JP3201756B2 - Composite wound multilayer inductor and method of manufacturing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a multilayer inductor, and more particularly to a composite wound multilayer inductor and a method for manufacturing the same.

[Definition of terms] Here, the "composite winding inductor" refers to a multilayer inductor including a plurality of sets of conductive windings formed in parallel by a known lamination technique using printing, sputtering or vapor deposition techniques. Shall be. The term "inductor" as used herein refers to a self-induction inductor and an inductor transformer formed by using a plurality of sets of conductive windings of the composite winding in series or in parallel. This inductor is not only used alone, but also for filter circuits, intermediate frequency transformers and any other LC composite chip components, LR composite chip components, LCR composite chip components, or any other circuit elements such as diodes, transistors, thermistors, etc. And used as an integral composite part. In short, the laminated inductor of the present invention can be used for any application using a composite wound conductive winding as an element,
It is not limited to single use as an inductor or a transformer.

[Prior Art] The inventors of the present invention disclosed in Japanese Patent Publication No. 57-39521, a method in which a magnetic ferrite layer and an edge conductive layer for forming a coil were alternately printed by a printing method, laminated, sintered, and integrated. A structure of laminated laminated inductor is provided. This technology involves connecting a plurality of printed conductive layers for about a half turn through an edge of an electrically insulating printed ferrite magnetic layer between the conductive layers so that the conductive layers for the half turn are stacked in the stacking direction. In this case, a coil to be overlapped is formed, and the whole is integrally sintered.

Hereinafter, this prior art will be briefly described with reference to FIGS. 83 to 112. In the manufacturing process of the laminated inductor, generally, a plurality of laminated inductors are laminated on a wide easily peelable substrate.
Hereinafter, only one laminated inductor will be described for convenience of description. In these figures, (a) is a plan view and (b) is a cross-sectional view. Referring to FIG. 83, an electrically insulating and magnetically permeable material is provided on an easily peelable substrate (not shown) in which a polyester (preferably a polyethylene terephthalate film) is formed on the surface of a substrate (such as aluminum) having high flatness. 84. A magnetic ferrite layer 1 or a magnetic ferrite layer 1 having an electric insulating film on its surface is printed as required, and a ferrite layer 2 for correcting a printing step is printed thereon as shown in FIG. As shown in FIG. 85, the coil lead conductive layer 3 is printed. Next, as shown in FIG. 86, a magnetic ferrite layer 5 is printed on the right half except for the leading end 4 of the conductive coil of the lead conductive layer. Next, as shown in FIG. 87, the coil forming conductive layer 6 for about half turn is printed by being connected to the coil starting end 4. Next, as shown in FIG. 88, the magnetic ferrite layer 7 is printed on the left half except for one end 8 of the coil forming conductive layer 6, and then, as shown in FIG. A coil forming conductive layer 9 for about a half turn is printed by being connected to one end 8. Next, as shown in FIG. 90, the magnetic ferrite layer 11 is printed on the right half while leaving one end portion 10 of the coil forming conductive layer 9, and then, as shown in FIG. The coil forming conductive layer 12 for about half turn is printed by being connected to the one end portion 10. Next, as shown in FIG. 92, the magnetic ferrite layer 13 is removed while leaving one end 14 of the coil-forming conductive layer 12.
Is printed on the left half, and then, as shown in FIG. 93, connected to one end 14 of the coil-forming conductive layer, the coil-forming conductive layer 15 for about half turn is printed. In the laminating process up to FIG. 92, the coil-forming conductive layers 3, 6, 9, 12, and 15 having approximately two turns are laminated. In order to obtain a coil-forming conductive layer having a desired number of turns, the same lamination process as in FIGS. 86 to 93 may be repeated. For convenience of explanation, it is assumed that the lamination is completed in the manufacturing process of FIG. After the two-turn coil forming conductive layer is formed, the coil lead conductive layer 18 is printed as shown in FIG. 95, and then the magnetic ferrite layer is formed on the entire surface as shown in FIG. 96.
After printing 19, sintering and baking of necessary external lead-out terminals are performed to obtain a multilayer inductor. FIG. 97 shows an equivalent circuit of this laminated inductor.

Another conventional method of manufacturing a laminated inductor is shown in FIGS. 98 to 112 (see Japanese Patent Application Laid-Open No. 59-22304). These figures are plan views illustrating a manufacturing process of a laminated inductor using a laminating technique such as a vapor phase method such as a printing technique, a sputtering or a vapor deposition technique. The illustration depends on the printing technique.

98 Figure-107th figure and the orbiting axis of the secondary coil winding forming conductive layer leading to S ₂ from the orbiting axis and S ₁ of the primary coil winding forming conductive layers extending from P ₁ to P ₂ FIGS. 108 to 112 illustrate manufacturing steps of a laminated inductor that is shifted.
The manufacturing process of the laminated inductor in which the orbital axis is not shifted, that is, the primary coil winding forming conductive layer and the secondary coil winding forming conductive layer are concentrically arranged is illustrated.

Hereinafter, the manufacturing process of these laminated inductors will be briefly described. Note that, as described above, only one laminated inductor will be described for convenience of description. As shown in FIG. 98, a magnetic layer 31 such as a magnetic ferrite is printed on an easily peelable substrate (not shown), and a conductive layer 32 for a primary winding for about a half turn is printed on the surface. I do. Note that one end P _{1 of the} conductive layer 32
Is drawn out to the side of the magnetic layer 31. Next, as shown in FIG. 99, the conductive layer 32 is covered with the magnetic layer 34 except for one end 33 of the conductive layer 32. Next, print the approximately conductive layer 35 for the secondary winding of the half-turn component having a withdrawal end S _1, and simultaneously conducting layer 32
The conductive layer 36 for about a half turn is printed by being connected to one end 33 of the. Next, as shown in FIG. 100, the magnetic layer 39 is printed except for both ends 37 and 38 of the conductive layers 35 and 36. Then, end 3
The conductive layers 40 and 41 for about a half turn are printed by connecting to 7 and 38, respectively. Next, as shown in FIG. 101, the magnetic layer 44 is printed except for the ends 42 and 43 of the conductive layers 40 and 41, and the conductive layer 45 is connected to the ends 42 and 43 for about a half turn. Print 46. Next, as shown in FIG. 102, the magnetic layer 47 is printed in the same manner as the magnetic layer 39, and the conductive layer 46 is connected via the conductive layer 48 to the leading end P _{2 on the} right side.
And the conductive layer 45 is extended by the conductive layer 49 for about a half turn. Next, as shown in FIG. 103, a magnetic layer 50 is printed in the same manner as the magnetic layer 44, and one end of the conductive layer 49 is connected to the conductive layer 51.
By printing, drawing out the withdrawal end S ₂ of the left side of the stack. Finally, as shown in FIG. 104, the magnetic layer 52 is printed on the entire surface. In order to obtain a conductive layer for a primary coil winding or a conductive layer for a secondary coil winding having a desired number of turns, FIG.
It will be apparent that the illustrated stacking process may be repeated multiple times. After finishing the desired lamination, the laminate is sintered and
As shown in FIG. 106, by baking an appropriate conductive paste on the lead ends P ₁ , P ₂ , S ₁ , and S ₂ , a chip-shaped laminated inductor can be obtained.

Next, as another conventional example, a laminated inductor obtained by the manufacturing process shown in FIGS. 108 to 112 will be briefly described (see JP-A-59-22304).

As in the first 108 Figure, on the easy peelability of the substrate (not shown), a magnetic layer 62 is printed, approximately half a turn portion of the primary coil winding form having a withdrawal end P ₁ on the surface The conductive layer 63 is printed. Next, as shown in FIG. 109, the magnetic layer 64 is printed, and one end of the conductive layer 63 is connected to one end of the conductive layer 63, leaving one end of the conductive layer 63. Drawer end S ₁
The conductive layer 66 for forming a secondary coil winding for about a half turn extending from is printed. Next, as shown in FIG. 110, the magnetic layer 67
Is printed while leaving the ends of the conductive layers 65 and 66, and the conductive layers 68 and 69 for about a half turn are printed by connecting to the ends. Then the eleventh
As Figure 1, after printing the magnetic layer 70, a conductive layer extending from the exposed end of the conductive layer 68 to the withdrawal end P ₂ of the left side of the stack 71
Print the, also generally prints the conductive layer 72 of the U-shaped extending from the exposed end of the conductive layer 69 to the withdrawal end S ₂ of the right side of the stack. It will be apparent that a multilayer inductor having a desired number of turns can be obtained by repeating the lamination process of FIGS. 109 to 110. After completing the lamination of a desired number of turns, as shown in FIG. 112, the magnetic layer 73 is printed and sintered, and the external terminals S ₁ , S ₂ , P ₁ ,
Laminated inductor resulting chips by performing baking of P ₂ can be obtained.

[Problems of the Related Art] A multilayer inductor is generally used in various circuits such as a filter circuit and an intermediate frequency transformer, and is used in a wide frequency band. Therefore, it is desirable that its inductance L be changed widely. Generally, the inductance L (H) of a multilayer inductor is Is represented by Here, A is the cross-sectional area of the coil winding part (m ^2), l is the magnetic path length (m), μ _e is the effective permeability (Wb / A · m), N is the winding Number of times. As is apparent from the equation (1), it is clear that increasing the number of turns is the most effective method for increasing the inductance L. That is, the inductance increases in proportion to the square of the number of turns.

However, in the case of the conventional multilayer inductor shown in FIGS. 83 to 96, the winding forming conductive layers 3, 6, and 9 of about one turn are formed in the printing process up to FIG. 89. .
This means that when viewed from the lamination thickness of the magnetic ferrite layer and the coil forming conductive layer, the five-layer thickness (including the ferrite layer 5 for correcting the printing step shown in FIG. 83, the six-layer thickness) In addition, when an electric insulating film is required, only one turn of the conductive layer for coil formation can be laminated with a thickness of seven layers. On the other hand, in the case of the laminated inductors shown in FIGS. 98 to 107 and FIGS. 108 to 112, since the winding direction of each coil is the same, when a current is applied to each coil, it is generated in each coil. Since the directions of the magnetic fluxes are opposite to each other, the inductance does not increase, and only a so-called bifilar coil is formed.

The present inventors have searched for a multilayer inductor in which the inductance L is dramatically increased while keeping the multilayer thickness substantially constant, and a method of manufacturing the same. As a result, FIGS. 1 to 27 and 28
A composite wound multilayer inductor according to the present invention illustrated in FIGS. 63 to 63 and FIGS. 64 to 82 has been developed.

[Outline of the Present Invention] The principle of the present invention will be described with reference to FIG. As illustrated in FIG. 27, the present inventors have found that a clockwise coil winding extending in P ₁ to P ₂ (hereinafter, in FIG. 27, right in the proceeds direction Figure by rotating the right-handed screw the direction of rotation of the right screw when going towards the right direction, the right-handed rotation direction when going to the left in the drawing is defined as counterclockwise.) a coil winding counterclockwise reaching the S ₁ to S ₂ is , if, by connecting the end S ₂ counterclockwise coil winding and end P ₂ clockwise coil winding, the coil windings, constantly returning the end S ₁ starting with clockwise from the starting end P ₁ Noticed. In other words, if the ends of the pair of coil windings in opposite directions are connected to each other or the starting ends thereof are connected, the coil windings in the rotating direction in a certain direction can be obtained as a whole. The present inventors have discovered that if this principle is successfully applied to pattern formation of a conductive layer of a laminated inductor, it is possible to keep the lamination thickness constant and more than double the number of coil turns. As a result, the number of windings can be more than doubled, though the lamination thickness is not substantially different from the conventional one. Therefore, the inductance can be increased about four times or more.

That is, the present invention includes an alternating laminate of a plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils, and the conductive pieces of each set are adjacent to each other via an edge of the insulating piece. A plurality of coils wound around a common axis, and at least two of the plurality of coils are spiraled in opposite directions to each other; A coil is formed so as to form a shape, and the coil composed of at least two sets thereof is connected to each other at the beginning, middle, or end of the conductive piece to provide a composite wound laminated inductor.

The present invention also provides a method of manufacturing such a composite wound laminated inductor, wherein the method of the present invention uses a paste of an insulator powder and a paste of a conductive powder to form a plurality of coils orbiting substantially around a common axis. In manufacturing a composite wound laminated inductor by alternately printing and laminating a plurality of sets of conductive pieces and a plurality of insulating pieces for forming a set of coils, forming an insulating piece on an easily peelable substrate by printing, Printing and forming a plurality of sets of conductive strips on which at least two sets create opposite windings,
An insulating piece is printed and formed thereon, leaving an end of the conductive piece, and another plurality of sets of conductive pieces having a starting end connected to the corresponding end of the plurality of sets of conductive pieces are printed on the insulating piece. Forming, repeating the same steps as many times as necessary, finally forming an insulating piece by printing on the entire surface of the thus laminated product, and further, at the beginning, middle, or end of the printing process, the at least two sets of the reverse-wound coils Are connected to each other by printing at adjacent portions and finally peeled off from the substrate.

Further, the composite wound laminated inductor of the present invention can also be manufactured by a vapor phase method. In another method of the present invention, a gas phase method such as a sputtering method using a mask of a predetermined shape is used to form an inductor around a common axis. In manufacturing a composite wound laminated inductor by alternately printing and laminating a plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils that circulate around, forming an insulating piece on a substrate, At least two sets form a plurality of sets of conductive pieces that generate reverse winding with each other, and form an insulating piece thereon while leaving the ends of the conductive pieces on the corresponding set of ends of the plurality of sets of conductive pieces. Another set of conductive pieces having a starting end to be connected are formed on the insulating piece, and the same process is repeated as many times as necessary. Further, at the beginning, middle, or end of the laminating step, the at least two sets of conductive pieces are formed. Reverse winding coils in close proximity A method of manufacturing a composite winding laminated inductor, characterized in that to connect to.

[Detailed Description of the Invention] Figs. 1 to 26 are a plan view (a) and a cross-sectional view (a) illustrating a manufacturing process of a composite wound multilayer inductor according to a first embodiment of the present invention to which this principle is applied. b). The second aspect of the composite wound multilayer inductor according to the present invention that applies the same principle
The manufacturing process of this embodiment is shown in FIGS. 28 to 63. FIGS. 1 to 26 and FIGS. 28 to 63 illustrate a composite wound laminated inductor having two sets of conductive pieces for coil winding stacked in opposite directions, and FIGS. 64 to 82. In the third embodiment of the composite wound laminated inductor according to the present invention shown in FIG. 2, two sets of conductive pieces (rotational direction are the same and supposed to be clockwise) and two sets of conductive pieces (rotational direction are the same. A composite wound multilayer inductor having four sets of coil winding conductive pieces in which a plurality of the above-described two sets of conductive pieces are counterclockwise counter to each other is illustrated. In each of the embodiments, each set of coil winding forming conductive pieces is common in that it is substantially circumscribed around a common axis.

Hereinafter, first, second and third embodiments of the present invention will be described in detail.

In the manufacturing process of the composite wound laminated inductor, a plurality of composite wound laminated inductors are simultaneously laminated on the same easily peelable substrate, but a single composite wound laminated inductor will be described below for convenience of explanation. In the following description, the laminating step will be described as using a conventional well-known printing technique, but it is also possible to perform laminating by a thin film method such as a sputtering method or a vapor deposition method. Furthermore, in the description of the embodiment, a laminated pattern of a composite wound multilayer inductor having two or four sets of conductive pieces for forming coil windings will be described. It will be apparent that the technical idea of the present invention also includes a composite wound laminated inductor having a conductive piece for forming a coil winding and having at least two sets thereof stacked in opposite directions. Various conventional conductors can be used as the material of the coil winding forming conductive piece, and various conventional magnetic materials can also be used as the material of the magnetic piece. Examples of possible materials for the conductive piece include Ag (silver), Au (gold), Cu (copper), Pd
Paste materials in which powders such as (palladium) and Ag-Pd (silver-palladium) alloys are kneaded with a suitable binder are conceivable. Paste materials in which various metal powders and a suitable binder are kneaded can be considered. Can be considered. Furthermore, in the case of using a vapor deposition method, any conductive material such as Al, NinCr-Au, and Cr-Au can be considered. Further, as magnetic pieces, Zn ferrite, Mn-Zn ferrite, Ni-Cu-Zn ferrite, Fe ₂ O
A magnetic piece such as a ferrite or a magnetic piece interposed with an insulating layer such as a dielectric or a magnetic substance as necessary is conceivable. As the insulating piece, a glass layer, an alumina layer, barium titanate,
It can be selected from titanium oxide and the like.

Further, the composite wound multilayer inductor according to the present invention includes a resistor,
It can also be applied to composite parts that incorporate capacitors, transistors, diodes, etc. integrally.

(1) Embodiment 1 A description will be given of a manufacturing process of the composite wound multilayer inductor of Embodiment 1 according to the present invention shown in FIGS. 1 to 26. (A) in the figure is a plan view of the composite wound multilayer inductor, and (b)
Is a sectional view thereof.

As shown in FIG. 1, a magnetic layer 81 is printed on the entire surface of an easily peelable substrate (not shown). Next, as shown in FIG. 2, a magnetic piece 82 for correcting a printing step is printed substantially at the center. Next, as shown in FIG. 3, two sets of coil winding lead-out conductive pieces 83 and 84 are printed in a nested shape and substantially symmetrically with each other. The number of turns of the conductive pieces 83 and 84 is preferably about 1/4 turn. The same applies to the following conductive pieces. Next, as shown in FIG.
The magnetic pieces 87 and 88 are printed on the right and left sides, respectively, leaving 5 and 86. The magnetic pieces 87 and 88 are preferably printed so as to have a shape complementary to the magnetic piece 82 of FIG. The thickness of the magnetic pieces 87 and 88 is preferably smaller than the thickness of the conventional magnetic layer and is half the thickness of the conventional magnetic layer. The same applies to the following magnetic pieces.
Next, as shown in FIG. 5, the conductive pieces 90 and 89 for forming the composite winding coil winding are printed in a nested shape and almost symmetrically so as to be connected to the exposed ends 85 and 86. Next, as shown in FIG.
The magnetic piece 91 is printed almost at the center except for the sides 90 and 89. Next, as shown in FIG. 7, the conductive pieces 93 and 92 are connected to the side portions of the conductive pieces 90 and 89 and are shifted from each other and printed, respectively (hereinafter, unless otherwise specified, a period "," Reference numbers before and after correspond to each other). Next, as shown in FIG. 8, the end portions 94 of the conductive pieces 92 and 93,
Printing is performed on the right and left sides of the magnetic pieces 96 and 97, leaving 95. Next, as shown in FIG. 9, the conductive pieces 99 and 98 are connected to the exposed ends 94 and 95 and printed in a nested shape and almost symmetrically. Next, as shown in FIG. 10, the magnetic piece 100 is printed almost at the center except for the side portions of the conductive pieces 98 and 99. Next, as shown in FIG. 11, the conductive pieces 98, 99
Printing is performed by shifting 1, 102 from each other. Hereinafter, FIGS. 4 to 11
The same laminating process as in the figures is performed using FIGS. 12 to 19 and FIGS.
This is repeated in the laminating step of FIG. It will be apparent that the same lamination process may be repeated to obtain the desired number of coil turns. After completing the stacking process for the required number of turns,
Figure further in the lamination process, P ₁ to P 1 reaches the _two sets of coil windings forming conductive piece and reach the S ₁ to S ₂ Another set of end portions P ₂ and S of the coil winding forming conductive strips ₂ and connect the magnetic piece
105 is printed on the entire surface, the laminate is sintered in a firing furnace, and necessary external lead terminals P ₁ and S ₁ are baked to obtain a composite wound laminated inductor according to the present invention.

(2) Embodiment 2 A manufacturing process of a composite wound laminated inductor according to a second embodiment of the present invention shown in FIGS. 28 to 62 will be described.
(A) in the figure is a plan view of the composite wound multilayer inductor,
(B) is a sectional view thereof.

As shown in FIG. 28, the magnetic layer 111 is printed on the entire surface of the easily peelable substrate (not shown). Next, as shown in FIG. 29, a magnetic piece 112 for correcting a printing step is printed substantially at the center. Next, as shown in Figure 30, the conductive strips S ₁ and P ₁ of the coil winding drawer printed on upper and lower sides, and connected to the conductive piece P ₁ Print coil windings forming conductive strips 113 . The number of turns of the conductive piece 113 is preferably about 1/4 turn as in the first embodiment. The same applies to the following conductive pieces. Incidentally, the conductive strip 113 to print not to connect with the conductive piece S _1. Next, as shown in Figure 31, leaving the ends of the part 114 and the conductive piece S ₁ of the conductive strips 113, prints the magnetic pieces 115 and 115 on the right side and left side, respectively. The magnetic pieces 115, 115 are preferably printed so as to be complementary to the magnetic piece 112 in FIG. Also, the thickness of the magnetic pieces 115, 115 is preferably smaller than the thickness of the conventional magnetic layer and about half the thickness of the conventional magnetic layer. The same applies to the following magnetic pieces. Next, as shown in FIG.
The conductive piece 116 for forming a coil winding is printed and extended by being connected to the end 114 of the third. The printed by connecting the conductive strips 117 of the coil winding forming nested shapes conducting pieces S ₁ extending from and electrically conductive strips 116 in the opposite direction to the conductive strip 116 at the same time. Next, as shown in FIG. 33, the magnetic piece 120 is printed substantially at the center except for the ends 118 and 119 of the conductive pieces 116 and 117. Next, the 34th
As shown in the figure, conductive pieces 122 and 121 for forming coil windings are printed and extended in a nested shape connected to the ends 118 and 119, respectively. Next, as shown in FIG. 35, the end portions 12 of the conductive pieces 121 and 122 are
The magnetic pieces 125, 125 are printed on the right side and the left side, respectively, leaving 3 and 124. Next, the conductive strips 12 for forming coil windings are connected to the ends 123 and 124 of the conductive strips and nested with each other.
Print and extend 7, 126. Next, as shown in FIG. 37, the magnetic piece 130 is printed almost at the center except for the end portions 128 and 129 of the conductive pieces 126 and 127. Next, as shown in FIG. 38, the conductive layers 132 and 131 for forming coil windings are connected to the ends 128 and 129 of the conductive pieces in a nested shape by printing and extending. Hereinafter, the same laminating process as in FIGS. 35 to 38 will be described with reference to FIGS. 39 to 46 and FIG.
This is repeated also in the laminating process of FIGS. 47 to 54 and FIGS. 55 to 61. It will be apparent that the same laminating step may be repeated to obtain the desired number of coil turns. After completing the lamination process of the required number of turns, in the lamination process of FIG.
A set of conductive pieces for forming coil windings from P _{1 to} P ₂ and S ₁ to P ₂
End portion P ₂ of another set of coil winding forming conductive layer leading to S ₂
And it connects the S _2, as in the 61 view, print the magnetic piece in a substantially central portion, if necessary, the same end connection and FIG. 60, then, as in the 62nd Figure The magnetic layer 133 is printed on the entire surface, the laminate is sintered in a firing furnace, and necessary external lead terminals P ₁ and S ₁ are baked to obtain a composite wound laminated inductor according to the present invention.

(3) Third Embodiment FIGS. 64 to 81 are plan views of a composite wound laminated inductor having four sets of conductive pieces for forming coil windings according to a third embodiment of the present invention.

As shown in FIG. 63, the magnetic layer 141 is printed on the entire surface of the easily peelable substrate (not shown). Next, as shown in FIG. 65, magnetic pieces 142 and 143 for correcting a printing step are printed on the left side and the right side. Next, as shown in FIG.
A pair of coil winding forming conductive pieces 145 (clockwise) having the two sets of coil winding forming conductive pieces 145
(Clockwise) is printed on the left side, three sets of coil winding forming conductive pieces 147 (counterclockwise) are printed on the right side, and four sets of coil winding forming conductive pieces 146 (counterclockwise) are pulled out to the lower side. Drawer 1
46 '. Then, two sets of clockwise conductive pieces 145 for forming coil windings and three sets of counterclockwise conductive pieces 147 for forming coil windings
To connect the door at the connecting portion T _1. The connecting portion T _1, together with the connecting portion T _2, T ₃ below, which are necessary to the same four pairs that will orbit in the direction of the coil winding constituting the two closed loop. Next, an end 148 of the conductive piece 144, an end 149 of the conductive piece 145, an end 151 of the conductive piece 147, and an end 150 of the conductive piece 146.
The magnetic piece 152 is printed almost at the center except for. The magnetic piece 152 is preferably printed so as to have a shape complementary to the magnetic pieces 142 and 143. The same applies to the following magnetic pieces. Next, as shown in FIG. 68, the conductive piece 153 is connected to the end 148 of the conductive piece 144 in the right direction, and the conductive layer 154 is connected to the end 149 of the conductive piece 145 in the right direction. The conductive piece 155 is connected to the end 150 of the conductive piece 146 to the left, and the conductive piece 156 is connected to the end 151 of the conductive piece 147 to the left to print. Next, as shown in FIG. 69, magnetic pieces 157 and 158 are printed on the left and right sides so as to leave a part of each of the conductive pieces 153 to 156. Next, as shown in FIG. 70, the conductive pieces 159 and 160 are connected to the conductive pieces 153 and 154 in the clockwise direction, and printing is performed and extended. In addition, the conductive pieces 161 and 162 are connected to the conductive pieces 155 and 156 in the counterclockwise direction to print and extend. The number of turns of the conductive pieces 159 to 161 is preferably about 1/4 turn. Next, as shown in FIG. 71, a magnetic piece 163 is printed substantially at the center so as to leave a part of the conductive pieces 159 to 161. Next, as shown in FIG. 72, the conductive pieces 164, 165
Are connected to the conductive pieces 160 and 159 and printed in the left direction.
6 and 167 are connected to the conductive layers 162 and 161 and printed in the right direction.
Next, as shown in FIG. 73, magnetic pieces 168 and 169 are printed on the left side or the right side so as to leave the conductive pieces 164 to 167. Next,
As shown in FIG. 74, preferably, the conductive piece 170 for about 1/4 turn,
171 is connected to the conductive pieces 165 and 164 in the clockwise direction to extend printing. Also, preferably a conductive piece 172 for about 1/4 turn,
173 is connected to the conductive pieces 167 and 166 in the counterclockwise direction to perform print extension. Next, as shown in FIG. 75, a magnetic piece 174 is printed almost at the center so as to leave a part of each of the conductive pieces 170 to 173. Next, as shown in FIG. 76, the conductive pieces 175 and 176 are
To the right and print the conductive strips 177 and 178 on the conductive layer 17
2. Connect to 173 and print to the left. Hereinafter, from FIG. 69 to FIG.
It will be apparent that the desired number of conductive strips for forming coil windings can be printed by repeating the same stacking process as in FIG.
After the desired number of lamination steps, as shown in FIG. 75, a magnetic piece 174 is printed at the center, and as shown in FIG. 77, two sets of clockwise clockwise conductive pieces 176 for forming coil windings are formed. connecting four sets of left-handed and a coil winding forming conductive strips 177 at the junction T _2.
Next, as shown in FIG. 78, the magnetic pieces 179 and 180 are printed on the left side or the right side while leaving the conductive pieces 175 and 178. Next, as shown in FIG. 79, preferably, the conductive piece 179 for 1/4 turn is connected to the conductive piece 178 in the counterclockwise direction to extend printing, and at the same time,
Preferably, the conductive piece 180 for 1/4 turn is connected to the conductive piece 175 in the clockwise direction to extend the printing, and one set of clockwise conductive pieces 180 for forming coil windings and three sets of counterclockwise coils are provided. connect the windings forming conductive strip 179 at a connection portion T _3, as in the 80th diagram a magnetic piece is printed substantially in the center, if necessary, 79
The same end connection as shown in the figure was performed again, and the magnetic piece was connected as shown in FIG. 81.
181 is printed on almost the entire surface, the laminate is sintered in a firing furnace,
The necessary external lead-out terminals are baked to obtain a composite wound multilayer inductor having four sets of conductive pieces for forming coil windings according to the present invention.

The embodiment of the composite wound laminated inductor according to the present invention has been described above. However, it is also possible to reduce the distributed capacitance between the conductive pieces by appropriately shifting and printing the conductive pieces for forming the coil winding. It will be apparent that the size, shape and the like of the conductive piece can be arbitrarily changed.

For composite wound laminated inductor according to the invention Advantageous Effects according to the present invention] is shown in FIG. 1-FIG. 26, to explain the effects of the present invention, an end portion P ₂ as finally Figure 25, S When connected with _2, comprises a laminated steps up first Figure-7 Figure, the coil winding and consists of conductive strips P ₁ to P ₂ counterclockwise from Migimawari conductive strips S ₁ to S ₂ The counter-clockwise coil windings to be driven are the ends P ₂ and S ₂
In this way, a coil winding that constantly circulates in a certain direction is formed, and the direction of the magnetic flux generated when current flows through the coil winding is oriented in the same direction. Are obtained four times the inductance of bifilar coils whose directions are opposite to each other. The same applies to the second embodiment shown in FIGS. 28 to 62. However, in the embodiment of FIG. 3, since four sets of conductive pieces for forming the coil winding are used, an effect that 16 times the inductance of the conventional bifilar coil can be obtained is obtained.

Incidentally, if the thickness of the magnetic piece is smaller than the thickness of the conventional magnetic layer and preferably about half of the conventional thickness, the lamination thickness can be reduced to the same lamination thickness as the conventional one and the conventional winding number can be reduced. There is an effect that twice or four times the number of windings (thus, four or sixteen times the conventional inductance) can be obtained. Although the preferred embodiment of the present invention has been described above, various modifications and applications are possible without departing from the technical idea of the present invention. For example, in the preferred embodiment of the present invention, although the number of sets of coil windings has been described as being two or four even sets, at least two of the plurality of sets of coil windings are turned around in the opposite direction. It will be clear that what is connected is to be included within the spirit of the invention. The present invention includes not only the case where the coil windings of the opposite sets are connected at the beginning or end of each coil winding but also the case where the coil windings are connected in the middle of the coil windings. .

[Brief description of the drawings]

1 (a) to 26 (a) are plan views illustrating the steps of manufacturing a composite wound laminated inductor according to the present invention. 1 (b) to 26 (b) are cross-sectional views illustrating the steps of manufacturing the composite wound laminated inductor according to the present invention. FIG. 27 is an equivalent circuit diagram of the composite wound laminated inductor according to the present invention obtained by the manufacturing steps of FIGS. 1 (a) to 26 (a). 28 (a) to 62 (a) are cross-sectional views illustrating the steps of manufacturing another composite wound laminated inductor according to the present invention. 28 (b) to 62 (b) are cross-sectional views illustrating the steps of manufacturing another composite wound laminated inductor according to the present invention. FIG. 63 is an equivalent circuit diagram of a composite wound laminated inductor obtained by the manufacturing steps of FIGS. 28 (a) to 53 (a). FIGS. 64 to 81 are plan views illustrating the steps of manufacturing still another composite wound laminated inductor according to the present invention. FIG. 82 is an equivalent circuit diagram of the composite wound laminated inductor obtained by the manufacturing steps of FIGS. 64 to 81. FIGS. 83 (a) to 96 (a) are plan views illustrating the steps of manufacturing a conventional laminated inductor. FIGS. 83 (b) to 96 (b) are cross-sectional views illustrating the steps of manufacturing a conventional laminated inductor. FIG. 97 is an equivalent circuit diagram of a conventional laminated inductor obtained by the manufacturing steps of FIGS. 83 (a) to 96 (a). 98 to 106 are plan views illustrating the steps of manufacturing a conventional transformer-type laminated inductor. FIG. 107 is an equivalent circuit diagram of a transformer-type laminated inductor obtained by the manufacturing steps of FIGS. 98 to 106. 108 to 112 are plan views illustrating the steps of manufacturing another conventional transformer-type laminated inductor.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-24407 (JP, A) JP-A-58-34905 (JP, A) JP-A-59-22304 (JP, A) JP-A 57-34 69714 (JP, A) Japanese Utility Model Application Showa 59-103409 (JP, U) Japanese Utility Model Application Showa 60-9921 (JP, U) Japanese Patent Publication No. 57-39521 (JP, B1) (58) Fields surveyed (Int. ⁷ , DB name) H01F 17/00 H01F 27/28 H01F 41/04

Claims (9)

(57) [Claims] An alternating laminate of a plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils, wherein the insulating piece is an alternate laminate of a central insulating piece and insulating pieces on both sides thereof. The conductive pieces of each set are connected to the adjacent conductive pieces in sequence through the edge of the insulating piece to the insulating piece on one side, then to the insulating piece on the center and then to the insulating piece on the opposite side to form one coil. Wherein the plurality of sets of coils circumvent substantially around a common axis, and at least two of the plurality of sets have a peripheral circuit having substantially the same size. The other set of conductive pieces are stacked so as to overlap with each other at two places in the stacking direction so as to form spirals in opposite directions to each other. A composite wound lamination in which the ends are connected to each other. Kuta. 2. An alternating laminated body of a plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils, wherein the insulating piece is an alternating laminated body of a central insulating piece and insulating pieces on both sides thereof. The conductive pieces of each set are connected to the adjacent conductive pieces in sequence through the edge of the insulating piece to the insulating piece on one side, then to the insulating piece on the center and then to the insulating piece on the opposite side to form one coil. Wherein the plurality of sets of coils circumvent substantially around a common axis, and at least two of the plurality of sets have a peripheral circuit having substantially the same size. The other set of conductive pieces are stacked so as to overlap with each other at two places in the stacking direction so as to form spirals in opposite directions to each other. At the end, they are connected to each other and are adjacent to each other among the plurality of insulating pieces. Composite wound laminated inductor, characterized in that the edge pieces are to be configured in complementary shape. 3. The composite wound multilayer inductor according to claim 1, wherein the insulating piece is an insulating magnetic material or a magnetic material having a surface coated with an insulating material. 4. The method according to claim 1, wherein the whole is sintered.
4. The composite wound multilayer inductor according to any one of the above items 3. 5. A plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils that circumvent substantially around a common axis are alternately formed by using a paste of insulator powder and a paste of conductive powder. In producing a composite wound laminated inductor by printing and laminating, an insulating piece is printed on an easily peelable substrate, and a plurality of sets of conductive pieces on which at least two sets generate reverse winding are formed by printing. A pair of insulating pieces are printed and formed on both ends of the substrate, leaving the ends of the conductive pieces thereon,
Another plurality of conductive pieces having a starting end connected to the corresponding end of the plurality of conductive pieces are formed by printing on the pair of insulating pieces, and the pair of insulating pieces are substantially formed on the central side of the base body. One complementary piece that is complementary is printed, and the same process is repeated as many times as necessary. At this time, the circuit of each set of the conductive pieces is made to have substantially the same size, and the other set of circuits is formed in each circuit. The conductive pieces and the two places are laminated so as to overlap each other in the laminating direction so as to form spirals in opposite directions to each other, and finally, an insulating piece is printed and formed on the entire surface of the thus laminated product. A method of manufacturing a composite wound multilayer inductor, comprising: first, middle, or last, connecting at least two sets of reverse-wound coils by printing at adjacent portions, and finally peeling off from the substrate. 6. A plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils that circumvent substantially about a common axis are alternately formed by using a paste of insulator powder and a paste of conductive powder. In producing a composite wound laminated inductor by printing and laminating, an insulating layer is formed by printing on an easily peelable substrate, and a plurality of sets of conductive pieces are formed on the insulating layer by forming at least two sets of opposite windings. A pair of insulating pieces are printed and formed thereon, leaving the ends of the conductive pieces thereon, and the other plurality of sets of conductive pieces having a starting end connected to the corresponding end of the plurality of sets of conductive pieces are formed by the pair. A print is formed on the insulating piece, and a central insulating piece is printed and formed so as to have a complementary shape to the insulating piece while leaving the ends of the other plurality of conductive pieces having the start end. Iteratively, in that case, of each set of said conductive pieces The circuits are made to have substantially the same size, and in each of the peripheral circuits, they are stacked so that they overlap with the other set of conductive pieces at two places in the stacking direction so as to form spirals in opposite directions, and finally stacked in this way. The insulation piece is printed and formed on the entire surface of the product, and the first, middle, and
Alternatively, at the end, the at least two sets of reverse-wound coils are connected to each other by printing at adjacent portions, and finally peeled off from the substrate. 7. The method of manufacturing a composite wound laminated inductor according to claim 5, wherein the laminated inductor is further sintered after the lamination. 8. A plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils orbiting around a common axis by a vapor phase method such as a sputtering method using a mask having a predetermined shape. Are alternately printed and laminated to produce a composite wound laminated inductor, an insulating layer is formed on a substrate, and a plurality of sets of conductive pieces are formed thereon, at least two sets of which produce reverse winding with each other. Forming a pair of insulating pieces leaving the end of the conductive piece to form a plurality of other sets of conductive pieces having a starting end connected to the plurality of sets of corresponding ends on the pair of insulating pieces, One insulating piece that is substantially complementary to the pair of insulating pieces is printed on the center side of the base, and the same process is repeated as many times as necessary. Reverse each other so that they overlap each other in the stacking direction Wherein the at least two sets of reverse-wound coils are connected to each other at a close portion at the beginning, middle, or end of the laminating step. Manufacturing method. 9. A plurality of sets of conductive pieces and a plurality of insulating pieces for forming a plurality of sets of coils circling substantially around a common axis by a gas phase method such as a sputtering method using a mask having a predetermined shape. In order to manufacture a composite wound laminated inductor by alternately printing and laminating, an insulating layer is formed on a base, and a plurality of sets of conductive pieces are formed thereon, at least two sets of which generate reverse winding with each other. In each of the peripheral circuits, the other set of conductive pieces are stacked so as to overlap each other at two places in the stacking direction so as to form spirals in opposite directions to each other, and a pair of conductive pieces is left thereon, except for the end of the conductive piece. A plurality of sets of conductive pieces having a starting end connected to the plurality of sets of corresponding ends are formed on the insulating piece, and a plurality of sets of other conductive pieces having the ends are formed. Leaving a terminal end and having a shape complementary to the conductive piece Forming a central insulating piece, and a required number of times repeated similar steps or less, even the first of the lamination process, the intermediate,
Or finally, a method of manufacturing a composite wound laminated inductor, wherein the at least two sets of reverse wound coils are connected to each other at a close portion.