JP2004235596A - Printed circuit board-like coil - Google Patents

Printed circuit board-like coil Download PDF

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Publication number
JP2004235596A
JP2004235596A JP2003062503A JP2003062503A JP2004235596A JP 2004235596 A JP2004235596 A JP 2004235596A JP 2003062503 A JP2003062503 A JP 2003062503A JP 2003062503 A JP2003062503 A JP 2003062503A JP 2004235596 A JP2004235596 A JP 2004235596A
Authority
JP
Japan
Prior art keywords
printed circuit
circuit board
printed
conductor
magnetic material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003062503A
Other languages
Japanese (ja)
Inventor
Koji Tanaka
浩二 田中
Takeshi Iromasu
武志 色増
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kohshin Electric Corp
Original Assignee
Kohshin Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kohshin Electric Corp filed Critical Kohshin Electric Corp
Priority to JP2003062503A priority Critical patent/JP2004235596A/en
Publication of JP2004235596A publication Critical patent/JP2004235596A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed circuit board-like coil in which a printed wiring technology for a printed circuit board easy to work can be used particularly to produce a thin choke coil and an inductor, the working can be simplified and characteristic variation can be suppressed. <P>SOLUTION: The coil is made to have a contruction in which a magnetic substance is nippedly held within a printed circuit board composed of an insulator such as a glass fiber epoxy substrate, at least one or more through holes are disposed on the printed circuit board with the magnetic substance as a center, printed conductors alternately formed on the front and rear sides of the printed circuit board and the through holes are connected to wind around the magnetic substance as one conductor. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、チョークコイルおよびインダクタの小形化、薄型化、加工性、特性、バラツキの向上に関するものである。
【0002】
【従来の技術】
この種のプリント基板形コイルの構造として、例えば図4及び図5に示す特開昭53−111465号公報に示すものがあった。
図4及び図5において、10は磁性材料基板、7は貫通穴、11は貫通穴7及び導体皮膜8a,8bと前記磁性材料基板10との間に設けられた絶縁被膜、9は貫通穴7を介して前記印刷導体8a,8bにより巻回された仮想的磁心である。
【0003】
次に加工法について説明する。
磁性材料基板10に貫通穴7を設け、この貫通穴7の内面およぴ該磁性材料基板10の両面に厚膜技術(スクリーン印刷法)や薄膜技術(蒸着法)により絶縁被膜11を被着させる。
【0004】
次に前記絶縁皮膜11の表面に同じく厚膜技術や薄膜技術により、導体皮膜8a,8bを形成することで、貫通穴7を介してらせん状導体を形成し、仮想的磁心9を形成することができる。
【0005】
【発明が解決しようとする課題】
従来のプリント基板形コイルは、硬い磁性材料基板に穴明け加工が必要であり、治工具の摩耗が大きいなど加工性が悪かった。また、磁性材料基板に穴明け後絶縁被膜を形成する必要があり、前記絶縁被膜は絶縁物のためメッキ法などの電気生成方法が使えず加工性などに問題があった。
【0006】
本発明のプリント基板形コイルは、上記のような問題点を解消するためになされたもので、特に薄型のチョークコイルおよびインダクタの製作において、加工が容易なプリント基板の印刷配線技術を使用できると共に、加工の簡素化および特性のバラツキを抑えることができるプリン基板形コイルを提供することを目的とするものである。
【0007】
【課題を解決するための手段】
この発明に係るプリント基板形コイルは、ガラス繊維入りエポキシ基板等の絶縁物よりなるプリント基板内に磁性体を挟み込み、該磁性体を中心にプリント基板に少なくとも1つ以上のスルーホールを配置し、前記磁性体を1本の導体として巻回すように前記プリント基板の表裏交互に形成された印刷導体と該スルーホールを接続する構造とした。
【0008】
上記の様に、プリント基板内に磁性体を挟み込む構造としたので、印刷導体と磁性体の絶縁が容易であり、更に磁性体による磁路の形成により空心コイルに比し高いインダクタンスが得られ、小形で特性の良い、しかもバラツキの少ない基板形コイルを提供することができる。
【0009】
【発明の実施の形態】
実施形態1.
図1は本発明のプリント基板形コイルの実施形態1を示す斜視図、図2は断面図である。
図において、表側プリント基板1aと裏側プリント基板1bは、板状の磁性体2を挟み込むように一体に接合され、プリント基板1を形成している。3はスルーホールで、前記磁性体2を中心に両側へ少なくとも1個以上配置され、且つ前記表側プリント基板1aに形成された印刷導体4a、及び前記裏側プリント基板1bに形成された印刷導体4bとそれぞれ接続されることにより、該磁性体2の周囲にらせん状の導体を形成している。
【0010】
実施の形態2
図3は本発明のプリント基板形コイルの実施形態2を示す斜視図である。
実施の形態1では、磁性体2の形状を板状としたが、実施の形態2は磁性体2の形状をリング状としたものであり、表側プリント基板1aと裏側プリント基板1bに挟み込まれたリング状の磁性体2の周囲にらせん状の導体を形成している。
また、リング状の磁性体2の中心に位置し、表側プリント基板1aと裏側プリント基板1bが一体に接合されてなるプリント基板1に一次導体貫通穴5を設け、前記一次導体貫通穴5に一次導体6が挿入されている。
【0011】
【発明の効果】
以上のようにこの発明によれば、磁性体2を表側プリント基板1aと裏側プリント基板1bの間に挟み込み、一体に接合してプリント基板1としたことにより、磁性体2の表面に絶縁被膜を設ける必要がなく、簡単に低価格のプリント基板形コイルを得ることができる。
【0012】
また、磁性体2をリング状とし、磁性体2の中心位置に一次導体貫通穴5を設けて一次導体6を挿入できる構造としたので、一次導体6に流れる交流電流を変流できる電流変換器を薄型形状で、しかも低価格に製作することができる。
【図面の簡単な説明】
【図1】本発明の実施形態1を示す斜視図である。
【図2】本発明の実施形態1を示す断面図である。
【図3】本発明の実施形態2を示す斜視図である。
【図4】従来のプリント基板形コイルを示す正面図である。
【図5】従来のプリント基板形コイルを示す断面図である。
【符号の説明】
1 プリント基板
1a 表側プリント基板
1b 裏側プリント基板
2 磁性体
3 スルーホール
4a 表側印刷導体
4b 裏側印刷導体
5 一次導体貫通穴
6 一次導体
7 貫通穴
8a 導体被膜
8b 導体被膜
9 仮想的磁心
10 磁性材料基板
11 絶縁被膜
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to miniaturization and thinning of choke coils and inductors, and to improvements in workability, characteristics, and variations.
[0002]
[Prior art]
As a structure of this type of printed board type coil, for example, there is a coil shown in Japanese Patent Application Laid-Open No. 53-111465 shown in FIGS.
4 and 5, reference numeral 10 denotes a magnetic material substrate, 7 denotes a through hole, 11 denotes an insulating film provided between the through hole 7 and the conductor films 8a and 8b and the magnetic material substrate 10, and 9 denotes a through hole. Is a virtual magnetic core wound by the printed conductors 8a and 8b through the core.
[0003]
Next, the processing method will be described.
A through-hole 7 is provided in the magnetic material substrate 10, and an insulating film 11 is applied to the inner surface of the through-hole 7 and both surfaces of the magnetic material substrate 10 by a thick film technique (screen printing method) or a thin film technique (evaporation method). Let it.
[0004]
Next, by forming conductor films 8a and 8b on the surface of the insulating film 11 by the same thick film technology or thin film technology, a helical conductor is formed through the through hole 7 and the virtual magnetic core 9 is formed. Can be.
[0005]
[Problems to be solved by the invention]
The conventional printed board type coil requires drilling on a hard magnetic material substrate, and has poor workability such as large wear of jigs and tools. In addition, it is necessary to form an insulating film on the magnetic material substrate after drilling, and since the insulating film is an insulating material, an electric generation method such as a plating method cannot be used, and there is a problem in workability.
[0006]
The printed board type coil of the present invention has been made in order to solve the above-mentioned problems, and particularly in the production of thin choke coils and inductors, it is possible to use printed wiring technology of a printed board which is easy to process. It is an object of the present invention to provide a pudding substrate type coil capable of simplifying processing and suppressing variations in characteristics.
[0007]
[Means for Solving the Problems]
The printed board type coil according to the present invention, a magnetic body is sandwiched in a printed board made of an insulating material such as an epoxy board containing glass fiber, and at least one or more through holes are arranged in the printed board around the magnetic body. The printed conductor, which is formed alternately on the front and back of the printed board, is connected to the through-hole so that the magnetic body is wound as one conductor.
[0008]
As described above, the structure in which the magnetic material is sandwiched in the printed circuit board makes it easy to insulate the printed conductor and the magnetic material, and furthermore, a magnetic path formed by the magnetic material provides a higher inductance than the air-core coil. It is possible to provide a substrate-type coil that is small, has good characteristics, and has little variation.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a first embodiment of a printed board type coil according to the present invention, and FIG. 2 is a sectional view.
In the figure, a front printed board 1a and a back printed board 1b are integrally joined so as to sandwich a plate-shaped magnetic body 2 to form a printed board 1. Reference numeral 3 denotes a through-hole, at least one of which is disposed on both sides of the magnetic body 2 as a center, and includes a printed conductor 4a formed on the front printed board 1a and a printed conductor 4b formed on the back printed board 1b. By being connected to each other, a spiral conductor is formed around the magnetic body 2.
[0010]
Embodiment 2
FIG. 3 is a perspective view showing Embodiment 2 of the printed board type coil of the present invention.
In the first embodiment, the shape of the magnetic body 2 is plate-shaped. In the second embodiment, the shape of the magnetic body 2 is ring-shaped, and is sandwiched between the front printed board 1a and the back printed board 1b. A helical conductor is formed around the ring-shaped magnetic body 2.
A primary conductor through-hole 5 is provided in the printed board 1 which is located at the center of the ring-shaped magnetic body 2 and is integrally joined with the front printed board 1a and the back printed board 1b. The conductor 6 is inserted.
[0011]
【The invention's effect】
As described above, according to the present invention, the magnetic body 2 is sandwiched between the front-side printed board 1a and the back-side printed board 1b and integrally joined to form the printed board 1, whereby an insulating coating is formed on the surface of the magnetic body 2. There is no need to provide them, and a low-priced printed board type coil can be easily obtained.
[0012]
Further, since the magnetic body 2 is formed in a ring shape and the primary conductor through hole 5 is provided at the center position of the magnetic body 2 so that the primary conductor 6 can be inserted, a current converter capable of transforming an alternating current flowing through the primary conductor 6 is provided. Can be manufactured in a thin shape and at a low price.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a sectional view showing Embodiment 1 of the present invention.
FIG. 3 is a perspective view showing Embodiment 2 of the present invention.
FIG. 4 is a front view showing a conventional printed board type coil.
FIG. 5 is a sectional view showing a conventional printed board type coil.
[Explanation of symbols]
Reference Signs List 1 printed board 1a front printed board 1b back printed board 2 magnetic material 3 through hole 4a front printed conductor 4b back printed conductor 5 primary conductor through hole 6 primary conductor 7 through hole 8a conductor coating 8b conductor coating 9 virtual magnetic core 10 magnetic material substrate 11 Insulation coating

Claims (2)

プリント基板に磁性体を挟み込み、この磁性体を中心に両側へ複数のスルーホールを配置し、印刷導体で表裏交互に接続することにより、1本の導体として磁性体の周囲にらせん状に巻き付け、チョークコイルおよびインダクタを形成することを特徴とするプリント基板形コイル。A magnetic material is sandwiched between the printed circuit boards, a plurality of through holes are arranged on both sides around the magnetic material, and the printed conductor is connected alternately to the front and back, so that a single conductor is spirally wound around the magnetic material, A printed board type coil forming a choke coil and an inductor. リング形状の磁性体をプリント基板に挟み込み、この磁性体の周囲にらせん状に巻き付けた印刷導体を設けると共に、磁性体の内径部のプリント基板に一次導体貫通穴を設け、磁性体と交叉する形で電線等の一次導体を貫通させる構造を有したことを特徴とする請求項1に記載のプリント基板形コイル。A ring-shaped magnetic material is sandwiched between printed circuit boards, a printed conductor wound spirally around the magnetic material is provided, and a primary conductor through-hole is provided in the printed circuit board at the inner diameter of the magnetic material to intersect the magnetic material. The printed circuit board type coil according to claim 1, further comprising a structure through which a primary conductor such as an electric wire penetrates.
JP2003062503A 2003-01-30 2003-01-30 Printed circuit board-like coil Pending JP2004235596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003062503A JP2004235596A (en) 2003-01-30 2003-01-30 Printed circuit board-like coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003062503A JP2004235596A (en) 2003-01-30 2003-01-30 Printed circuit board-like coil

Publications (1)

Publication Number Publication Date
JP2004235596A true JP2004235596A (en) 2004-08-19

Family

ID=32959046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003062503A Pending JP2004235596A (en) 2003-01-30 2003-01-30 Printed circuit board-like coil

Country Status (1)

Country Link
JP (1) JP2004235596A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102065636A (en) * 2009-11-12 2011-05-18 群康科技(深圳)有限公司 Circuit board as well as electronic device and liquid crystal display applying same
CN104737246A (en) * 2012-10-16 2015-06-24 高通Mems科技公司 Through substrate via inductors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102065636A (en) * 2009-11-12 2011-05-18 群康科技(深圳)有限公司 Circuit board as well as electronic device and liquid crystal display applying same
CN104737246A (en) * 2012-10-16 2015-06-24 高通Mems科技公司 Through substrate via inductors

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