layer 30 and the recording shield 16. As a material of the magnetic layers 38 and 39, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used.

  The first yoke layer 30 is disposed on the insulating layer 71. The magnetic layers 32 and 38 are both disposed on the first yoke layer 30. The magnetic layer 38 is disposed in the vicinity of the medium facing surface 80. The magnetic layer 32 is disposed at a position farther from the medium facing surface 80 than the magnetic layer 38. Each of the first yoke layer 30 and the magnetic layer 38 has end faces facing the medium facing surface 80, and these end faces are arranged at positions away from the medium facing surface 80. The second coil 11 is wound around the second coupling portion 31 (magnetic layer 32). The lead layer 10 is continuous with the second coil 11. In FIG. 3, the boundary between the second coil 11 and the lead layer 10 is indicated by a dotted line.

  The magnetic head further includes an insulating layer 51 made of an insulating material disposed on the insulating layers 71 and 72 around the first yoke layer 30, and the first yoke layer 30 and the magnetic layers 32 and 38 around the first yoke layer 30. And an insulating layer 52 made of an insulating material and disposed on the insulating layer 51. The second coil 11 and the lead layer 10 are disposed on the insulating layer 52. The insulating layers 51 and 52 are made of alumina, for example.

  The magnetic head further includes an insulating layer 53 made of an insulating material disposed between the windings of the second coil 11 and around the second coil 11, the lead layer 10, and the magnetic layer 32, and the magnetic layer 38 and the insulating layer. And an insulating layer 54 made of an insulating material and disposed around 53. The upper surfaces of the second coil 11, the lead layer 10, the magnetic layers 32 and 38, and the insulating layers 53 and 54 are flattened. The insulating layer 53 is made of, for example, a photoresist. The insulating layer 54 is made of alumina, for example.

  The magnetic layer 33 is disposed on the magnetic layer 32. The magnetic layer 39 is disposed on the magnetic layer 38 and the insulating layer 54. The magnetic layer 39 has an end face disposed on the medium facing surface 80. The magnetic head further includes an insulating layer 55 made of an insulating material disposed on the top surfaces of the second coil 11, the lead layer 10 and the insulating layers 53 and 54, and the insulating layer 55 around the magnetic layers 33 and 39. And an insulating layer 56 made of an insulating material. The top surfaces of the magnetic layers 33 and 39 and the insulating layer 56 are flattened. The insulating layers 55 and 56 are made of alumina, for example.

  As shown in FIG. 2, the recording shield 16 includes a first shield 16A, a second shield 16B, and two side shields 16C and 16D. The two side shields 16C and 16D are arranged on both sides of the main magnetic pole 15 in the track width direction TW. The first shield 16A is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. The second shield 16B is disposed behind the main magnetic pole 15 in the traveling direction T of the recording medium. The side shields 16C and 16D magnetically connect the first shield 16A and the second shield 16B.

  As shown in FIGS. 1 and 2, the first shield 16A has a first end surface portion 16Aa, a lower surface, an upper surface, and a connection surface connecting the first end surface portion 16Aa and the upper surface. ing. The distance from the medium facing surface 80 at an arbitrary position on the connection surface of the first shield 16 </ b> A increases as the arbitrary position moves away from the upper surface 1 a of the substrate 1. As shown in FIG. 2, the second shield 16B has a second end face portion 16Ba. The side shield 16C has a third end face portion 16Ca. The side shield 16D has a fourth end surface portion 16Da.

  The second shield 16 </ b> B is disposed on the magnetic layer 39. The magnetic layer 34 is disposed on the magnetic layer 33. The magnetic head further includes a nonmagnetic layer 57 made of a nonmagnetic material. The nonmagnetic layer 57 is disposed around a part of the upper surface of the magnetic layer 39 and the upper surface of the insulating layer 56 around the second shield 16 </ b> B and the magnetic layer 34. The nonmagnetic layer 57 is made of alumina, for example.

  The main magnetic pole 15 has a top surface (see FIG. 1) which is a surface located at the front end in the traveling direction T of the recording medium, a bottom end opposite to the top surface (see FIG. 1), and both sides in the track width direction TW. And first and second side portions (see FIG. 2). The side shield 16 </ b> C has a first side wall that faces the first side portion of the main magnetic pole 15. The side shield 16 </ b> D has a second side wall that faces the second side portion of the main magnetic pole 15.

  The gap portion 17 is provided between the main magnetic pole 15 and the recording shield 16. The magnetic head is further made of a nonmagnetic material, a part of which is a first gap layer 19 constituting a part of the gap part 17, and a part of the gap part 17 made of a nonmagnetic material. And a second gap layer 18 constituting the part. A portion of the first gap layer 19 that constitutes a part of the gap portion 17 is disposed between the main magnetic pole 15 and the first shield 16A. A portion of the second gap layer 18 that constitutes another part of the gap portion 17 is disposed between the main pole 15, the second shield 16 </ b> B, and the side shields 16 </ b> C and 16 </ b> D.

  The side shields 16C and 16D are disposed on the second shield 16B and are in contact with the upper surface of the second shield 16B. The second gap layer 18 is disposed along the side walls of the side shields 16C and 16D, the second shield 16B, and the upper surfaces of the nonmagnetic layers 57. The second gap layer 18 is made of a nonmagnetic material. The nonmagnetic material constituting the second gap layer 18 may be an insulating material or a nonmagnetic metal material. As an insulating material constituting the second gap layer 18, for example, alumina is used. For example, Ru is used as the nonmagnetic metal material constituting the second gap layer 18.

  The main magnetic pole 15 is placed on the second shield 16B and the nonmagnetic layer 57 so that the second gap layer 18 is interposed between the upper surface of the second shield 16B and the nonmagnetic layer 57 and the main magnetic pole 15. Has been placed. Further, as shown in FIG. 2, the second gap layer 18 is also interposed between the main magnetic pole 15 and the side shields 16C and 16D.

  The main pole 15 is made of a metal magnetic material. As a material of the main magnetic pole 15, for example, any one of NiFe, CoNiFe, and CoFe can be used. The shape of the main pole 15 will be described in detail later.

  The magnetic layer 35 is disposed on the magnetic layer 34. The magnetic head further includes a nonmagnetic layer 61 made of a nonmagnetic material and disposed around the main magnetic pole 15, the side shields 16 </ b> C and 16 </ b> D, and the magnetic layer 35. In the present embodiment, in particular, the nonmagnetic layer 61 is made of a nonmagnetic insulating material such as alumina.

  The magnetic head further includes a nonmagnetic metal layer 58 made of a nonmagnetic metal material disposed on a part of the upper surface of the main pole 15 at a position away from the medium facing surface 80, and the nonmagnetic metal layer 58. And an insulating layer 59 made of an insulating material and disposed on the upper surface. The nonmagnetic metal layer 58 is made of, for example, Ru, NiCr, or NiCu. The insulating layer 59 is made of alumina, for example.

  The first gap layer 19 is disposed so as to cover the main pole 15, the nonmagnetic metal layer 58 and the insulating layer 59. The first gap layer 19 is made of a nonmagnetic material. The material of the first gap layer 19 may be a nonmagnetic insulating material such as alumina, or a nonmagnetic conductive material such as Ru, NiCu, Ta, W, NiB, or NiP.

  The first shield 16A is disposed on the side shields 16C and 16D and the first gap layer 19, and is in contact with the upper surfaces of the side shields 16C and 16D and the first gap layer 19. In the medium facing surface 80, a part of the first end surface portion 16 </ b> Aa of the first shield 16 </ b> A is arranged with a predetermined interval depending on the thickness of the first gap layer 19 with respect to the end surface of the main pole 15. Yes. The thickness of the first gap layer 19 is preferably in the range of 5 to 60 nm, for example, in the range of 30 to 60 nm. The end face of the main pole 15 has a side adjacent to the first gap layer 19, and this side defines the track width.

  The magnetic layer 36 is disposed on the magnetic layer 35. The magnetic layer 42 is disposed on the main pole 15 at a position away from the medium facing surface 80. The first coil 21 is continuous with the lead layer 20. In FIG. 4, the boundary between the first coil 21 and the lead layer 20 is indicated by a dotted line. The first coil 21 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 21 is connected to the first connecting portion 41 (magnetic layer 42) and the second connecting portion 31. It passes between (magnetic layer 36).

  The magnetic head further includes an insulating film 62 and insulating layers 63 and 64 made of an insulating material. The insulating film 62 is provided so as to be in contact with surfaces other than the upper surfaces of the first coil 21 and the lead layer 20. The insulating layer 63 is disposed around the first coil 21, the lead layer 20, the first shield 16 </ b> A, and the magnetic layer 36. The top surfaces of the first coil 21, the lead layer 20, the first shield 16A, the magnetic layers 36 and 42, the insulating film 62, and the insulating layer 63 are flattened. The insulating layer 64 is disposed on the top surfaces of the first coil 21, the lead layer 20, and the insulating film 62. The insulating film 62 and the insulating layers 63 and 64 are made of alumina, for example.

  The second yoke layer 40 is disposed on the first shield 16 </ b> A, the magnetic layers 36 and 42, and the insulating layer 64. Further, the second yoke layer 40 has an end surface facing the medium facing surface 80, and this end surface is disposed at a position away from the medium facing surface 80. The distance from the medium facing surface 80 at an arbitrary position on the end face of the second yoke layer 40 increases as the arbitrary position moves away from the upper surface 1 a of the substrate 1.

  The magnetic head further includes an insulating layer 68 made of an insulating material arranged around the second yoke layer 40 and a protective layer 70 made of a nonmagnetic material and arranged to cover the recording head portion 9. ing. The insulating layer 68 is made of alumina, for example. The protective layer 70 is formed of, for example, an inorganic insulating material such as alumina.

  As described above, the magnetic head according to the present embodiment includes the medium facing surface 80 facing the recording medium, the reproducing head unit 8, and the recording head unit 9. The reproducing head unit 8 and the recording head unit 9 are stacked on the substrate 1. The reproducing head unit 8 is arranged on the rear side (leading side) of the recording medium traveling direction T with respect to the recording head unit 9.

  The recording head unit 9 includes a first coil 21, a second coil 11, lead layers 10 and 20, a main magnetic pole 15, a recording shield 16, a gap unit 17, a first yoke layer 30, It has a second yoke layer 40, a first connecting part 41, a second connecting part 31, and magnetic layers 38 and 39. The recording shield 16 includes a first shield 16A, a second shield 16B, and two side shields 16C and 16D. The gap portion 17 is constituted by a part of the first gap layer 19 and a part of the second gap layer 18.

  The first yoke layer 30 is disposed behind the main magnetic pole 15 in the traveling direction T of the recording medium. The first yoke layer 30 is magnetically connected to the second shield 16B of the recording shield 16 via the magnetic layers 38 and 39. The second yoke layer 40 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. Further, the second yoke layer 40 is magnetically connected to the first shield 16A of the recording shield 16.

  The first connecting portion 41 magnetically connects the main magnetic pole 15 and the second yoke layer 40. The second connecting portion 31 magnetically connects the first yoke layer 30 and the second yoke layer 40.

  Next, the first coil 21 and the second coil 11 will be described in detail with reference to FIG. 1, FIG. 3, and FIG. As shown in FIG. 1, the second coil 11 is arranged behind the main magnetic pole 15 in the traveling direction T of the recording medium. As shown in FIG. 3, the second coil 11 is wound around the second coupling portion 31 (magnetic layer 32). In the example shown in FIG. 3, the second coil 11 is wound about the second coupling portion 31 (magnetic layer 32) about twice. The second coil 11 has a coil connection part 11 </ b> S that is electrically connected to the first coil 21. As viewed from above, the second coil 11 is wound in the clockwise direction from the coil connection portion 11S toward the boundary with the lead layer 10.

  As shown in FIG. 4, the first coil 21 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 21 is connected to the first connecting portion 41 (magnetic layer 42). It passes between the second coupling parts 31 (magnetic layer 36). In the example shown in FIG. 4, the first coil 21 is wound about once around the first coupling portion 41 (magnetic layer 42).

  Further, the first coil 21 has a coil connection part 21 </ b> E that is electrically connected to the coil connection part 11 </ b> S of the second coil 11. As viewed from above, the first coil 21 is wound in the counterclockwise direction from the boundary with the lead layer 20 toward the coil connection portion 21E. The coil connection portion 21E is electrically connected to the coil connection portion 11S through a columnar connection layer (not shown) that penetrates a plurality of layers between the first coil 21 and the second coil 11. The connection layer is made of a conductive material such as copper. In the example shown in FIGS. 3 and 4, the first coil 21 and the second coil 11 are connected in series.

  Next, the shape of the main pole 15 will be described in detail with reference to FIGS. As shown in FIGS. 3 and 4, the main pole 15 includes a track width defining portion 15A having an end surface disposed on the medium facing surface 80 and an end portion on the opposite side, and an end portion of the track width defining portion 15A. And a wide portion 15B connected to the. Further, as shown in FIGS. 1 and 2, the main magnetic pole 15 has an upper surface which is a surface located at the front end in the traveling direction T of the recording medium, a lower end portion opposite to the upper surface, and a first It has a side part and a second side part. The width of the upper surface of the wide portion 15B in the track width direction TW is larger than the width of the upper surface of the track width defining portion 15A in the track width direction TW.

  The width of the upper surface of the track width defining portion 15 </ b> A in the track width direction TW is substantially constant regardless of the distance from the medium facing surface 80. The width of the upper surface of the wide portion 15B in the track width direction TW is equal to the width of the upper surface of the track width defining portion 15A in the track width direction TW at the boundary position with the track width defining portion 15A, for example. After gradually becoming larger, it has become a certain size. Here, the length of the track width defining portion 15A in the direction perpendicular to the medium facing surface 80 is referred to as a neck height. The neck height is, for example, in the range of 0 to 0.3 μm. When the neck height is 0, there is no track width defining portion 15A, and the end surface of the wide portion 15B is disposed on the medium facing surface 80.

  The upper surface of the main pole 15 includes a first portion, a second portion, a third portion, and a fourth portion that are arranged so as to be continuous in the order close to the medium facing surface 80. The first portion has a first end disposed on the medium facing surface 80 and a second end opposite to the first end. The second part is connected to the second end of the first part. The third portion has a first end connected to the second portion and a second end disposed at a position farther from the medium facing surface 80 than the first end. Yes. The fourth part is connected to the second end of the third part. Each of the first and third portions is inclined so that the second end thereof is disposed on the front side in the traveling direction T of the recording medium with respect to the first end. The second and fourth portions extend in a direction substantially perpendicular to the medium facing surface 80. The lower surface of the first shield 16 </ b> A includes a portion that faces the first portion of the upper surface of the main pole 15 through the first gap layer 19 that constitutes a part of the gap portion 17.

  The lower end portion of the main pole 15 includes a first portion, a second portion, a third portion, and a fourth portion that are arranged so as to be continuous in the order close to the medium facing surface 80. The first portion has a first end disposed on the medium facing surface 80 and a second end opposite to the first end. The second part is connected to the second end of the first part. The third portion has a first end connected to the second portion and a second end disposed at a position farther from the medium facing surface 80 than the first end. Yes. The first to third portions may be edges formed by the intersection of two surfaces, or may be surfaces that connect the two surfaces. The fourth portion is a surface connected to the second end of the third portion. Each of the first and third portions is inclined such that the second end portion thereof is disposed on the rear side in the traveling direction T of the recording medium with respect to the first end portion. The second and fourth portions extend in a direction substantially perpendicular to the medium facing surface 80.

  The end face of the main pole 15 disposed on the medium facing surface 80 includes a first side adjacent to the first gap layer 19, a second side connected to one end of the first side, and a first side And a third side connected to the other end of the side. The first side defines the track width. The position of the end portion of the recording bit recorded on the recording medium is determined by the position of the first side. The width of the end face of the main pole 15 disposed on the medium facing surface 80 in the track width direction TW decreases as the distance from the first side increases, that is, as the surface approaches the upper surface 1a of the substrate 1. The angles formed by the second side and the third side with respect to the direction perpendicular to the upper surface 1a of the substrate 1 are, for example, in the range of 7 ° to 17 ° and in the range of 10 ° to 15 °. Is preferred. The length of the first side is, for example, in the range of 0.05 to 0.20 μm.

  Next, functions and effects of the magnetic head according to the present embodiment will be described. In this magnetic head, information is recorded on a recording medium by the recording head unit 9, and information recorded on the recording medium is reproduced by the reproducing head unit 8. In the recording head unit 9, the first coil 21 and the second coil 11 generate a magnetic field according to information to be recorded on the recording medium. The magnetic flux corresponding to the magnetic field generated by the first coil 21 passes through the first connecting portion 41 and the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the second coil 11 passes through the second connecting portion 31, the second yoke layer 40, the first connecting portion 41, and the main magnetic pole 15. Therefore, the main magnetic pole 15 passes the magnetic flux corresponding to the magnetic field generated by the first coil 21 and the magnetic flux corresponding to the magnetic field generated by the second coil 11.

  The first coil 21 and the second coil 11 may be connected in series or may be connected in parallel. In any case, in the main magnetic pole 15, the first magnetic flux 15 corresponding to the magnetic field generated by the first coil 21 and the magnetic flux generated by the second coil 11 so that the magnetic flux corresponding to the magnetic field generated in the same direction flow in the same direction. The coil 21 and the second coil 11 are connected.

  The main magnetic pole 15 passes a magnetic flux corresponding to the magnetic field generated by the first coil 21 and the second coil 11 as described above, and a recording magnetic field for recording information on a recording medium by a perpendicular magnetic recording method. Is generated.

  The recording shield 16 takes in a disturbance magnetic field applied to the magnetic head from the outside of the magnetic head. Thereby, it is possible to prevent the recording medium from being erroneously recorded by the disturbance magnetic field being concentrated and taken into the main magnetic pole 15. The recording shield 16 has a function of taking in a magnetic flux generated from the end face of the main magnetic pole 15 and spreading in a direction other than the direction perpendicular to the surface of the recording medium and preventing the magnetic flux from reaching the recording medium. Yes.

  The write shield 16, the first yoke layer 30, the second yoke layer 40, the first coupling portion 41, the second coupling portion 31, and the magnetic layers 38 and 39 are generated from the end face of the main pole 15. In addition, it has a function of returning a magnetic flux magnetized in the recording medium. More specifically, a part of the magnetic flux generated from the end face of the main pole 15 and magnetizing the recording medium passes through the recording shield 16, the second yoke layer 40, and the first coupling portion 41 (magnetic layer 42). It passes through the first magnetic path passing therethrough and returns to the main magnetic pole 15. Further, another part of the magnetic flux generated from the end face of the main pole 15 and magnetizing the recording medium includes the recording shield 16, the magnetic layers 39 and 38, the first yoke layer 30, and the second connecting portion 31 (magnetic Layers 32 to 36), the second yoke layer 40, and the first coupling portion 41, and then returns to the main magnetic pole 15 through the second magnetic path. Thus, in the present embodiment, the first and second magnetic paths from the recording shield 16 to the main magnetic pole 15 are formed. The first magnetic path is disposed in front of the main magnetic pole 15 in the traveling direction T of the recording medium, and connects the portion of the main magnetic pole 15 away from the medium facing surface 80 and the recording shield 16.

  The recording shield 16 includes a first shield 16A, a second shield 16B, and two side shields 16C and 16D. Thus, according to the present embodiment, the recording medium is generated from the end face of the main pole 15 on the front and rear sides in the traveling direction T of the recording medium and on both sides in the track width direction TW with respect to the end face of the main pole 15. The magnetic flux spreading in a direction other than the direction perpendicular to the surface can be taken in and the magnetic flux can be prevented from reaching the recording medium. As a result, according to the present embodiment, it is possible to suppress the occurrence of adjacent track erasure due to skew. The first and second shields 16A and 16B contribute to suppressing the occurrence of adjacent track erasure due to skew and increasing the recording magnetic field gradient. The side shields 16C and 16D have a large contribution particularly to suppressing adjacent track erasure. With such a function of the recording shield 16, according to the present embodiment, the recording density can be increased.

  In the present embodiment, as shown in FIG. 2, the distance between the first and second side portions of the main pole 15 in the track width direction TW on the medium facing surface 80, that is, the width of the end face of the main pole 15 is , It becomes smaller as it approaches the upper surface 1a of the substrate 1. According to the present embodiment, the occurrence of adjacent track erasure due to skew can also be suppressed by this feature.

  In the present embodiment, in the medium facing surface 80, the distance between the first and second side walls of the side shields 16C and 16D in the track width direction TW is the distance between the first and second side portions of the main pole 15. In the same manner as in FIG. Therefore, according to the present embodiment, in the medium facing surface 80, the distance between the first side and the first side wall and the distance between the second side and the second side wall are small and uniform. It becomes possible to. Thereby, the magnetic flux generated from the end face of the main pole 15 and spreading on both sides in the track width direction TW can be effectively taken in by the side shields 16C and 16D. As a result, according to the present embodiment, the functions of the side shields 16C and 16D can be enhanced, and the occurrence of adjacent track erasure due to skew can be more effectively suppressed.

  In order to exhibit the function of the recording shield 16 effectively, it is important that a large amount of magnetic flux can be taken in by the recording shield 16. Therefore, it is effective that the magnetic head includes the first and second magnetic paths from the recording shield 16 to the main magnetic pole 15 as in the present embodiment.

  In the present embodiment, the top surface of the main magnetic pole 15 is inclined so that the second end thereof is disposed on the front side in the traveling direction T of the recording medium with respect to the first end. The first lower portion of the main pole 15 including the third portion is inclined such that the second end thereof is disposed on the rear side in the traveling direction T of the recording medium with respect to the first end. And a third portion. Thereby, according to the present embodiment, the thickness of the main magnetic pole 15 in the medium facing surface 80 can be reduced, so that the occurrence of adjacent track erasure due to skew can be suppressed. Further, since the thickness of the main magnetic pole 15 can be increased at a position away from the medium facing surface 80, a large amount of magnetic flux can be guided to the medium facing surface 80 by the main magnetic pole 15, and as a result, the overwrite characteristics, etc. Recording characteristics can be improved.

  Further, when the frequency of the recording signal is increased in order to increase the recording density, the magnetic head is required to improve the speed of change in the direction of the magnetic flux generated from the end face of the main magnetic pole 15. Further, the position of the end portion of the recording bit is determined by the position of the end portion disposed on the front side in the traveling direction T of the recording medium among the end surfaces of the main magnetic pole 15 disposed on the medium facing surface 80. Therefore, in order to increase the recording density, an improvement in the speed of change in the direction of the magnetic flux generated from the end face of the main pole 15 and an increase in the speed of change in the direction of the magnetic flux passing through the first shield 16A are required. . In order to meet this requirement, it is effective to shorten the length of the magnetic path passing through the first shield 16A and the main magnetic pole 15. In the present embodiment, the length of the magnetic path is longer by providing the first magnetic path connecting the main magnetic pole 15 and the first shield 16A than when the first magnetic path is not provided. The length can be shortened.

  In the present embodiment, the main magnetic pole 15, the gap portion 17 (a part of the gap layer 19), the write shield 16 and the first magnetic path (the second yoke layer 40 and the first coupling portion 41) A space surrounded by these is formed. The number of turns of the first coil 21 that passes through this space is about one. According to the present embodiment, the length of the first magnetic path can be shortened by reducing the number of turns of the first coil 21. Thereby, both the speed of change in the direction of the magnetic flux generated from the end face of the main pole 15 and the speed of change in the direction of the magnetic flux passing through the first shield 16A can be improved. As a result, the recording density Can be increased.

  However, if the number of turns of the first coil 21 is reduced, the magnetomotive force generated by the first coil 21 may be reduced, and it may not be possible to generate a sufficiently large recording magnetic field from the main pole 15. . On the other hand, in the present embodiment, in addition to the first magnetic path and the first coil 21, a second magnetic path and the second coil 11 are provided. Thus, even if the number of turns of the first coil 21 is reduced and the length of the first magnetic path is shortened, the main magnetic pole is generated by the magnetomotive force of the first coil 21 and the magnetomotive force of the second coil 11. 15 can generate a sufficiently large recording magnetic field.

  In the present embodiment, in particular, the number of turns of the second coil 11 is about 2, and the number of turns of the first coil 21 is about 1. Here, a magnetic head of a comparative example in which the second coil 11 is not provided and the first coil 21 is wound three times is considered. Other configurations of the magnetic head of the comparative example are the same as those of the magnetic head according to the present embodiment. The total magnetomotive force by the first coil 21 and the second coil 11 in the present embodiment is substantially equal to the magnetomotive force by the first coil 21 in the magnetic head of the comparative example. On the other hand, in this embodiment, since the number of turns of the first coil 21 is smaller than that of the magnetic head of the comparative example, the length of the first magnetic path can be shortened. In this manner, according to the present embodiment, the magnitude of the recording magnetic field generated from the main magnetic pole 15 is made equal to that of the magnetic head of the comparative example, while the first magnetic path of the comparative magnetic head is made. The length can be shortened.

  In the present embodiment, the number of turns of the second coil 11 can be increased without being restricted by the number of turns of the first coil 21. The number of turns of the second coil 11 may be equal to or greater than the number of turns of the first coil 21, or may be greater than the number of turns of the first coil 21. Then, by increasing the number of turns of the second coil 11 in this way, the magnetomotive force by the second coil 11 can be increased.

  In particular, in the present embodiment, the second connecting portion 31 is disposed at a position farther from the medium facing surface 80 than the first connecting portion 41. Thereby, the winding number of the 2nd coil 11 wound around the 2nd connection part 31 can be increased easily.

  Further, in the present embodiment, the second coil 11 is disposed on the rear side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. Therefore, the second coil 11 can be arranged without being restricted by the arrangement of the first coil 21. Thereby, the number of turns of the second coil 11 can be easily increased.

  From the above, according to the present embodiment, the length of the first magnetic path disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15 is shortened, and sufficient from the main magnetic pole 15. A recording magnetic field having a magnitude can be generated.

[Second Embodiment]
Next, a magnetic head according to a second embodiment of the invention will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 5 shows the main cross section. FIG. 6 is a plan view showing the first layer of the first coil in the magnetic head according to the present embodiment. FIG. 7 is a plan view showing the second layer of the first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the first embodiment in the following points. In the present embodiment, the first coupling portion 41 includes a magnetic layer 43 disposed on the magnetic layer 42 in addition to the magnetic layer 42. In addition to the magnetic layers 32 to 36, the second coupling portion 31 includes a magnetic layer 37 disposed on the magnetic layer 36. In addition, the recording head unit 9 has a magnetic layer 44 made of a magnetic material laminated on the first shield 16A. The magnetic layer 44 has an end surface facing the medium facing surface 80, and this end surface is disposed at a position away from the medium facing surface 80. The distance from the medium facing surface 80 at an arbitrary position on the end surface of the magnetic layer 44 increases as the arbitrary position moves away from the upper surface 1 a of the substrate 1. As the material of the magnetic layer 44, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used.

  In the present embodiment, the recording head unit 9 includes the first coil 22 having the first layer 22A and the second layer 22B instead of the first coil 21 in the first embodiment. Yes. The first coil 22 is made of a conductive material such as copper.

  The positional relationship of the first layer 22A with respect to the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 (magnetic layer 36) is the same as that of the first coil 21 in the first embodiment. . That is, the first layer 22A is wound around the first coupling portion 41 (magnetic layer 42), and a part thereof is the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 ( It passes between the magnetic layer 36). In the example shown in FIG. 6, the first layer 22A is wound about the first coupling portion 41 (magnetic layer 42) about once.

  The first layer 22A includes a coil connection portion 22AS electrically connected to the second layer 22B and a coil connection portion electrically connected to the coil connection portion 11S (see FIG. 3) of the second coil 11. 22AE. When viewed from above, the first layer 22A is wound in the counterclockwise direction from the coil connection portion 22AS toward the coil connection portion 22AE. The coil connection part 22AE is electrically connected to the coil connection part 11S via the connection layer described in the first embodiment.

  As shown in FIG. 7, the second layer 22 </ b> B is continuous with the lead layer 20. In FIG. 7, the boundary between the second layer 22B and the lead layer 20 is indicated by a dotted line. The second layer 22B is wound around the first coupling portion 41 (magnetic layer 43), and a part of the second layer 22B is part of the first coupling portion 41 (magnetic layer 43) and the second coupling portion 31 ( It passes between the magnetic layer 37). In the example shown in FIG. 7, the second layer 22 </ b> B is wound about the first coupling portion 41 (magnetic layer 43) about once.

  The second layer 22B has a coil connection portion 22BE that is electrically connected to the coil connection portion 22AS of the first layer 22A. As viewed from above, the second layer 22B is wound counterclockwise from the boundary with the lead layer 20 toward the coil connection portion 22BE.

  In addition, the magnetic head according to the present embodiment includes an insulating film 65 and insulating layers 66 and 67 made of an insulating material. The insulating film 65 is provided so as to be in contact with surfaces other than the upper surfaces of the second layer 22B and the lead layer 20. The insulating layer 66 is disposed around the second layer 22 </ b> B, the lead layer 20, and the magnetic layers 37 and 44. The upper surfaces of the second layer 22B, the lead layer 20, the magnetic layers 37, 43, and 44, the insulating film 65, and the insulating layer 66 are planarized. The insulating layer 67 is disposed on the upper surfaces of the second layer 22 </ b> B, the lead layer 20, and the insulating film 65. The insulating film 65 and the insulating layers 66 and 67 are made of alumina, for example.

  In the insulating layer 64 and the insulating film 65, an opening for exposing the coil connecting portion 22AS of the first layer 22A is formed. The coil connection portion 22BE of the second layer 22B is electrically connected to the coil connection portion 22AS through an opening formed in the insulating layer 64 and the insulating film 65.

  In the present embodiment, the second yoke layer 40 is disposed on the magnetic layers 37, 43, 44 and the insulating layer 67. The first coupling portion 41 (magnetic layers 42, 43) magnetically couples the main magnetic pole 15 and the second yoke layer 40. The second coupling portion 31 (magnetic layers 32 to 37) magnetically couples the first yoke layer 30 and the second yoke layer 40. The magnetic layer 44 magnetically couples the first shield 16 </ b> A of the recording shield 16 and the second yoke layer 40.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the first layer 22 </ b> A and the second layer 22 </ b> B of the first coil 22 passes through the first coupling portion 41 and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the first embodiment.

[Third Embodiment]
Next, a magnetic head according to a third embodiment of the invention will be described with reference to FIGS. FIG. 8 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 8 shows the main cross section. FIG. 9 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 10 is a plan view showing the first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the first embodiment in the following points. In the present embodiment, the recording head unit 9 has a first coil 23 and a second coil 12 instead of the first coil 21 and the second coil 11 in the first embodiment. . Both the first coil 23 and the second coil 12 are made of a conductive material such as copper.

  The positional relationship of the second coil 12 with respect to the main magnetic pole 15, the second coupling portion 31 (magnetic layer 32), and the lead layer 10 is the same as that of the second coil 11 in the first embodiment. That is, the second coil 12 is disposed behind the main magnetic pole 15 in the recording medium traveling direction T, and is wound around the second coupling portion 31 (magnetic layer 32). In the example shown in FIG. 9, the second coil 12 is wound about four times around the second coupling portion 31 (magnetic layer 32). The lead layer 10 is continuous with the second coil 12. In FIG. 9, the boundary between the second coil 12 and the lead layer 10 is indicated by a dotted line. Further, the second coil 12 has a coil connection part 12 </ b> S electrically connected to the first coil 23. As viewed from above, the second coil 12 is wound in the clockwise direction from the coil connecting portion 12S toward the boundary with the lead layer 10.

  The positional relationship of the first coil 23 with respect to the lead layer 20, the first coupling portion 41 (magnetic layer 42), and the second coupling portion 31 (magnetic layer 36) is the first coil in the first embodiment. 21. That is, the first coil 23 is continuous with the lead layer 20. In FIG. 10, the boundary between the first coil 23 and the lead layer 20 is indicated by a dotted line. The first coil 23 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 23 is connected to the first connecting portion 41 (magnetic layer 42) and the second connecting portion 31. It passes between (magnetic layer 36). In the example illustrated in FIG. 10, the first coil 23 is wound about the first coupling portion 41 (magnetic layer 42) about twice. In addition, the first coil 23 has a coil connection part 23 </ b> E that is electrically connected to the coil connection part 12 </ b> S of the second coil 12. As viewed from above, the first coil 23 is wound in the counterclockwise direction from the boundary with the lead layer 20 toward the coil connection portion 23E.

  In the present embodiment, the recording head unit 9 further includes a lead layer 81 disposed between the first coil 23 and the second coil 12 at a position away from the main cross section. The lead layer 81 is made of a conductive material such as copper. As shown in FIG. 10, the lead layer 81 extends in a direction perpendicular to the medium facing surface 80. The coil connection portion 23E of the first coil 23 is connected to the second coil via a columnar connection layer (not shown) penetrating a plurality of layers between the first coil 23 and the second coil 12 and the lead layer 81. The coil 12 is electrically connected to the coil connecting portion 12S. The connection layer and the lead layer 81 are connected in series. In this case, the lead layer 81 may be directly connected to the coil connection portion 12S, and the connection layer may connect the lead layer 81 and the coil connection portion 23E. Alternatively, the lead layer 81 may be directly connected to the coil connection portion 23E, and the connection layer may connect the lead layer 81 and the coil connection portion 12S.

  In addition, the magnetic head according to the present embodiment includes an insulating layer 69 made of an insulating material and disposed between the windings of the first coil 23. The insulating layer 69 is made of, for example, a photoresist.

  In the present embodiment, the upper surface of the main magnetic pole 15 does not include the second and third portions of the first to fourth portions described in the first embodiment. On the upper surface of the main magnetic pole 15, the fourth portion is connected to the second end of the first portion.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the first coil 23 passes through the first connecting portion 41 and the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the second coil 12 passes through the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the first embodiment.

[Fourth Embodiment]
Next, with reference to FIGS. 11 and 12, a magnetic head according to a fourth embodiment of the invention will be described. FIG. 11 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 11 shows the main cross section. FIG. 12 is a plan view showing first and second coils in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the first embodiment in the following points. In the present embodiment, the magnetic layers 32, 33, 38, 39 and the insulating layers 52 to 56 are not provided. The first yoke layer 30 in the present embodiment has an end face disposed on the medium facing surface 80, is in contact with the second shield 16B of the recording shield 16, and is magnetically connected to the second shield 16B. Yes. The magnetic layer 34 is in contact with the upper surface of the first yoke layer 30.

  Further, in the present embodiment, the recording head unit 9 has a first coil 24 and a second coil 25 instead of the first coil 21 and the second coil 11 in the first embodiment. ing. In FIG. 12, the boundaries of the first coil 24, the second coil 25, and the lead layer 20 are indicated by dotted lines. The first and second coils 24 and 25 are both made of a conductive material such as copper.

  The positional relationship of the first coil 24 with respect to the lead layer 20, the first coupling portion 41 (magnetic layer 42), and the second coupling portion 31 (magnetic layer 36) is the first coil in the first embodiment. 21. That is, the first coil 24 is continuous with the lead layer 20. The first coil 24 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 24 and the second connecting portion 31 are wound around the first connecting portion 41 (magnetic layer 42). It passes between (magnetic layer 36). In the example shown in FIG. 12, the first coil 24 is wound about the first coupling portion 41 (magnetic layer 42) about once.

  The second coil 25 is continuous with the first coil 24 and is wound around the second coupling portion 31 (magnetic layer 36). In the example shown in FIG. 12, the second coil 25 is wound about once around the second coupling portion 31 (magnetic layer 36). Further, the second coil 25 has a coil connection part 25 </ b> E electrically connected to the lead layer 10.

  As viewed from above, the first coil 24 is wound counterclockwise from the boundary with the lead layer 20 toward the boundary with the second coil 25. As viewed from above, the second coil 25 is wound in a clockwise direction from the boundary with the first coil 24 toward the coil connection portion 25E. An insulating layer 63 is disposed between the windings of the first and second coils 24 and 25 and around the first coil 24 and the second coil 25.

  The lead layer 10 may be disposed at a position closer to the upper surface 1 a of the substrate 1 than the first and second coils 24 and 25, or the substrate 1 than the first and second coils 24 and 25. It may be arranged at a position farther from the upper surface 1a.

  In the present embodiment, the second coil 25 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the first coil 24 passes through the first connecting portion 41 and the main magnetic pole 15. The magnetic flux corresponding to the magnetic field generated by the second coil 25 passes through the second connecting portion 31, the second yoke layer 40, the first connecting portion 41, and the main magnetic pole 15.

  In the present embodiment, the effect obtained by disposing the second coil 11 behind the main magnetic pole 15 in the traveling direction T of the recording medium in the first embodiment cannot be obtained. Instead, according to the present embodiment, there is no coil between the reproducing head unit 8 and the main magnetic pole 15, so that the distance between the reproducing head unit 8 and the main magnetic pole 15 can be reduced. Become. Other configurations, operations, and effects in the present embodiment are the same as those in the first embodiment.

[Fifth Embodiment]
Next, a magnetic head according to a fifth embodiment of the invention will be described with reference to FIGS. FIG. 13 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 13 shows the main cross section. FIG. 14 is a plan view showing a second coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the fourth embodiment in the following points. In the present embodiment, the recording head unit 9 has the first coil 21 in the first embodiment instead of the first coil 24 in the fourth embodiment.

  In the present embodiment, the recording head unit 9 includes a second coil 26 instead of the second coil 25 in the fourth embodiment. Here, a virtual plane that intersects with the end face of the main pole 15 disposed on the medium facing surface 80 and is perpendicular to the traveling direction T of the recording medium is assumed. The 2nd coil 26 is arrange | positioned in the position which cross | intersects the said virtual plane. The second coil 26 is made of a conductive material such as copper.

  As shown in FIG. 14, the second coil 26 is wound around the second coupling portion 31 (magnetic layer 35). In the example shown in FIG. 14, the second coil 26 is wound about the second coupling portion 31 (magnetic layer 35) about once. The lead layer 10 is continuous with the second coil 26. In FIG. 14, the boundary between the second coil 26 and the lead layer 10 is indicated by a dotted line.

  Further, the second coil 26 has a coil connection portion 26 </ b> S electrically connected to the coil connection portion 21 </ b> E (see FIG. 4) of the first coil 21. As viewed from above, the second coil 26 is wound in a clockwise direction from the coil connecting portion 26S toward the boundary with the lead layer 10.

  An insulating film 62 is interposed between the first coil 21 and the second coil 26. The insulating film 62 has an opening that exposes the coil connection portion 26S. The coil connection portion 26S is electrically connected to the coil connection portion 21E through an opening formed in the insulating film 62.

  A nonmagnetic layer 61 is disposed around the second coil 26 and the lead layer 10. In addition, the magnetic head according to the present embodiment includes an insulating material interposed between the second coil 26 and the lead layer 10 and the main pole 15, the second gap layer 18, the magnetic layer 35, and the nonmagnetic layer 57. An insulating film 60 is provided. The insulating film 60 is made of alumina, for example.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the second coil 26 passes through the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the first or fourth embodiment.

[Sixth Embodiment]
Next, with reference to FIGS. 15 to 17, a magnetic head according to a sixth embodiment of the invention will be described. FIG. 15 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 15 shows the main cross section. FIG. 16 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 17 is a plan view showing a first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the fifth embodiment in the following points. In the present embodiment, the recording head unit 9 has a second coil 27 instead of the second coil 26 in the fifth embodiment. The second coil 27 is made of a conductive material such as copper.

  The positional relationship of the second coil 27 with respect to the main magnetic pole 15 and the second coupling portion 31 (magnetic layer 35) is the same as that of the second coil 26 in the fifth embodiment. That is, the second coil 27 is arranged at a position that intersects the virtual plane described in the fifth embodiment. The second coil 27 is wound around the second connecting portion 31 (magnetic layer 35). In the example shown in FIG. 16, the second coil 27 is wound about twice around the second coupling portion 31 (magnetic layer 35). A nonmagnetic layer 61 is disposed between and around the winding of the second coil 27.

  In the present embodiment, the lead layer 10 is located on the same plane as the first coil 21 and the lead layer 20. The second coil 27 has a coil connection part 27 </ b> S electrically connected to the coil connection part 21 </ b> E of the first coil 21 and a coil connection part 27 </ b> E electrically connected to the lead layer 10. . As viewed from above, the second coil 27 is wound in the clockwise direction from the coil connection portion 27S toward the coil connection portion 27E. The lead layer 10 may be disposed at a position closer to the upper surface 1 a of the substrate 1 than the second coil 27.

  An insulating film 62 is interposed between the first coil 21 and the lead layer 10 and the second coil 27. The insulating film 62 has openings for exposing the coil connection portions 27S and 27E. The coil connection portion 27S is electrically connected to the coil connection portion 21E through one of the openings formed in the insulating film 62. As shown in FIG. 17, in the present embodiment, the coil connection portion 21E is arranged at a position different from the position shown in FIG. 4 in the first embodiment. The coil connection part 27 </ b> E is electrically connected to the lead layer 10 through the other one of the openings formed in the insulating film 62.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the second coil 27 passes through the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the fifth embodiment.

[Seventh Embodiment]
Next, with reference to FIG. 18, a magnetic head according to a seventh embodiment of the invention will be described. FIG. 18 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 18 shows the main cross section.

  The magnetic head according to the present embodiment is different from the magnetic head according to the fifth embodiment in the following points. In the present embodiment, the recording head unit 9 has the first coil 24 in the fourth embodiment instead of the first coil 21 in the fifth embodiment. In addition, the recording head unit 9 has a second coil having a first layer 26A and a second layer 25B instead of the second coil 26 in the fifth embodiment. The shape and arrangement of the first layer 26A are the same as those of the second coil 26 in the fifth embodiment. The shape and arrangement of the second layer 25B are the same as those of the second coil 25 in the fourth embodiment. The second coil has a coil connection portion 26S (see FIG. 14) provided in the first layer 26A and a coil connection portion 25E (see FIG. 12) provided in the second layer 25B. . The coil connection part 25E is electrically connected to the coil connection part 26S through an opening formed in the insulating film 62. In the present embodiment, the first layer 26A, which is a part of the second coil, is disposed at a position that intersects the virtual plane described in the fifth embodiment.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the first layer 26A and the second layer 25B of the second coil is generated by the second coupling part 31, the second yoke layer 40, and the first coupling part. 41 and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the fourth or fifth embodiment.

[Eighth Embodiment]
Next, with reference to FIGS. 19 to 21, a magnetic head according to an eighth embodiment of the invention will be described. FIG. 19 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 19 shows the main cross section. FIG. 20 is a plan view showing the first layer of the first coil and the first layer of the second coil in the magnetic head according to the present embodiment. FIG. 21 is a plan view showing the second layer of the first coil and the second layer of the second coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the second embodiment in the following points. In the present embodiment, similarly to the fourth embodiment, the magnetic layers 32, 33, 38, 39 and the insulating layers 52 to 56 are not provided. The shape and arrangement of the first yoke layer 30 in the present embodiment are the same as those in the fourth embodiment.

  Further, in the present embodiment, the recording head unit 9 has a first coil 28 and a second coil 29 instead of the first coil 22 and the second coil 11 in the second embodiment. ing. The first coil 28 has a first layer 28A and a second layer 28B. The second coil 29 has a first layer 29A and a second layer 29B. The first and second coils 28 and 29 are both made of a conductive material such as copper.

  FIG. 20 is a plan view showing the first layer 28 </ b> A of the first coil 28 and the first layer 29 </ b> A of the second coil 29. The first layers 28A and 29A are located on the same plane and are continuous with each other. In FIG. 20, the boundary between the first layers 28A and 29A is indicated by a dotted line.

  The positional relationship of the first layer 28A with respect to the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 (magnetic layer 36) is the same as that of the first layer 22A in the second embodiment. That is, the first layer 28A is wound around the first coupling portion 41 (magnetic layer 42), and a part thereof is the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 ( It passes between the magnetic layer 36). In the example shown in FIG. 20, the first layer 28A is wound about once around the first coupling portion 41 (magnetic layer 42). The first coil 28 has a coil connection portion 28AS provided in the first layer 28A.

  The first layer 29A is wound around the second coupling portion 31 (magnetic layer 36). In the example shown in FIG. 20, the first layer 29A is wound about the second coupling portion 31 (magnetic layer 36) about once. The second coil 29 has a coil connection part 29AE provided in the first layer 29A.

  As viewed from above, the first layer 28A is wound in the counterclockwise direction from the coil connection portion 28AS toward the boundary with the first layer 29A. When viewed from above, the first layer 29A is wound clockwise from the boundary with the first layer 28A toward the coil connection portion 29AE. An insulating layer 63 is disposed between and around the windings of the first layers 28A and 29A.

  In the present embodiment, the lead layer 10 is disposed closer to the upper surface 1a of the substrate 1 than the first layers 28A and 29A. The coil connection portion 29AE provided in the first layer 29A is electrically connected to the lead layer 10.

  FIG. 21 is a plan view showing the second layer 28 </ b> B of the first coil 28 and the second layer 29 </ b> B of the second coil 29. The second layers 28B and 29B and the lead layer 20 are located on the same plane and are continuous with each other. In FIG. 21, the boundaries between the second layers 28B and 29B and the lead layer 20 are indicated by dotted lines.

  The second layer 29B is wound around the second coupling portion 31 (magnetic layer 37). In the example shown in FIG. 21, the second layer 29B is wound about the second coupling portion 31 (magnetic layer 37) about once.

  The positional relationship of the second layer 28B with respect to the first coupling portion 41 (magnetic layer 43) and the second coupling portion 31 (magnetic layer 37) is the same as that of the second layer 22B in the second embodiment. That is, the second layer 28B is wound around the first coupling part 41 (magnetic layer 43), and a part of the second layer 28B is part of the first coupling part 41 (magnetic layer 43) and the second coupling part 31 ( It passes between the magnetic layer 37). In the example shown in FIG. 21, the second layer 28B is wound about the first coupling portion 41 (magnetic layer 43) about once. Further, the first coil 28 has a coil connection portion 28BE provided in the second layer 28B.

  As viewed from above, the second layer 29B is wound in a clockwise direction from the boundary with the lead layer 20 toward the boundary with the second layer 28B. When viewed from above, the second layer 28B is wound in the counterclockwise direction from the boundary with the second layer 29B toward the coil connection portion 29BE. An insulating layer 66 is disposed between and around the windings of the second layers 28B and 29B.

  An insulating layer 64 and an insulating film 65 are interposed between the first layer 28A and the second layer 28B. In the insulating layer 64 and the insulating film 65, an opening for exposing the coil connecting portion 28AS provided in the first layer 28A is formed. The coil connection portion 28BE is electrically connected to the coil connection portion 28AS through an opening formed in the insulating layer 64 and the insulating film 65.

  In the present embodiment, the second coil 29 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the first layer 28 </ b> A and the second layer 28 </ b> B of the first coil 28 passes through the first coupling portion 41 and the main magnetic pole 15. The magnetic flux corresponding to the magnetic field generated by the first layer 29A and the second layer 29B of the second coil 29 is the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Pass through. Other configurations, operations, and effects in the present embodiment are the same as those in the second or fourth embodiment.

[Ninth Embodiment]
Next, with reference to FIGS. 22 and 23, a magnetic head according to a ninth embodiment of the invention will be described. FIG. 22 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 22 shows the main cross section. FIG. 23 is a plan view showing a second coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the sixth embodiment in the following points. In the present embodiment, the recording head unit 9 has the first coil 23 in the third embodiment instead of the first coil 21 in the sixth embodiment. The coil connection portion 23E (see FIG. 10) of the first coil 23 is electrically connected to the coil connection portion 27S of the second coil 27 through an opening formed in the insulating film 62. As shown in FIG. 23, in the present embodiment, the coil connection portion 27E of the second coil 27 is arranged at a position different from the position shown in FIG. 16 in the sixth embodiment. . The magnetic head according to the present embodiment includes the insulating layer 69 described in the third embodiment.

  Other configurations, operations, and effects in the present embodiment are the same as those in the third or sixth embodiment.

[Tenth embodiment]
Next, with reference to FIGS. 24 to 26, a magnetic head according to a tenth embodiment of the invention will be described. FIG. 24 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 24 shows the main cross section. FIG. 25 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 26 is a plan view showing first and third coils in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the first embodiment in the following points. In the present embodiment, the recording head unit 9 includes a first coil 121, a second coil 111, and a third coil, instead of the first coil 21 and the second coil 11 in the first embodiment. 122 is provided. The first coil 121, the second coil 111, and the third coil 122 are made of a conductive material such as copper. The first coil 121, the second coil 111, and the third coil 122 are connected in series or in parallel. The main magnetic pole 15 passes a magnetic flux corresponding to the magnetic field generated by the first coil 121, the second coil 111, and the third coil 122. The lead layers 10 and 20 are used to energize the first coil 121, the second coil 111, and the third coil 122.

  The first coil 121 is continuous with the lead layer 20. The first coil 121 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 121 is connected to the first connecting portion 41 (magnetic layer 42) and the second connecting portion 31. It passes between (magnetic layer 36). The third coil 122 is continuous with the first coil 121 and is wound around the second coupling portion 31 (magnetic layer 36). In FIG. 26, the boundaries of the first coil 121, the third coil 122, and the lead layer 20 are indicated by dotted lines.

  The insulating film 62 is provided in contact with the surfaces other than the upper surfaces of the first coil 121, the third coil 122, and the lead layer 20. The insulating layer 63 is disposed around the first coil 121, the third coil 122, the lead layer 20, the first shield 16 </ b> A, and the magnetic layer 36. The top surfaces of the first coil 121, the third coil 122, the lead layer 20, the first shield 16A, the magnetic layers 36 and 42, the insulating film 62, and the insulating layer 63 are flattened. The insulating layer 64 is disposed on the top surfaces of the first coil 121, the third coil 122, the lead layer 20, and the insulating film 62.

  Next, the first coil 121, the second coil 111, and the third coil 122 will be described in detail with reference to FIG. 24, FIG. 25, and FIG. As shown in FIG. 24, the second coil 111 is disposed behind the main magnetic pole 15 in the traveling direction T of the recording medium. As shown in FIG. 25, the second coil 111 is wound around the second coupling portion 31 (magnetic layer 32). In the example shown in FIG. 25, the second coil 111 is wound about the second coupling portion 31 (magnetic layer 32) about three times. The second coil 111 has a coil connection part 111 </ b> S that is electrically connected to the third coil 122. When viewed from above, the second coil 111 is wound in a clockwise direction from the coil connecting portion 111S toward the boundary with the lead layer 10.

  As shown in FIG. 26, the first coil 121 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 121 is connected to the first connecting portion 41 (magnetic layer 42). It passes between the second coupling parts 31 (magnetic layer 36). In the example shown in FIG. 26, the first coil 121 is wound about the first coupling portion 41 (magnetic layer 42) about once.

  As shown in FIG. 24, the second coil 111 and the third coil 122 are arranged at different positions in the traveling direction T of the recording medium. In the present embodiment, in particular, the third coil 122 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. In addition, as described above, the third coil 122 is continuous with the first coil 121 and is wound around the second coupling portion 31 (magnetic layer 36). In the example shown in FIG. 26, the third coil 122 is wound around the second coupling portion 31 (magnetic layer 36) about once.

  In addition, the third coil 122 has a coil connection part 122 </ b> E that is electrically connected to the coil connection part 111 </ b> S of the second coil 111. The coil connection part 122E is electrically connected to the coil connection part 111S via a columnar connection layer (not shown) that penetrates a plurality of layers between the third coil 122 and the second coil 111. The connection layer is made of a conductive material such as copper.

  When viewed from above, the first coil 121 is wound counterclockwise from the boundary with the lead layer 20 toward the boundary with the third coil 122. As viewed from above, the third coil 122 is wound clockwise from the boundary with the first coil 121 toward the coil connection portion 122E.

  In the example shown in FIGS. 25 and 26, the first coil 121, the third coil 122, and the second coil 111 are connected in series in this order.

  Next, functions and effects of the magnetic head according to the present embodiment will be described. In the recording head unit 9, the first coil 121, the second coil 111, and the third coil 122 generate a magnetic field according to information to be recorded on the recording medium. The magnetic flux corresponding to the magnetic field generated by the first coil 121 passes through the first connecting portion 41 and the main magnetic pole 15. The magnetic flux corresponding to the magnetic field generated by the second coil 111 and the third coil 122 passes through the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Therefore, the main magnetic pole 15 corresponds to the magnetic flux corresponding to the magnetic field generated by the first coil 121, the magnetic flux corresponding to the magnetic field generated by the second coil 111, and the magnetic field generated by the third coil 122. Pass magnetic flux.

  Note that the first coil 121, the second coil 111, and the third coil 122 may be connected in series or may be connected in parallel. In any case, in the main magnetic pole 15, the magnetic flux corresponding to the magnetic field generated by the first coil 121, the magnetic flux corresponding to the magnetic field generated by the second coil 111, and the third coil 122 The first coil 121, the second coil 111, and the third coil 122 are connected so that the magnetic flux corresponding to the magnetic field flows in the same direction.

  The main magnetic pole 15 passes the magnetic flux corresponding to the magnetic field generated by the first coil 121, the second coil 111, and the third coil 122 as described above, and information is recorded on the recording medium by the perpendicular magnetic recording method. A recording magnetic field for recording is generated.

  In the present embodiment, in addition to the first magnetic path and the first coil 121, a second magnetic path, a second coil 111, and a third coil 122 are provided. Thus, even if the number of turns of the first coil 121 is reduced and the length of the first magnetic path is shortened, the magnetomotive force of the first coil 121, the magnetomotive force of the second coil 111, and the third The magnetomotive force of the coil 122 can generate a sufficiently large recording magnetic field from the main magnetic pole 15.

  In the present embodiment, in particular, the number of turns of the second coil 111 is about 3, the number of turns of the third coil 122 is about 1, and the number of turns of the first coil 121 is about 1. It is. Here, consider a comparative magnetic head in which the second coil 111 and the third coil 122 are not provided, and the first coil 121 has five turns. Other configurations of the magnetic head of the comparative example are the same as those of the magnetic head according to the present embodiment. The total magnetomotive force by the first coil 121, the second coil 111, and the third coil 122 in the present embodiment is substantially equal to the magnetomotive force by the first coil 121 in the magnetic head of the comparative example. On the other hand, in this embodiment, since the number of turns of the first coil 121 is smaller than that of the magnetic head of the comparative example, the length of the first magnetic path can be shortened. In this manner, according to the present embodiment, the magnitude of the recording magnetic field generated from the main magnetic pole 15 is made equal to that of the magnetic head of the comparative example, while the first magnetic path of the comparative magnetic head is made. The length can be shortened.

  In the present embodiment, the number of turns of the second coil 111 and the number of turns of the third coil 122 can be increased without being restricted by the number of turns of the first coil 121. The number of turns of the second coil 111 and the number of turns of the third coil 122 may be equal to or greater than the number of turns of the first coil 121. Alternatively, the number of turns of the second coil 111 may be greater than the number of turns of the first coil 121, and the number of turns of the third coil 122 may be greater than or equal to the number of turns of the first coil 121. Then, by increasing the number of turns of the second coil 111 and the number of turns of the third coil 122 in this way, the magnetomotive force by the second coil 111 and the magnetomotive force by the third coil 122 can be increased. It becomes possible.

  In particular, in the present embodiment, the second connecting portion 31 is disposed at a position farther from the medium facing surface 80 than the first connecting portion 41. Thereby, the number of turns of the second and third coils 111 and 122 wound around the second connecting portion 31 can be easily increased.

  In the present embodiment, the second coil 111 is disposed on the rear side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. Therefore, the second coil 111 can be arranged without being restricted by the arrangement of the first coil 121. Thereby, the number of turns of the second coil 111 can be easily increased.

  In the present embodiment, the second and third coils 111 and 122 are arranged at different positions in the traveling direction T of the recording medium. Thereby, the number of turns of each of the second and third coils 111 and 122 can be increased.

  From the above, according to the present embodiment, the length of the first magnetic path disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15 is shortened, and sufficient from the main magnetic pole 15. A recording magnetic field having a magnitude can be generated.

  Other configurations, operations, and effects in the present embodiment are the same as those in the first embodiment.

[Eleventh embodiment]
Next, a magnetic head according to the eleventh embodiment of the present invention will be described with reference to FIGS. FIG. 27 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 27 shows the main cross section. FIG. 28 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 29 is a plan view showing a third coil in the magnetic head according to the present embodiment. FIG. 30 is a plan view showing a first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the tenth embodiment in the following points. In the present embodiment, the recording head unit 9 has a first coil 123 and a third coil 124 instead of the first coil 121 and the third coil 122 in the tenth embodiment. . Here, a virtual plane that intersects with the end face of the main pole 15 disposed on the medium facing surface 80 and is perpendicular to the traveling direction T of the recording medium is assumed. The third coil 124 is disposed at a position that intersects the virtual plane. Both the first and third coils 123 and 124 are made of a conductive material such as copper.

  As shown in FIG. 29, the third coil 124 is wound around the second coupling portion 31 (magnetic layer 35). In the example shown in FIG. 29, the third coil 124 is wound about once around the second coupling portion 31 (magnetic layer 35).

  The third coil 124 includes a coil connection portion 124S electrically connected to the first coil 123 and a coil connection portion 124E electrically connected to the coil connection portion 111S of the second coil 111. Have. As viewed from above, the third coil 124 is wound clockwise from the coil connection portion 124S toward the coil connection portion 124E. The coil connection part 124E is electrically connected to the coil connection part 111S of the second coil 111 through the connection layer described in the tenth embodiment. As shown in FIG. 28, in the present embodiment, coil connecting portion 111S is arranged at a position different from the position shown in FIG. 25 in the tenth embodiment.

  A nonmagnetic layer 61 is disposed around the third coil 124. In addition, the magnetic head according to the present embodiment has an insulating film made of an insulating material interposed between the third coil 124 and the main magnetic pole 15, the second gap layer 18, the magnetic layer 35, and the nonmagnetic layer 57. 60. The insulating film 60 is made of alumina, for example.

  The positional relationship of the first coil 123 with respect to the lead layer 20, the first coupling portion 41 (magnetic layer 42), and the second coupling portion 31 (magnetic layer 36) is the first coil in the tenth embodiment. The same as 121. That is, the first coil 123 is continuous with the lead layer 20. In FIG. 30, the boundary between the first coil 123 and the lead layer 20 is indicated by a dotted line. The first coil 123 is wound around the first connecting portion 41 (magnetic layer 42), and a part of the first coil 123 is connected to the first connecting portion 41 (magnetic layer 42) and the second connecting portion 31. It passes between (magnetic layer 36). In the example shown in FIG. 30, the first coil 123 is wound around the first coupling portion 41 (magnetic layer 42) about once. The first coil 123 has a coil connection portion 123E that is electrically connected to the coil connection portion 124S of the third coil 124. When viewed from above, the first coil 123 is wound counterclockwise from the boundary with the lead layer 20 toward the coil connection portion 123E.

  An insulating film 62 is interposed between the first coil 123 and the third coil 124. The insulating film 62 is formed with an opening that exposes the coil connection portion 124 </ b> S of the third coil 124. The coil connection portion 123E of the first coil 123 is electrically connected to the coil connection portion 124S through an opening formed in the insulating film 62.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the first coil 123 passes through the first connecting portion 41 and the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the third coil 124 passes through the second connecting portion 31, the second yoke layer 40, the first connecting portion 41, and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the tenth embodiment.

[Twelfth embodiment]
Next, with reference to FIGS. 31 to 33, a magnetic head according to a twelfth embodiment of the present invention is described. FIG. 31 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 31 shows the main cross section. FIG. 32 is a plan view showing a third coil in the magnetic head according to the present embodiment. FIG. 33 is a plan view showing a first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the eleventh embodiment in the following points. In the present embodiment, the recording head unit 9 has a third coil 125 instead of the third coil 124 in the eleventh embodiment. The third coil 125 is made of a conductive material such as copper.

  The positional relationship of the third coil 125 with respect to the main magnetic pole 15 and the second coupling portion 31 (magnetic layer 35) is the same as that of the third coil 124 in the eleventh embodiment. That is, the third coil 125 is arranged at a position that intersects the virtual plane described in the eleventh embodiment. The third coil 125 is wound around the second coupling portion 31 (magnetic layer 35). In the example shown in FIG. 32, the third coil 125 is wound about twice around the second coupling portion 31 (magnetic layer 35). A nonmagnetic layer 61 is disposed between and around the third coil 125.

  The third coil 125 includes a coil connection part 125S electrically connected to the coil connection part 123E of the first coil 123 and a coil electrically connected to the coil connection part 111S of the second coil 111. And a connecting portion 125E. As viewed from above, the third coil 125 is wound in the clockwise direction from the coil connection portion 125S toward the coil connection portion 125E.

  An insulating film 62 is interposed between the first coil 123 and the third coil 125. The insulating film 62 is formed with an opening that exposes the coil connection part 125S of the third coil 125. The coil connection portion 123E is electrically connected to the coil connection portion 125S through an opening formed in the insulating film 62. As shown in FIG. 33, in this embodiment, the coil connection portion 123E is arranged at a position different from the position shown in FIG. 30 in the eleventh embodiment.

  The coil connection part 125E is electrically connected to the coil connection part 111S through the connection layer described in the tenth embodiment. In the present embodiment, the coil connection portion 111S is disposed at the position shown in FIG. 25 in the tenth embodiment.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the third coil 125 passes through the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the eleventh embodiment.

[Thirteenth embodiment]
Next, a magnetic head according to a thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 34 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 34 shows the main cross section.

  The magnetic head according to the present embodiment is different from the magnetic head according to the eleventh embodiment in the following points. In the present embodiment, the recording head unit 9 has the first coil 121 in the tenth embodiment instead of the first coil 123 in the eleventh embodiment. The recording head unit 9 has a third coil having a first layer 124A and a second layer 122B instead of the third coil 124 in the eleventh embodiment. The shape and arrangement of the first layer 124A are the same as those of the third coil 124 in the eleventh embodiment. The shape and arrangement of the second layer 122B are the same as those of the third coil 122 in the tenth embodiment. In the present embodiment, the first layer 124A that is a part of the third coil is disposed at a position that intersects the virtual plane described in the eleventh embodiment.

  The third coil has coil connection portions 124S and 124E (see FIG. 29) provided in the first layer 124A and a coil connection portion 122E (see FIG. 26) provided in the second layer 122B. ing. The coil connection part 122E is electrically connected to the coil connection part 124S through an opening formed in the insulating film 62. The coil connection portion 124E is electrically connected to the coil connection portion 111S (see FIG. 28) of the second coil 111 via the connection layer described in the eleventh embodiment (tenth embodiment). Yes.

  In the present embodiment, the magnetic flux corresponding to the magnetic field generated by the first layer 124A and the second layer 122B of the third coil is generated by the second coupling part 31, the second yoke layer 40, and the first coupling part. 41 and the main magnetic pole 15. Other configurations, operations, and effects in the present embodiment are the same as those in the tenth or eleventh embodiment.

[Fourteenth embodiment]
Next, with reference to FIGS. 35 to 38, a magnetic head according to a fourteenth embodiment of the invention will be described. FIG. 35 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 35 shows the main cross section. FIG. 36 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 37 is a plan view showing the first layer of the first coil and the first layer of the third coil in the magnetic head according to the present embodiment. FIG. 38 is a plan view showing the second layer of the first coil and the second layer of the third coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the tenth embodiment in the following points. In the present embodiment, the recording head unit 9 has a second coil 112 instead of the second coil 111 in the tenth embodiment. The second coil 112 is made of a conductive material such as copper.

  The positional relationship of the second coil 112 with respect to the main magnetic pole 15, the second coupling portion 31 (magnetic layer 32), and the lead layer 10 is the same as that of the second coil 111 in the tenth embodiment. That is, the second coil 112 is disposed behind the main magnetic pole 15 in the traveling direction T of the recording medium, and is wound around the second coupling portion 31 (magnetic layer 32). In the example shown in FIG. 36, the second coil 112 is wound about the second coupling portion 31 (magnetic layer 32) about twice. The lead layer 10 is continuous with the second coil 112. In FIG. 36, the boundary between the second coil 112 and the lead layer 10 is indicated by a dotted line. The second coil 112 has a coil connection portion 112S that is electrically connected to a first layer of a third coil to be described later. As viewed from above, the second coil 112 is wound in the clockwise direction from the coil connecting portion 112S toward the boundary with the lead layer 10.

  In the present embodiment, the first coupling portion 41 includes a magnetic layer 43 disposed on the magnetic layer 42 in addition to the magnetic layer 42. In addition to the magnetic layers 32 to 36, the second coupling portion 31 includes a magnetic layer 37 disposed on the magnetic layer 36. In addition, the recording head unit 9 has a magnetic layer 44 made of a magnetic material laminated on the first shield 16A. The magnetic layer 44 has an end surface facing the medium facing surface 80, and this end surface is disposed at a position away from the medium facing surface 80. The distance from the medium facing surface 80 at an arbitrary position on the end surface of the magnetic layer 44 increases as the arbitrary position moves away from the upper surface 1 a of the substrate 1. As the material of the magnetic layer 44, for example, any one of CoFeN, CoNiFe, NiFe, and CoFe can be used.

  Further, in the present embodiment, the recording head unit 9 has a first coil 126 and a third coil 127 instead of the first coil 121 and the third coil 122 in the tenth embodiment. ing. The first coil 126 has a first layer 126A and a second layer 126B. The third coil 127 has a first layer 127A and a second layer 127B. Both the first and third coils 126 and 127 are made of a conductive material such as copper.

  FIG. 37 is a plan view showing the first layer 126A of the first coil 126 and the first layer 127A of the third coil 127. FIG. The first layers 126A and 127A are located on the same plane and are continuous with each other. In FIG. 37, the boundary between the first layers 126A and 127A is indicated by a dotted line.

  The positional relationship of the first layer 126A with respect to the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 (magnetic layer 36) is the same as that of the first coil 121 in the tenth embodiment. . That is, the first layer 126A is wound around the first coupling portion 41 (magnetic layer 42), and a part thereof is the first coupling portion 41 (magnetic layer 42) and the second coupling portion 31 ( It passes between the magnetic layer 36). In the example shown in FIG. 37, the first layer 126A is wound about the first coupling portion 41 (magnetic layer 42) about once. Further, the first coil 126 has a coil connection portion 126AS provided in the first layer 126A.

  The positional relationship of the first layer 127A with respect to the second coupling portion 31 (magnetic layer 36) is the same as that of the third coil 122 in the tenth embodiment. That is, the first layer 127A is wound around the second coupling portion 31 (magnetic layer 36). In the example shown in FIG. 37, the first layer 127A is wound about once around the second coupling portion 31 (magnetic layer 36). The third coil 127 has a coil connection part 127AE provided in the first layer 127A. The coil connection part 127AE is electrically connected to the coil connection part 112S of the second coil 112 through the connection layer described in the tenth embodiment.

  When viewed from above, the first layer 126A is wound in the counterclockwise direction from the coil connection portion 126AS toward the boundary with the first layer 127A. When viewed from above, the first layer 127A is wound clockwise from the boundary with the first layer 126A toward the coil connection portion 127AE. An insulating layer 63 is disposed between and around the windings of the first layers 126A and 127A.

  38 is a plan view showing the second layer 126B of the first coil 126 and the second layer 127B of the third coil 127. FIG. The second layers 126B and 127B and the lead layer 20 are located on the same plane and are continuous with each other. In FIG. 38, the boundaries between the second layers 126B and 127B and the lead layer 20 are indicated by dotted lines.

  The second layer 127B is wound around the second coupling portion 31 (magnetic layer 37). In the example shown in FIG. 38, the second layer 127B is wound about the second coupling portion 31 (magnetic layer 37) about once.

  The second layer 126B is wound around the first coupling portion 41 (magnetic layer 43), and a part of the second layer 126B is coupled to the first coupling portion 41 (magnetic layer 43) and the second coupling portion 31 (magnetic layer). 37). In the example shown in FIG. 38, the second layer 126B is wound about the first coupling portion 41 (magnetic layer 43) about once. Further, the first coil 126 has a coil connection portion 126BE provided in the second layer 126B.

  When viewed from above, the second layer 127B is wound clockwise from the boundary with the lead layer 20 toward the boundary with the second layer 126B. As viewed from above, the second layer 126B is wound counterclockwise from the boundary with the second layer 127B toward the coil connection portion 126BE.

  The magnetic head according to the present embodiment further includes an insulating film 65 and insulating layers 66 and 67 made of an insulating material. The insulating film 65 is interposed between the second layers 126B and 127B and the lead layer 20 and the magnetic layers 37, 43 and 44 and the insulating layer 64. The insulating layer 66 is disposed around the second layers 126B and 127B, the lead layer 20, and the magnetic layers 37 and 44. The upper surfaces of the second layers 126B and 127B, the lead layer 20, the magnetic layers 37, 43, and 44, the insulating film 65, and the insulating layer 66 are flattened. The insulating layer 67 is disposed on the upper surfaces of the second layers 126B and 127B, the lead layer 20, and the insulating film 65. The insulating film 65 and the insulating layers 66 and 67 are made of alumina, for example.

  An insulating layer 64 and an insulating film 65 are interposed between the first layer 126A and the second layer 126B. The insulating layer 64 and the insulating film 65 are formed with openings that expose the coil connection portions 126AS provided in the first layer 126A. The coil connection portion 126BE provided in the second layer 126B is electrically connected to the coil connection portion 126AS through an opening formed in the insulating layer 64 and the insulating film 65.

  In the present embodiment, the second yoke layer 40 is disposed on the magnetic layers 37, 43, 44 and the insulating layer 67. The first coupling portion 41 (magnetic layers 42, 43) magnetically couples the main magnetic pole 15 and the second yoke layer 40. The second coupling portion 31 (magnetic layers 32 to 37) magnetically couples the first yoke layer 30 and the second yoke layer 40. The magnetic layer 44 magnetically couples the first shield 16 </ b> A of the recording shield 16 and the second yoke layer 40.

  In the present embodiment, the third coil 127 is disposed on the front side in the traveling direction T of the recording medium with respect to the main magnetic pole 15. A magnetic flux corresponding to the magnetic field generated by the first layer 126 </ b> A and the second layer 126 </ b> B of the first coil 126 passes through the first coupling portion 41 and the main magnetic pole 15. The magnetic flux corresponding to the magnetic field generated by the first layer 127A and the second layer 127B of the third coil 127 is the second coupling portion 31, the second yoke layer 40, the first coupling portion 41, and the main magnetic pole 15. Pass through. Other configurations, operations, and effects in the present embodiment are the same as those in the tenth embodiment.

[Fifteenth embodiment]
Next, with reference to FIGS. 39 to 42, a magnetic head according to a fifteenth embodiment of the invention will be described. FIG. 39 is a cross-sectional view showing the magnetic head according to the present embodiment. FIG. 39 shows the main cross section. FIG. 40 is a plan view showing a second coil in the magnetic head according to the present embodiment. FIG. 41 is a plan view showing a third coil in the magnetic head according to the present embodiment. FIG. 42 is a plan view showing a first coil in the magnetic head according to the present embodiment.

  The magnetic head according to the present embodiment is different from the magnetic head according to the twelfth embodiment in the following points. In the present embodiment, the recording head unit 9 has a first coil 128 and a second coil 113 instead of the first coil 123 and the second coil 111 in the twelfth embodiment. . The first coil 128 and the second coil 113 are made of a conductive material such as copper.

  The positional relationship of the second coil 113 with respect to the main magnetic pole 15, the second coupling portion 31 (magnetic layer 32), and the lead layer 10 is the same as that of the second coil 111 in the twelfth embodiment. That is, the second coil 113 is disposed on the rear side in the traveling direction T of the recording medium with respect to the main magnetic pole 15 and is wound around the second coupling portion 31 (magnetic layer 32). In the example shown in FIG. 40, the second coil 113 is wound about the second coupling portion 31 (magnetic layer 32) about four times. The lead layer 10 is continuous with the second coil 113. In FIG. 40, the boundary between the second coil 113 and the lead layer 10 is indicated by a dotted line.

  The second coil 113 has a coil connection portion 113 </ b> S that is electrically connected to the coil connection portion 125 </ b> E of the third coil 125. As viewed from above, the second coil 113 is wound in the clockwise direction from the coil connecting portion 113S toward the boundary with the lead layer 10. The coil connection part 125E is electrically connected to the coil connection part 113S through the connection layer described in the twelfth embodiment (tenth embodiment).

  The positional relationship of the first coil 128 with respect to the lead layer 20, the first coupling portion 41 (magnetic layer 42), and the second coupling portion 31 (magnetic layer 36) is the first coil in the twelfth embodiment. 123. That is, the first coil 128 is wound around the first connecting portion 41 (magnetic layer 42), and a part thereof is the first connecting portion 41 (magnetic layer 42) and the second connecting portion 31. It passes between (magnetic layer 36). The lead layer 20 is continuous with the first coil 128. In FIG. 42, the boundary between the first coil 128 and the lead layer 20 is indicated by a dotted line. In the example shown in FIG. 42, the first coil 128 is wound about the first coupling portion 41 (magnetic layer 42) about twice.

  In addition, the first coil 128 has a coil connection part 128 </ b> E electrically connected to the coil connection part 125 </ b> S of the third coil 125. When viewed from above, the first coil 128 is wound counterclockwise from the boundary with the lead layer 20 toward the coil connection portion 128E. In addition, the magnetic head according to the present embodiment includes an insulating layer 69 made of an insulating material and disposed between the windings of the first coil 128. The insulating layer 69 is made of, for example, a photoresist.

  An insulating film 62 is interposed between the first coil 128 and the third coil 125. The insulating film 62 is formed with an opening that exposes the coil connection part 125S of the third coil 125. The coil connection portion 128E of the first coil 128 is electrically connected to the coil connection portion 125S through an opening formed in the insulating film 62. As shown in FIG. 41, in the present embodiment, coil connecting portion 125S is arranged at a position different from the position shown in FIG. 32 in the twelfth embodiment.

  Other configurations, operations, and effects in the present embodiment are the same as those in the twelfth embodiment.

  In addition, this invention is not limited to said each embodiment, A various change is possible. For example, the second connecting portion 31 may be disposed on at least one of both sides in the track width direction with respect to the first connecting portion 41.

  Each of the first coils is wound around the first connecting portion, and three or more layers are laminated so that a part of the first coil passes between the first connecting portion and the second connecting portion. It may be.

  DESCRIPTION OF SYMBOLS 11 ... 2nd coil, 15 ... Main pole, 16 ... Recording shield, 21 ... 1st coil, 30 ... 1st yoke layer, 31 ... 2nd connection part, 40 ... 2nd yoke layer, 41 ... 1st connection part.

Claims (14)

A medium facing surface facing the recording medium;
First and second coils for generating a magnetic field according to information to be recorded on the recording medium;
An end face disposed on the medium facing surface, for passing a magnetic flux corresponding to the magnetic field generated by the first and second coils, and for recording the information on the recording medium by a perpendicular magnetic recording method; A main magnetic pole for generating a recording magnetic field of
A recording shield made of a magnetic material and having an end face disposed on the medium facing surface;
A gap portion made of a non-magnetic material and disposed between the main magnetic pole and the recording shield;
A first yoke layer made of a magnetic material and magnetically connected to the recording shield and disposed on the rear side in the traveling direction of the recording medium with respect to the main pole;
A second yoke layer made of a magnetic material and magnetically connected to the recording shield and disposed on the front side in the traveling direction of the recording medium with respect to the main pole;
A first connecting portion disposed at a position away from the medium facing surface and magnetically connecting the main magnetic pole and the second yoke layer;
Perpendicular magnetism provided with a second coupling portion that is disposed at a position away from the medium facing surface and magnetically couples the first yoke layer and the second yoke layer without contacting the main magnetic pole. A magnetic head for recording,
The end face of the recording shield includes a first end face portion disposed on the front side in the traveling direction of the recording medium with respect to the end face of the main magnetic pole,
The first coil is wound around the first connecting portion, and a part of the first coil passes between the first connecting portion and the second connecting portion,
The magnetic head for perpendicular magnetic recording, wherein the second coil is wound around the second connecting portion.   2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the second connecting portion is disposed farther from the medium facing surface than the first connecting portion.   2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the second coil is disposed on the rear side in the traveling direction of the recording medium with respect to the main magnetic pole.   2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the second coil is disposed on the front side in the traveling direction of the recording medium with respect to the main magnetic pole.   Assuming a virtual plane that intersects with the end face of the main pole disposed on the medium facing surface and is perpendicular to the traveling direction of the recording medium, at least a part of the second coil is 2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the magnetic head is disposed at an intersecting position.   2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the number of turns of the second coil is equal to or greater than the number of turns of the first coil.   2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the number of turns of the second coil is larger than the number of turns of the first coil.   The end surface of the recording shield further includes second, third, and fourth end surface portions, and the second end surface portion is located behind the end surface of the main pole in the traveling direction of the recording medium. 2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the third and fourth end face portions are arranged on both sides in the track width direction with respect to the end face of the main magnetic pole. And a third coil for generating a magnetic field according to information recorded on the recording medium,
The main pole passes a magnetic flux corresponding to the magnetic field generated by the first, second and third coils;
The third coil is wound around the second connecting portion;
2. The magnetic head for perpendicular magnetic recording according to claim 1, wherein the second and third coils are arranged at different positions in the traveling direction of the recording medium.   10. The magnetic head for perpendicular magnetic recording according to claim 9, wherein the second coil is disposed on the rear side in the traveling direction of the recording medium with respect to the main magnetic pole.   11. The magnetic head for perpendicular magnetic recording according to claim 10, wherein the third coil is disposed on the front side in the traveling direction of the recording medium with respect to the main magnetic pole.   Assuming a virtual plane that intersects with the end face of the main magnetic pole disposed on the medium facing surface and is perpendicular to the traveling direction of the recording medium, at least a part of the third coil includes the virtual plane. 11. The magnetic head for perpendicular magnetic recording according to claim 10, wherein the magnetic head is arranged at an intersecting position.   10. The magnetic head for perpendicular magnetic recording according to claim 9, wherein the number of turns of the second coil and the number of turns of the third coil are equal to or greater than the number of turns of the first coil.   The number of turns of the second coil is greater than the number of turns of the first coil, and the number of turns of the third coil is equal to or greater than the number of turns of the first coil. 9. A magnetic head for perpendicular magnetic recording according to 9.

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