WO2023053442A1 - コイル装置 - Google Patents
コイル装置 Download PDFInfo
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- WO2023053442A1 WO2023053442A1 PCT/JP2021/036417 JP2021036417W WO2023053442A1 WO 2023053442 A1 WO2023053442 A1 WO 2023053442A1 JP 2021036417 W JP2021036417 W JP 2021036417W WO 2023053442 A1 WO2023053442 A1 WO 2023053442A1
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- WIPO (PCT)
- Prior art keywords
- layer
- printed wiring
- wiring portion
- wiring
- less
- Prior art date
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- 238000009713 electroplating Methods 0.000 claims description 55
- 239000000463 material Substances 0.000 claims description 20
- 238000007772 electroless plating Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 description 199
- 101100109978 Arabidopsis thaliana ARP3 gene Proteins 0.000 description 21
- 101100163122 Arabidopsis thaliana ARPC2A gene Proteins 0.000 description 21
- 101100191082 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GLC7 gene Proteins 0.000 description 21
- 101100427547 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ULS1 gene Proteins 0.000 description 21
- 101100030351 Schizosaccharomyces pombe (strain 972 / ATCC 24843) dis2 gene Proteins 0.000 description 21
- 101150117607 dis1 gene Proteins 0.000 description 21
- 238000005530 etching Methods 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000004544 sputter deposition Methods 0.000 description 10
- 238000004090 dissolution Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- XEMZLVDIUVCKGL-UHFFFAOYSA-N hydrogen peroxide;sulfuric acid Chemical compound OO.OS(O)(=O)=O XEMZLVDIUVCKGL-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
Images
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
- H01F5/00—Coils
Definitions
- the present disclosure relates to a coil device.
- Patent Document 1 Japanese Patent Laying-Open No. 2016-9854 describes a coil device.
- the coil device described in Patent Document 1 has a printed wiring board.
- a printed wiring board has a base film and a conductive pattern.
- the conductive pattern forms a coil by being spirally wound on the main surface of the base film.
- Patent Document 2 International Publication No. 2018/211733
- Patent Document 2 describes a printed wiring board.
- the printed wiring board described in Patent Document 2 has a base film and a conductive pattern.
- the conductive pattern is arranged on the main surface of the base film and constitutes a coil.
- the coil device of the present disclosure includes at least one printed wiring board.
- At least one printed wiring board includes a base film including a first main surface and a second main surface, and a first conductive pattern configured by a first wiring portion spirally wound on the first main surface. and
- the average distance between adjacent first wiring portions is 3 ⁇ m or more and 15 ⁇ m or less.
- the length of the first wiring portion is 150 mm or more and 1000 mm or less.
- FIG. 1 is an exploded perspective view of the coil device 100.
- FIG. FIG. 2 is a plan view of the printed wiring board 10.
- FIG. 3 is a bottom view of the printed wiring board 10.
- FIG. FIG. 4 is a cross-sectional view along IV-IV in FIG. 5A to 5D are process diagrams showing a method for manufacturing printed wiring board 10.
- FIG. 6 is a cross-sectional view of the base film 20 after the sputtering step S211.
- FIG. 7 is a cross-sectional view of the base film 20 in the electroless plating step S212.
- FIG. 8 is a cross-sectional view of the base film 20 after the resist forming step S22.
- FIG. 6 is a cross-sectional view of the base film 20 after the sputtering step S211.
- FIG. 7 is a cross-sectional view of the base film 20 in the electroless plating step S212.
- FIG. 8 is a cross-sectional view of the base film 20 after the resist forming
- FIG. 9 is a cross-sectional view of the base film 20 after the first electroplating step S23.
- FIG. 10 is a cross-sectional view of the base film 20 after the resist removing step S24.
- FIG. 11 is a cross-sectional view of the base film 20 after the seed layer removing step S25.
- the coil device described in Patent Document 1 and the printed wiring board described in Patent Document 2 have room for improvement in reducing the size of the coil while increasing the number of turns of the wiring portion that constitutes the coil.
- the present disclosure has been made in view of the problems of the prior art as described above. More specifically, the present disclosure provides a coil device capable of reducing the size of the coil while increasing the number of turns of the wiring portion that constitutes the coil.
- a coil device includes at least one printed wiring board.
- At least one printed wiring board includes a base film including a first main surface and a second main surface, and a first conductive pattern configured by a first wiring portion spirally wound on the first main surface. and
- the average distance between adjacent first wiring portions is 3 ⁇ m or more and 15 ⁇ m or less.
- the length of the first wiring portion is 150 mm or more and 1000 mm or less.
- the coil device of (1) above it is possible to reduce the size of the coil while increasing the number of turns of the wiring portion that constitutes the coil.
- At least one printed wiring board further has a second conductive pattern configured by a second wiring portion spirally wound on the second main surface. You may have The length of the second wiring portion may be 150 mm or more and 1000 mm or less.
- the first wiring portion includes a seed layer disposed on the first main surface and a first electroplated layer disposed on the seed layer. , a second electroplated layer covering the seed layer and the first electroplated layer.
- the seed layer may include a sputtered layer arranged on the first main surface and an electroless plated layer arranged on the sputtered layer.
- the sputter layer may be made of a material different from that of the first electroplating layer.
- the electroless plated layer may be made of the same material as the first electrolytic plated layer.
- the seed layer may be a single layer made of the same material as the first electrolytic plating layer.
- one layer may be a sputter layer.
- a value obtained by dividing the height of the first wiring portion by the width of the first wiring portion may be 0.15 or more and 5 or less.
- the width and length of the first conductive pattern in plan view may be 10 mm or less and 15 mm or less, respectively.
- the value obtained by dividing the height of the first wiring portion by the average distance between adjacent first wiring portions may be 2 or more and 25 or less.
- At least one printed wiring board may be a plurality of printed wiring boards that are stacked in the thickness direction of the base film.
- At least one of the plurality of printed wiring boards includes a second conductive portion that is spirally wound on the second main surface. It may further have a pattern.
- the length of the second wiring portion may be 150 mm or more and 1000 mm or less.
- At least one printed wiring board may be a plurality of printed wiring boards stacked in the thickness direction of the base film.
- Each of the plurality of printed wiring boards further has a second conductive pattern configured by a second wiring portion wound on the second main surface and electrically connected to the first wiring portion.
- You may have An average distance between adjacent second wiring portions may be 3 ⁇ m or more and 15 ⁇ m or less.
- the first wiring part of the first printed wiring board which is one of the plurality of printed wiring boards is the other one of the plurality of printed wiring boards adjacent to the first printed wiring board in the thickness direction of the base film. It may be electrically connected to the second wiring portion of the second printed wiring board.
- a total value of the length of the first wiring portion and the length of the second wiring portion for the plurality of printed wiring boards may be 300 mm or more and 2000 mm or less.
- a coil device includes a plurality of printed wiring boards.
- Each of the plurality of printed wiring boards includes a base film including a first main surface and a second main surface, a first conductive pattern configured by a first wiring portion wound on the first main surface, and a second conductive pattern formed by a second wiring section that is spirally wound on the second main surface and electrically connected to the first wiring section.
- a plurality of printed wiring boards are stacked in the thickness direction of the base film.
- the first wiring part of the first printed wiring board which is one of the plurality of printed wiring boards is the other one of the plurality of printed wiring boards adjacent to the first printed wiring board in the thickness direction of the base film. It may be electrically connected to the second wiring portion of the second printed wiring board.
- the average distance between adjacent first wiring portions and the average distance between adjacent second wiring portions are 3 ⁇ m or more and 15 ⁇ m or less.
- the total value of the length of the first wiring portion and the length of the second wiring portion for the plurality of printed wiring boards is 300 mm or more and 2000 mm or less.
- coil device 100 (Configuration of coil device according to embodiment) A configuration of a coil device (hereinafter referred to as "coil device 100") according to an embodiment will be described.
- FIG. 1 is an exploded perspective view of the coil device 100.
- the coil device 100 has multiple printed wiring boards 10 .
- the coil device 100 has three printed wiring boards 10 .
- the number of printed wiring boards 10 included in coil device 100 may be one.
- FIG. 2 is a plan view of the printed wiring board 10.
- FIG. 3 is a bottom view of the printed wiring board 10.
- FIG. FIG. 4 is a cross-sectional view along IV-IV in FIG.
- the printed wiring board 10 has a base film 20, a first wiring portion 30, and a second wiring portion 40.
- FIG. 1 is a plan view of the printed wiring board 10.
- FIG. 3 is a bottom view of the printed wiring board 10.
- FIG. FIG. 4 is a cross-sectional view along IV-IV in FIG.
- the printed wiring board 10 has a base film 20, a first wiring portion 30, and a second wiring portion 40.
- the base film 20 has a first main surface 20a and a second main surface 20b.
- the second principal surface 20b is the opposite surface of the first principal surface 20a.
- the direction from the first main surface 20a to the second main surface 20b is sometimes referred to as the thickness direction of the base film 20.
- the base film 20 is made of a flexible insulating material. That is, printed wiring board 10 is a flexible printed wiring board. Specific examples of the material forming the base film 20 include polyimide, polyethylene terephthalate, and fluororesin.
- the first wiring part 30 is arranged on the first main surface 20a.
- the first wiring portion 30 is spirally wound in a plan view (viewed from a direction orthogonal to the first main surface 20a).
- the first wiring portion 30 spirally wound in plan view constitutes a first conductive pattern 50 that functions as a coil.
- the outer shape of the first conductive pattern 50 is, for example, an oval shape in plan view.
- width and length of the first conductive pattern 50 in plan view are defined as width WC1 and length LC1 , respectively.
- Length L C1 is greater than width W C1 .
- Width W C1 and length L C1 are, for example, 10 mm or less and 15 mm or less, respectively.
- Width W C1 and length L C1 are, for example, 1 mm or more.
- distance DIS1 be the average distance between adjacent first wiring portions 30 .
- the distance DIS1 is 3 ⁇ m or more and 15 ⁇ m or less.
- the height of the first wiring portion 30 is assumed to be height H1.
- the height H1 is, for example, 15 ⁇ m or more and 75 ⁇ m or less.
- the width of the first wiring portion 30 is assumed to be width W1.
- the width W1 is, for example, 15 ⁇ m or more and 100 ⁇ m or less.
- the aspect ratio of the first wiring portion 30 is the value obtained by dividing the height H1 by the width W1.
- the aspect ratio of the first wiring part 30 is, for example, 0.15 or more and 5 or less.
- a value obtained by dividing the height H1 by the distance DIS1 is, for example, 2 or more and 25 or less.
- the value obtained by dividing the height H1 by the distance DIS1 is preferably 3 or more and 20 or less.
- the value obtained by dividing the height H1 by the distance DIS1 is more
- the distance DIS1 is measured by the following method. First, ten measurement points are set at equal intervals between one end and the other end of the spirally wound first wiring portion 30 . Secondly, the distance between adjacent first wiring portions 30 is measured at the central portion in the height direction of the first wiring portions 30 for each measurement point, and the sum of the measured values is calculated. Third, dividing the sum by 10 gives the distance DIS1.
- the first wiring portion 30 has a seed layer 31 , a first electroplating layer 32 and a second electroplating layer 33 .
- the seed layer 31 is arranged on the first main surface 20a.
- the first electroplating layer 32 is arranged on the seed layer 31 .
- the second electroplating layer 33 covers the seed layer 31 and the first electroplating layer 32 . That is, the second electrolytic plated layer 33 is arranged on the side surfaces of the seed layer 31 and the first electrolytic plated layer 32 and on the upper surface of the first electrolytic plated layer 32 .
- the seed layer 31 has, for example, a first layer 31a and a second layer 31b.
- the first layer 31a is arranged on the first major surface 20a.
- the first layer 31a is, for example, a sputter layer (a layer formed by sputtering).
- the first layer 31a is made of nickel-chromium alloy, for example.
- the second layer 31b is arranged on the first layer 31a.
- the second layer 31b is, for example, an electroless plating layer (a layer formed by electroless plating).
- the second layer 31b is made of copper, for example.
- the first electroplating layer 32 is a layer formed by electroplating.
- the first electroplating layer 32 is made of copper, for example. That is, the first layer 31 a is made of a material different from that of the first electroplated layer 32 , and the second layer 31 b is made of the same material as that of the first electroplated layer 32 .
- the second electrolytic plated layer 33 is a layer formed by electrolytic plating.
- the second electroplating layer 33 is made of copper, for example.
- the first layer 31a and the second layer 31b may be made of copper, for example. That is, the seed layer 31 may be made of the same material as the first electroplating layer 32 . In this case, the first layer 31a may be a nano-copper layer formed by sputtering. The seed layer 31 may not have the second layer 31b. That is, the seed layer 31 may be a single layer made of the same material as the first electrolytic plating layer 32 .
- the second wiring portion 40 is arranged on the second main surface 20b.
- the second wiring portion 40 is spirally wound in a plan view (viewed from a direction orthogonal to the second main surface 20b).
- the second wiring portion 40 spirally wound in plan view constitutes a second conductive pattern 60 that functions as a coil.
- the outer shape of the second conductive pattern 60 is, for example, an oval shape in plan view.
- width and length of the second conductive pattern 60 in plan view are defined as width WC2 and length LC2 , respectively.
- Length L C2 is greater than width W C2 .
- Width W C2 and length L C2 are, for example, 10 mm or less and 15 mm or less, respectively.
- Width W C2 and length L C2 are, for example, 1 mm or more.
- the average distance between the adjacent second wiring portions 40 be the distance DIS2.
- the distance DIS2 is 3 ⁇ m or more and 15 ⁇ m or less.
- the height of the second wiring portion 40 is assumed to be height H2.
- the height H2 is, for example, 15 ⁇ m or more and 75 ⁇ m or less.
- the width of the second wiring portion 40 is assumed to be W2.
- the width W2 is, for example, 15 ⁇ m or more and 100 ⁇ m or less.
- the aspect ratio of the second wiring portion 40 is the value obtained by dividing the height H2 by the width W2.
- the aspect ratio of the second wiring part 40 is, for example, 0.15 or more and 5 or less.
- a value obtained by dividing the height H2 by the distance DIS2 is, for example, 2 or more and 25 or less.
- the value obtained by dividing the height H2 by the distance DIS2 is preferably 3 or more and 20 or less.
- the value obtained by dividing the height H2 by the distance DIS2 is more
- the distance DIS2 is measured by the following method. First, ten measurement points are set at equal intervals between one end and the other end of the second wiring portion 40 wound in a spiral shape. Secondly, the distance between the second wiring portions 40 adjacent to each of the measurement points is measured at the central portion in the height direction of the second wiring portions 40, and the sum of the measured values is calculated. Third, dividing the sum by 10 gives the distance DIS2.
- the second wiring portion 40 has a seed layer 41 , a first electroplating layer 42 and a second electroplating layer 43 .
- the seed layer 41 is arranged on the second major surface 20b.
- the first electroplating layer 42 is arranged on the seed layer 41 .
- the second electroplating layer 43 covers the seed layer 41 and the first electroplating layer 42 . That is, the second electrolytic plated layer 43 is arranged on the side surfaces of the seed layer 41 and the first electrolytic plated layer 42 and on the upper surface of the first electrolytic plated layer 42 .
- the seed layer 41 has, for example, a first layer 41a and a second layer 41b.
- the first layer 41a is arranged on the second major surface 20b.
- the first layer 41a is, for example, a sputter layer.
- the first layer 41a is made of nickel-chromium alloy, for example.
- the second layer 41b is arranged on the first layer 41a.
- the second layer 41b is, for example, an electroless plated layer.
- the second layer 41b is made of copper, for example.
- the first electroplating layer 42 is a layer formed by electroplating.
- the first electroplating layer 42 is made of copper, for example. That is, the first layer 41 a is made of a material different from that of the first electroplated layer 42 , and the second layer 41 b is made of the same material as that of the first electroplated layer 42 .
- the second electrolytic plated layer 43 is a layer formed by electrolytic plating.
- the second electroplating layer 43 is made of copper, for example.
- the first layer 41a and the second layer 41b may be made of copper, for example. That is, the seed layer 41 may be made of the same material as the first electroplating layer 42 . In this case, the first layer 41a may be a nano-copper layer formed by sputtering. The seed layer 41 may not have the second layer 41b. That is, the seed layer 41 may be a single layer made of the same material as the first electroplating layer 42 .
- the first wiring portion 30 has a first end portion 34 and a second end portion 35 .
- a first end portion 34 and a second end portion 35 are located at both ends of the first wiring portion 30 .
- the second wiring portion 40 has a first end portion 44 and a second end portion 45 .
- a first end portion 44 and a second end portion 45 are located at both ends of the second wiring portion 40 .
- Through holes 20c are formed in the base film 20.
- the through hole 20c penetrates the base film 20 along the thickness direction.
- the second end 35 is on the first major surface 20a surrounding the through hole 20c.
- the second end 45 is on the second major surface 20b around the through hole 20c.
- the second end 35 and the second end 45 are electrically connected by a conductor (not shown) on the inner wall surface of the through hole 20c. Thereby, the first wiring portion 30 and the second wiring portion 40 are electrically connected.
- the length of the first wiring part 30 is 150 mm or more and 1000 mm or less.
- the length of the first wiring portion 30 is the length of the first wiring portion 30 between the first end 34 and the second end 35 .
- the length of the second wiring portion 40 is 150 mm or more and 1000 mm or less.
- the length of the second wiring portion 40 is the length of the second wiring portion 40 between the first end 44 and the second end 45 .
- a plurality of printed wiring boards 10 are stacked in the thickness direction of the base film 20 .
- Two printed wiring boards 10 adjacent to each other in the thickness direction of the base film 20 are referred to as a printed wiring board 10a and a printed wiring board 10b, respectively.
- First main surface 20a of printed wiring board 10a faces second main surface 20b of printed wiring board 10b.
- the first conductive pattern 50 (the first wiring portion 30) of the printed wiring board 10a and the The second conductive pattern 60 (second wiring portion 40) of the printed wiring board 10b is electrically connected.
- the two outermost printed wiring boards 10 in the thickness direction of the base film 20 are referred to as a printed wiring board 10c and a printed wiring board 10d, respectively.
- a first end portion 34 of the printed wiring board 10 c and a first end portion 44 of the printed wiring board 10 d are external connection terminals of the coil device 100 .
- the total value of the length of the first wiring part 30 and the length of the second wiring part 40 for all the printed wiring boards 10 included in the coil device 100 is, for example, 300 mm or more and 2000 mm or less.
- FIG. 5 is a process diagram showing a method for manufacturing the printed wiring board 10.
- the method for manufacturing printed wiring board 10 includes a preparation step S1 and a conductive pattern forming step S2.
- the conductive pattern forming step S2 is performed after the preparation step S1.
- the base film 20 is prepared.
- the first wiring portion 30 is not formed on the first main surface 20a of the base film 20 prepared in the preparation step S1, and the second main surface 20b of the base film 20 prepared in the preparation step S1 has The second wiring portion 40 is not formed.
- the base film 20 prepared in the preparation step S1 is not separated into pieces. That is, by performing the conductive pattern forming step S2, a plurality of printed wiring boards 10 are formed at the same time.
- the conductive pattern forming step S2 is performed using, for example, a semi-additive method.
- the conductive pattern forming step S2 includes a seed layer forming step S21, a resist forming step S22, a first electrolytic plating step S23, a resist removing step S24, a seed layer removing step S25, and a second electrolytic plating step S26. are doing.
- the resist forming step S22 is performed after the seed layer forming step S21.
- the first electroplating step S23 is performed after the resist forming step S22.
- the resist removing step S24 is performed after the first electroplating step S23.
- the seed layer removing step S25 is performed after the resist removing step S24.
- the second electroplating step S26 is performed after the seed layer removing step S25.
- the seed layer forming step S21 includes a sputtering step S211 and an electroless plating step S212.
- the electroless plating step S212 is performed after the sputtering step S211.
- FIG. 6 is a cross-sectional view of the base film 20 after the sputtering step S211. As shown in FIG. 6, in the sputtering step S211, sputtering is performed to form a first layer 31a on the first main surface 20a and a first layer 41a on the second main surface 20b. .
- FIG. 7 is a cross-sectional view of the base film 20 in the electroless plating step S212. As shown in FIG. 7, in the electroless plating step S212, electroless plating is performed to form a second layer 31b on the first layer 31a, and a second layer 41b is formed on the first layer 41a. be done.
- FIG. 8 is a cross-sectional view of the base film 20 after the resist forming step S22.
- a resist 70 is formed in the resist forming step S22.
- a resist 70 is formed on the seed layer 31 and the seed layer 41 .
- the resist 70 is formed by applying a photosensitive organic material onto the seed layers 31 and 41 and patterning the applied photosensitive organic material by exposing and developing. The seed layers 31 and 41 are partially exposed through the openings in the resist 70 .
- FIG. 9 is a cross-sectional view of the base film 20 after the first electroplating step S23.
- a first electroplating layer 32 and a first electroplating layer 42 are formed in the first electroplating step S23.
- the first electroplating layer 32 is formed on the seed layer 31 exposed from the resist 70 by performing electroplating by energizing the seed layer 31 while the base film 20 is placed in the plating solution.
- the first electroplating layer 42 is formed on the seed layer 41 exposed from the resist 70 by performing electroplating by energizing the seed layer 41 while the base film 20 is placed in the plating solution. .
- FIG. 10 is a cross-sectional view of the base film 20 after the resist removing step S24.
- the resist 70 is peeled off from the seed layers 31 and 41 and removed.
- the seed layer 31 is exposed from between the adjacent first electrolytic plated layers 32
- the seed layer 41 is exposed from between the adjacent first electrolytic plated layers 42 .
- FIG. 11 is a cross-sectional view of the base film 20 after the seed layer removing step S25. As shown in FIG. 11, in the seed layer removing step S25, the seed layer 31 exposed between the adjacent first electrolytic plated layers 32 and the seed layer 31 exposed between the adjacent first electrolytic plated layers 42 are removed. The seed layer 41 is removed by etching.
- Etching is performed by supplying an etchant between adjacent first electrolytic plated layers 32 and between adjacent first electrolytic plated layers 42 .
- the etchant is selected so that etching is rate-determined by the reaction between the reactive species in the etchant and the object to be etched rather than the diffusion of the reactive species in the etchant to the vicinity of the object to be etched.
- the etchant used is an etchant that has a dissolution reaction rate of 1.0 ⁇ m/min or less for the material (that is, copper) forming the second layers 31b and 41b.
- etching solutions include sulfuric acid hydrogen peroxide aqueous solution and sodium peroxodisulfate aqueous solution.
- the etchant is switched after the etching of the second layer 31b and the second layer 41b is completed.
- an etchant having a high selectivity with respect to the material (that is, nickel-chromium alloy) forming the first layers 31a and 41a is used. Therefore, after switching the etchant, the etching of the first electrolytic plated layer 32 and the first electrolytic plated layer 42 is difficult to progress.
- the second electroplating layer 33 and the second electroplating layer 43 are formed.
- the second electroplating layer 33 is formed by performing electroplating by energizing the seed layer 31 and the first electroplating layer 32 while the base film 20 is placed in the plating solution. It is formed over layer 32 .
- the second electroplating layer 43 is formed by performing electroplating by energizing the seed layer 41 and the first electroplating layer 42 while the base film 20 is placed in the plating solution. It is formed over the layer 42 .
- the electrical resistance of the wiring portion can be reduced.
- the wiring portion is etched too much.
- the electrical resistance of the wiring portion can also be reduced by increasing the width of the wiring portion, but in this case, the size of the coil increases.
- an etchant with a high dissolution reaction rate for the material forming the seed layer that is, an etchant in which the diffusion of the reactive species in the etchant to the vicinity of the etching target determines the etching rate
- an etchant with a high dissolution reaction rate for the material forming the seed layer that is, an etchant in which the diffusion of the reactive species in the etchant to the vicinity of the etching target determines the etching rate
- the distance between the adjacent wiring portions is shortened or the height of the wiring portions is increased, it becomes difficult for the etchant to be supplied between the adjacent wiring portions.
- variations in the etching of the seed layer increase, and the amount of etching increases in order to reliably remove the seed layer. Due to the above reasons, conventionally, it is not possible to shorten the distance between adjacent wiring portions, increase the number of turns of the wiring portion (the length of the wiring portion), and increase the height of the wiring portion. I didn't.
- the coil device 100 has a printed wiring board 10 .
- an etchant having a low dissolution reaction rate with respect to the materials forming the second layers 31b and 41b is used in the seed layer removing step S25.
- the etching in the seed layer removing step S25 is rate-determined by the reaction between the reactive species in the etchant and the object to be etched. Even if it is difficult to supply the etchant between the two layers, variations in the etching of the seed layer 31 (second layer 31b) and the seed layer 41 (second layer 41b) are unlikely to occur.
- the coil device 100 it is possible to prevent the first electrolytic plated layer 32 and the first electrolytic plated layer 42 from being excessively etched, and the pattern density of the first wiring portion 30 and the second wiring portion 40 can be reduced to can be improved.
- the coil device 100 as the height of the first wiring portion 30 and the second wiring portion 40 increases, it is possible to suppress the resistance of the first wiring portion 30 and the second wiring portion 40 from increasing. The length of the 1 wiring part 30 and the 2nd wiring part 40 can be ensured.
- the pattern density of the first wiring portion 30 and the second wiring portion 40 is improved.
- the second conductive pattern 60 can be miniaturized (more specifically, the width W C1 and the length L C1 are set to 10 mm or less and 15 mm or less, respectively, and the width W C2 and the length L C2 are set to 10 mm or less and 15 mm or less, respectively. can be below).
- the first wiring portion 30 when the value obtained by dividing the height H1 by the width W1 (the value obtained by dividing the height H2 by the width W2) is 0.15 or more and 5 or less, the first wiring portion 30 (the second wiring portion 40) , the electrical resistance of the first wiring portion 30 (second wiring portion 40) is further reduced while improving the pattern density of the adjacent first wiring portion 30 (second wiring portion 40). can do.
- the adjacent first wiring portions 30 (second wiring portions 40), the electrical resistance of the first wiring portion 30 (the second wiring portion 40) can be further reduced while improving the pattern density of 40).
- samples 1 to 11 were prepared as samples of the coil device 100.
- FIG. For samples 1 to 11, as shown in Table 1, the etchant used in the seed layer removal step S25, the width W c1 , the length L c1 , the length of the first wiring part 30, the length of the second wiring part 40 length, the sum of the length of the first wiring portion 30 and the length of the second wiring portion 40, the width W1, the distance DIS1, the height H1, the number of turns of the first wiring portion 30, and the number of turns of the second wiring portion 40 is changed.
- Width W c2 , length L c2 , width W2, distance DIS2, and height H2 are equal to width W c1 , length L c1 , width W1, distance DIS1, and height H1, respectively. omitted.
- "A” in the column of etching solution in Table 1 indicates that a sodium peroxodisulfate aqueous solution having a dissolution rate of 0.8 ⁇ m/min was used.
- “B” in the etchant column in Table 1 indicates that an iron chloride aqueous solution having a dissolution rate of 1.5 ⁇ m/min was used.
- Samples 1 and 6 had the same design, except that the etchant was different.
- Samples 3 and 7 had the same design, except that the etchants were different.
- the difference between the design value of distance DIS1 (distance DIS2) and the actual measurement value of distance DIS1 (distance DIS2) was small.
- samples 6 and 7 there was a large difference between the design value of the distance DIS1 (distance DIS2) and the measured value of the distance DIS1 (distance DIS2), and short-circuit failure occurred.
- the coil device 100 can be manufactured.
- the length of the first wiring portion 30 and the length of the second wiring portion 40 are set to 900 mm, and the length of the first wiring portion 30 and the length of the second wiring are set to 900 mm.
- the sum of the lengths of the portions 40 was set to 1800 mm.
- the distance DIS1 (distance DIS2) was in the range of 3 ⁇ m or more and 15 ⁇ m or less.
- the distance DIS1 (distance DIS2) exceeded 15 ⁇ m.
- the distance DIS1 (distance DIS2) was less than 3 ⁇ m.
- the width W c1 (width W c2 ) and the length L c1 (length L c2 ) were within the ranges of 10 mm or less and 15 mm or less, respectively.
- the width W c1 (width W c2 ) and length L c1 (length L c2 ) exceeded 10 mm and 15 mm, respectively.
- sample 9 a short circuit defect occurred.
- the distance DIS1 (distance DIS2) was in the range of 3 ⁇ m or more and 15 ⁇ m or less. Moreover, in samples 1 to 5, the width W c1 (width W c2 ) and the length L c1 (length L c2 ) were within the ranges of 10 mm or less and 15 mm or less, respectively.
- the length of the first wiring part 30 and the length of the second wiring part 40 are 150 mm or more, and the sum of the lengths of the first wiring part 30 and the length of the second wiring part 40 is It was 300 mm or more.
- the length of the first wiring portion 30 and the length of the second wiring portion 40 are less than 150 mm, and the sum of the length of the first wiring portion 30 and the length of the second wiring portion 40 is was less than 300 mm.
- the sum of the number of turns of the first wiring part 30 and the number of turns of the second wiring part 40 is 10 or more. The sum of the 40 turns was less than 10.
- the length of the first wiring portion 30 and the length of the second wiring portion 40 should be 150 mm or more, and the sum of the length of the first wiring portion 30 and the length of the second wiring portion 40 should be 300 mm. It has become clear that it is possible to reduce the size of the coil while increasing the number of turns of the wiring portion that constitutes the coil.
- the distance DIS1 (distance DIS2) was in the range of 3 ⁇ m or more and 15 ⁇ m or less. Moreover, in samples 1 to 4 and sample 11, the width W c1 (width W c2 ) and the length L c1 (length L c2 ) were within the ranges of 10 mm or less and 15 mm or less, respectively.
- samples 1 to 4 the length of the first wiring part 30 and the length of the second wiring part 40 are 1000 mm or less, and the sum of the lengths of the first wiring part 30 and the length of the second wiring part 40 is It was 2000 mm or less.
- sample 11 the length of the first wiring portion 30 and the length of the second wiring portion 40 exceeded 1000 mm, and the sum of the length of the first wiring portion 30 and the length of the second wiring portion 40 was over 2000 mm.
- the electrical resistance values of samples 1 to 4 were 30 ⁇ or less, and the electrical resistance value of sample 11 exceeded 30 ⁇ .
- the length of the first wiring portion 30 and the length of the second wiring portion 40 are set to 1000 mm or less, and the sum of the lengths of the first wiring portion 30 and the length of the second wiring portion 40 is set to 2000 mm. It became clear that the electrical resistance value of the coil device 100 can be suppressed by
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Abstract
Description
特許文献1に記載のコイル装置及び特許文献2に記載のプリント配線板は、コイルを構成している配線部の巻き数を増加させつつコイルを小型化することに改善の余地がある。
本開示のコイル装置によると、コイルを構成している配線部の巻き数を増加させつつコイルを小型化することが可能である。
まず、本開示の実施形態を列挙して説明する。
(7)上記(1)から(6)のコイル装置では、第1配線部の高さを第1配線部の幅で除した値が、0.15以上5以下であってもよい。
本開示の実施形態の詳細を、図面を参照しながら説明する。以下の図面では、同一又は相当する部分に同一の参照符号を付し、重複する説明は繰り返さない。
実施形態に係るコイル装置(以下「コイル装置100」とする)の構成を説明する。
プリント配線板10の製造方法を説明する。
コイル装置100の効果を説明する。
コイル装置100の効果を確認するため、コイル装置100のサンプルとしてサンプル1からサンプル11が準備された。サンプル1からサンプル11では、表1に示されるように、シード層除去工程S25で用いられるエッチング液、幅Wc1、長さLc1、第1配線部30の長さ、第2配線部40の長さ、第1配線部30の長さ及び第2配線部40の長さの和、幅W1、距離DIS1、高さH1、第1配線部30の巻き数及び第2配線部40の巻き数の和が変化された。幅Wc2、長さLc2、幅W2、距離DIS2、高さH2は、それぞれ、幅Wc1、長さLc1、幅W1、距離DIS1、高さH1と等しいため、表1においては記載が省略されている。なお、表1中のエッチング液の欄における「A」は、溶解速度が0.8μm/分のペルオキソ二硫酸ナトリウム水溶液が用いられたことを示している。また、表1中のエッチング液の欄における「B」は、溶解速度が1.5μm/分の塩化鉄水溶液が用いられたことを示している。
Claims (13)
- 少なくとも1つのプリント配線板を備え、
前記少なくとも1つのプリント配線板は、第1主面及び第2主面を含むベースフィルムと、前記第1主面上において渦巻き状に巻回されている第1配線部により構成されている第1導電パターンとを有し、
隣り合う前記第1配線部の間の平均距離は、3μm以上15μm以下であり、
前記第1配線部の長さは、150mm以上1000mm以下である、コイル装置。 - 前記少なくとも1つのプリント配線板は、前記第2主面上において渦巻き状に巻回されている第2配線部により構成されている第2導電パターンをさらに有し、
前記第2配線部の長さは、150mm以上1000mm以下である、請求項1に記載のコイル装置。 - 前記第1配線部は、前記第1主面上に配置されているシード層と、前記シード層上に配置されている第1電解めっき層と、前記シード層及び前記第1電解めっき層を覆っている第2電解めっき層とを有する、請求項1又は請求項2に記載のコイル装置。
- 前記シード層は、前記第1主面上に配置されているスパッタ層と、前記スパッタ層上に配置されている無電解めっき層とを含み、
前記スパッタ層は、前記第1電解めっき層と異なる材料により形成されており、
前記無電解めっき層は、前記第1電解めっき層と同一材料により形成されている、請求項3に記載のコイル装置。 - 前記シード層は、前記第1電解めっき層と同一材料により形成されている1つの層である、請求項3に記載のコイル装置。
- 前記1つの層は、スパッタ層である、請求項5に記載のコイル装置。
- 前記第1配線部の高さを前記第1配線部の幅で除した値は0.15以上5以下である、請求項1から請求項6のいずれか1項に記載のコイル装置。
- 平面視における前記第1導電パターンの幅及び長さは、それぞれ10mm以下及び15mm以下である、請求項1から請求項7のいずれか1項に記載のコイル装置。
- 前記第1配線部の高さを隣り合う前記第1配線部の間の平均距離で除した値は、2以上25以下である、請求項1から請求項8のいずれか1項に記載のコイル装置。
- 前記少なくとも1つのプリント配線板は、前記ベースフィルムの厚さ方向において重ねて配置されている複数のプリント配線板である、請求項1に記載のコイル装置。
- 前記複数のプリント配線板のうちの少なくとも1つは、前記第2主面上において渦巻き状に巻回されている第2配線部により構成されている第2導電パターンをさらに有し、
前記第2配線部の長さは、150mm以上1000mm以下である、請求項10に記載のコイル装置。 - 前記少なくとも1つのプリント配線板は、前記ベースフィルムの厚さ方向において重ねて配置されている複数のプリント配線板であり、
前記複数のプリント配線板の各々は、前記第2主面上において巻回されており、かつ前記第1配線部に電気的に接続されている第2配線部により構成されている第2導電パターンをさらに有し、
隣り合う前記第2配線部の間の平均距離は、3μm以上15μm以下であり、
前記複数のプリント配線板のうちの1つである第1プリント配線板の前記第1配線部は前記ベースフィルムの厚さ方向において前記第1プリント配線板に隣り合う前記複数のプリント配線板のうちの他の1つである第2プリント配線板の前記第2配線部に電気的に接続されており、
前記第1配線部の長さ及び前記第2配線部の長さを前記複数のプリント配線板について合計した値は、300mm以上2000mm以下である、請求項1から請求項9のいずれか1項に記載のコイル装置。 - 複数のプリント配線板を備え、
前記複数のプリント配線板の各々は、第1主面及び第2主面を含むベースフィルムと、前記第1主面上において巻回されている第1配線部により構成されている第1導電パターンと、前記第2主面上において渦巻き状に巻回されており、かつ前記第1配線部に電気的に接続されている第2配線部により構成されている第2導電パターンとを有し、
前記複数のプリント配線板は、前記ベースフィルムの厚さ方向において重ねて配置されており、
前記複数のプリント配線板のうちの1つである第1プリント配線板の前記第1配線部は前記ベースフィルムの厚さ方向において前記第1プリント配線板に隣り合う前記複数のプリント配線板のうちの他の1つの前記第2配線部に電気的に接続されており、
隣り合う前記第1配線部の間の平均距離及び隣り合う前記第2配線部の間の平均距離は3μm以上15μm以下であり、
前記第1配線部の長さ及び前記第2配線部の長さを前記複数のプリント配線板について合計した値は、300mm以上2000mm以下である、コイル装置。
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JP2022556167A JP7400989B2 (ja) | 2021-10-01 | 2021-10-01 | コイル装置 |
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WO2016147993A1 (ja) * | 2015-03-13 | 2016-09-22 | 住友電工プリントサーキット株式会社 | 平面コイル素子及び平面コイル素子の製造方法 |
JP2021013004A (ja) * | 2019-07-05 | 2021-02-04 | サムソン エレクトロ−メカニックス カンパニーリミテッド. | コイル部品 |
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WO2010007858A1 (ja) * | 2008-07-15 | 2010-01-21 | 株式会社村田製作所 | 電子部品 |
WO2016147993A1 (ja) * | 2015-03-13 | 2016-09-22 | 住友電工プリントサーキット株式会社 | 平面コイル素子及び平面コイル素子の製造方法 |
JP2021013004A (ja) * | 2019-07-05 | 2021-02-04 | サムソン エレクトロ−メカニックス カンパニーリミテッド. | コイル部品 |
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