JP2019040938A - コイル部品 - Google Patents
コイル部品 Download PDFInfo
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- JP2019040938A JP2019040938A JP2017160146A JP2017160146A JP2019040938A JP 2019040938 A JP2019040938 A JP 2019040938A JP 2017160146 A JP2017160146 A JP 2017160146A JP 2017160146 A JP2017160146 A JP 2017160146A JP 2019040938 A JP2019040938 A JP 2019040938A
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- 239000000758 substrate Substances 0.000 claims abstract description 149
- 238000010030 laminating Methods 0.000 claims description 4
- 101000811217 Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) 30S ribosomal protein S19e Proteins 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000005549 size reduction Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 101001120495 Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) 30S ribosomal protein S17 Proteins 0.000 description 1
- 101000656751 Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) 30S ribosomal protein S24e Proteins 0.000 description 1
- 101001114407 Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) 30S ribosomal protein S6e Proteins 0.000 description 1
- 101000729659 Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) 30S ribosomal protein S8 Proteins 0.000 description 1
- 101000718286 Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1) 30S ribosomal protein S13 Proteins 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 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
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
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- 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
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
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- 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
- H01F41/041—Printed circuit coils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
- H05K1/112—Pads for surface mounting, e.g. lay-out directly combined with via connections
- H05K1/113—Via provided in pad; Pad over filled via
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
- H01F2017/002—Details of via holes for interconnecting the layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2819—Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
- H05K1/112—Pads for surface mounting, e.g. lay-out directly combined with via connections
- H05K1/114—Pad being close to via, but not surrounding the via
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/04—Assemblies of printed circuits
- H05K2201/041—Stacked PCBs, i.e. having neither an empty space nor mounted components in between
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09063—Holes or slots in insulating substrate not used for electrical connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/095—Conductive through-holes or vias
- H05K2201/096—Vertically aligned vias, holes or stacked vias
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09672—Superposed layout, i.e. in different planes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/166—Alignment or registration; Control of registration
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4638—Aligning and fixing the circuit boards before lamination; Detecting or measuring the misalignment after lamination; Aligning external circuit patterns or via connections relative to internal circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
以上のような構成のコイル部品10によると、積層基板31〜39には、複数のスルーホールHが配列されていて、そのパターン配線315は、積層基板を貫通する中心孔の周囲を取り巻くループ状部分315a〜395aと、該ループ状部分315a〜395aからスルーホールHの配列方向と交差する交差方向に延伸すると共に互いに所定の絶縁距離だけ隔てて対向する一対の端部配線部315b1〜395b1,315b2〜395b2を備えていて、複数のスルーホールHのうち隣り合う2つのスルーホールHは、その開口の少なくとも一部が一対の端部配線部315b1〜395b1,315b2〜395b2に差し掛かって端部配線部315b1〜395b1,315b2〜395b2と電気的に接続された状態で積層基板31〜39を貫通している。また、一対の端部配線部315b1〜395b1,315b2〜395b2のうち、一方の端部配線部315b1〜355b1における一方のスルーホールHの開口は、一方の端部配線部315b1〜355b1の交差方向における中心よりも、他方の端部配線部315b2〜395b2に近接した位置に設けられている。
上述の実施の形態では、スルーホールHは、その開口の全体が端部配線部315b1〜355b1,315b2〜355b2に差し掛かっていて、該開口の周囲が端部配線部315b1〜355b1,315b2〜355b2で囲まれる構成としている。しかしながら、このような構成に代えて、図13に示すような構成としても良い。図14は、本発明の変形例に係るコイル部品の一対の端部配線部315b3,315b4を拡大して示す部分的な平面図である。
20,20A,20B…コア、
21…底部
22…周壁
23…柱脚部
30…積層基板体
31〜39…積層基板
50…金属ピン
311,321,331,341,351,361,371,381,391…プリント基板
312,322,332,342,352,362,372,382,392…1次側スルーホール列
313,323,333,343,353,363,373,383,393…2次側スルーホール列
314,324,334,344,354,364,374,384,394…中心孔
315,325,335,345,355,365,375,385,395…パターン配線
315a,325a,335a,345a,355a,365a,375a,385a,395a…ループ状部分
315b1,315b2,325b1,325b2,335b1,335b2,345b1,345b2,355b1,355b2,365b1,365b2,375b1,375b2,385b1,385b2,395b1,395b2…端部配線部
316,326,336,346,356,366,376,386,396…位置決め凹部
Claims (6)
- コイルを形成するパターン配線を有する積層基板が複数積層されることにより形成されているコイル部品であって、
前記積層基板には、複数のスルーホールが配列されていて、
前記パターン配線は、前記積層基板を貫通する中心孔の周囲を取り巻くループ状部分と、該ループ状部分から前記スルーホールの配列方向と交差する交差方向に延伸すると共に互いに所定の絶縁距離だけ隔てて対向する一対の端部配線部を備えていて、
複数の前記スルーホールのうち隣り合う2つの前記スルーホールは、その開口の少なくとも一部が一対の前記端部配線部に差し掛かって該端部配線部と電気的に接続された状態で前記積層基板を貫通していて、
一対の前記端部配線部のうち、一方の前記端部配線部における一方の前記スルーホールの開口は、一方の前記端部配線部の前記交差方向における中心よりも、他方の前記端部配線部に近接した位置に設けられている、
ことを特徴とするコイル部品。 - 請求項1記載のコイル部品であって、
一対の前記端部配線部のうち、他方の前記端部配線部における他方の前記スルーホールの開口は、他方の前記端部配線部の前記交差方向における中心よりも、一方の前記端部配線部に近接した位置に設けられている、
ことを特徴とするコイル部品。 - 請求項1または2記載のコイル部品であって、
前記スルーホールは、その開口の全体が前記端部配線部に差し掛かっていて、該開口の周囲が前記端部配線部で囲まれている、
ことを特徴とするコイル部品。 - 請求項1または2記載のコイル部品であって、
前記スルーホールは、その開口の一部が前記端部配線部に差し掛かっていて、該開口の周囲の一部が前記端部配線部で囲まれ、該開口の残りの部分が前記端部配線部から外れている、
ことを特徴とするコイル部品。 - 請求項1から4のいずれか1項に記載のコイル部品であって、
前記パターン配線は、前記中心孔の円周方向において1周の少なくとも3/4以上設けられている、
ことを特徴とするコイル部品。 - 請求項1から5のいずれか1項に記載のコイル部品であって、
前記積層基板には、前記パターン配線がトランスの1次側コイルを構成する1次側積層基板と、前記パターン配線がトランスの2次側コイルを構成する2次側積層基板とが設けられていて、
前記1次側積層基板と前記2次側積層基板とが交互に積層されている、
ことを特徴とするコイル部品。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017160146A JP6915451B2 (ja) | 2017-08-23 | 2017-08-23 | コイル部品 |
CN201810769669.5A CN109427466B (zh) | 2017-08-23 | 2018-07-13 | 线圈部件 |
EP18189697.8A EP3448137B1 (en) | 2017-08-23 | 2018-08-20 | Coil component |
US16/107,322 US11107620B2 (en) | 2017-08-23 | 2018-08-21 | Coil component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017160146A JP6915451B2 (ja) | 2017-08-23 | 2017-08-23 | コイル部品 |
Publications (3)
Publication Number | Publication Date |
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JP2019040938A true JP2019040938A (ja) | 2019-03-14 |
JP2019040938A5 JP2019040938A5 (ja) | 2020-09-10 |
JP6915451B2 JP6915451B2 (ja) | 2021-08-04 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2017160146A Active JP6915451B2 (ja) | 2017-08-23 | 2017-08-23 | コイル部品 |
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Country | Link |
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US (1) | US11107620B2 (ja) |
EP (1) | EP3448137B1 (ja) |
JP (1) | JP6915451B2 (ja) |
CN (1) | CN109427466B (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2023232437A1 (fr) * | 2022-05-30 | 2023-12-07 | Valeo Eautomotive France Sas | Ensemble et transformateur électrique planaire |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08124736A (ja) * | 1994-10-28 | 1996-05-17 | Asahi Chem Ind Co Ltd | プリントコイルおよびそれを用いたアクチュエータ |
JP2003272929A (ja) * | 2002-03-18 | 2003-09-26 | Tdk Corp | 平面トランス、多層基板およびスイッチング電源装置 |
JP2006108415A (ja) * | 2004-10-06 | 2006-04-20 | Cosel Co Ltd | トランス及び多層基板 |
WO2009131059A1 (ja) * | 2008-04-24 | 2009-10-29 | パナソニック電工株式会社 | トランスならびにそれを用いた電力変換装置、点灯装置、車両用灯具および車両 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03183106A (ja) | 1989-12-12 | 1991-08-09 | Sanken Electric Co Ltd | プリント配線板 |
JP2971220B2 (ja) * | 1991-11-13 | 1999-11-02 | 富士電気化学株式会社 | トランス用コイル素子、並びにそのコイル素子を用いたトランス、及びそのトランスの結線方法 |
JP3598405B2 (ja) * | 1995-04-24 | 2004-12-08 | 株式会社Neomax | プリントコイル部品及びプリントコイル基板 |
US6000128A (en) * | 1994-06-21 | 1999-12-14 | Sumitomo Special Metals Co., Ltd. | Process of producing a multi-layered printed-coil substrate |
EP0698896B1 (en) * | 1994-08-24 | 1998-05-13 | Yokogawa Electric Corporation | Printed coil |
US20050212640A1 (en) * | 2004-03-24 | 2005-09-29 | Chiang Man-Ho | Multi-layer printed circuit board transformer winding |
JP4893975B2 (ja) * | 2009-08-25 | 2012-03-07 | サンケン電気株式会社 | コイル装置 |
JP6425375B2 (ja) * | 2013-10-11 | 2018-11-21 | 新光電気工業株式会社 | コイル基板及びその製造方法、インダクタ |
JP6226059B2 (ja) * | 2014-03-04 | 2017-11-08 | 株式会社村田製作所 | コイル部品およびコイルモジュール、並びに、コイル部品の製造方法 |
TWI558277B (zh) * | 2014-08-19 | 2016-11-11 | 乾坤科技股份有限公司 | 電路板層間導電結構、磁性元件及其製作方法 |
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2017
- 2017-08-23 JP JP2017160146A patent/JP6915451B2/ja active Active
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2018
- 2018-07-13 CN CN201810769669.5A patent/CN109427466B/zh active Active
- 2018-08-20 EP EP18189697.8A patent/EP3448137B1/en active Active
- 2018-08-21 US US16/107,322 patent/US11107620B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08124736A (ja) * | 1994-10-28 | 1996-05-17 | Asahi Chem Ind Co Ltd | プリントコイルおよびそれを用いたアクチュエータ |
JP2003272929A (ja) * | 2002-03-18 | 2003-09-26 | Tdk Corp | 平面トランス、多層基板およびスイッチング電源装置 |
JP2006108415A (ja) * | 2004-10-06 | 2006-04-20 | Cosel Co Ltd | トランス及び多層基板 |
WO2009131059A1 (ja) * | 2008-04-24 | 2009-10-29 | パナソニック電工株式会社 | トランスならびにそれを用いた電力変換装置、点灯装置、車両用灯具および車両 |
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EP3448137A1 (en) | 2019-02-27 |
CN109427466A (zh) | 2019-03-05 |
US11107620B2 (en) | 2021-08-31 |
US20190252108A1 (en) | 2019-08-15 |
JP6915451B2 (ja) | 2021-08-04 |
CN109427466B (zh) | 2023-05-02 |
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