JP3214357B2 - Magnetic head support mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk storage device for magnetically recording and reproducing information, and more particularly to a high-speed, high-density, and high-reliability magnetic disk device with improved gimbal strength.

[0002]

2. Description of the Related Art A typical example of a head support mechanism of a magnetic disk drive conventionally used in practice is disclosed in Japanese Patent Application Laid-Open No. 55-222.
No. 96. The slider on which the magnetic head is mounted has the entire area where the tongue of the gimbal contacts, fixed with an adhesive or the like. The gimbal has a flexible structure in the direction perpendicular to the disk surface so that the slider can follow the disk surface. The gimbal is provided with a protrusion called a dimple, and the slider can easily rotate with the vertex of the dimple as a fulcrum. The load arm includes a rigid body for holding the gimbal and a spring for applying a necessary load to the slider via the dimple.

[0003] In an example of a magnetic head supporting apparatus for a floppy disk described in Japanese Patent Application Laid-Open No. 58-43826, a movable base rotatably supported on a fixed base is provided, and the fixed base and the movable base are combined. A gimbal is attached to the tip, and the upper surface of the magnetic head is fixed to the center of the gimbal with an adhesive or the like.
Further, a support pin for supporting the center of the back surface of the gimbal for suppressing a fluctuation of the magnetic head in a direction perpendicular to the disk surface and applying a necessary load to the slider is provided.

In the example described in Japanese Patent Application Laid-Open No. 1-179287, a gimbal is constituted by four arms formed radially. The head support mechanism is configured by fixing the tips of two arms that are not adjacent to each other to the slider and fixing the tips of the remaining two arms to the load arm. In addition, a spacer is provided between the gimbal and the slider, or a groove is dug in the gimbal mounting surface of the slider to ensure the degree of freedom of the slider.

In the example of the magnetic head supporting device described in Japanese Patent Application Laid-Open No. 5-303856, the gimbal has a central rectangular portion for fixing the magnetic head and an annular flexible portion surrounding the central rectangular portion with a pair of opposed inner arms. An annular flexible portion and an outer holding portion surrounding the annular flexible portion are formed in a direction perpendicular to the inner arm portion.
One pair of sides of the annular flexible portion, which is constituted by a pair of opposing outer arm portions and is connected to the outer arm portion or the inner arm portion, is divided into two at the connection point with the inner / outer arm portion, and the other is the other. The shorter side is formed thinner or thinner than the longer side. Alternatively, the inner and outer arms on the shorter side are formed thinner or thinner than the inner and outer arms on the longer side. Thus, the rigidity of the short side and the rigidity of the long side are balanced, and the center square portion can be easily rotated around a straight line connecting the respective sets of the inner and outer arms.

In another example of the magnetic head supporting device described in Japanese Patent Application Laid-Open No. 5-303856, a portion connecting the inner and outer arms of the annular flexible portion is not adjacent to the inner and outer arms of the annular flexible portion. By forming wider or thicker than the part,
The strength against loads parallel to the disk surface is increased. Alternatively, the outer arm portion is made parallel to the track direction and wider than the inner arm portion, thereby improving impact resistance.

In the magnetic head described in Japanese Patent Application Laid-Open No. 6-309641, an acrylic adhesive is used as an adhesive for bonding the head chip to which the winding is applied to the base base, between the base base and the head chip. Using a reducing agent consisting of a condensate of an amine and an aldehyde or a metal soap and a reducing agent of an acrylic adhesive previously applied to the head chip to decompose the peroxide compound catalyst in the adhesive,
Thereby, the reactive components are radically polymerized to exert the adhesive performance of the adhesive. According to this method, the number of bonding steps involved in reinforcing the adhesive is reduced while securing sufficient bonding strength between the base base and the head chip.

[0008]

Problems to be Solved by the Invention Japanese Patent Application Laid-Open No. 55-2229
In the head support mechanism disclosed in Japanese Patent Application Laid-Open No. 6-206, the entire area of the slider where the tongue of the gimbal contacts is fixed with an adhesive or the like. For this reason, the initial deformation of the tongue of the gimbal, or the warpage or torsion caused by stress, load, disturbance or the like at the time of bonding deforms the slider, resulting in warpage or torsion of the slider floating surface, and the flying height of the slider varies. I will.
Conversely, the initial warpage and torsion of the slider, warpage and torsion due to stress at the time of bonding, load, disturbance, etc. affect the tongue of the gimbal, resulting in variations in the initial attitude angle of the slider. I will. If the flying height of the slider is lower than the design value, there is a risk of contact between the slider and the disk and data may be damaged.Therefore, it is not possible to sufficiently lower the flying height to increase the recording density. Therefore, a large-capacity magnetic disk drive cannot be realized. The slider at the tip is pressed against the disk surface by the load arm via the dimple. However, when the gimbal is deformed in the in-plane direction of the disk during a seek or runaway, the dimple slips, and the slip force is generated by the frictional force generated in the dimple, which may cause a displacement between the slider and the tip of the load arm. . As a result, each head of the plurality of head support mechanisms is misaligned, and the positioning accuracy is reduced in the servo surface servo method, and it is necessary to reposition the plurality of heads in the data surface servo method. A time delay occurs.

In the magnetic head supporting device disclosed in Japanese Patent Application Laid-Open No. 58-43826, since the slider is fixed using the entire upper surface, the flying height variation due to the mutual deformation of the warp and torsion of the gimbal and the slider occurs. However, a large-capacity magnetic disk drive cannot be realized. further,
Since the support pin and the gimbal are in contact with each other, when the gimbal is deformed, the head position shifts due to frictional force as in the case of JP-A-55-22296. One floppy disk and a maximum of two magnetic heads
Since there is only one unit, even if the head position is shifted, there is no significant delay in the access time, but this is a major problem in a magnetic disk device in which a plurality of disks are mounted and ten or more magnetic heads are mounted.

In the head support mechanism disclosed in Japanese Patent Application Laid-Open No. 1-179287, in addition to the effects of warpage and torsion as in the above-mentioned known example, the slider mounting surface of the gimbal is divided into two places. Due to the pressing load on the slider, two slider mounting surfaces are pulled, and warpage of the slider flying surface is likely to occur. Torsion between the slider mounting surfaces is particularly susceptible. Further, since there is no dimple in the sliding portion, the above-described head position shift does not occur, but on the contrary, since there is no attenuation due to friction, the vibration amplitude increases, and it is difficult to improve the positioning accuracy.

In the magnetic head supporting device described in Japanese Patent Application Laid-Open No. 5-303856, the aforementioned head displacement does not occur because there is no dimple, but the shorter side of the annular flexible portion is made thinner or thinner. In the example, when a force parallel to the disk surface acts on the central rectangular portion, stress concentrates on the thin or thin portion, and the possibility of deformation or breakage increases. The deformation of the gimbal causes a head displacement and a change in the flying attitude and the flying height of the slider, and the destruction causes a serious obstacle of data loss due to disk damage.

In another example of the magnetic head supporting device described in Japanese Patent Application Laid-Open No. 5-303856, the above-mentioned stress concentration of the annular flexible portion is taken into account, but the stress concentration of the inner arm portion is not taken. Although an example is shown in which the width of the inner arm connected to the short side of the annular flexible portion is increased, in this example, the rigidity of the gimbal against rotation of the slider about the pair of inner arms increases, The flying height of the slider varies.

In the example of the magnetic head described in JP-A-6-309641, the reaction between the adhesive and the reducing agent is expected to occur mainly between the head chip and the adhesive.
For this reason, the strength against peeling between the head chip and the adhesive is improved, but improvement in the peel strength between the base base and the adhesive cannot be expected. In the bonding between the bonding portion of the support mechanism and the slider, which is seen in the magnetic head support mechanism used in the magnetic disk drive head, the separation between the bonding portion of the magnetic head support mechanism and the slider cannot be ignored. Also,
In order to reduce the flying height of the slider due to the increase in recording density, the size of the slider has been reduced to 2 mm length called a 50% slider and 1.2 mm length called a 30% slider. JP-A-6-309641
In the method of suspending and dipping the head chip in a container containing a reducing solution as described in the publication, it is difficult to apply the solution only to the surface to which the slider is bonded.

When the metal soap used as a reducing agent is dried, metal powder is generated, dust is generated in the magnetic disk device, and there is a danger that the metal soap enters between the flying head and the disk and causes a crash. If the commercial reducing agent recommended by the vendor is based on metal soap, it is desirable to avoid using it, and thus it will not be possible to obtain sufficient adhesive strength.

It is an object of the present invention to provide a gimbal in which a slider can be easily rotated about an axis parallel to a disk surface, and has a gimbal which is not easily deformed or broken by a load in a direction parallel to the disk surface. It is an object of the present invention to provide a magnetic disk drive with high speed, high recording density and high reliability by providing a magnetic head supporting mechanism having a sufficient slider adhesive strength.

[0016]

SUMMARY OF THE INVENTION A slider on which a magnetic head is mounted and a spacer mounting portion are connected to the spacer mounting portion by sandwiching the slider spacer between them or fixing the slider spacer with an adhesive without using a slider spacer. A pair of inner arm portions, an inner flexible portion connected to the inner arm portion on the inner side, and an outer flexible portion connected to the outer arm portion on the outer side; In the magnetic head support mechanism with a gimbal composed of the outer arm of the slider, the peroxide compound catalyst in the adhesive is decomposed by the reduction action of the metal disposed on the bonding surface facing the slider back surface, whereby the reaction component is radicalized Acrylic adhesive that demonstrates adhesive performance by polymerizing is applied between the adhesive surface and the back of the slider,
A predetermined curing treatment is applied to cure the two, and the two are bonded.

Further, by making the width of the inner arm portion connected to the spacer mounting portion wider than the width of the inner arm portion connected to the annular flexible portion, the slider can be easily rotated about an axis parallel to the disk surface. It is possible to provide a magnetic head support mechanism having strength against force parallel to the disk surface,
A high-speed, high-recording-density, high-reliability magnetic disk storage device can be realized by high-speed, high-precision positioning and stable low levitation.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1, 2 and 3 show a first embodiment of a magnetic head support mechanism to which the present invention is applied. FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a plan view of the tip, and FIG. 3 is a diagram schematically illustrating deformation of the tip when a force acts in a seek direction.

The magnetic head supporting mechanism of the first embodiment is a slider 1 on which a magnetic head is mounted, a slider spacer 2 for holding the slider 1, and a flexible member so that the slider 1 can follow the undulation of the disk surface. It comprises a gimbal 3 having a structure, and a load arm 4 for applying a pressing load perpendicular to the disk surface to the slider in order to keep the flying height of the slider 1 properly. The load arm 4 is connected to an actuator for positioning the magnetic head on the side opposite to the slider 1. The slider 1 on the disk surface on which data is recorded floats on the disk surface by the airflow generated on the disk surface by the rotation of the disk. The distance between the slider 1 and the disk surface is kept constant at the position where the force due to the air flow and the pressing load balance. The actuator allows the magnetic head to move in a direction approaching a spindle motor installed at the center of the disk for rotating the disk and a direction toward the outer periphery near the outer edge of the disk, that is, a seek operation, while flying with the slider 1.

The gimbal 3 is overlapped with a spacer mounting portion 3a joined to the slider spacer 1 by welding or the like, two inner arm portions 3b connecting the spacer mounting portion 3a and the annular flexible portion 3d, and an annular flexible portion 3d. It comprises two outer arm portions 3c connecting the portions 3e, an annular flexible portion 3d, and an overlapping portion 3e joined to the load arm 4. By adopting such a structure, the slider 1 can easily rotate around two mutually orthogonal rotation axes formed by the two inner arm portions 3b and the outer arm portions 3c, respectively, and the waviness of the disk surface can be improved. It is possible to perform stable levitation by following the above.

In order to realize a high-speed, high-recording-density, high-reliability magnetic disk drive, the head is positioned at a high speed on a track for reading and writing data on the disk, and the radius of the disk having a small radius is determined. It is required that a large number of tracks are written along the disk rotation direction in the direction of rotation, and that the recording medium, the magnetic head, and the components such as the magnetic head support mechanism on the disk are hardly deteriorated or destroyed for a long period of time. .

In order to position the head at one target track among tracks arranged at high density on the disk at a high speed, the acceleration / deceleration at the time of moving the head is increased by increasing the driving force of the actuator. Done instantly,
It is effective to increase the moving speed of the head. However, because the distance between adjacent tracks is small, if the head position is shifted from the target track, not only the magnetic field from the target track but also the magnetic field from the adjacent track acts on the head when reading data. Read error is likely to occur, and when writing data, the write magnetic field from the head acts not only on the target track but also on the adjacent track, which may destroy data on the adjacent track. is there.
Therefore, in order to realize a high-speed, high-recording-density, high-reliability magnetic disk drive, it is necessary to accurately position the head on a target track.

Optimization of the positioning control system is important for high-speed and accurate head positioning, but what is required of the magnetic head support mechanism is that the gimbal 3 and the load arm 4 move in the direction parallel to the disk surface. Is difficult to deform.

A magnetic disk drive used for a long period of time is exposed to vibrations and impacts from the surrounding environment, and a load is applied to the magnetic head support mechanism in all directions. Inertia force due to acceleration and deceleration in the seek operation also acts on the magnetic head support mechanism. If runaway occurs, a large impact acts on the actuator and the magnetic head support mechanism.

In the magnetic disk device employing the contact start / stop method, frictional force acts on the magnetic head support mechanism and the disk while the slider 1 is in contact with the disk when the disk starts rotating. In the magnetic disk device of the contact start / stop method, if the disk sticks to the slider 1 when the disk is stopped, if the disk tries to rotate at the next startup,
Since the slider 1 does not separate from the disk, a force due to the torque of the spindle motor acts on the magnetic head support mechanism.
In order to normally start the magnetic disk drive, a magnetic disk drive that uses a spindle motor or an actuator to generate a force greater than the adhesive force between the disk and the slider 1 and peels off the slider 1 from the disk requires a method of removing the slider 1 from the disk. Large force acts on the magnetic head support mechanism.

In order to realize a highly reliable magnetic disk drive in which the characteristics are not deteriorated or destroyed for a long period of time, the magnetic head supporting mechanism does not cause strength reduction, plastic deformation, buckling, or breakage due to the above-mentioned force. Is required. high speed·
In order to realize a high-density magnetic disk drive, the amplitude of the vibration of the magnetic head support mechanism due to the above-mentioned force must be small, and the vibration must be suppressed within the allowable range for the required positioning accuracy in a short time. Is required.

The magnetic head supporting mechanism which receives the above-mentioned force is required to have high rigidity and strength with respect to the force in the direction parallel to the disk surface, the seek operation direction and the disk rotation direction. FIG. 3 shows the gimbal 3 of the magnetic head support mechanism of the first embodiment when a seek direction force is applied to the slider 1 while the magnetic head support mechanism is fixed on the actuator side and the slider 1 is kept parallel to the disk surface. It is a figure showing the outline of modification of.

According to the study by the authors, the portion adjacent to the outer arm portion 3c of the annular flexible portion 3d indicated by the arrow A and the arrow B
The analysis by the finite element method revealed that the tensile stress was maximized at the base of the inner arm 3b on the spacer mounting portion 3a side as indicated by. In addition, the above-mentioned force load /
Also in the experiment by repeating unloading, it was confirmed that breakage occurred at points indicated by arrows A and B.

Therefore, the gimbal 3 having high strength against the force in the seek direction is realized by forming the portion indicated by the arrow A for the annular flexible portion 3d and the portion indicated by the arrow B for the inner arm 3b. it can.

On the other hand, the flexibility of the gimbal 3 with respect to the rotation of the slider 1 around the axis connecting the pair of inner arms 3b, which is the longitudinal direction of the slider 1, is important for stabilizing the flying attitude and the flying height of the slider. is there. The difference between the attitude of the air bearing surface when no force is applied to the air bearing surface of the slider 1 and the attitude of the air bearing surface when flying by the force of the air film gives a moment to the slider, and causes the slider flying height and magnetic force. Causes spacing variations between the head and the disk.

If the flying height of the slider 1 is too high, reading and writing of data on the disk surface cannot be performed accurately, and a magnetic disk device with a high recording density cannot be realized. If the flying height is too low, the risk of data corruption on the disk due to contact between the slider 1 and the disk increases.

In order to reduce the variation of the flying height and to realize a magnetic disk drive of high recording density with a stable low flying height, it is important to reduce the moment acting on the flying slider 1. The slider 1 is required to be easily rotatable around an axis connecting the inner arm 3b of the gimbal 3.

The flexibility of the gimbal 3 with respect to rotation about the axis connecting the inner arm 3b is such that the width b of the inner arm 3b is reduced or the thickness thereof is reduced, and the torsional rigidity of the inner arm 3b is reduced. Can be achieved by In order to secure the rigidity and strength against the force parallel to the disk surface and to achieve the flexibility with respect to the rotation about the axis connecting the inner arms 3b, the inner arms 3
It is effective to make the width b of the b in the side of the annular flexible portion 3d narrow and the width a of the inner arm 3b in the side of the spacer mounting portion 3a wide.

In FIG. 2, the widths a and b are defined by the intersection of two straight lines connected by rounding or chamfering. In the example shown in FIG. 2, the straight portion of the contour of the inner arm 3b is connected to the inside of the annular flexible portion 3d and the spacer attaching portion 3a by rounding the contour of the inner arm 3b.

It is practically preferable that the width b is at least twice the plate thickness from the viewpoint of processing and strength. However, the width b depends on the design value of the rigidity against rotation about the axis parallel to the disk and the strength against the force parallel to the disk. It is desirable to design as narrow as possible. In the example we examined, the ratio of width a to width b was 1.2
No stress concentration or breakage was observed in the narrow portion of the inner arm portion 3b on the side connected to the annular flexible portion 3d.

The effect of the present invention can be obtained even when the contour of the inner arm 3b does not include a straight line portion. in this case,
Although the widths a and b cannot be defined, for example, the rounding radius at the side where the inner arm portion 3b and the spacer attaching portion 3a connect is large, and the rounding radius at the side where the inner arm portion 3b and the annular flexible portion 3d connect is large. If both are arranged in such a position that the circle formed by the smaller rounded corner is inscribed in the circle formed by the larger rounded corner, the narrowest portion of the inner arm portion 3b becomes the spacer mounting portion 3a and the annular flexible portion. It is located closer to the annular flexible portion than the middle of the portion 3d.

By taking the above-described form, the inner arm 3b
The gimbal can be designed so that the narrowest portion of the gimbal can be kept away from the location where stress concentrates during a seek load, is flexible against rotation about an axis parallel to the disk, and is not easily broken by a force in the seek direction.

FIG. 4 is a plan view of the tip of a second embodiment of the magnetic head support mechanism to which the present invention is applied. The correspondence between the reference numerals and the parts is the same as in the first embodiment. As in the first embodiment, the inner arm 3b is wider on the spacer mounting portion 3a side and narrower on the annular flexible portion 3d, and the inner arm 3b is formed thinner than other portions in the gimbal 3. Have been.

The bending stress generated in the inner arm 3b when a force in the seek direction acts on the gimbal 3 is inversely proportional to the product of the cube of the width and the thickness. Therefore, by increasing the width and reducing the thickness of the inner arm 3b, the torsional rigidity is reduced while securing the strength against the force in the seek direction, and the rotation of the slider 1 around the axis connecting the inner arm 3b is achieved. Made it easier.

FIG. 5 shows the inner arm 3 of the gimbal 3 of the second embodiment.
The example of the cross-sectional shape of the part where b is made thinner is shown. Regarding the cross-sectional shape of the portion to be thinned, as shown in FIG. 5 (a), the entire shape may be thinned, or as shown in FIGS. The shape may be such that the thickness is continuously changed from the center to the end as shown in FIG. Although not shown, the portions to be thinned are the inner arm portion 3b and the annular flexible portion 3.
It is also possible to include a connection d.

FIG. 6 is a plan view of the tip of a third embodiment of the magnetic head support mechanism to which the present invention is applied. As in the first and second embodiments, the inner arm 3b is wider on the spacer mounting portion 3a side, the annular flexible portion 3d is narrower, and a hole is provided in the inner arm 3b. One or a plurality of holes may be provided, but by arranging a plurality of holes, the strength in the seek direction can be increased when the inner arm portion 3b has a ladder shape. By providing a hole in the inner arm 3b, the torsional rigidity of the inner arm 3b is reduced, and the rotation of the slider 1 around the axis connecting the inner arm 3b is facilitated.

FIG. 7 is a plan view of the tip of a fourth embodiment of the magnetic head support mechanism to which the present invention is applied. One side obtained by dividing the annular flexible portion 3d by the outer arm 3c is formed shorter than the other, and the inner arm 3f connected to the shorter side and the inner arm 3g connected to the longer side are removed. The reference numeral is Example 1,
Same as 2 and 3. As in the first embodiment, the inner arm portions 3f, 3
g is wider on the spacer mounting portion 3a side, and the annular flexible portion 3d
The width c of the short side of the annular flexible portion 3d is formed so as to have a narrow side.
Are formed wider than the width d of the longer side.

A gimbal having a structure in which the annular flexible portion 3d is asymmetrical with respect to the outer arm portion 3c as shown in FIG. 7 has an interference between the signal line 5 and the annular flexible portion 3d when the signal line 5 is routed as shown in FIG. This is used to prevent disconnection of the signal line 5 due to the above, and to save space for downsizing the magnetic disk drive.

FIG. 9 is a plan view schematically showing the deformation of the gimbal 3 when the magnetic head support mechanism of the fourth embodiment is fixed on the actuator side and a force is applied in the seek direction while keeping the slider 1 parallel to the disk. FIG. FIG.
FIG. 4 is a plan view schematically showing deformation of the gimbal 3 when a force is applied in the track direction while the magnetic head support mechanism of the embodiment is fixed on the actuator side and the slider 1 is kept parallel to the disk.

As a result of analyzing the case where a force in the seek direction acts on the gimbal 3 of the fourth embodiment using the finite element method, the maximum tensile stress was found at the same location as in FIG. Arm 3f connected to the shorter side of the arm
It has been clarified that the tensile stress is larger at the portion C at the portion indicated by C and at the portion indicated by D at the inner arm portion 3g connected to the long side of the annular flexible portion 3d. In addition, it was possible to confirm the breakage of this portion by an experiment using a repetitive force.

As a result of analyzing the case where a force in the track direction acts on the gimbal 3 of the fourth embodiment by using the finite element method, the maximum compressive stress is shown at the point indicated by E in FIG. The stress becomes maximum, but the absolute value of the stress is the inner arm 3f on the short side of the annular flexible portion 3d indicated by E.
And that it becomes the maximum at the adjacent location. In the experiment using the repetitive force, breakage at the above-mentioned locations was confirmed.

9 and 10, the shorter side of the annular flexible portion 3d is wider than the longer side, and the inner arms 3f, 3f
g on the side of the spacer mounting portion 3a,
In particular, the spacer mounting portion 3a of the inner arm portion 3f connected to the shorter side of the annular flexible portion 3d is connected to the spacer mounting portion of the inner arm portion 3g connected to the longer side of the annular flexible portion 3d. By forming the gimbal 3 wider than the side 3a, the gimbal 3 which is flexible with respect to the rotation of the slider 1 about the axis connecting the pair of inner arms 3f and 3g and which has high strength against the force in the seek and track directions can be realized.

In the gimbal 3 of the fourth embodiment, similarly to the second and third embodiments, the inner arms 3f and 3g are made thin or the inner arms 3f and 3g are provided with holes. The gimbal 3 has high strength against a force parallel to the disk surface, and is flexible with respect to rotation about an axis connecting the inner arm portions 3f and 3g.

FIG. 11 shows a load w perpendicular to the disk surface acting at the intersection of the axis connecting the pair of outer arms 3c and the axis connecting the inner arms 3f and 3g of the gimbal 3 of the fourth embodiment. FIG. 4 is a diagram schematically showing a displacement of a slider 1 in a case. Due to the short length and the wide width, the rigidity on the short side is higher than the rigidity on the long side, so that it is difficult to be deformed by a load, and the slider displacement e on the short side of the side of the annular flexible portion 3d is small. On the other hand, the slider displacement f is large on the long side.

The axis connecting the pair of outer arms 3c and the inner arms 3f,
It is desirable for the flying design that the slider displacement when a load acts on the intersection with the axis connecting 3g is equal on the long side and the short side of the annular flexible portion 3d. If the slider 1 is lifted in parallel when a load is applied to the intersection, the axis connecting the pair of outer arms 3c and the axis connecting the inner arms 3f and 3g are pitch axes, respectively.
It is possible to analyze the moment acting on the slider 1 during flying, assuming that the roll axis is the rotation axis of the slider 1. In the case where the slider cannot be lifted in parallel by the load, in the fourth embodiment, the rotation axis corresponding to the pitch axis is a pair of outer arm portions 3c.
, It is difficult to analyze the moment acting on the slider 1 during flying.

If the rigidity of the short side of the annular flexible portion 3d with respect to the load is reduced, the coincidence of the rotation axes can be achieved.
A magnetic head support mechanism that facilitates flying design. By forming the shorter side of the annular flexible portion 3d thinner and wider than the longer side, the outer arm 3c and the inner arms 3f and 3g can secure strength against a force parallel to the disk surface. It is possible to realize the gimbal 3 having the configured rotation axis.

FIG. 12 is a plan view of the tip of a fifth embodiment of the magnetic head supporting mechanism to which the present invention is applied. As described above, the shorter side of the annular flexible portion 3d is thinner than the other in comparison with the fourth embodiment. The cross-sectional shape of the portion to be thinned may be any of FIGS. 5 (a) to 5 (f).

FIG. 13 is a plan view of the tip of a sixth embodiment of the magnetic head support mechanism to which the present invention is applied. Instead of thinning the short side of the annular flexible portion 3d as in the fifth embodiment, by providing holes, the rigidity of the short side is reduced with respect to the load, and the strength against the force parallel to the disk surface is secured. Meanwhile, it is possible to realize the gimbal 3 having a rotation axis constituted by the outer arm 3c and the inner arms 3f and 3g.

FIG. 14 is a plan view of the tip of a seventh embodiment of the magnetic head support mechanism to which the present invention is applied. In addition to the gimbal 3 of the fourth embodiment, a columnar portion 2b having an area equal to or smaller than the bonding portion 2a and the spacer mounting portion 3a is provided on the slider spacer 2. At a portion where the columnar portion 2a and the spacer attaching portion 3a are in contact, they are joined by welding or the like. The center of the columnar portion 2a is a pair of outer arm portions 3.
It is arranged on the longer side of the annular flexible portion 3d than the straight line connecting c.

FIG. 15 shows a case where a load perpendicular to the disk surface is applied to the intersection of a straight line connecting the inner arms 3f and 3g and a straight line connecting a pair of outer arms by the magnetic head support mechanism of the seventh embodiment. 5 shows the slider displacement of FIG. In the case of the fourth embodiment, as shown in FIG. 11, the slider posture is not parallel to the posture before the load is applied, whereas the slider posture is at the contact part between the columnar part 2a and the spacer mounting part 3a. Since the bending posture of the gimbal 3 is parallel to the posture before applying the load, the slider posture is parallel to the posture before applying the load. Thus, the axis connecting the pair of outer arms 3c can be regarded as the pitch axis of the slider 1, and the flying design can be easily performed.

As described above, the gimbal 3 includes the annular flexible portion 3d and the inner arm 3b symmetrical with respect to the pair of outer arms 3c.
In the case of the first or second or third embodiment, in the case of a structure in which the annular flexible portion 3d is divided into a long side and a short side by a pair of outer arms 3c, By taking the form of the fourth embodiment or the fifth or sixth or seventh embodiment, the strength against the force in the direction parallel to the disk surface is high,
It is possible to provide a magnetic head support mechanism having a gimbal 3 that makes it easy for the slider 1 to rotate around the roll and pitch axes, and to achieve high-speed and high-precision positioning because of the difficulty of slider displacement parallel to the disk surface. As a result, a high recording density is achieved by stable low flying, and the magnetic head support mechanism is hard to be broken by a load acting on the magnetic disk device, so that a highly reliable magnetic disk device can be realized.

FIG. 16 is a sectional view of the tip of the magnetic head support mechanism according to the first embodiment of the present invention. By disposing a metal 7 such as Cu, Fe, or Zn on the side of the slider spacer 2 facing the back surface of the slider 1, a modified acrylic adhesive 6 is provided.
The peroxide compound catalyst contained in the catalyst is decomposed by a reducing action and the catalytic action is activated, whereby the reaction component undergoes radical polymerization and adheres the slider 1 and the slider spacer 2 with sufficient strength. Further, since the reducing agent of the metal soap is not used, no metal powder is generated due to the application and drying of the reducing agent, and it is possible to prevent a crash caused by the metal powder entering between the slider 1 and the disk in the disk device.

The metal 7 is desirably in a form that does not generate dust, and may be on the slider spacer 2 side, the slider 1 back surface, or both as shown in FIG. It is possible to include metal 7 in the material of the magnetic head supporting mechanism such as the gimbal 2, the slider spacer 2, and the slider 1, but it is difficult due to the electric and magnetic properties and mechanical properties such as strength, rigidity, and workability. Often.

Plating is a practical method for disposing the metal 7 on the side of the slider spacer 2 that faces the rear surface of the slider 1 or on the rear surface of the slider 1. Alternatively, vacuum deposition or sputtering may be used. Although patterning by photolithography or etching is not required after the formation of the metal film 7, the slider spacer 2 may be patterned into a shape conforming to the shape of the back surface of the slider 1. By providing the surface of the metal 7 with a surface roughness equal to or less than the thickness of the adhesive 6, the contact area between the adhesive 6 and the metal 7 can be increased, and the reduction action can be promoted. Metal 7
Is a slider 1 of the magnetic head support mechanism of the second to seventh embodiments.
It can be used for bonding.

As described in the above embodiment, according to the present invention, the slider 1 is less likely to peel or the gimbal 3 is broken by the force in the direction parallel to the disk surface, and the rotation of the slider 1 around the roll and pitch axes is easy. A magnetic head supporting mechanism having a gimbal 3 can be provided, and high-speed and high-precision positioning can be realized because of difficulty in displacing the slider 1 parallel to the disk surface, and high recording density can be achieved by stable and low flying due to ease of rotation. Since the magnetic head support mechanism is hard to be broken by a load acting on the magnetic disk device, a highly reliable magnetic disk device can be realized.

[0062]

The gimbal breakage and the slider peeling due to the force in the direction parallel to the disk surface hardly occur, the slider displacement in the direction parallel to the disk surface hardly occurs, and the slider easily rotates around the axis parallel to the disk surface. By providing a magnetic head supporting mechanism having a gimbal that can be used, it is possible to realize a magnetic disk device with high speed, high recording density, and high reliability due to high positioning speed, low flying height, and high strength.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a magnetic head support mechanism to which the present invention is applied.

FIG. 2 is a plan view of a distal end portion of the first embodiment of the magnetic head supporting mechanism to which the present invention is applied.

FIG. 3 is a plan view schematically showing the deformation of the gimbal when a force in the seek direction acts on the first embodiment of the magnetic head support mechanism to which the present invention is applied.

FIG. 4 is a plan view of a tip end of a second embodiment of the magnetic head support mechanism to which the present invention is applied.

FIG. 5 is a diagram illustrating a cross-sectional shape of an inner arm portion of a magnetic head supporting mechanism according to a second embodiment of the present invention.

FIG. 6 is a plan view of a tip end of a third embodiment of the magnetic head support mechanism to which the present invention is applied.

FIG. 7 is a plan view of a distal end portion of a fourth embodiment of the magnetic head support mechanism to which the present invention is applied.

FIG. 8 is an example of signal line routing in a magnetic head assembly using a magnetic head support mechanism according to a fourth embodiment of the present invention.

FIG. 9 is a plan view schematically illustrating deformation of a gimbal when a force in a seek direction is applied to a fourth embodiment of the magnetic head support mechanism to which the present invention is applied.

FIG. 10 shows a fourth example of the magnetic head support mechanism to which the present invention is applied.
It is a top view showing the outline of deformation of a gimbal when a track direction force acts on an example.

FIG. 11 shows a fourth example of the magnetic head support mechanism to which the present invention is applied.
FIG. 9 is a diagram schematically illustrating a slider displacement when a load perpendicular to the disk surface acts on the embodiment.

FIG. 12 shows a fifth example of the magnetic head support mechanism to which the present invention is applied.
It is a top view of the tip part of an example.

FIG. 13 shows a sixth embodiment of the magnetic head support mechanism to which the present invention is applied.
It is a top view of the tip part of an example.

FIG. 14 shows a seventh example of the magnetic head support mechanism to which the present invention is applied.
It is a top view of the tip part of an example.

FIG. 15 shows a seventh example of the magnetic head support mechanism to which the present invention is applied.
FIG. 9 is a diagram schematically illustrating a slider displacement when a load perpendicular to the disk surface acts on the embodiment.

FIG. 16 shows a first example of a magnetic head support mechanism to which the present invention is applied.
It is sectional drawing of the front-end | tip part of an Example.

[Explanation of symbols]

1: slider, 2: slider spacer, 2a
... Adhesive part of slider spacer in the seventh embodiment, 2b ... Columnar part of slider spacer in the seventh embodiment, 3 ... Gimbal, 3a ... Spacer mounting part, 3b ... Inner arm part,
3c: outer arm part, 3d: annular flexible part, 3e ...
Overlapping portion, 3f ... inner arm portion connected to the shorter side of the annular flexible portion in the fourth to seventh embodiments, 3g ... inner portion connected to the longer side of the annular flexible portion in the fourth to seventh embodiments. Arm part, 4 ... Load arm, 5 ... Signal line, 6 ... Adhesive, 7
…metal.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tetsuo Maskawa 2880 Kozu, Odawara City, Kanagawa Prefecture Inside the Hitachi, Ltd.Storage Systems Division (72) Inventor Kenji Takahashi 2880 Kozu Tsu, Kozu, Odawara City, Kanagawa Prefecture Hitachi, Ltd. Storage System Division (72) Inventor Yoshinori Takeuchi 2880 Kozu, Odawara City, Kanagawa Prefecture Storage Systems Division, Hitachi, Ltd. (56) References JP-A-6-3099641 (JP, A) JP-A-63- 32776 (JP, A) JP-A-8-147645 (JP, A) JP-A-2-31390 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 21/21

Claims (11)

(57) [Claims] 1. A magnetic head support mechanism comprising: a slider on which a magnetic head is mounted; and a spacer mounting portion, wherein a slider spacer is interposed between the two or fixed with an adhesive without using a slider spacer. As an agent, an acrylic adhesive that decomposes the peroxide compound catalyst in the adhesive by the reducing action of the metal contained in the magnetic head support mechanism, thereby radically polymerizing the reaction components and exerting adhesive performance, is used for the slider. A magnetic film that is applied between the back surface and the surface facing the back surface, and a metal film that causes a reducing action on the adhesive is disposed on the slider back surface or the surface facing the back surface or both. Head support mechanism. 2. The magnetic head supporting mechanism according to claim 1, wherein the slider on which the magnetic head is mounted and the spacer mounting portion are fixed with an adhesive without using the slider spacer or sandwiching the slider spacer therebetween. A pair of inner arms connected to the spacer attachment portion, an annular flexible portion connected to the inner arm portion on the inner side and an outer arm portion on the outer side, and an outer side of the annular flexible portion forming a right angle with the inner arm portion and the load arm. A gimbal constituted by a pair of outer arms connecting the overlapped portions of the inner arms, wherein the position of the narrowest portion of the inner arm is set to be closer to the midpoint of the end on the spacer mounting portion side and the end on the annular flexible portion side. A magnetic head support mechanism, which is disposed closer to the annular flexible portion. 3. The magnetic head supporting mechanism according to claim 1, wherein a part or the whole of the inner arm is formed thinner than the annular flexible part, the outer arm, the spacer mounting part, or the overlapping part. A magnetic head support mechanism. 4. The magnetic head support mechanism according to claim 1, wherein one or more holes are provided in the inner arm. 5. The magnetic head supporting mechanism according to claim 1, wherein a portion of the annular flexible portion adjacent to the outer arm portion is compared with a portion of the annular flexible portion that is not adjacent to the inner arm portion and the outer arm portion. A magnetic head support mechanism characterized by being formed widely. 6. The magnetic head supporting mechanism according to claim 1, wherein a portion of the annular flexible portion adjacent to the outer arm portion is a portion not adjacent to the inner arm portion and the outer arm portion of the annular flexible portion, or 3. The magnetic head supporting mechanism according to claim 1, wherein the magnetic head supporting mechanism is formed to be thinner than the outer arm portion, the inner arm portion, the spacer attaching portion, or the overlapping portion. 7. The magnetic head supporting mechanism according to claim 1, wherein one or more holes are provided in a portion of the annular flexible portion adjacent to the outer arm portion. mechanism. 8. The magnetic head support mechanism according to claim 1, wherein one side of the annular flexible portion divided into two by a pair of outer arms is shorter than the other side, and the shorter side of the annular flexible portion. The magnetic head supporting mechanism is characterized in that the side is formed wider than the longer side. 9. The magnetic head supporting mechanism according to claim 1, wherein a part or all of the short side of the annular flexible part is part of the long side of the annular flexible part or the outer arm. A magnetic head support mechanism formed thinner than a part, an inner arm part, a spacer attachment part, or an overlap part. 10. The magnetic head supporting mechanism according to claim 1, wherein one or more holes are provided on a short side of the annular flexible portion. 11. A magnetic head supporting mechanism according to claim 1, wherein a columnar portion is provided at a portion in contact with the spacer mounting portion on the slider spacer or the slider rear surface, and the columnar portion is formed by a straight line connecting a pair of outer arm portions. A magnetic head support mechanism, wherein a spacer attachment portion and a columnar portion are joined on a long side of the annular flexible portion.