CN220252959U - Coil component - Google Patents
Coil component Download PDFInfo
- Publication number
- CN220252959U CN220252959U CN202290000247.1U CN202290000247U CN220252959U CN 220252959 U CN220252959 U CN 220252959U CN 202290000247 U CN202290000247 U CN 202290000247U CN 220252959 U CN220252959 U CN 220252959U
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- Prior art keywords
- coil
- line width
- conductor
- coil conductor
- width direction
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- 239000004020 conductor Substances 0.000 claims abstract description 390
- 229920005989 resin Polymers 0.000 claims description 115
- 239000011347 resin Substances 0.000 claims description 115
- 239000010410 layer Substances 0.000 description 126
- 239000002184 metal Substances 0.000 description 28
- 229910052751 metal Inorganic materials 0.000 description 28
- 238000004519 manufacturing process Methods 0.000 description 21
- 230000002093 peripheral effect Effects 0.000 description 21
- 239000011229 interlayer Substances 0.000 description 20
- 239000011888 foil Substances 0.000 description 15
- 238000007747 plating Methods 0.000 description 15
- 239000011241 protective layer Substances 0.000 description 15
- 238000012986 modification Methods 0.000 description 14
- 230000004048 modification Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 229920005992 thermoplastic resin Polymers 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 101100443272 Arabidopsis thaliana DIR2 gene Proteins 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 102100038804 FK506-binding protein-like Human genes 0.000 description 2
- 101001031402 Homo sapiens FK506-binding protein-like Proteins 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
A coil component is provided in which a first coil conductor is located at a position closest to a first direction among a plurality of coil conductors. The width of the first top portion in the line width direction is smaller than the width of the first bottom portion in the line width direction, and the width of the second top portion in the line width direction is smaller than the width of the second bottom portion in the line width direction. The shortest distance between the first top and the first bottom is longer than the shortest distance between the second top and the second bottom. The first ratio obtained by dividing the width of the first top portion in the line width direction by the width of the first bottom portion in the line width direction is smaller than the second ratio obtained by dividing the width of the second top portion in the line width direction by the width of the second bottom portion in the line width direction.
Description
Technical Field
The present utility model relates to a coil component including a coil.
Background
As an utility model related to a conventional coil component, for example, a multilayer substrate described in patent document 1 is known. The multilayer substrate includes a laminate and a coil. The laminate has a structure in which a plurality of base material layers are laminated. The material of the plurality of substrate layers is a thermoplastic resin. The coil is disposed within the laminate. The coil has a structure in which a plurality of coil conductor patterns laminated together with a plurality of base material layers are connected by interlayer connection conductors. Such a multilayer substrate is produced by integrating a plurality of base material layers made of thermoplastic resin by thermocompression bonding.
Prior art literature
Patent literature
Patent document 1: japanese patent application 2020-72163
Disclosure of Invention
Problems to be solved by the utility model
However, the multilayer substrate described in patent document 1 has the following expectations: the positions of the plurality of coil conductor patterns are suppressed from deviating from the design value, and the direct current resistance value of the coil is intended to be reduced.
Accordingly, an object of the present utility model is to provide a coil component and a method for manufacturing the coil component, which can suppress deviation of positions of a plurality of coil conductors from a design value and can reduce a dc resistance value of a coil.
Means for solving the problems
In the coil component of one embodiment of the present utility model,
one of the up-down directions is a first direction, the other of the up-down directions is a second direction,
the coil component is provided with:
a laminate having a structure in which a plurality of resin layers are laminated in the up-down direction; and
a coil including a plurality of coil conductors having a line shape when viewed in an up-down direction and having a spiral shape surrounding a circumference of a central axis extending in the up-down direction, the plurality of coil conductors including a first coil conductor, a second coil conductor, and a third coil conductor arranged in this order in the second direction,
The first coil conductor is located at a position closest to the first direction among the plurality of coil conductors,
a direction orthogonal to a direction in which the first coil conductor, the second coil conductor, and the third coil conductor extend when viewed in the up-down direction is a line width direction,
the outer edge of the first coil conductor has a first bottom part being a plane most in the second direction in the outer edge of the first coil conductor and a first top part being a plane most in the first direction in the outer edge of the first coil conductor,
the width of the first top portion in the line width direction is smaller than the width of the first bottom portion in the line width direction,
the outer edge of the second coil conductor has a second bottom part which is a plane located most in the second direction in the outer edge of the second coil conductor and a second top part which is a plane located most in the first direction in the outer edge of the second coil conductor,
the width of the second top portion in the line width direction is smaller than the width of the second bottom portion in the line width direction,
the shortest distance between the first top and the first bottom is longer than the shortest distance between the second top and the second bottom,
A first ratio obtained by dividing the width of the first top portion in the line width direction by the width of the first bottom portion in the line width direction is smaller than a second ratio obtained by dividing the width of the second top portion in the line width direction by the width of the second bottom portion in the line width direction.
In the method for manufacturing a coil component according to one embodiment of the present utility model,
one of the up-down directions is a first direction, the other of the up-down directions is a second direction,
the coil component is provided with:
a laminate having a structure in which a plurality of resin layers are laminated in the up-down direction; and
a coil including a plurality of coil conductors having a line shape when viewed in an up-down direction and having a spiral shape surrounding a circumference of a central axis extending in the up-down direction, the plurality of coil conductors including a first coil conductor, a second coil conductor, and a third coil conductor arranged in this order in the second direction,
the method for manufacturing the coil component comprises the following steps:
a second coil conductor forming step of forming the second coil conductor on the resin layer;
a thermocompression bonding step of thermocompression bonding the plurality of resin layers after the second coil conductor forming step;
A first coil conductor forming step of increasing a thickness in a vertical direction of the first coil conductor after the thermocompression bonding step, the first coil conductor being located in the resin layer closest to the first direction among the plurality of resin layers thermocompression bonded in the thermocompression bonding step; and
a third coil conductor forming step of increasing a thickness in a vertical direction of the third coil conductor after the thermocompression bonding step, the third coil conductor being located in the resin layer closest to the second direction among the plurality of resin layers thermocompression bonded in the thermocompression bonding step,
a direction orthogonal to a direction in which the first coil conductor, the second coil conductor, and the third coil conductor extend when viewed in the up-down direction is a line width direction,
the outer edge of the first coil conductor has a first bottom part being a plane most in the second direction in the outer edge of the first coil conductor and a first top part being a plane most in the first direction in the outer edge of the first coil conductor,
the width of the first top portion in the line width direction is smaller than the width of the first bottom portion in the line width direction,
The outer edge of the second coil conductor has a second bottom part which is a plane located most in the second direction in the outer edge of the second coil conductor and a second top part which is a plane located most in the first direction in the outer edge of the second coil conductor,
the width of the second top portion in the line width direction is smaller than the width of the second bottom portion in the line width direction,
the shortest distance between the first top and the first bottom is longer than the shortest distance between the second top and the second bottom,
a first ratio obtained by dividing the width of the first top portion in the line width direction by the width of the first bottom portion in the line width direction is smaller than a second ratio obtained by dividing the width of the second top portion in the line width direction by the width of the second bottom portion in the line width direction.
In the method for manufacturing a coil component according to one embodiment of the present utility model,
one of the up-down directions is a first direction, the other of the up-down directions is a second direction,
the coil component is provided with:
a laminate having a structure in which a plurality of resin layers are laminated in the up-down direction; and
a coil including a plurality of coil conductors having a line shape when viewed in an up-down direction and having a spiral shape surrounding a circumference of a central axis extending in the up-down direction, the plurality of coil conductors including a first coil conductor, a second coil conductor, and a third coil conductor arranged in this order in the second direction,
The method for manufacturing the coil component comprises the following steps:
a second coil conductor forming step of forming the second coil conductor on the resin layer;
a third coil conductor forming step of forming the third coil conductor on the resin layer;
a thermocompression bonding step of thermocompression bonding the plurality of resin layers after the second coil conductor forming step and the third coil conductor forming step so that the second coil conductor and the third coil conductor are sequentially arranged in the second direction; and
a first coil conductor forming step of increasing a thickness in a vertical direction of the first coil conductor after the thermocompression bonding step, the first coil conductor being located in the resin layer closest to the first direction among the plurality of resin layers thermocompression bonded in the thermocompression bonding step,
a direction orthogonal to a direction in which the first coil conductor, the second coil conductor, and the third coil conductor extend when viewed in the up-down direction is a line width direction,
the outer edge of the first coil conductor has a first bottom part being a plane most in the second direction in the outer edge of the first coil conductor and a first top part being a plane most in the first direction in the outer edge of the first coil conductor,
The width of the first top portion in the line width direction is smaller than the width of the first bottom portion in the line width direction,
the outer edge of the second coil conductor has a second bottom part which is a plane located most in the second direction in the outer edge of the second coil conductor and a second top part which is a plane located most in the first direction in the outer edge of the second coil conductor,
the width of the second top portion in the line width direction is smaller than the width of the second bottom portion in the line width direction,
the shortest distance between the first top and the first bottom is longer than the shortest distance between the second top and the second bottom,
a first ratio obtained by dividing the width of the first top portion in the line width direction by the width of the first bottom portion in the line width direction is smaller than a second ratio obtained by dividing the width of the second top portion in the line width direction by the width of the second bottom portion in the line width direction.
Effects of the utility model
According to the coil component of the present utility model, the dc resistance value of the coil can be reduced while suppressing deviation of the plurality of coil conductors from the design value.
Drawings
Fig. 1 is a cross-sectional view of a drive module 10 including a coil member 11.
Fig. 2 is an exploded perspective view of the coil component 11.
Fig. 3 is a cross-sectional view showing a manufacturing process of the coil component 11.
Fig. 4 is a cross-sectional view showing a manufacturing process of the coil component 11.
Fig. 5 is a cross-sectional view showing a manufacturing process of the coil component 11.
Fig. 6 is a sectional view of the coil part 11 a.
Fig. 7 is an exploded perspective view of the coil component 11 a.
Fig. 8 is a sectional view of the coil part 11 b.
Fig. 9 is an exploded perspective view of the coil component 11 b.
Fig. 10 is a sectional view of the coil part 11 c.
Fig. 11 is a sectional view of the coil part 11 d.
Fig. 12 is a cross-sectional view showing a manufacturing process of the coil component 11 d.
Fig. 13 is a cross-sectional view showing a manufacturing process of the coil component 11 d.
Fig. 14 is a cross-sectional view showing a manufacturing process of the coil component 11 d.
Fig. 15 is a sectional view of the coil part 11 e.
Fig. 16 is a sectional view of the coil component 11 f.
Fig. 17 is a cross-sectional view showing a manufacturing process of the coil component 11 f.
Fig. 18 is a cross-sectional view showing a manufacturing process of the coil component 11 f.
Fig. 19 is a cross-sectional view showing a manufacturing process of the coil component 11 f.
Fig. 20 is a sectional view of the coil component 11 g.
Description of the reference numerals
10: a driving module;
11. 11a to 11i: a coil member;
12: a laminate;
15a to 15f: a resin layer;
16a, 16b: a protective layer;
18a to 18f: a coil conductor;
20a, 20b: a lead conductor;
50: a magnet;
181a, 181f: a base conductor;
182a, 182f: a plating layer;
ax1: a central axis;
l: a coil;
l1: a coil;
l2: a coil;
s1: a first bottom;
s2: a first top;
s3: a second bottom;
s4: a second top;
s5: a third bottom;
s6: a third top portion;
v1 to v6: and an interlayer connection conductor.
Detailed Description
(embodiment)
[ Structure of drive Module ]
Hereinafter, a structure of the driving module 10 according to an embodiment of the present utility model will be described with reference to the drawings. Fig. 1 is a cross-sectional view of a drive module 10 including a coil member 11. Fig. 2 is an exploded perspective view of the coil component 11.
In this specification, the direction is defined as follows. The lamination direction of the lamination body 12 of the coil component 11 is defined as the up-down direction. The upward direction, which is one of the up-down directions, is the first direction DIR1. The other downward direction is the second direction DIR2. The left-right direction and the front-rear direction are orthogonal to the up-down direction. The left-right direction is orthogonal to the front-rear direction. The up-down direction, the front-back direction, and the left-right direction in the present embodiment may be different from the up-down direction, the front-back direction, and the left-right direction in use of the drive module 10.
Hereinafter, X is a component or member of the drive module 10. In the present specification, unless otherwise specified, each part of X is defined as follows. The front of X refers to the front half of X. The rear of X refers to the rear half of X. The left part of X refers to the left half of X. The right part of X refers to the right half of X. The upper part of X refers to the upper half of X. The lower part of X refers to the lower half of X. The front end of X means the front-direction end of X. The rear end of X refers to the end in the rear direction of X. The left end of X refers to the end in the left direction of X. The right end of X refers to the right-hand end of X. The upper end of X refers to the end in the upward direction of X. The lower end of X refers to the end in the lower direction of X. The front end of X means the front end of X and its vicinity. The rear end of X means the rear end of X and its vicinity. The left end of X means the left end of X and its vicinity. The right end of X means the right end of X and its vicinity. The upper end of X means the upper end of X and its vicinity. The lower end of X means the lower end of X and its vicinity.
First, the structure of the drive module 10 and the coil component 11 will be described with reference to fig. 1. The driving module 10 is used for a wireless communication terminal such as a smart phone.
As shown in fig. 1 and 2, the drive module 10 includes a coil member 11 and a magnet 50. The coil component 11 includes a laminate 12, a coil L, and lead conductors 20a and 20b. The laminated body 12 has a structure in which resin layers 15a to 15f are laminated in the up-down direction. In the present embodiment, the laminate 12 includes resin layers 15a to 15f and protective layers 16a and 16b. The protective layer 16a, the resin layers 15a to 15f, and the protective layer 16b are arranged in this order from the top.
As shown in fig. 2, the resin layers 15a to 15f have upper and lower main surfaces arranged in the vertical direction, respectively. The material of the resin layers 15a to 15f is a thermoplastic resin. Examples of the thermoplastic resin include thermoplastic resins such as liquid crystal polymers and PTFE (polytetrafluoroethylene). The material of the resin layers 15a to 15f may be polyimide. Thus, the material of the laminated body 12 is a nonmagnetic material.
The protective layers 16a, 16b are resist layers. The protective layer 16a is located on the upper main surface of the resin layer 15 a. The protective layer 16a protects the coil conductor 18a located on the upper main surface of the resin layer 15 a. The protective layer 16b is located on the lower main surface of the resin layer 15 f. The protective layer 16b protects the coil conductor 18f located on the lower main surface of the resin layer 15 f. The protective layers 16a and 16b may be formed by adhering an insulating sheet to the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15f, respectively, or may be formed by printing an insulating resin paste on the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15 b.
The coil L is provided in the laminated body 12. As shown in fig. 1 and 2, the coil L has a spiral shape around a central axis Ax1 extending in the up-down direction. In the present embodiment, the coil L has a spiral shape that travels in an upward direction while encircling clockwise. The coil L includes a plurality of coil conductors having a line shape when viewed in the up-down direction. The plurality of coil conductors include a coil conductor 18a (first coil conductor), coil conductors 18b to 18e (second coil conductor), and a coil conductor 18f (third coil conductor) arranged in this order in the downward direction (second direction DIR 2). In the present embodiment, as shown in fig. 2, the coil L includes coil conductors 18a to 18f and interlayer connection conductors v1 to v6.
The coil conductors 18a to 18f are stacked in the up-down direction together with the resin layers 15a to 15 f. More specifically, the coil conductors 18a to 18e are located on the upper main surfaces of the resin layers 15a to 15e, respectively. The coil conductor 18f is located on the lower main surface of the resin layer 15 f. Thus, the coil conductors 18a to 18f are arranged in order from the top. In addition, the coil conductor 18a (first coil conductor) is located at the most upper position (first direction DIR 1) of the coil conductors 18a to 18 f. The coil conductor 18f (third coil conductor) is located at the lowest position (second direction DIR 2) of the coil conductors 18a to 18 f.
The coil conductors 18a to 18f (first coil conductor, second coil conductor, and third coil conductor) each have a spiral shape surrounding one or more turns around the central axis Ax1 as a center when viewed in the up-down direction. In the present embodiment, the coil conductors 18a, 18c, 18e have a swirl shape that approaches the center while surrounding counterclockwise when viewed in the downward direction. The coil conductors 18b, 18d, 18f have a swirl shape that is nearly centered while surrounding clockwise when viewed in the downward direction. Hereinafter, the outer peripheral end portions of the coil conductors 18a to 18f will be referred to as outer peripheral end portions. The inner peripheral ends of the coil conductors 18a to 18f are referred to as inner peripheral ends.
The interlayer connection conductors v1 to v6 penetrate the resin layers 15a to 15f in the up-down direction, respectively. The interlayer connection conductor v1 electrically connects the inner peripheral end of the coil conductor 18a and the inner peripheral end of the coil conductor 18 b. The interlayer connection conductor v2 electrically connects the outer peripheral end of the coil conductor 18b and the outer peripheral end of the coil conductor 18 c. The interlayer connection conductor v3 electrically connects the inner peripheral end of the coil conductor 18c and the inner peripheral end of the coil conductor 18 d. The interlayer connection conductor v4 electrically connects the outer peripheral end of the coil conductor 18d and the outer peripheral end of the coil conductor 18 e. The interlayer connection conductor v5 is connected in series with the interlayer connection conductor v 6. The interlayer connection conductors v5 and v6 electrically connect the inner peripheral end of the coil conductor 18e and the inner peripheral end of the coil conductor 18 f.
The lead conductor 20a is located on the upper main surface of the resin layer 15 a. The lead conductor 20a is connected to the outer peripheral end of the coil conductor 18 a. The lead conductor 20a extends rightward from the outer peripheral end portion of the coil conductor 18 a. Thus, the lead conductor 20a is separated from the coil L by being separated from the surrounding tracks of the coil conductors 18a to 18 f.
The lead conductor 20b is located on the lower main surface of the resin layer 15f. The lead conductor 20b is connected to the outer peripheral end of the coil conductor 18 f. The lead conductor 20b extends rightward from the outer peripheral end portion of the coil conductor 18 f. Thus, the lead conductor 20b is separated from the coil L by being separated from the surrounding tracks of the coil conductors 18a to 18 f.
The coil conductors 18b to 18e described above are conductor layers formed by etching metal foils attached to the upper main surfaces of the resin layers 15b to 15e, respectively. The metal foil is, for example, copper foil. The coil conductors 18a and 18f are conductor layers formed by plating the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15b, respectively. The plating is, for example, copper plating. The interlayer connection conductors v1 to v6 are formed by filling conductive paste into the through holes formed in the resin layers 15a to 15e and curing the conductive paste by heating. The conductive paste is, for example, a mixture of metal powder and resin. The interlayer connection conductors v1 to v6 may be formed by plating the inner peripheral surfaces of the through holes formed in the resin layers 15a to 15 e.
Here, as shown in fig. 1, the thickness T1 of the coil conductor 18a (first coil conductor) in the up-down direction is larger (longer) than the thickness T2 of the coil conductors 18b to 18e (second coil conductor) in the up-down direction (relation 1). The thickness T1 is the shortest distance between the first top S2 and the first bottom S1 described later. The thickness T2 is the shortest distance between the second top S4 and the second bottom S3 described later. The thickness T3 of the coil conductor 18f (third coil conductor) in the up-down direction is larger (longer) than the thickness T2 of the coil conductors 18b to 18e (second coil conductor) in the up-down direction (relation 2). The thickness T3 is the shortest distance between the third top portion S6 and the third bottom portion S5 described later. The coil conductors 18b to 18e (second coil conductors) are coil conductors other than the coil conductor 18a located most upward and the coil conductor 18f located most downward among the coil conductors 18a to 18 f.
The above-described relation 1 and relation 2 may be established in all of the plurality of cross sections of the coil component 11 parallel to the vertical direction, or may be established in at least one of the plurality of cross sections of the coil component 11 parallel to the vertical direction. The thickness T1 of the coil conductor 18a in the up-down direction is an average value of the thicknesses T1 of the coil conductor 18a in the up-down direction. The thicknesses T2 and T3 are also defined as the thickness T1.
However, when viewed in the vertical direction, the direction orthogonal to the directions in which the coil conductors 18a to 18f (the first coil conductor, the second coil conductor, and the third coil conductor) extend is the line width direction. The outer edge of the coil conductor 18a (first coil conductor) has a first bottom S1 that is a plane located lowest (second direction) among the outer edges of the coil conductor 18a (first coil conductor), and a first top S2 that is a plane located highest (first direction) among the outer edges of the coil conductor 18a (first coil conductor). The first top S2 is located above the first bottom S1 (first direction DIR 1), and has a normal line parallel to the first bottom S1. In the present embodiment, the first top S2 is a plane. The first bottom S1 is fixed to the upper main surface of the resin layer 15 a. In addition, the surface roughness of the first bottom S1 is greater than the surface roughness of the first top S2. Further, the width W2 of the first top portion S2 in the line width direction is smaller than the width W1 of the first bottom portion S1 in the line width direction.
The outer edges of the coil conductors 18b to 18e (second coil conductors) have a second bottom S3 which is a plane located lowest (second direction) among the outer edges of the coil conductors 18b to 18e (second coil conductors), and a second top S4 which is a plane located highest (first direction) among the outer edges of the coil conductors 18b to 18e (second coil conductors), respectively. The second top S4 is located above the second bottom S3 (first direction DIR 1), and has a normal line parallel to the second bottom S3. The second bottoms S3 of the coil conductors 18b to 18e are fixed to the upper main surfaces of the resin layers 15b to 15e, respectively. In addition, the surface roughness of the second bottom S3 is greater than that of the second top S4. Further, the width W4 of the second top portion S4 in the line width direction is smaller than the width W3 of the second bottom portion S3 in the line width direction. In the present embodiment, the width W3 of the second bottom portion S3 in the line width direction is equal to the width W1 of the first bottom portion S1 in the line width direction. The width W4 of the second top S4 in the line width direction is larger than the width W2 of the first top S2 in the line width direction. Therefore, the first ratio P1 obtained by dividing the width W2 in the line width direction of the first top S2 by the width W1 in the line width direction of the first bottom S1 is smaller than the second ratio P2 obtained by dividing the width W4 in the line width direction of the second top S4 by the width W3 in the line width direction of the second bottom S3 (relation 3).
The outer edge of the coil conductor 18f (third coil conductor) has a third bottom S5 which is a plane located lowest (second direction) among the outer edges of the coil conductor 18f (third coil conductor), and a third top S6 which is a plane located highest (first direction) among the outer edges of the coil conductor 18f (third coil conductor). The third top S6 is located above the third bottom S5 (first direction DIR 1), and has a normal line parallel to the third bottom S5. The third bottom S5 is fixed to the lower main surface of the resin layer 15 f. In addition, the surface roughness of the third bottom S5 is greater than the surface roughness of the third top S6. The width W6 of the third top portion S6 in the line width direction is smaller than the width W5 of the third bottom portion S5 in the line width direction. In the present embodiment, the width W3 in the line width direction of the second bottom portion S3 is equal to the width W5 in the line width direction of the third bottom portion S5. The width W4 of the second top S4 in the line width direction is larger than the width W6 of the third top S6 in the line width direction. Therefore, the third ratio P3 obtained by dividing the width W6 in the line width direction of the third top portion S6 by the width W5 in the line width direction of the third bottom portion S5 is smaller than the second ratio P2 (relation 4).
The above-described relationships 3 and 4 may be established in all of the plurality of cross sections of the coil component 11 parallel to the vertical direction, or may be established in at least one of the plurality of cross sections of the coil component 11 parallel to the vertical direction. The width W1 of the first bottom portion S1 in the line width direction may be an average value of the widths W1 of the coil conductors 18a in the line width direction. The definition of the widths W2 to W6 is also the same as that of the width W1.
As shown in fig. 1, the magnet 50 is located above the coil L (first direction DIR 1). The magnet 50 overlaps the coil L when viewed in the up-down direction. The magnet 50 described above extends in the left-right direction. The left portion of the magnet 50 is the N pole. The right portion of the magnet 50 is the S pole.
The drive module 10 further includes a magnetic sensor, not shown. The magnetic sensor detects the magnetic force of the magnet 50. The magnetic sensor is mounted on the laminate 12, for example.
The driving module 10 described above includes a control circuit not shown. The magnetic sensor and the coil L are electrically connected to a control circuit. The magnetic sensor generates an output signal corresponding to the magnitude of the magnetic force detected by the magnetic sensor. The control circuit controls the magnitude of the current flowing through the coil L based on the output signal generated by the magnetic sensor. For example, if a clockwise current flows in the coil L when viewed in the downward direction, a forward current flows in the conductor located at the left portion of the coil L and a backward current flows in the conductor located at the right portion of the coil L. In the magnet 50, magnetic lines of force come out from the N pole and enter the S pole. Therefore, when a current flows in the forward direction in the conductor located at the left portion of the coil L, the conductor located at the left portion of the coil L receives a lorentz force in the left direction. When a current flows in the backward direction in the conductor located at the right portion of the coil L, the conductor located at the right portion of the coil L receives a lorentz force in the leftward direction. That is, the coil L is forced in the left direction from the magnet 50. In other words, the magnet 50 is forced from the coil L to the right. As a result, the magnet 50 is displaced rightward with respect to the coil L. However, the coil L may be displaced in the left direction with respect to the magnet 50.
On the other hand, if a counterclockwise current flows in the coil L when viewed in the downward direction, a backward current flows in the conductor located at the left portion of the coil L and a forward current flows in the conductor located at the right portion of the coil L. When a current flows in the backward direction in the conductor located at the left part of the coil L, the conductor located at the left part of the coil L receives a lorentz force in the rightward direction. When a current flows in the forward direction in the conductor located at the right portion of the coil L, the conductor located at the right portion of the coil L receives a lorentz force in the rightward direction. That is, the coil L is forced from the magnet 50 to the right. In other words, the magnet 50 is forced from the coil L to the left. As a result, the magnet 50 is displaced in the left direction with respect to the coil L. As described above, the position of the magnet 50 with respect to the coil L is changed by the magnetic force generated by the coil L. However, the coil L may be displaced rightward with respect to the magnet 50.
[ method of manufacturing coil component 11 ]
Hereinafter, a method of manufacturing the coil component 11 will be described with reference to the drawings. Fig. 3 to 5 are cross-sectional views showing a manufacturing process of the coil block 11.
First, as shown in fig. 3, coil conductors 18b to 18e (second coil conductors) are formed on the resin layers 15b to 15e, respectively (second coil conductor forming step). Specifically, metal foils are adhered to the upper main surfaces of the resin layers 15b to 15 e. A mask is formed on the metal foil. Then, the coil conductors 18b to 18e are formed by etching through a mask. Further, metal films 200a and 200b are provided on the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15 f. The metal films 200a, 200b are thinner than the metal foil.
Interlayer connection conductors v1 to v6 are formed in the resin layers 15a to 15 f. Specifically, laser beams are irradiated to the resin layers 15a to 15f, respectively, to form through holes. Thereafter, the through-hole is filled with the conductive paste.
As shown in fig. 4, after the second coil conductor forming step, the resin layers 15a to 15f are thermally bonded (thermal bonding step). Thereby, the resin layers 15a to 15f soften and flow. After cooling the resin layers 15a to 15f, the resin layers 15a to 15f are integrated. Further, the conductive paste in the through hole is cured by thermocompression bonding.
As shown in fig. 5, after the thermocompression bonding step, the thickness of the coil conductor 18a (first coil conductor) in the up-down direction is increased, and the coil conductor 18a is located in the resin layer 15a (first coil conductor forming step) located most upward (first direction DIR 1) of the plurality of resin layers 15a to 15f thermocompression bonded in the thermocompression bonding step. After the thermocompression bonding step, the thickness of the coil conductor 18f (third coil conductor) in the up-down direction is increased, and the coil conductor 18f is located in the resin layer 15f (third coil conductor forming step) located lowest (second direction DIR 2) among the plurality of resin layers 15a to 15f thermocompression bonded in the thermocompression bonding step. Thereby, the coil conductors 18a, 18f are completed. The coil conductors 18a and 18f are formed by, for example, MSAP (Modified Semi Additive Process, modified semi-additive method). In MSAP, a mask is formed on the metal films 200a, 200b. Then, a plating layer is formed by plating on the metal films 200a, 200b. Thereafter, the mask is removed. Further, unnecessary metal films 200a, 200b overlapped with the mask are removed by etching.
Finally, a protective layer 16a is formed on the upper main surface of the resin layer 15 a. A protective layer 16b is formed on the lower main surface of the resin layer 15 f. Thereby, the coil part 11 is completed.
[ Effect ]
According to the coil component 11, the positions of the coil conductors 18a to 18f can be suppressed from being deviated from the design value, and the dc resistance value of the coil L can be reduced. More specifically, in order to reduce the dc resistance value of the coil L, for example, the thickness of the coil conductors 18a to 18f in the up-down direction may be increased. Thus, the cross-sectional area of the coil conductors 18a to 18f increases, and the dc resistance values of the coil conductors 18a to 18f decrease. However, if the thickness of the coil conductors 18a to 18f in the up-down direction is large, the coil conductors 18a to 18f are likely to receive a large force in the front-rear direction and the left-right direction from the fluidized resin layers 15a to 15f at the time of thermocompression bonding of the resin layers 15a to 15 f. As a result, the positions of the coil conductors 18a to 18f deviate from the design values. As described above, it is difficult to simultaneously suppress the deviation of the positions of the coil conductors 18a to 18f from the design value and reduce the dc resistance value of the coil L.
Then, the inventors of the present application have made an ingenious design, and as a result, have conceived to apply the following relationships 1 and 3 to the coil component 11.
Relationship 1: the thickness T1 of the coil conductor 18a (first coil conductor) in the up-down direction is larger than the thickness T2 of the coil conductors 18b to 18e (second coil conductor) in the up-down direction.
Relationship 3: the first ratio P1 obtained by dividing the width W2 of the first top portion S2 in the line width direction by the width W1 of the first bottom portion S1 in the line width direction is smaller than the second ratio P2 obtained by dividing the width W4 of the second top portion S4 in the line width direction by the width W3 of the second bottom portion S3 in the line width direction.
Since the relation 1 is established, the cross-sectional area of the coil conductor 18a increases, and thus the dc resistance value of the coil conductor 18a decreases. Moreover, the positional deviation of the coil conductors 18b to 18e from the design value is suppressed by the establishment of the relationship 1 and the relationship 3. More specifically, the coil conductors 18b to 18e are located inside the resin layers 15a to 15f at the time of thermocompression bonding. Therefore, when the resin layers 15a to 15f are fluidized, the positions of the coil conductors 18c to 18e are easily deviated from the design values. Then, the relationships 1 and 3 are established. Thereby, the flatness of the coil conductor 18b is improved. More specifically, the relation 1 establishes that the thickness T2 of the coil conductor 18b in the up-down direction is smaller. Further, the second top S4 of the coil conductor 18b becomes wider by the relation 3 being established. Thus, the coil conductor 18b has a flat cross-sectional shape as defined in relation 1 and relation 3. That is, the flatness of the coil conductor 18b improves. For the same reason, the flatness of the coil conductors 18c to 18e improves. When the flatness of the coil conductors 18b to 18e is improved in this way, the coil conductors 18b to 18e are less likely to receive force in the front-rear direction and the left-right direction from the resin layers 15a to 15f fluidized at the time of thermocompression bonding. As a result, the positions of the coil conductors 18a to 18f are suppressed from deviating from the design value.
In the case where the relationships 2 and 4 are established, the dc resistance value of the coil L can be reduced while suppressing the deviation of the positions of the coil conductors 18a to 18f from the design value for the same reason as in the case where the relationships 1 and 3 are established.
The metal films 200a, 200b are thinner than the metal foil. Thus, when the coil conductors 18a and 18f are formed by MSAP, unnecessary metal films 200a and 200b overlapping the mask are easily removed by etching.
(first modification)
The coil component 11a according to the first modification will be described below with reference to the drawings. Fig. 6 is a sectional view of the coil part 11 a. Fig. 7 is an exploded perspective view of the coil component 11 a.
The coil component 11a is different from the coil component 11 in that the width of the coil conductors 18a, 18f in the line width direction is larger than the width of the coil conductors 18b to 18e in the line width direction. Thus, the width W1 of the first bottom S1 in the line width direction is larger than the width W3 of the second bottom S3 in the line width direction. The width W5 of the third bottom S5 in the line width direction is larger than the width W3 of the second bottom S3 in the line width direction. The interval d1 between the coil conductors 18a (first coil conductors) adjacent in the wire width direction is smaller than the interval d2 between the coil conductors 18b to 18e (second coil conductors) adjacent in the wire width direction. Similarly, the interval d3 between the coil conductors 18f (third coil conductors) adjacent in the wire width direction is smaller than the interval d2 between the coil conductors 18b to 18e (second coil conductors) adjacent in the wire width direction. Thus, the resin layers 15a to 15f easily flow between the coil conductors 18b to 18e (second coil conductors) adjacent to each other in the line width direction. As a result, the formation of voids between the coil conductors 18b to 18e (second coil conductors) adjacent in the wire width direction is suppressed. Other structures of the coil component 11a are the same as those of the coil component 11, and therefore, description thereof is omitted. The coil component 11a can have the same operational effects as the coil component 11.
(second modification)
The coil component 11b according to the second modification will be described below with reference to the drawings. Fig. 8 is a sectional view of the coil part 11 b. Fig. 9 is an exploded perspective view of the coil component 11 b.
The coil component 11b is different from the coil component 11 in the shape of the coil conductors 18a, 18 f. More specifically, the number of windings of each of the coil conductors 18a and 18f is greater than the number of windings of each of the coil conductors 18b to 18 e. In the present embodiment, the number of windings of each of the coil conductors 18a and 18f is about twice the number of windings of each of the coil conductors 18b to 18 e. The width of the coil conductors 18a and 18f in the line width direction is smaller than the width of the coil conductors 18b to 18e in the line width direction. That is, the width W1 of the first bottom S1 in the line width direction is smaller than the width W3 of the second bottom S3 in the line width direction. The width W5 of the third bottom S5 in the line width direction is smaller than the width W3 of the second bottom S3 in the line width direction. When viewed in the vertical direction, the coil conductor 18a overlaps the coil conductors 18b to 18e substantially as a whole. Similarly, substantially the entire coil conductor 18f overlaps the coil conductors 18b to 18 e.
In addition, in the coil component 11b, the following expressions (1) and (2) are established.
W1/T1×2＜W3/T2 …(1)
W5/T3×2＜W3/T2 …(2)
Other structures of the coil component 11b are the same as those of the coil component 11, and therefore, description thereof is omitted. The coil component 11b can provide the same operational effects as the coil component 11.
In the coil component 11b, the number of windings of the coil conductors 18a and 18f is larger than the number of windings of the coil conductors 18b to 18 e. Thereby, the inductance value of the coil L becomes large.
(third modification)
The coil component 11c according to the third modification will be described below with reference to the drawings. Fig. 10 is a sectional view of the coil part 11 c.
The coil component 11c is different from the coil component 11b in that the intervals of the coil conductors 18a adjacent in the wire width direction are uniform, and the intervals of the coil conductors 18f adjacent in the wire width direction are uniform. Other structures of the coil component 11c are the same as those of the coil component 11b, and therefore, description thereof is omitted. The coil component 11c can have the same operational effects as the coil component 11 b.
(fourth modification)
The coil component 11d according to the fourth modification will be described below with reference to the drawings. Fig. 11 is a sectional view of the coil part 11 d.
The coil component 11d is different from the coil component 11 in that the coil conductors 18d to 18f are not provided. The coil conductor 18b (second coil conductor) is located on the lower main surface of the resin layer 15 a. Thus, in the coil conductor 18b, the second bottom portion S3 is located at a position higher than the second top portion S4. The second bottom S3 is fixed to the lower main surface of the resin layer 15 a.
The thickness T1 of the coil conductor 18a (first coil conductor) in the up-down direction is larger than the thickness T3 of the coil conductor 18c (third coil conductor) in the up-down direction. The outer edge of the coil conductor 18c (third coil conductor) has a third bottom S5 which is a plane located lowest (second direction) among the outer edges of the coil conductor 18c (third coil conductor), and a third top S6 which is a plane located highest (first direction) among the outer edges of the coil conductor 18c (third coil conductor). The third top S6 is located above the third bottom S5 (first direction DIR 1), and has a normal line parallel to the third bottom S5. The width W6 of the third top S6 in the line width direction is smaller than the width W5 of the third bottom S5 in the line width direction. The first ratio P1 is smaller than the third ratio P3 obtained by dividing the width W6 of the third top portion S6 in the line width direction by the width W5 of the third bottom portion S5 in the line width direction.
Other structures of the coil component 11d are the same as those of the coil component 11, and therefore, description thereof is omitted. The coil component 11d can provide the same operational effects as the coil component 11.
Hereinafter, a method of manufacturing the coil component 11d will be described with reference to the drawings. Fig. 12 to 14 are cross-sectional views showing a manufacturing process of the coil component 11 d.
First, as shown in fig. 12, a coil conductor 18b (second coil conductor) is formed on a resin layer 15a (second coil conductor forming step). A coil conductor 18c (third coil conductor) is formed on the resin layer 15b (third coil conductor forming step). Specifically, metal foils are respectively adhered to the upper main surface of the resin layer 15a and the upper main surface of the resin layer 15 b. A mask is formed on the metal foil. Then, the coil conductors 18b and 18c are formed by etching through a mask. Further, a metal film 200a is provided on the upper main surface of the resin layer 15 a. The metal film 200a is thinner than the metal foil.
Interlayer connection conductors v1 and v2 are formed in the resin layers 15a and 15 b. Specifically, the resin layers 15a and 15b are irradiated with laser beams, respectively, to form through holes. Thereafter, the through-hole is filled with the conductive paste.
As shown in fig. 13, after the second coil conductor forming step and the third coil conductor forming step, the resin layers 15a to 15c are thermally bonded so that the coil conductors 18b (second coil conductors) and the coil conductors 18c (third coil conductors) are sequentially aligned in the downward direction (second direction DIR 2) (thermal bonding step). Thereby, the resin layers 15a to 15c soften and flow. After cooling the resin layers 15a to 15c, the resin layers 15a to 15c are integrated. Further, the conductive paste in the through hole is cured by thermocompression bonding.
As shown in fig. 14, after the thermocompression bonding step, the thickness of the coil conductor 18a (first coil conductor) in the up-down direction is increased, and the coil conductor 18a is located in the resin layer 15a (first coil conductor forming step) located most upward (first direction DIR 1) of the plurality of resin layers 15a to 15c thermocompression bonded in the thermocompression bonding step. The coil conductor 18a is formed by MSAP, for example. In MSAP, a mask is formed on the metal film 200a. Then, a plating layer is formed by performing plating on the metal film 200a. Thereafter, the mask is removed. Further, by etching, the unnecessary metal film 200a overlapped with the mask is removed.
Finally, a protective layer 16a is formed on the upper main surface of the resin layer 15 a. Thereby, the coil part 11d is completed.
(fifth modification)
The coil component 11e according to the fifth modification will be described below with reference to the drawings. Fig. 15 is a sectional view of the coil part 11 e.
The coil component 11e is different from the coil component 11d in that the positions of the resin layer 15g, the interlayer connection conductor v11, and the coil conductors 18b and 18c are different. In more detail, the resin layer 15g is located between the resin layers 15a and 15 b. The coil conductor 18b is located on the lower main surface of the resin layer 15 g. The coil conductor 18c is located on the lower main surface of the resin layer 15 b. Thus, in the coil conductor 18b, the third bottom portion S5 is located at a position above the third top portion S6. The third bottom portion S5 is fixed to the lower main surface of the resin layer 15 g. The interlayer connection conductor v11 is connected in series with the interlayer connection conductor v 1. The interlayer connection conductors v1 and v11 electrically connect the inner peripheral end of the coil conductor 18a and the inner peripheral end of the coil conductor 18 b. Other structures of the coil component 11e are the same as those of the coil component 11d, and therefore, description thereof is omitted. The coil component 11e can provide the same operational effects as the coil component 11 d.
(sixth modification)
The coil component 11f according to the sixth modification will be described below with reference to the drawings. Fig. 16 is a sectional view of the coil component 11 f.
The coil component 11f differs from the coil component 11 in the construction of the coil conductors 18a, 18 f. In more detail, in the coil component 11f, the coil conductor 18a includes a base conductor 181a and a plating layer 182a. The base conductor 181a is made of a metal foil. The plating layer 182a covers the base conductor 181a. The coil conductor 18f includes a base conductor 181f and a plating layer 182f. The base conductor 181f is made of a metal foil. The plating layer 182f covers the base conductor 181f. Other structures of the coil component 11f are the same as those of the coil component 11, and therefore, description thereof is omitted. The coil component 11f can provide the same operational effects as the coil component 11.
In the coil member 11f, the coil conductors 18a overlap with the coil conductors 18b to 18e substantially in their entirety when viewed in the vertical direction. Similarly, substantially the entire coil conductor 18f overlaps the coil conductors 18b to 18 e. Accordingly, when the resin layers 15a to 15f are thermally bonded, the coil conductors 18a to 18f are easily applied in the up-down direction, and it is difficult to apply the force to the coil conductors 18a to 18f in the front-back direction and the left-right direction. As a result, the positions of the coil conductors 18a to 18f are suppressed from deviating from the design value.
Next, a method of manufacturing the coil component 11f will be described with reference to the drawings. Fig. 17 to 19 are cross-sectional views showing a manufacturing process of the coil component 11 f.
First, as shown in fig. 17, coil conductors 18b to 18e (second coil conductors) are formed on the resin layers 15b to 15e, respectively (second coil conductor forming step). Specifically, metal foils are adhered to the upper main surfaces of the resin layers 15a to 15 f. A mask is formed on the metal foil. Then, the coil conductors 18b to 18e are formed by etching through a mask.
The base conductors 181a and 181f are formed on the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15f, respectively. Specifically, metal foils are respectively adhered to the upper main surface of the resin layer 15a and the lower main surface of the resin layer 15 f. A mask is formed on the metal foil. Then, the base conductors 181a and 181f are formed by etching through a mask.
Interlayer connection conductors v1 to v6 are formed in the resin layers 15b to 15 e. Specifically, laser beams are irradiated to the resin layers 15b to 15e, respectively, to form through holes. Thereafter, the through-hole is filled with the conductive paste.
As shown in fig. 18, the resin layers 15a to 15f are thermally bonded (thermal bonding step). Thereby, the resin layers 15a to 15f soften and flow. After cooling the resin layers 15a to 15f, the resin layers 15a to 15f are integrated. Further, the conductive paste in the through hole is cured by thermocompression bonding.
As shown in fig. 19, the thickness of the coil conductor 18a (first coil conductor) in the up-down direction is increased, and the coil conductor 18a is located in the resin layer 15a (first coil conductor forming step) located most upward (first direction DIR 1) of the plurality of resin layers 15a to 15f thermally bonded in the thermal bonding step. After the thermocompression bonding step, the thickness of the coil conductor 18f (third coil conductor) is increased, and the coil conductor 18f is located in the resin layer 15f (third coil conductor forming step) located lowest (second direction DIR 2) of the plurality of resin layers 15a to 15f thermocompression bonded in the thermocompression bonding step. Specifically, the plating layers 182a and 182f are completed by plating the base conductors 181a and 181f, respectively.
Finally, a protective layer 16a is formed on the upper main surface of the resin layer 15 a. A protective layer 16b is formed on the lower main surface of the resin layer 15 f. Thereby, the coil part 11f is completed.
(seventh modification)
The coil component 11g according to the seventh modification will be described below with reference to the drawings. Fig. 20 is a sectional view of the coil component 11 g.
The coil component 11g includes coil components 11h, 11i. The coil members 11h, 11i have the same structure as the coil member 11, respectively. The coil component 11h is mounted on the upper main surface of the coil component 11i. Thereby, the coil conductor 18f of the coil component 11h and the coil conductor 18a of the coil component 11i are electrically connected by solder.
Thus, the coil component 11g has a structure in which the coil L1 of the coil component 11h and the coil L2 of the coil component 11i are connected in series. As a result, the inductance value of the coil L increases in the coil member 11 g.
(other embodiments)
The coil component of the present utility model is not limited to the coil components 11, 11a to 11g, and can be modified within the scope of the gist thereof. The coil components 11, 11a to 11g may be combined in any manner.
The coil L has a structure in which a plurality of spiral coil conductors are connected. However, the number of windings of the plurality of coil conductors may be one or less as long as the coil L has a spiral shape.
In the driving module 10, the left part of the magnet 50 may be S-pole, and the right part of the magnet 50 may be N-pole. The magnet 50 may be a permanent magnet or an electromagnet.
The material of the resin layers 15a to 15f may be a magnetic material.
The material of the resin layers 15a to 15f may be a resin other than a thermoplastic resin.
The resin layer 15a may be further laminated thereon. A resin layer may be further laminated under the resin layer 15 f.
The lower direction may be the first direction DIR1, and the upper direction may be the second direction DIR2.
The width W1 of the first bottom S1 in the line width direction may be equal to or greater than the width W3 of the second bottom S3 in the line width direction.
The distance between the coil conductors 18a (first coil conductors) adjacent to each other in the wire width direction may be equal to or greater than the distance between the coil conductors 18b to 18e (second coil conductors) adjacent to each other in the wire width direction.
In the coil members 11, 11a to 11c, 11f, and 11g, the third ratio P3 may be equal to or greater than the second ratio P2.
In the coil members 11, 11a to 11c, 11f, and 11g, the width W5 of the third bottom portion S5 in the line width direction may be equal to or greater than the width W3 of the second bottom portion S3 in the line width direction.
In the coil members 11, 11a to 11c, 11f, and 11g, the interval between the coil conductors 18f (third coil conductors) adjacent in the wire width direction may be equal to or greater than the interval between the coil conductors 18b to 18e (second coil conductors) adjacent in the wire width direction.
In the coil members 11d and 11e, the first ratio P1 may be equal to or greater than the third ratio P3.
The coil members 11, 11a to 11f are applied to the driving module. However, the coil members 11, 11a to 11f may be used for applications other than the drive module. The coil members 11, 11a to 11f may be used as antenna elements, for example. In this case, the coil L functions as an antenna for communication or an antenna for wireless power supply.
Claims (9)
1. A coil component is characterized in that,
one of the up-down directions is a first direction, the other of the up-down directions is a second direction,
the coil component is provided with:
a laminate having a structure in which a plurality of resin layers are laminated in the up-down direction; and
a coil including a plurality of coil conductors having a line shape when viewed in an up-down direction and having a spiral shape surrounding a circumference of a central axis extending in the up-down direction, the plurality of coil conductors including a first coil conductor, a second coil conductor, and a third coil conductor arranged in this order in the second direction,
the first coil conductor is located at a position closest to the first direction among the plurality of coil conductors,
a direction orthogonal to a direction in which the first coil conductor, the second coil conductor, and the third coil conductor extend when viewed in the up-down direction is a line width direction,
The outer edge of the first coil conductor has a first bottom part being a plane most in the second direction in the outer edge of the first coil conductor and a first top part being a plane most in the first direction in the outer edge of the first coil conductor,
the width of the first top portion in the line width direction is smaller than the width of the first bottom portion in the line width direction,
the outer edge of the second coil conductor has a second bottom part which is a plane located most in the second direction in the outer edge of the second coil conductor and a second top part which is a plane located most in the first direction in the outer edge of the second coil conductor,
the width of the second top portion in the line width direction is smaller than the width of the second bottom portion in the line width direction,
the shortest distance between the first top and the first bottom is longer than the shortest distance between the second top and the second bottom,
a first ratio obtained by dividing the width of the first top portion in the line width direction by the width of the first bottom portion in the line width direction is smaller than a second ratio obtained by dividing the width of the second top portion in the line width direction by the width of the second bottom portion in the line width direction.
2. The coil component of claim 1, wherein the coil component comprises a coil,
the width of the first bottom portion in the line width direction is smaller than the width of the second bottom portion in the line width direction.
3. The coil component of claim 1, wherein the coil component comprises a coil,
the width of the first bottom portion in the line width direction is larger than the width of the second bottom portion in the line width direction.
4. A coil component according to any one of claims 1 to 3, characterized in that,
the first coil conductor, the second coil conductor, and the third coil conductor each have a vortex shape surrounding the central axis as a center for at least one turn when viewed in the up-down direction,
the interval between the first coil conductors adjacent in the line width direction is smaller than the interval between the second coil conductors adjacent in the line width direction.
5. A coil component according to any one of claims 1 to 3, characterized in that,
the third coil conductor is located at a position closest to the second direction among the plurality of coil conductors,
the outer edge of the third coil conductor has a third bottom part which is a plane located most in the second direction in the outer edge of the third coil conductor and a third top part which is a plane located most in the first direction in the outer edge of the third coil conductor,
The width of the third top portion in the line width direction is smaller than the width of the third bottom portion in the line width direction,
the shortest distance between the third top portion and the third bottom portion is longer than the shortest distance between the second top portion and the second bottom portion,
a third ratio obtained by dividing the width of the third top portion in the line width direction by the width of the third bottom portion in the line width direction is smaller than the second ratio.
6. The coil component according to claim 5, wherein,
the width of the third bottom portion in the line width direction is smaller than the width of the second bottom portion in the line width direction.
7. The coil component according to claim 5, wherein,
the width of the third bottom portion in the line width direction is larger than the width of the second bottom portion in the line width direction.
8. The coil component according to claim 5, wherein,
the first coil conductor, the second coil conductor, and the third coil conductor have a vortex shape surrounding the central axis as a center for at least one turn when viewed in the up-down direction,
the interval between the third coil conductors adjacent in the line width direction is smaller than the interval between the second coil conductors adjacent in the line width direction.
9. A coil component according to any one of claims 1 to 3, characterized in that,
the outer edge of the third coil conductor has a third bottom part which is a plane located most in the second direction in the outer edge of the third coil conductor and a third top part which is a plane located most in the first direction in the outer edge of the third coil conductor,
the width of the third top portion in the line width direction is smaller than the width of the third bottom portion in the line width direction,
the shortest distance between the first top and the first bottom is longer than the shortest distance between the third top and the third bottom,
the first ratio is smaller than a third ratio obtained by dividing the width of the third top portion in the line width direction by the width of the third bottom portion in the line width direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-132218 | 2021-08-16 | ||
| JP2021132218 | 2021-08-16 | ||
| PCT/JP2022/028172 WO2023021909A1 (en) | 2021-08-16 | 2022-07-20 | Coil component and method for manufacturing coil component |
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| Publication Number | Publication Date |
|---|---|
| CN220252959U true CN220252959U (en) | 2023-12-26 |
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| CN202290000247.1U Active CN220252959U (en) | 2021-08-16 | 2022-07-20 | Coil component |
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| Country | Link |
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| JP (1) | JP7351441B2 (en) |
| CN (1) | CN220252959U (en) |
| WO (1) | WO2023021909A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6520604B2 (en) * | 2015-09-18 | 2019-05-29 | Tdk株式会社 | Laminated coil parts |
| JP6658681B2 (en) * | 2017-06-22 | 2020-03-04 | 株式会社村田製作所 | Manufacturing method of multilayer inductor and multilayer inductor |
| JP2020013826A (en) * | 2018-07-13 | 2020-01-23 | イビデン株式会社 | Coil substrate |
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- 2022-07-20 WO PCT/JP2022/028172 patent/WO2023021909A1/en active Application Filing
- 2022-07-20 JP JP2023540834A patent/JP7351441B2/en active Active
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| WO2023021909A1 (en) | 2023-02-23 |
| JP7351441B2 (en) | 2023-09-27 |
| JPWO2023021909A1 (en) | 2023-02-23 |
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