WO2005031766A1 - 積層型磁性部品を内蔵した多層積層基板 - Google Patents
積層型磁性部品を内蔵した多層積層基板 Download PDFInfo
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- WO2005031766A1 WO2005031766A1 PCT/JP2003/012433 JP0312433W WO2005031766A1 WO 2005031766 A1 WO2005031766 A1 WO 2005031766A1 JP 0312433 W JP0312433 W JP 0312433W WO 2005031766 A1 WO2005031766 A1 WO 2005031766A1
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- laminated
- magnetic
- winding
- multilayer
- inductor
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- 238000004804 winding Methods 0.000 claims description 236
- 239000000758 substrate Substances 0.000 claims description 63
- 238000003475 lamination Methods 0.000 claims description 36
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- 239000000696 magnetic material Substances 0.000 claims description 9
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- 238000004806 packaging method and process Methods 0.000 abstract 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0033—Printed inductances with the coil helically wound around a magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0066—Printed inductances with a magnetic layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
Definitions
- Multilayer laminated substrate with built-in laminated magnetic components Multilayer laminated substrate with built-in laminated magnetic components
- the present invention relates to a multilayer laminated substrate in the field of semiconductor technology, and more particularly, to a multilayer type magnetic component in which a coil and a core are formed by using a thick film forming technology.
- FIG. 12 is an exploded perspective view showing a conventional integration transformer.
- FIG. 13 is a vertical sectional view taken along the line VIII-VIII in FIG. 12 after lamination. The following is a description based on these drawings.
- the conventional laminated transformer 80 includes a magnetic sheet 82b, 82d for primary winding on which primary windings 81a, 81c are formed, and a secondary winding 81b, 81d. And magnetic sheets 82a and 82g for sandwiching the magnetic sheets 82b to 82e, respectively. .
- a magnetic sheet 82 f for improving magnetic saturation characteristics is interposed between the magnetic sheet 82 e and the magnetic sheet 82 g.
- the magnetic sheets 82a to 82e are connected to the through holes 90, 91, 92 connecting the primary windings 81a, 81c and the secondary windings 81b, 81d. Through holes 93, 94, 95 are provided.
- the magnetic sheets 82a to 82g are the core of the laminated transformer 80.
- FIGS. 12 and 13 are schematic diagrams, strictly speaking, the number of turns of the primary windings 8 1 a and 8 1 c and the secondary windings 8 1 b and 8 1 d ⁇ through hole 9 0 W
- the external electrodes 9 9 ⁇ through-holes 9 5 ⁇ secondary winding 8 1d ⁇ through winding 94 4 ⁇ secondary winding, wire 8 1 b ⁇ snoring-horning 9 3 ⁇ external The current flows in the order of the electrodes 98,, and vice versa.
- the current flowing through the primary windings 81a and 81c generates a magnetic flux 100 (Fig. 13) in the magnetic sheets 82a to 82g.
- the magnetic flux 100 generates an electromotive force corresponding to the turn ratio in the secondary windings 81b and 81d.
- the laminated transformer 80 operates.
- the self-inductance of the primary windings 81a and 81c is L1
- the self-inductance of the secondary windings 81b and 81d is L2
- the primary windings 81a and 81c are defined by the following equation.
- the electromagnetic coupling coefficient k is one of the indicators of transformer performance. The larger the value, the smaller the leakage magnetic flux (leakage inductance), and the higher the power conversion efficiency.
- the conventional multilayer inductor has the same configuration as the multilayer transformer 80 except that the secondary windings 8 1 b and 81 d are not provided.
- the laminated transformer 80 has been mounted on a printed wiring board as a thin transformer, for example, which is sealed with resin.
- a printed wiring board as a thin transformer, for example, which is sealed with resin.
- the current capacity of the winding is small.
- the current capacity of the winding is roughly proportional to the conductor cross-sectional area of the winding.
- the conductor cross-sectional area of the winding is “film thickness X-ray width”.
- screen printing cannot make the film thickness too large. Even if the film thickness is increased, unevenness becomes severe, and it becomes difficult to stack the layers accurately.
- the line width is widened, the number of turns will decrease accordingly. Further, since the winding is located at the center of the laminated body made of the magnetic sheet, heat dissipation is poor. This has the effect of reducing the current allowance of the winding.
- Figure 14 [1] shows a conventional multilayer inductor 60.
- windings 62a to 62c are sandwiched between magnetic sheets 61a to 61d.
- eddy currents 64a to 64d are generated in the plane direction of the magnetic sheets 61a to 61d. Therefore, the materials of the magnetic sheets 61a to 61d are limited to those having high electrical resistivity.
- Figure 14 [2] shows conventional multilayer inductors 65 and 66.
- the laminated inductor 65 has windings 68 a and 68 b sandwiched between magnetic sheets 67 a to 67 c, and the laminated inductor 66 has the same magnetic sheet 67 a to 67 c
- the windings 68c and 68d were sandwiched between them.
- the windings 68a and 68b generate a magnetic flux 69a
- the windings 68c and 68d generate a magnetic flux 69b.
- two laminated inductors 65 and 66 are formed on a laminated body composed of the same magnetic sheets 67a to 67c, they interfere with each other. The reason is that since the upper and lower ends of the windings 68a and 68b are open, the magnetic flux 70 leaks from the uppermost and lowermost magnetic sheets 67a and 67c.
- a main object of the present invention is to provide a technique for realizing further miniaturization of an electronic device by making full use of the advantages of the multilayer inductor and the multilayer transformer being light and small in thickness.
- Another object of the present invention is to provide a multilayer laminated substrate having a built-in laminated magnetic component which can solve the above-mentioned problems of the conventional laminated inductor and laminated transformer. Disclosure of the invention
- a multilayer laminated substrate includes a wiring sheet on which a wiring pattern is formed and includes a multilayer inductor.
- the laminated inductor is composed of a plurality of laminated magnetic sheets, at least a pair of opposed through holes provided in the magnetic sheets, and a stacking direction including a conductor filled in the through holes. Wiring, at least a pair of opposing planar wirings formed on the uppermost surface and the lowermost surface of the magnetic sheet, and a winding spirally formed by the planar wiring and the laminating wiring. It is a thing.
- the wiring sheet further includes a thick-film component sheet in which a thick-film component is formed, wherein the thick-film component is formed on or under the multilayer sheet, the multilayer inductor is provided in a part of the wiring sheet.
- the chip component may be mounted on the surface.
- the multilayer inductor was resin-sealed and mounted on a printed wiring board.However, there is a limit to reducing the size of the multilayer inductor package and reducing the wiring between the multilayer inductor and other components. Had reached. There Thus, in the present invention, the multilayer inductor is built in the multilayer multilayer substrate.
- the package of the laminated inductor is omitted.
- wiring can be performed in the stacking direction, the area occupied by the wiring is reduced, so that the wiring between the stacked inductor and other components is minimized.
- one end of the first stacked wiring is connected to one end of the first flat wiring
- the other end of the first flat wiring is connected to one end of the second stacked wiring.
- the other end of the second wiring in the stacking direction is connected to one end of the second wiring in the plane direction, and so on.
- the odd-numbered lamination direction wiring and the even-numbered lamination direction wiring face each other, and the odd-numbered planar wiring and the even-numbered planar wiring are opposed to each other.
- the winding is formed in a spiral from at least a pair of opposing stacked wirings and at least a pair of opposing planar wirings.
- the multilayer inductor in the multilayer substrate according to the present invention has the following features.
- the current capacity of the winding is large.
- the current capacity of a winding is roughly proportional to the conductor cross-sectional area of the winding. Since the conductor cross-sectional area of the wiring in the stacking direction is the area of the through hole, it can be increased arbitrarily.
- the conductor cross-sectional area of the planar wiring has the same “film thickness X-ray width” as in the past. However, since only two layers are required in the planar direction (in the case of a single winding or multiple windings on the same plane), even if the wiring is slightly thick, unevenness does not matter.
- the planar wiring surrounds the center of the laminated body made of the magnetic sheet as a core, and therefore is located around the laminated body. This has the effect of increasing the heat dissipation of the planar wiring and thus increasing the current capacity of the winding.
- a high inductance value is obtained.
- the wiring in the plane direction and the wiring in the stacking direction may be reduced. At this time, for example, by increasing the occupied area of the multilayer inductor, it is possible to increase the number of wirings regardless of the number of stacked layers. Thus, the inductance value can be easily increased.
- a dielectric film made of a non-magnetic material may be formed between each magnetic sheet and an adjacent magnetic sheet.
- the eddy current loss can be reduced for the magnetic flux traveling in the plane direction.
- a magnetic flux that inevitably travels in the laminating direction is generated, so that the effect is not significant even if a dielectric film is interposed between magnetic sheets.
- all the magnetic fluxes travel in the plane direction, so that the effect of interposing the dielectric film between the magnetic sheets appears remarkably.
- a material having a low electric resistivity can be used for the magnetic sheet, so that the range of material selection can be widened.
- a dielectric film may be formed on the inner wall surface of the through hole.
- the “non-magnetic material” means a substance having a magnetic permeability at least smaller than that of the magnetic sheet.
- the “dielectric film” means a film having at least a higher electrical resistivity than the magnetic sheet, and may be called a dielectric film or an insulating film.
- the laminated inductor may have a shape in which both ends of the winding are open.
- the shape in which both ends of the winding are open is, for example, a solenoid shape.
- the magnetic flux jumping out from one end of the winding passes through the magnetic sheet and returns to the other end of the winding, so that the entire magnetic sheet becomes a magnetic path. Therefore, the magnetic saturation characteristics are improved.
- the laminated inductor may have a shape in which both ends of the winding are closed. That is, the winding core is a closed magnetic path in which the planar wiring and the lamination direction wiring are uniformly wound at equal intervals, and the magnetic flux is confined. In this case, since the magnetic flux is confined in the winding and does not leak out of the winding, the magnetic shielding effect is excellent. As a result, even if multiple laminated inductors are formed on the same magnetic sheet, they do not interfere with each other. Therefore, electronic It is effective for high-density integration of components.
- the winding may be annular.
- a conventional laminated inductor it is difficult to form a circular core because the diameter of the circular ring is in the laminating direction.
- the diameter of the ring is in the plane direction, so that the ring can be made any size. Therefore, the production is easy and the inductance value can be increased arbitrarily.
- the winding can be formed at any angle with respect to the ring, the ring and the winding can always be perpendicular to each other. Therefore, the leakage magnetic flux due to the winding direction is extremely small.
- the toroidal winding has a uniform curvature in each of its cross sections, a smoothly connected magnetic flux can be formed, so that magnetic flux disturbance and non-uniformity can be minimized. Therefore, a laminated inductor having an extremely small leakage magnetic flux can be easily realized.
- the toroidal winding has the advantage that the characteristics as calculated can be easily obtained.
- the reason for this is that the turbulence of the magnetic flux ⁇ the non-uniformity is suppressed, and the calculation is simplified.
- the inductance L is given by the following equation.
- the multilayer laminated substrate according to a preferred embodiment has a built-in laminated inductor, in which a plurality of laminated inductors are provided on the same magnetic sheet, and measures are taken to prevent magnetic interference between the laminated inductors at this time.
- a multilayer laminated substrate according to a preferred embodiment is provided with one laminated inductor having a shape in which both ends of a winding are open, and one laminated inductor formed of a winding sandwiched between the magnets on the same magnetic sheet. It has been done.
- the magnetic flux travels in a plane direction.
- the latter multilayer inductor is a conventional multilayer inductor (see Figs. 12 and 13), and the magnetic flux mainly advances in the stacking direction. That is, from the winding of one multilayer inductor The generated magnetic flux is unlikely to link with the windings of other multilayer inductors. Therefore, there is little magnetic interference between the multilayer inductors.
- the multilayer laminated substrate includes at least one first laminated inductor having both ends closed and one second laminated inductor having both ends opened on the same magnetic sheet.
- An inductor or one third laminated inductor composed of windings sandwiched between the magnetic sheets is provided.
- the magnetic flux is confined in the winding. Therefore, magnetic interference between the first multilayer inductor and the second multilayer inductor or magnetic interference between the first multilayer inductor and the third multilayer inductor is small.
- the multilayer laminated substrate in a preferred embodiment is one in which a plurality of laminated inductors having both ends of a winding closed are provided on the same magnetic sheet.
- Each laminated inductor has a magnetic flux confined within the winding. Therefore, magnetic interference between the laminated inductors is small.
- a multilayer laminated substrate is a laminated inductor built in a multilayer laminated substrate, wherein a plurality of laminated inductors are provided on a magnetic sheet and another magnetic sheet directly laminated on or under the magnetic sheet. In this case, measures are taken to prevent magnetic interference between the laminated inductors.
- the multilayer laminated board with a built-in multilayer transformer is a multilayer laminated board in which primary windings and secondary windings are used instead of windings and multilayer transformers are used instead of the multilayer inductors.
- a multilayer laminated board including a laminated transformer, wherein at least one laminated inductor is replaced by a primary winding and a secondary winding in at least one laminated inductor.
- the laminated inductor is replaced with a laminated transformer.
- First made of conductor At least a pair of opposing first planar wirings formed on the uppermost surface and the lowermost surface of the magnetic sheet; a first planar wiring and the first laminated wiring.
- a primary winding spirally formed by the directional wiring, at least a pair of opposed second through holes provided in the magnetic sheet, and a second conductor formed of a conductor filled in the second through holes.
- a secondary winding magnetically coupled to the primary winding.
- the primary winding and the secondary winding are necessarily wound on the same core.
- the electromagnetic coupling coefficient can be greatly improved.
- the effect becomes conspicuous when an annular core is used.
- the multilayer laminated board which concerns on this invention, since a laminated inductor or laminated transformer is built in, the package of a laminated transformer can be omitted and the wiring of a laminated inductor or laminated transformer and other components is minimized. Can be Therefore, since the advantages of the multilayer inductor or the transformer being light and small and thin can be fully utilized, further miniaturization of the electronic device can be realized.
- the laminated sheet and the planar wiring having a specific shape are formed on the magnetic sheet, and the planar wiring and the laminated direction are formed.
- the following effects are obtained by forming a spiral winding by wiring.
- the allowable current of the winding can be increased. The reason is that firstly, lamination This is because the conductor cross-sectional area of the directional wiring can be increased arbitrarily. Second, since the number of stacked planar wirings is small, unevenness is not a problem even if the planar wiring is made somewhat thicker. Third, because the planar wiring is located around the laminate, the planar wiring has good heat dissipation.
- the winding is formed to have both ends open and another magnetic sheet is provided in contact with the wiring in the plane direction, so that the magnetic saturation characteristics can be improved.
- a ring inductor and a ring transformer which were practically impossible with conventional multilayer inductors and transformers, can be realized.
- the reason is that the diameter of the ring is in the stacking direction in the prior art, whereas the diameter of the ring is in the plane direction in the present invention.
- the winding is in an annular shape, the turbulence of the magnetic flux and the non-uniformity can be suppressed to the utmost, so that a laminated inductor with extremely small leakage flux and a laminated transformer with an extremely large electromagnetic coupling coefficient can be easily realized.
- FIG. 1 is an exploded perspective view showing a first embodiment of a multilayer laminated substrate according to the present invention
- FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG. 1 after lamination
- FIG. 3 is a partial perspective view showing only the primary winding in FIG. 1 after lamination
- FIG. 4 is a plan view showing only the primary winding and the secondary winding in FIG. 1 after lamination.
- FIG. 5 is a process chart showing a method for manufacturing the laminated transformer of FIG.
- FIG. 6 is an exploded perspective view showing a second embodiment of the multilayer laminated substrate according to the present invention
- FIG. 7 is a longitudinal sectional view taken along line VII-VII in FIG. 6 after lamination.
- FIG. 8 is a plan view showing a third embodiment of the multilayer transformer according to the present invention.
- FIG. 9 is a plan view showing a fourth embodiment of the multilayer transformer according to the present invention.
- FIG. 10 is a plan view showing a fifth embodiment of the multilayer transformer according to the present invention.
- FIG. 11 is a plan view showing fourth and fifth embodiments of the multilayer transformer according to the present invention.
- FIG. 11 [1] is a first example of a multilayer inductor
- FIG. 11 [2] is a multilayer inductor
- Fig. 11 [3] is a third example of a multilayer inductor.
- FIG. 12 is an exploded perspective view showing a conventional laminated transformer
- FIG. 13 is a longitudinal sectional view taken along line VIII-VIII in FIG. 12 after lamination.
- FIG. 14 is an explanatory diagram showing a problem of the conventional technology.
- FIG. 14 [1] is an explanatory diagram of eddy current
- FIG. 14 [2] is an explanatory diagram of leakage magnetic flux
- FIG. 3] is an explanatory diagram of an angle formed between the ring and the winding.
- the laminated inductor has almost the same configuration as the laminated transformer having one of the primary winding and the secondary winding. Therefore, for a multilayer inductor, the product The description of the layer transformer will be omitted.
- the illustrated Z direction is the stacking direction
- the X and Y directions are plane directions.
- FIG. 1 is an exploded perspective view showing a first embodiment of a multilayer laminated substrate according to the present invention.
- FIG. 2 is a vertical sectional view taken along the line II-II in FIG. 1 after lamination.
- FIG. 3 is a partial perspective view showing only the primary winding in FIG. 1 after lamination.
- FIG. 4 is a plan view showing only the primary winding and the secondary winding in FIG. 1 after lamination. In FIG. 2, the laminating direction is shown larger than the planar direction.
- the multilayer laminated board 10A of the present embodiment includes a laminated transformer 10, a thick film component sheet 30 on which a thick film component is formed, and a wiring sheet 50 on which a wiring pattern is formed, in this order. They are stacked.
- the package of the laminated transformer 10 is omitted by incorporating the laminated transformer 10, and the wiring between the laminated transformer 10 and other components is minimized. .
- the reason is that since the entire multilayer laminated substrate 10A is packaged, the package of the multilayer transformer 10 is not required.
- the laminated transformer 10 may be provided in a part of the wiring sheet as in a second embodiment described later.
- the laminated transformer 10 includes a plurality of laminated magnetic sheets 11 a to 11 i, magnetic sheets 11 b to 11 i provided with through holes 12 a to 12 d, and a through hole 1.
- 2a to 12d Laminated directional wiring 13a to 13d made of conductive material, and planar wiring 1 formed on the plane of magnetic sheets lib, 11c, llf and 11g 4a to 14d, a secondary winding 15 composed of planar wirings 14a and 14d and a laminating wiring 13a and 13d, and planar wirings 14b, 14c and And a primary winding 16 composed of wirings 13 b and c in the stacking direction.
- the magnetic sheet laminated between the magnetic sheet 11 d and the magnetic sheet 11 e is not shown, but is not shown. Same as lid, lie.
- the laminated transformer 10 is composed of a plurality of laminated magnetic sheets 11 c to 11 f and ten pairs of opposed snoring holes provided on the magnetic sheets 11 c to 11 f 1 2 b , 12 c, lamination direction wirings 13 b, 13 c composed of conductors filled in the snorkels 12 b, 12 c, the upper surface of the magnetic sheet 11 f and the magnetic sheet 11 c
- the lamination direction wirings 13a, 13d made of a conductor filled in the through holes 12a, 12d, the upper surface of the magnetic sheet 11g and the upper surface of the magnetic sheet 11b
- the primary winding 16 and the secondary winding 15 have a solenoid shape with both ends open.
- Magnetic sheets 11a and 11b that are magnetic paths are provided in contact with planar wiring 14a
- magnetic sheets 11h and 11i that are magnetic paths are provided in contact with planar wiring 14d.
- a magnetic sheet 11 a to 11 c is provided which is in contact with the planar wiring 14 b and serves as a magnetic path
- a magnetic sheet 11 g to 11 i which is in contact with the planar wiring 14 c and serves as a magnetic path Is provided.
- the thick film component sheet 30 exemplifies a low-pass filter for blocking high-frequency noise at the secondary winding 15.
- the thick-film component sheet 30 is composed of a laminated ink composed of the magnetic sheets 1, 1 i, 11 j and the coil winding 31. It has a ductor 32 and a thick film capacitor 34 composed of a dielectric sheet 36a having a high dielectric constant and parallel plate electrodes 33a and 33b.
- the current flowing through the coil winding 31 generates a magnetic flux 35 (FIG. 2) in the magnetic sheets 11 i and 11 j.
- the voltage applied between the parallel plate electrodes 33'a and 33b causes charges to be accumulated in the parallel plate electrodes 33a and 33b.
- the wiring sheet 50 has the external electrodes 22 to 25 of the laminated transformer 10, the wiring lines 51, the component lands 52, and the thick film resistor on the upper surface of the low dielectric constant dielectric sheet 36 b as an insulating substrate.
- the container 53 is formed.
- a chip component 54 (FIG. 2) and the like are mounted.
- the laminated inductor 32 is a conventional laminated inductor (see FIGS. 12 and 13) including a winding 31 sandwiched between magnetic sheets 11 i, 11 ⁇ , and a magnetic flux 3 in the winding 31. 5 advances in the stacking direction.
- the laminated transformer 10 the magnetic flux 26 in the primary winding 16 and the secondary winding 15 advances in the plane direction. That is, the magnetic flux 35 generated from the laminated inductor 32 is unlikely to interlink with the primary winding 16 and the secondary winding 15 of the laminated transformer 10.
- the magnetic flux 26 generated from the multilayer transformer 10 is difficult to interlink with the winding 31 of the multilayer inductor 32. Therefore, the multilayer inductor 32 and the conventional multilayer transformer 80 (Fig. 12 and FIG. 13), the magnetic interference between the multilayer inductor 32 and the multilayer transformer 10 is small. Therefore, there is no need to interpose a dielectric sheet for obtaining magnetic insulation between the multilayer inductor 32 and the multilayer transformer 10.
- the current carrying capacity of the primary winding 16 and the secondary winding 15 can be easily increased.
- the current carrying capacity of the primary winding 16 and the secondary winding 15 is approximately proportional to the conductor cross-sectional area.
- the conductor cross-sectional area of the lamination direction wirings 13a to 13d is as large as the area of the through holes 12a to 12d, and can be increased as much as possible.
- the conductor cross-sectional areas of the planar wirings 14a to 14d have the same “film thickness X-ray width” as in the past. However, since only four layers are required for the planar wirings 14a to 14: 'd, even if the wiring is slightly thick, the unevenness does not matter.
- planar wirings 14a to 14d surround the stacked body composed of the magnetic sheets 11a to 11i as a core, so that they are located around the stacked body. Since this improves the heat dissipation of the planar wirings 14a to 14d, it works in the direction of increasing the allowable current of the primary winding 16 and the secondary winding 15.
- the multilayer transformer 10 a high inductance value can be obtained.
- it is necessary to reduce the number of turns of the primary winding 16 and the secondary winding 15. It is sufficient to increase the number of wirings 13 a to 13 d in the stacking direction.
- the number of wirings can be increased irrespective of the number of laminated layers, so that the inductance value can be easily increased.
- the magnetic sheet 11a-: Lie, llg-: Lli is provided in contact with the planar wirings 14a to 14d, so that the area to be a magnetic path is formed. The magnetic saturation characteristics are excellent.
- a dielectric film made of a non-magnetic material may be interposed between each magnetic sheet 11 a,... And an adjacent magnetic sheet.
- the eddy current loss can be reduced with respect to the magnetic flux 26 traveling in the plane direction.
- Such a dielectric film may be formed by a simple method such as coating, dipping, and spraying.
- FIG. 5 is a process chart showing a method for manufacturing the multilayer laminated substrate of FIG.
- description will be given based on FIG. 1 and FIG.
- a magnetic slurry is prepared (Step 61).
- the magnetic material is, for example, a Ni-Cu-Zn system.
- a magnetic material sheet is formed by placing a magnetic material slurry on a PET (polyethylene terephthalate) film using a doctor blade method (step 62).
- the magnetic sheets 11a to 11j are obtained by cutting the magnetic sheet (step 63).
- a nonmagnetic slurry having a low dielectric constant and a high dielectric constant is separately prepared (step 64).
- a non-magnetic material sheet is formed by placing the non-magnetic material slurry on the PET film using the doctor blade method (step 65).
- the nonmagnetic sheet is cut to obtain dielectric sheets 36a to 36b (step 66).
- the dielectric sheet 36a has a high dielectric constant
- the dielectric sheet 36b has a low dielectric constant.
- through holes 18 are formed on the magnetic sheets 11a to 11j and the dielectric sheets 36a and 36b by pressing or the like (step 67).
- a thick film resistor 53 is formed by screen-printing a resistor paste only on the dielectric sheet 36b (step 68).
- an Ag-based conductive paste is screen-printed on the magnetic sheets lla to llj and the dielectric sheets 36a and 36b, so that the primary winding 16 and the secondary winding 15 and the coil winding are printed.
- Line 31, wiring line 51, component land 52, etc. are formed, and through-holes 18, ... are filled with a conductor (process 69).
- the magnetic sheets 11a to: L1j and the dielectric sheets 36a and 36b are peeled off from the PET film and laminated, and these are adhered to each other using a hydrostatic press to form a multilayer laminated substrate 10A.
- the multilayer laminated substrate 10A is cut into a predetermined size (Step 71).
- simultaneous firing is performed at around 900 ° C. (Step 72).
- the magnetic sheets 11a, ... have a film thickness of 80 ⁇ , a width of 8 mm, and a depth of 6 mm.
- the film thickness is 12 m
- the line width is 200 m
- the distance between the lines is 15 ⁇ .
- the diameter of the through holes 12a to 12d is "" m.
- the practical number of laminated sheets of the laminated transformer 10 is about 10 to 50 sheets.
- FIG. 6 is an exploded perspective view showing a second embodiment of the multilayer laminated substrate according to the present invention.
- FIG. 7 is a vertical sectional view taken along the line VII-VII in FIG. 6 after lamination.
- description will be made based on these drawings. However, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted.
- the multilayer laminated substrate 100 of the present embodiment has a laminated transformer 10 laminated on a wiring sheet 101 on which a wiring pattern is formed.
- the package of the multilayer transformer 10 is omitted, and the wiring between the multilayer transformer 10 and other components is minimized.
- the wiring sheet 101 may be stacked on the multilayer transformer 10 as in the first embodiment described above.
- the wiring sheet 101 is formed by laminating a large number of dielectric sheets 102 a, 102 b, 102 c,... On the top surface of the uppermost dielectric sheet 102a, external electrodes 122 to 125 of multilayer transformer 10, wiring line 103, component land 104, thick film resistor 105, etc. are formed.
- a chip component 106 (FIG. 7) and the like are mounted on the component land 104.
- a chip component 106 (FIG. 7) and the like are mounted in the inner dielectric sheets 102b, 102c, ... (Fig. 7).
- wiring lines 107, through holes 108, thick film resistors 109, etc. are formed in the inner dielectric sheets 102b, 102c, ... (Fig. 7).
- a thick film capacitor and a thick film inductor (not shown) are formed on the wiring sheet 101.
- FIG. 8 is a plan view showing a third embodiment of the multilayer laminated substrate according to the present invention. Hereinafter, description will be made based on this drawing.
- the multilayer laminated substrate of the present embodiment is the same as the first and second embodiments except for the laminated transformer 40. Therefore, only for the multilayer transformer 40 explain.
- the laminated transformer 40 includes a magnetic sheet 41 having a plurality of laminated sheets, a plurality of pairs of opposed through holes 42 b, 42 c provided in the magnetic sheet 41, and a through hole 42 b, 4 2 b, lamination direction wiring made of a conductor filled in 4 c, and a plurality of pairs of opposing plane wirings formed on the uppermost surface and lowermost surface of the magnetic sheet 4 1 4 4 b , 44 c, a primary winding 46 spirally formed by the planar wirings 44 b, 44 c and the laminating wirings 43 b, 43 c, and provided on the magnetic sheet 41.
- the primary winding 46 and the secondary winding 45 have an annular shape, that is, a shape in which both ends are closed, and are wound around the same core. That is, the cores of the primary winding 46 and the secondary winding 45 are formed such that the planar wirings 44a to 44d and the laminating wirings 43a to 43d are uniformly wound at equal intervals. It has a closed magnetic path in which magnetic flux is confined. In this case, since the magnetic flux is confined in the primary winding 46 and the secondary winding 45 and does not leak out of the primary winding 46 and the secondary winding 45, the magnetic shielding effect is excellent. As a result, even if multiple multilayer inductors and multiple transformers are formed on the same magnetic sheet, they do not interfere with each other. Therefore, it is effective for high-density integration of electronic components.
- the ring can be made any size. Therefore, it is easy to manufacture and The conductance value can be increased arbitrarily. Further, since the primary winding 46 and the secondary winding 45 can be formed at any angle with respect to the ring, the angle formed with the ring can always be a right angle. Therefore, the leakage magnetic flux due to the winding direction is extremely small. Further, since the annular core can form a smoothly connected magnetic flux by bending all sections in the same curvature, the disturbance of the magnetic flux and the non-uniformity can be minimized. Therefore, since the laminated transformer 40 has a very small leakage magnetic flux, the electromagnetic coupling coefficient k can be greatly improved.
- the primary winding 46 and the secondary winding 45 are not limited to an annular shape, but may be a triangular shape, a square shape, a polygonal shape, or the like.
- the materials and dimensions of each component, the overall manufacturing method, and the like are in accordance with the above-described first embodiment.
- FIG. 9 and 11 are plan views showing a fourth embodiment of the multilayer laminated substrate according to the present invention.
- description will be given based on FIG. 9 and FIG.
- the multilayer laminated substrate 130 of the present embodiment is formed of a laminated transformer 10 shown in FIG. 4 and a laminated inductor 140 shown in FIG. It is formed in 1. Therefore, the same parts as those in FIG.
- the laminated inductor 140 shown in Fig. 11 [1] has a winding 141, which is sandwiched by any of a plurality of sheets constituting the magnetic sheet 131, and a magnetic sheet from one end of the winding 141.
- the multi-layer laminated substrate 130 is composed of the same magnetic sheet 13 1, one laminated transformer 10 having both ends of the primary winding 16 and the secondary winding 15 open, and a magnetic sheet 13.
- One laminated inductor 1400 consisting of a winding wire 141 sandwiched between 13 1 is provided.
- the laminated transformer 10 the magnetic flux advances in the plane direction.
- the laminated inductor 140 is a conventional laminated inductor. It is a ductor (see Fig. 11 and Fig. 12), and the magnetic flux advances mainly in the stacking direction.
- the magnetic flux generated from the primary winding 16 and the secondary winding 15 of the multilayer transformer 10 is not easily linked to the winding 14 1 of the multilayer inductor 14 0, and the multilayer inductor 14 0
- the magnetic flux generated from the winding 14 of the laminated transformer 10 is difficult to interlink with the primary winding 16 and the secondary winding 15 of the laminated transformer 10. Therefore, the magnetic interference between the laminated transformer 10 and the laminated inductor 140 is small.
- the laminated inductor 150 shown in FIG. 11 [2] has a plurality of pairs of opposed through-holes 15 1 a and 15 1 b provided on the magnetic sheet 13 1 and a through-hole 15 1 a 15 2 a, 15 2 b made of conductive material filled in 15 1 b and a plurality of pairs of opposing planar wires formed on the top and bottom surfaces of magnetic sheet 13 1 15 3 a, 15 3 b; winding 15 5 4 formed in a spiral shape by the planar wiring 15 3 a, 15 3 b and the laminating wiring 15 2 a, 15 2 b; It has external electrodes 15 5 and 15 6 connected to both ends of the winding 15 4.
- the multilayer laminated substrate 130 is composed of the same magnetic sheet 131, one laminated transformer 10 having both ends of the primary winding 16 and the secondary winding 15 open, and the winding 1
- One laminated inductor 150 having a shape in which both ends of 54 are open is provided.
- the axial direction of the primary winding 16 and the secondary winding 15 and the axial direction of the winding 15 4 are orthogonal to each other at substantially the center of the primary winding 16 and the secondary winding 15. .
- the magnetic flux generated from the primary winding 16 and the secondary winding 15 of the multilayer transformer 10 is not easily linked to the winding 15 4 of the multilayer inductor 15
- the magnetic flux generated from the windings 15 4 is difficult to interlink with the primary winding 16 and the secondary winding 15 of the laminated transformer 10. Therefore, the magnetic interference between the multilayer transformer 10 and the multilayer inductor 150 is small.
- the multilayer inductor 160 shown in Fig. 11 [3] has a plurality of pairs of opposed through-holes 161a and 161b provided on the magnetic sheet 131, and a through-hole 161a,
- the wiring in the direction of lamination 16 2 a, 16 2 b made of a conductor filled in 16 1 b and the uppermost and lowermost surfaces of the magnetic sheet 13 1 Formed in a spiral by a plurality of pairs of planar wirings 16 3 a and 16 3 b facing each other, planar wirings 16 3 a and 16 3 b and stacked wirings 16 2 a and 16 2 b
- the external electrodes 16 5 and 16 6 connected to both ends of the winding 16 4.
- the multilayer laminated substrate 130 is composed of the same magnetic sheet 131, one laminated transformer 10 having both ends of the primary winding 16 and the secondary winding 15 opened, and a winding An annular laminated inductor 160 having both ends closed is provided.
- the magnetic flux is confined in the winding 16 4. Therefore, the magnetic interference between the multilayer inductor 164 and the multilayer transformer 10 is small.
- the laminated transformer 10 and the laminated inductors 140, 150, and 160 can be provided without providing a dielectric sheet or the like for obtaining magnetic insulation. Can be formed on the same magnetic sheet 13 1, so that downsizing can be realized.
- the laminated inductors 140, 150, and 160 may be provided in the laminating direction of the laminated transformer 10.
- the multilayer laminated substrate 130 may be provided in the laminating direction of the wiring sheet or a part of the wiring sheet as in the first and second embodiments.
- FIG. 10 and FIG. 11 are plan views showing a fifth embodiment of the multilayer laminated substrate according to the present invention.
- the Z direction shown is the lamination direction, and the X and Y directions are the plane directions.
- a description will be given based on FIGS. 10 and 11.
- the multilayer laminated substrate 170 of the present embodiment has the same magnetic sheet 4 1 and force S as the laminated transformer 40 shown in FIG. 8 and any of the laminated inductors 140, 150, and 160 shown in FIG. 11. It is formed in. Therefore, the same parts as those in FIG.
- the multilayer laminated substrate 170 has the laminated inductor 140 shown in FIG. 11 [1]
- the multilayer laminated substrate 170 is formed by combining the same magnetic sheet 41 with an annular laminated transformer 40 having both ends of a primary winding 46 and a secondary winding 45 closed, and a magnetic sheet 13.
- One laminated inductor 140 composed of the windings 141 sandwiched between 1 is provided.
- a case where the multilayer laminated substrate 170 has the laminated inductor 150 shown in FIG. 11 [2] will be described.
- the multilayer laminated substrate 170 is formed by combining the same magnetic sheet 41, the annular laminated transformer 40 having both ends of the primary winding 46 and the secondary winding 45 closed, and the both ends of the winding 154.
- a laminated inductor 150 having an open shape is provided.
- the multilayer laminated substrate 170 has the laminated inductor 160 shown in FIG. 11 [3] will be described.
- the multilayer laminated substrate 170 is formed by combining the same magnetic sheet 41, the annular laminated transformer 40 having both ends of the primary winding 46 and the secondary winding 45 closed, and the both ends of the winding 164.
- a closed annular laminated inductor 160 is provided.
- the laminated transformer 40 In the laminated transformer 40, the magnetic flux is confined in the primary winding 46 and the secondary fist wire 45. Therefore, magnetic interference between the multilayer transformer 40 and the multilayer inductors 140, 150, and 160 is small.
- the laminated transformer 40 and the laminated inductors 140, 150, and 160 According to the multilayer laminated substrate 170 of the present embodiment, the laminated transformer 40 and the laminated inductors 140, 150, and 160 have the same magnetic sheet without providing a dielectric sheet or the like for obtaining magnetic insulation. Since it can be formed in 41, miniaturization can be realized.
- the multilayer inductors 140, 150, and 160 are provided in the ring of the multilayer transformer 40, even if the multilayer inductors 140, 150, and 160 are provided, the occupied area may increase. Absent. Therefore, further miniaturization can be realized.
- the laminated inductors 140, 150, and 160 may be provided in the laminating direction of the laminated transformer 40.
- the multilayer laminated substrate 170 may be provided in the lamination direction of the wiring sheet or in a part of the wiring sheet as in the first and second embodiments.
- the present invention is not limited to the first to fifth embodiments.
- the number of magnetic sheets, the number of turns of the primary winding and the number of turns of the secondary winding, and the ratio of the numbers of turns of the primary winding and the secondary winding may be any number.
- the primary winding and the secondary winding are not limited to a single winding and may be multiple windings. A plurality of secondary windings may be provided for one primary winding.
- the multilayer laminated substrate incorporating the laminated magnetic component of the present invention it is possible to realize further miniaturization of electronic devices by fully utilizing the advantages of the laminated inductor and the laminated transformer being light and small and thin. it can.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003266685A AU2003266685A1 (en) | 2003-09-29 | 2003-09-29 | Multilayer board incorporating laminated magnetic components |
PCT/JP2003/012433 WO2005031766A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品を内蔵した多層積層基板 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2003/012433 WO2005031766A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品を内蔵した多層積層基板 |
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WO2005031766A1 true WO2005031766A1 (ja) | 2005-04-07 |
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PCT/JP2003/012433 WO2005031766A1 (ja) | 2003-09-29 | 2003-09-29 | 積層型磁性部品を内蔵した多層積層基板 |
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AU (1) | AU2003266685A1 (ja) |
WO (1) | WO2005031766A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62152111A (ja) * | 1985-12-26 | 1987-07-07 | Matsushita Electric Ind Co Ltd | 高周波コイル |
JPS62176111A (ja) * | 1986-01-30 | 1987-08-01 | Matsushita Electric Ind Co Ltd | 高周波トランス |
JPH04239109A (ja) * | 1991-01-11 | 1992-08-27 | Murata Mfg Co Ltd | 積層型トランス |
JP2003197426A (ja) * | 2001-12-25 | 2003-07-11 | Tdk Corp | インダクタンス素子を含む複合電子部品 |
JP2003272920A (ja) * | 2002-03-09 | 2003-09-26 | Samsung Electro Mech Co Ltd | 印刷回路基板製造技術により製造した弱磁界感知用センサー及びその製造方法 |
-
2003
- 2003-09-29 WO PCT/JP2003/012433 patent/WO2005031766A1/ja not_active Application Discontinuation
- 2003-09-29 AU AU2003266685A patent/AU2003266685A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62152111A (ja) * | 1985-12-26 | 1987-07-07 | Matsushita Electric Ind Co Ltd | 高周波コイル |
JPS62176111A (ja) * | 1986-01-30 | 1987-08-01 | Matsushita Electric Ind Co Ltd | 高周波トランス |
JPH04239109A (ja) * | 1991-01-11 | 1992-08-27 | Murata Mfg Co Ltd | 積層型トランス |
JP2003197426A (ja) * | 2001-12-25 | 2003-07-11 | Tdk Corp | インダクタンス素子を含む複合電子部品 |
JP2003272920A (ja) * | 2002-03-09 | 2003-09-26 | Samsung Electro Mech Co Ltd | 印刷回路基板製造技術により製造した弱磁界感知用センサー及びその製造方法 |
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AU2003266685A1 (en) | 2005-04-14 |
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