WO2005043563A1

WO2005043563A1 - Lamination type magnetic part and method of producing the same, and method of producing hybrid sheet for lamination type magnetic part

Info

Publication number: WO2005043563A1
Application number: PCT/JP2003/014060
Authority: WO
Inventors: Toshimi Mizoguchi; Yasuhiro Yokote
Original assignee: Tamura Corporation
Priority date: 2003-11-04
Filing date: 2003-11-04
Publication date: 2005-05-12
Also published as: AU2003280714A1; JPWO2005043563A1

Abstract

A method comprises the steps of forming an inner magnetic sheet (13) on a PET sheet (B1), forming a dielectric sheet (14) on a PET sheet (B2), forming electric conduction patterns (17, 18) on the dielectric sheet (14), removing the portion other than the central portion and peripheral edge in the inner magnetic sheet (13) from the PET sheet (B1), removing the central portion and peripheral edge in the dielectric sheet (14) from the PET sheet (B2), and coinciding the portion remaining on the substrate of the PET sheet (B2) in the dielectric sheet (14) with the portion removed from the PET sheet (B1) in the inner magnetic sheet (13), thereby forming hybrid sheets (11, 12). The hybrid sheets (11, 12) have the PET sheets (B1, B2) removed therefrom, and are superposed and then calcined while being held at top and bottom between the pair of upper and lower magnetic sheets (15, 16).

Description

TECHNICAL FIELD The present invention relates to a laminated magnetic component, a method for producing the same, and a method for producing a hybrid sheet for a laminated magnetic component.

The present invention relates to a coil and a core that are formed by laminating sheets having electromagnetic characteristics.

TECHNICAL FIELD The present invention relates to a laminated magnetic component formed with the above, a method for producing the same, and a method for producing a hybrid sheet for a laminated magnetic component. Field background technology

In recent years, with the rapid progress of miniaturization of electronic equipment, laminated transformers, laminated inductors, laminated common mode filters, laminated composite components, laminated composite components, and laminated integrated components have become lighter, smaller, and thinner compared to wire-wound types. Circuits and the like are known. In the manufacturing process of such a laminated magnetic component, a method of obtaining a laminated body includes, for example, a screen printing method and a sheet method. It is manufactured by baking at a high temperature and integrating the laminated ceramic layers.

However, when a laminate of different types of ceramic layers is fired at a high temperature, a phenomenon occurs in which the magnetic component contained in the magnetic ceramic diffuses to the dielectric ceramic side. In addition, since the thermal expansion coefficients of the magnetic ceramic layer and the dielectric ceramic layer are significantly different, the difference in the thermal expansion and thermal shrinkage of each ceramic layer when the laminate is fired causes Thermal stress occurs.

Such diffusion and thermal stress of the magnetic component generated inside the laminate lowers the magnetic permeability of the magnetic ceramic layer, so that the inductance value of the laminated magnetic component obtained from the fired laminate is reduced. This may be a factor lower than the desired design value. In order to prevent such a phenomenon, for example, the following measures (1) to (5) have been conventionally taken.

(1) Inserting several (non-blank) magnetic ceramic layers without internal electrodes between the magnetic ceramic layer having the internal electrodes and the dielectric ceramic layer, Separates between the body ceramic layer and the dielectric ceramic layer i. .

(2) Increase the area (core area) inside the coiled internal electrode.

(3) In view of a decrease in the magnetic permeability in advance of firing, laminate sheets using a magnetic ceramic material having a high magnetic permeability.

(4) The number of turns of the coil-shaped internal electrode is increased by reducing the thickness of the magnetic ceramic layer per layer and decreasing the number of stacked magnetic ceramic layers.

Further, as an improved technique of the above (1) and (3), the following technique is disclosed in Japanese Patent No. 3363654.

(5) An intermediate magnetic ceramic layer having a higher magnetic permeability is inserted into the blank ceramic layer between the magnetic ceramic layer and the dielectric ceramic layer.

[task to solve]

By the way, the conventional techniques shown in the above (1) to (5) have the following problems. That is, in the methods (1) and (2), the electromagnetic coupling coefficient is clearly insufficient as compared with the wound magnetic parts, so that it is necessary to make the laminate thicker or longer and wider. This goes against the trend of miniaturization, which is an advantage of the above.

Also, in the method (3), the frequency-inductance characteristic changes because the magnetic permeability of the portion that becomes the coil core increases. In the method (4), since the facing distance between the coil-shaped internal electrodes is reduced due to the reduction in the thickness of the magnetic ceramic layer, and the floating capacitance of the inductor is increased, the frequency characteristics change. Would. Also, the method (5) is proposed to address the above problem, and the method (1), (2) is larger, and the inductance value is different from the method (3). Is suppressed. However, even with the method (5), it is necessary to insert the intermediate magnetic ceramic layer between the magnetic ceramic layer and the dielectric ceramic layer. .

Further, in Japanese Patent Application Laid-Open No. 7-210569, instead of simply stacking sheets made of different materials, high permeability and low permeability portions are coexistent in the same layer, and low permeability is provided. A laminated magnetic component is disclosed in which a sheet in which a conductive pattern for a coil is formed in a portion of the above is laminated in large numbers. In such a laminated magnetic component, the conductive pattern is embedded in the low magnetic permeability part and is surrounded by the high magnetic permeability part, so that the number of laminated sheets and the leakage magnetic flux are suppressed, and a high coupling coefficient is secured. it can. However, the manufacturing method involves the steps of creating a sheet on PET or the like, filling the cavity formed on the sheet with a material having a different magnetic permeability from that of the sheet, and then screen printing a conductive pattern. Production efficiency is low.

[Object of the invention]

The present invention has been proposed in order to solve the above-mentioned problems of the conventional technology. The purpose of the present invention is to provide a high-quality laminated magnetic component that is small in size and can ensure a high electromagnetic coupling coefficient. An object of the present invention is to provide a laminated magnetic component which can be efficiently produced, a method for producing the same, and a method for producing a composite sheet for a laminated magnetic component. Disclosure of the invention

The laminated magnetic component according to the present invention is composed of a first magnetic sheet having an air gap other than the magnetic core portion, a single magnetic sheet formed with a conductive pattern and matching the air gap of the magnetic sheet. A dielectric sheet constituting the sheet, and a pair of one or more sandwiching the upper and lower sides of one or a plurality of laminated composite sheets And a second magnetic sheet.

Further, the method for manufacturing a laminated magnetic component according to the present invention includes the steps of: forming a first magnetic sheet and a pair of second magnetic sheets; forming a dielectric sheet; and forming the dielectric sheet on the dielectric sheet. A conductive pattern is formed, a portion other than the core of the first magnetic sheet is removed, a portion corresponding to the core of the dielectric sheet is removed, and a portion of the dielectric sheet removed from the first magnetic sheet is removed. A composite sheet is formed by combining the removed portions, the composite sheet is laminated, and the upper and lower sides are sandwiched by the pair of second magnetic sheets and fired. Further, the method for producing a hybrid sheet for a laminated magnetic component according to the present invention includes the steps of: forming a first magnetic sheet; forming a dielectric sheet; forming a conductive pattern on the dielectric sheet; Removing portions other than the magnetic core portion of the magnetic material sheet of: and removing the portion corresponding to the magnetic core portion of the dielectric sheet, and matching the non-removed portion of the dielectric sheet with the portion removed from the first magnetic material sheet; It is characterized.

According to the present invention, a hybrid sheet can be formed only by matching a magnetic sheet prepared in advance and removing unnecessary portions with a dielectric sheet, so that a magnetic seed and a dielectric sheet can be formed. After creation, there is no need to take time and effort such as filling the cavity with materials and forming conductive patterns, and uniform and high-quality products can be manufactured efficiently. Desirably, a plurality of hybrid sheets are laminated, and the laminated hybrid sheets include a laminate in which a conductive pattern of a primary winding is formed and a laminate in which a conductive pattern of a secondary winding is formed. It may be a mold magnetic component. Thus, a laminated magnetic component including a primary winding and a secondary winding functioning as a transformer section can be efficiently manufactured by laminating the hybrid sheets.

Preferably, a first magnetic sheet is formed on the first substrate, a dielectric sheet is formed on the second substrate, a conductive pattern is formed on the dielectric sheet, and the first magnetic sheet is formed. The portion other than the magnetic core portion of the body sheet is removed from the first substrate, the portion corresponding to the magnetic core portion of the dielectric sheet is removed from the second substrate, and removed from the first substrate of the first magnetic sheet. To the dielectric A composite sheet is made by matching the portions remaining on the second substrate in the composite sheet, the first substrate and the second substrate are removed from the composite sheet, a composite sheet is laminated, The laminated magnetic component may be manufactured by sandwiching and firing between a pair of second magnetic sheets.

In this way, by creating a first magnetic sheet on the first substrate and a dielectric sheet on the second substrate in advance, it is possible to remove unnecessary portions and match remaining portions. , It can be done efficiently. '

Desirably, the first magnetic sheet and the dielectric sheet are cut such that the boundary between the removed portion and the non-removed portion is an inclined end surface. As a result, the end faces of the first magnetic material sheet and the dielectric sheet can be brought into close contact or overlap with each other, so that a composite sheet in which the magnetic material portion and the dielectric portion are joined without any gap can be created. Uniform and high quality products can be manufactured. Desirably, the end faces are joined by pressing the first magnetic sheet and the dielectric sheet. As a result, a composite sheet in which the magnetic material and the dielectric material are reliably integrated can be created, and uniform and high-quality products can be manufactured. Brief Description of Drawings

FIG. 1 is an exploded perspective view showing a laminated body of a laminated transformer according to one embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the laminated transformer according to one embodiment of the present invention.

FIG. 3 is a flowchart showing a method of manufacturing a laminated transformer according to an embodiment of the present invention. FIG. 4 shows an internal magnetic sheet and a dielectric sheet in which a boundary between a central portion and a peripheral portion is cut. A perspective view, FIG. 5 is an explanatory view showing a cutting operation, FIG. 6 is a perspective view showing an internal magnetic sheet and a dielectric sheet from which unnecessary parts have been removed, and FIG. FIG. 2 is a perspective view showing a composite sheet.

FIG. 8 is an explanatory view showing a joining step of the internal magnetic sheet and the dielectric sheet, and FIG. 9 is an enlarged sectional view of the joining surface.

Further, FIG. 10 shows various laminated magnetic components having different winding arrangements, widths, and the like. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing the best mode for carrying out the invention.

Next, as a best mode for carrying out the present invention (hereinafter, referred to as an embodiment), a laminated transformer and a method for manufacturing the same will be specifically described.

[1. Configuration of multilayer transformer]

First, the laminated transformer of the present embodiment will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing an example of a laminated body constituting the laminated transformer. FIG. 2 is a longitudinal sectional view showing an example of the laminated transformer manufactured according to the present embodiment.

That is, the laminated body 10 is obtained by laminating a plurality of hybrid sheets 11 and 12, and sandwiching them by the upper magnetic sheet 15 and the lower magnetic sheet 16. The composite sheets 11 and 12 are provided at the center and at the periphery of the non-magnetic dielectric portions 11a and 12a, respectively, at the center magnetic portion 11b and 12b and at the peripheral magnetic portion 11 1a. c, 1 2 c are the physically configured sheets. As will be described later, the hybrid sheets 11 and 12 have internal parts that leave portions corresponding to the central magnetic part 11b and 12b and the peripheral magnetic part 11c and .12c. It is manufactured by matching a magnetic sheet 13 with a dielectric sheet 14 from which portions corresponding to these magnetic parts have been removed (see FIGS. 4 to 7).

The inner magnetic material sheet 13 in the present embodiment corresponds to the first magnetic material sheet described in the claims, and includes a central magnetic material part lib, 12b and a peripheral magnetic material part 11c, 12. c constitutes the magnetic body part described in the claims. Further, the upper magnetic sheet 15 and the lower magnetic sheet 16 in the present embodiment correspond to the second magnetic sheet described in the claims.

On one surface of the dielectric portions 11a and 12a, conductive patterns 17 and 18 constituting windings of the transformer are provided. Each of the conductive patterns 17 and 18 forms one of a primary winding and a secondary winding. In FIG. 1, a pair of hybrid sheets corresponding to the primary winding and the secondary winding are shown. Although only the sheets 11 and 12 are described, a plurality of hybrid sheets 11 and 12 can be laminated in order to obtain a desired number of windings. The respective windings are connected via through holes 19 and 20 filled with a conductor.

Further, as shown in FIG. 2, on the lower surface of the lower magnetic sheet 16, external electrodes 21 connected to conductive patterns 17 and 18 constituting either the primary winding or the secondary winding are provided. , 22 are provided. A pair of external electrodes 21 1 and 22 are prepared for both ends on both the primary side and the secondary side, but connect the conductive patterns 17 and 18 to the external electrodes 21 and 22 The illustration of through holes, conductors, and the like is omitted. In the laminated transformer 100 formed in this way, the central magnetic part lib, 12b, the peripheral magnetic parts 11c, 12c, the upper magnetic sheet 15 and the lower magnetic sheet 16 It forms the core of the force transformer.

Note that FIG. 1 and FIG. 2 are schematic diagrams partially simplified for convenience of explanation, and therefore do not correspond exactly. For example, the laminated transformer of FIG. 2 is obtained by laminating more of the hybrid sheets 11 and 12 of FIG. Also, in the laminated transformer of FIG. 2, the number of turns of the conductive patterns 17 and 18 serving as the primary winding and the secondary winding is increased, so that the conductive patterns 17 and 18 shown in FIG. Have different shapes.

[2. Operation of multilayer transformer]

Such a laminated transformer 100 has, for example, an external electrode 21 (one end) on the primary side—a through hole 19 (one end) → a conductive pattern 17 → a through hole 19 (the other end) → The current flows in the order of the external electrodes 21 (the other end) or in the reverse order. On the other hand, on the secondary side of the multilayer transformer 100, the external electrode 22 (—end) → through hole 20 (—end) → conductive pattern 18 → through hole 20 (other end) → external Current flows in the order of electrode 22 (the other end) or in the reverse order.

Then, for example, the magnetic flux generated by the current flowing through the conductive pattern 17 constituting the primary winding forms an electromotive force according to the turns ratio to form the secondary winding. Generated in the conductive pattern 18. Thus, the multilayer transformer 100 operates.

[3. Manufacturing method of multilayer transformer]

Next, a method for manufacturing the laminated transformer according to the present embodiment will be described with reference to FIGS. FIG. 3 is a process diagram, and FIGS. 4 to 9 are diagrams showing various sheet materials during the process.

[3-1. Creation of magnetic sheet]

First, a magnetic slurry for the internal magnetic sheet 13 is prepared (Step 301). The magnetic material may be, for example, a Ni-Cu-Zn system, but is not limited thereto. Then, as shown in FIG. 4, for example, by using a doctor blade method, an extrusion molding method, or the like, the magnetic slurry is placed on a PET (polyethylene terephthalate) film B1 serving as a substrate, and the inside thereof is placed inside. The magnetic sheet 13 is formed (step 302). Similarly, an upper magnetic sheet 15 and a lower magnetic sheet 1 & are formed on a PET film (steps 303, 304).

The inner magnetic sheet 13, the upper and lower magnetic sheets 15, 16, and the dielectric sheet 14 described later are each one sheet having a size corresponding to a large number of components. The processing described below for the sheet is also performed at the position corresponding to each component.

[3 _ 2. Creation of dielectric sheet]

On the other hand, a nonmagnetic slurry for the dielectric sheet 14 is also prepared (Step 305). The nonmagnetic material of the dielectric sheet 1 for 4, for example, glass can be used ceramic materials was based on A 1 ₂ 0 _3. Here, the “non-magnetic material” means a substance having a magnetic permeability smaller than that of the magnetic material sheet. “Dielectric sheet” means a sheet having at least a higher resistivity than a magnetic sheet, and is also called an insulating sheet. As shown in FIG. 4, such a nonmagnetic slurry is placed on a PET film B2 by using, for example, a doctor blade method, an extrusion molding method, etc., thereby forming a dielectric sheet 14. (Step 306).

Then, through holes 19 and 20 are formed by a press or the like (step 307). For example, a primary paste such as an Ag-based conductive paste is printed on the dielectric sheet 14 by screen printing. Conductive patterns 17 and 18 to be wires and secondary windings are formed (step 308). The portions forming the conductive patterns 17 and 18 are portions that become the dielectric portions 11a and 12a as described above. Also, the conductive paste is filled in the through holes 19 and 20.

[3— 3. Cutting both sheets]

As described above, for the inner magnetic sheet 13 formed on the PET film B1, as shown in FIG. 4, the line XI, which is the outer edge of the central magnetic portion lib, 12b, and the outer edge The line Y1, which is the inner edge of the magnetic portions 11c and 12c, is half-cut by a cutting device (step 309). As shown in FIG. 5, the half-cut here is such that only the inner magnetic sheet 13 is cut by the cutter C and the PET film B 1 is not cut. The end face 3 is cut so as to have an inclination angle.

Similarly, the dielectric sheet 14 is also half-cut so that the line X2, which is the inner edge of the dielectric portions 11a, 12a, and the line Y2, which is the outer edge, are inclined at the end face by the cutting device. (Step 310). FIGS. 8 (A) and 8 (B) schematically show such cut surfaces. It is desirable that the inclination of the cut surface of the inner magnetic sheet 13 and the inclination of the cut surface of the dielectric sheet 14 be the same angle when they are matched. At least, the effects described later can be sufficiently obtained if each has an inclined surface. Next, as shown in FIG. 6, unnecessary portions of the internal magnetic sheet 13 are removed (step 311). The unnecessary portion is a portion other than the central magnetic body portion lib, 12b and the peripheral magnetic body portion 11c, 12c. On the other hand, unnecessary portions of the dielectric sheet 14 are also removed. The unnecessary portion is a portion other than the dielectric portions 11a and 12a. FIG. 8 (C) schematically shows the cross section from which the unnecessary portion has been removed. Here, the removal of the unnecessary portion can be performed by masking the non-removed portion and peeling off the tape adhered thereon, but is not limited to this method. Further, the portions of the dielectric sheet 14 corresponding to the central magnetic portions lib, 12b and the peripheral magnetic portions 11c, 12c may be removed at the same time, or may be removed sequentially. You may.

[3— 4. Creating a hybrid sheet]

Further, as described above, the dielectric sheet 14 from which the unnecessary portion has been removed is inverted with respect to the internal magnetic material sheet 13 from which the unnecessary portion has been removed (step 3 13), and the internal magnetic material sheet 13 is removed. Match the dielectric sheet 14 to the part. It should be noted that the magnetic material sheet 14 side may be reversed so as to match.

Thus, when the two sheets are aligned, the inclined end faces come into contact as shown in FIG. 8 (D). Then, as shown in FIG. 8 (E) and FIG. 9, the end faces are joined by a press or the like to integrate the dielectric sheet 14 and the internal magnetic sheet 13 (step 314). For example, as shown in FIG. 9, when the width a of the joining section is about 5 0 mu, by adding 3 0 kg Z c Πΐ ² about pressure, working adhesion of the magnetic material and dielectric material Thus, it is possible to make them one by one.

Then, as shown in FIG. 7, one of the PET films (for example, the film B 2 on the dielectric sheet 14 side) is removed from the composite sheets 11 and 12 thus formed (see FIG. 7). Step 3 15).

[3— 5. Stacking transformer creation]

The hybrid sheet 11 or 12 formed as described above is laminated on the lower magnetic sheet 16 and the PET film B1 is removed. Similarly, the composite sheets 11 or 12 are laminated so that the required number is obtained, and the upper magnetic sheet 15 is further placed, pressed and brought into close contact with each other to form a laminated body 10 (process). 3 1 6). In addition, the PET films of the upper magnetic material sheet 15 and the lower magnetic material sheet 16 are appropriately removed in any of the manufacturing processes, for example, after forming the laminate. Subsequently, the laminated body 10 is cut into a predetermined size corresponding to an individual laminated transformer (step 3117).

0 For example, it is cut into a 6 mm X 9 aim rectangular shape. Then, for example, simultaneous firing is performed at about 900 ° C. (step 318). Finally, by forming the external electrodes 21 and 22, the laminated transformer 100 is completed (Step 3 19).

[4. Effects of the embodiment] ''

According to the present embodiment, the composite sheets 11 and 12 are formed by appropriately cutting and matching the internal magnetic material sheet 13 prepared in advance and the dielectric sheet 14 to each other. When integrating the portion with the dielectric portion, no labor or time is required for filling the cavity with a material and subsequently forming a conductive pattern. The internal magnetic sheet 13 and the dielectric sheet 14 that are prepared in advance need only be formed as a single sheet, so that the production is easy. Therefore, very efficient product manufacturing becomes possible.

In addition, since the already created internal magnetic sheet 13 and dielectric sheet 14 are combined, compared to filling the material into the cavity, no drying time is required, and unevenness that is likely to occur during filling is eliminated. Does not occur. Therefore, uniform and high quality products can be manufactured. In particular, when the joining cross sections of the inner magnetic sheet 13 and the dielectric sheet 14 are both perpendicular, it is difficult for the two to adhere to each other. In the present embodiment, as shown in FIGS. 8 (D), (E), and FIG. And inclined to match each other. If there is such an inclination, the end faces are joined by pressing from above and below, and the two are completely adhered to each other.

The inner magnetic sheet 13 and the dielectric sheet 14 are formed on PET ^ B 1 and B2, and the subsequent cutting, removal of unnecessary portions, and matching of the remaining portions are performed on the PET sheet B1. , B2, each process can be performed efficiently. In particular, even when the sheet is divided into a plurality of portions, such as the central magnetic portions 11b and 12b and the peripheral magnetic portions 11c and 12c of the above embodiment, PET ^ -Bl, B Since they can be handled together on the 2, high-speed processing is possible.

In addition, the space between the primary winding and the secondary winding is filled with a non-magnetic dielectric part. As a result, a high magnetic shield structure is achieved and leakage magnetic flux can be suppressed. In addition, since there is no need to apply a dielectric paste on the primary winding and the secondary winding to form a dielectric layer, the insulation between the primary windings and the secondary winding is degraded. There is no space between the primary and secondary windings. Therefore, the electromagnetic coupling coefficient can be increased while maintaining the insulation between the windings. In addition, the insulation between the primary winding and the secondary winding is enhanced by the presence of the dielectric portion.

In addition, since a gap (a gap having a low magnetic permeability) for improving the magnetic saturation characteristics of the core can be easily realized, excellent constant inductance can be obtained. Furthermore, withstand voltage can be secured by the electric insulation of the dielectric portion, so that high withstand voltage and stability can be achieved.

In addition, a configuration in which a single composite sheet 11, 1 2 in which the central magnetic body 11 b and the peripheral magnetic body 12 b are integrated with the dielectrics 11 a, 12 a is laminated. Therefore, a thin transformer can be easily realized. Therefore, it can be widely used as a surface mount part (SMD: Surface Moount Deevice).

Also, by changing the specifications such as the material and size of each hybrid sheet 11 and 12 and reducing the number of laminations of the hybrid sheets 11 and 12, the number of windings and the number of windings of the laminated transformer as a finished product Since the ratio, magnetic permeability, size, dielectric strength, and the like can be adjusted, the degree of freedom in design is high, and multilayer transformers with various characteristics can be easily and mass-produced.

[5. Other embodiments]

The present invention is not limited to the above embodiments. For example, a dielectric sheet having no conductive pattern may be included in some layers by using a dielectric sheet having no conductive pattern. For example, the insulating performance can be enhanced by including a dielectric portion having no conductive pattern in a layer adjacent to the second magnetic material sheet (upper or lower magnetic material sheet). Some layers may include non-hybrid dielectric or magnetic sheets.

2 Also, for example, the above embodiment is an example in which the present invention is applied to a multilayer transformer, but similarly, a multilayer magnetic component that requires a winding structure with a conductive pattern, for example, a multilayer inductor, a multilayer common mode filter, It can also be applied to components, laminated hybrid integrated circuits, etc. Regardless of the application to any of the electronic components, the range of use as a thin surface-mount type component is widened as in the multilayer transformer. In particular, when applied to a common mode filter, common mode noise can be effectively removed by high electromagnetic coupling. In addition, the magnetic material, the dielectric material, the conductive material, and the like constituting each sheet, conductive pattern, electrode, and the like can be appropriately changed according to the type of such electronic components and the specifications required for each. Any material available now or in the future can be applied. Therefore, the present invention is not limited to the use of the materials exemplified in the above embodiments. The size and shape of each part are not limited to the numerical values exemplified in the above embodiment. The method for forming each sheet, conductive pattern, and the like is not limited to the method exemplified in the above embodiment.

In addition, the number of laminated hybrid sheets, the number, shape, arrangement, and the like of the conductive patterns in the composite sheet are also free. In other words, taking advantage of the high degree of freedom of design as described above, as shown in FIGS. 10 (A) to (L), the number and width of the primary winding and the secondary winding, and the primary winding Regarding the relative positional relationship between the secondary winding and the secondary winding, various types of laminated magnetic components can be manufactured. The shapes of the primary winding and the secondary winding are also free, such as spiral and L-shaped. The number of layers of the second magnetic material sheet (upper and lower magnetic material sheets) is also free, and the shape of the magnetic material portion serving as the magnetic core (core) is also free. Industrial applicability

ADVANTAGE OF THE INVENTION According to the laminated magnetic component of the present invention, the method of manufacturing the same, and the method of producing a composite sheet for a laminated magnetic component, a high-quality laminated magnetic component capable of ensuring a high electromagnetic coupling coefficient while being small in size can be efficiently manufactured. It can be manufactured well.

Claims

The scope of the claims

1. a first magnetic sheet having a void other than the magnetic core;

A conductive sheet is formed, and a single composite sheet is formed by matching the gap of the magnetic sheet—a dielectric sheet;

A pair of second magnetic sheets sandwiching the upper and lower sides of a plurality of the composite sheets which are laminated one by one;

A laminated magnetic component comprising:

2. A plurality of the hybrid sheets are laminated,

2. The laminated hybrid sheet according to claim 1, wherein the laminated sheet includes a sheet on which a conductive pattern of a primary winding is formed and a sheet on which a conductive pattern of a secondary winding is formed. Laminated magnetic parts.

3. Create a first magnetic sheet and a pair of second magnetic sheets, create a dielectric sheet,

Create a conductive pattern on the dielectric sheet,

Removing portions other than the magnetic core portion of the first magnetic sheet,

Removing a portion corresponding to the magnetic core portion in the dielectric sheet,

A non-removed portion of the dielectric sheet is matched with a portion removed from the first magnetic material sheet to form a composite sheet,

Laminating the hybrid sheet, sandwiching the upper and lower portions between the pair of second magnetic sheets, and firing.

A method for manufacturing a laminated magnetic component.

4. Create a first magnetic sheet on the first substrate,

Create a dielectric sheet on the second substrate,

Create a conductive pattern on the dielectric sheet,

Except for the core portion of the first magnetic material sheet,

Four And remove

Removing a portion corresponding to a magnetic core in the dielectric sheet from the second substrate;

A composite sheet is formed by combining a portion of the dielectric sheet removed from the first substrate with a portion of the dielectric sheet remaining on the second substrate,

Removing the first substrate and the second substrate from the composite sheet, laminating the composite sheet, and sintering the upper and lower portions thereof with a pair of second magnetic sheets;

A method for manufacturing a laminated magnetic component.

5. The laminated magnetic material according to claim 3 or 4, wherein the first magnetic sheet and the dielectric sheet are cut so that a boundary between a removed portion and a non-removed portion of the first magnetic sheet and the dielectric sheet is an inclined end face. The method of manufacturing the part.

6. The laminated magnetic component according to any one of claims 3 to 5, wherein an end face is joined by pressing the first magnetic material sheet and the dielectric sheet. Manufacturing method.

7. Create the first magnetic sheet,

Create a dielectric sheet,

Create a conductive pattern on the dielectric sheet,

Matching the non-removed portion of the dielectric sheet with the portion removed from the first magnetic sheet;

A method for producing a hybrid sheet for a laminated magnetic component, the method comprising:

8. Create a first magnetic sheet on the first substrate, Create a dielectric sheet on the second substrate,

Create a conductive pattern on the dielectric sheet,

Removing the portion other than the magnetic core portion of the first magnetic material sheet from the first substrate,

Matching a portion of the dielectric sheet remaining on the second substrate with a portion of the first magnetic sheet removed from above the first substrate;

A method for producing a composite sheet for a laminated magnetic component.

9. The laminated magnetic sheet according to claim 7, wherein the first magnetic sheet and the dielectric sheet are cut so that a boundary between a removed portion and a non-removed portion of the dielectric sheet is an inclined end surface. Manufacturing method of hybrid sheet for parts.

10. The laminated magnetic component according to any one of claims 7 to 9, wherein an end face is joined by pressing the first magnetic sheet and the dielectric sheet. Manufacturing method of hybrid sheet.