JPS59175108A - Flat coil - Google Patents
Flat coilInfo
- Publication number
- JPS59175108A JPS59175108A JP4929883A JP4929883A JPS59175108A JP S59175108 A JPS59175108 A JP S59175108A JP 4929883 A JP4929883 A JP 4929883A JP 4929883 A JP4929883 A JP 4929883A JP S59175108 A JPS59175108 A JP S59175108A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- insulating substrate
- flat coil
- flat
- spiral
- 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
Links
- 239000003973 paint Substances 0.000 claims abstract description 16
- 230000035699 permeability Effects 0.000 claims abstract description 6
- 239000007769 metal material Substances 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 24
- 230000004907 flux Effects 0.000 abstract description 6
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000005530 etching Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 4
- 230000008021 deposition Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- 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
- H01F27/02—Casings
- H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
-
- 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
- H01F2017/048—Fixed inductances of the signal type with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【発明の詳細な説明】
発明の分野
本発明は絶縁基板上に導電キイ料をうす巻き状に形成し
て構成される扁平コイルに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat coil constructed by forming a conductive key material in a thinly wound shape on an insulating substrate.
従来技術とその問題点
絶縁基板上に導電利料をうす巻き状に形成してうす巻き
コイルとし、扁平なコイルを形成することは従来から知
られている。しかしながら絶縁基板上に形成されるうす
巻き状のコイルは線積密度が低（、またコア等を用いる
ことができないためインダクタンスが大きくできないと
いう欠点があった。さらに磁界が扁平コイルの両面に分
布するために他の回路部品と不必要な電磁結合が形成さ
れることがあり、動作を不安定にすることがあった。Prior art and its problems It has been known to form a flat coil by forming a thinly wound conductive material on an insulating substrate to form a thinly wound coil. However, a thinly wound coil formed on an insulating substrate has a low wire density (and the inductance cannot be increased because a core etc. cannot be used).Furthermore, the magnetic field is distributed on both sides of the flat coil. Therefore, unnecessary electromagnetic coupling may be formed with other circuit components, resulting in unstable operation.
発明の目的
本発明はこのような従来の扁平コイルの問題点を解消す
ることを目的とするもので、扁平コイルのインダクタン
スを大きくし不必要な磁束分布を軽減する扁平コイルを
提供することを目的とする。Purpose of the Invention The purpose of the present invention is to solve the problems of the conventional flat coil, and to provide a flat coil that increases the inductance of the flat coil and reduces unnecessary magnetic flux distribution. shall be.
発明の構成と効果
本発明は絶縁基板上の少なくとも一面に金属材料によっ
てうす巻き状に形成されたうす巻きコイルを有する扁平
コイルであって、うす巻きコイルの中心部及び外周とな
る絶縁基板上に穴を設けると共に該穴とうず巻きコイル
を含む絶縁基板上に高透磁率の磁性塗料を塗布したこと
を特徴とするものである。Structure and Effects of the Invention The present invention provides a flat coil having a thinly wound coil made of a metal material on at least one surface of an insulating substrate, the thinly wound coil having a thinly wound coil formed on at least one side thereof, the center portion and the outer periphery of the thinly wound coil being formed on the insulating substrate. It is characterized in that a hole is provided and a magnetic paint with high magnetic permeability is coated on an insulating substrate including the hole and the spiral coil.
このような特徴を有する本発明によれば、基板に塗布さ
れた塗料によって磁路が形成されるので、不必要な磁束
が外部に漏れることがなくなり、異常な回路動作を未然
に防止することができる。またコイルのインダクタンス
が大きくなり、コイルのＱも大きくすることができるの
で、種々の装置に用いることが可能となる。According to the present invention having such characteristics, since a magnetic path is formed by the paint applied to the board, unnecessary magnetic flux does not leak to the outside, and abnormal circuit operation can be prevented. can. Furthermore, since the inductance of the coil becomes large and the Q of the coil can also be made large, it becomes possible to use it in various devices.
実施例の説明
第１図は本発明による扁平コイルの一実施例を示す断面
図である。本図に示すように、この扁平コイルは絶縁基
板１上に導電金属材をエツチングまたは蒸着することに
よって、うす巻き状のコイル２を形成している。そして
このうす巻き状のコイル２の中央部分及び外周部にそれ
ぞれ図示のように穴１ａ、ｌｂを設りている。そしてう
す巻きコイル２と絶縁基板１の穴１ａ、ｌｂを含む絶縁
基板の両面に図示のように高透磁率の磁性塗料３を塗布
する。磁性塗料３ば高透磁率の材料から成り、第１図に
矢印で示ずような磁路を形成するものである。このよう
にすれば外部に磁束が漏れることがないので、他の部品
との不必要な電磁結合を避けることができる。又扁平コ
イルのインダクタンス（Ｌ）が大きくなるので、コイル
のＱ（＝ωＬ ／ Ｒ）も大きくすることが可能となる
。DESCRIPTION OF EMBODIMENTS FIG. 1 is a sectional view showing an embodiment of a flat coil according to the present invention. As shown in the figure, this flat coil is formed by etching or vapor depositing a conductive metal material on an insulating substrate 1 to form a thinly wound coil 2. Holes 1a and lb are provided in the center and outer periphery of the thinly wound coil 2, respectively, as shown. Then, a high permeability magnetic paint 3 is applied to both surfaces of the insulating substrate including the thinly wound coil 2 and the holes 1a and lb of the insulating substrate 1, as shown in the figure. The magnetic paint 3 is made of a material with high magnetic permeability and forms a magnetic path as shown by the arrows in FIG. In this way, magnetic flux will not leak to the outside, and unnecessary electromagnetic coupling with other components can be avoided. Furthermore, since the inductance (L) of the flat coil becomes large, it is also possible to increase the Q (=ωL/R) of the coil.
第２図は本発明による扁平コイルの第２の実施例を示ず
」二面図である。本図において絶縁基板１上にうず巻き
コイル２を形成すると共に、その内部及び外部に穴１ａ
、Ｉｂを設けることば前述の実施例と同様である。本実
施例ではその上部に塗布する磁性塗料３を図示のように
うず巻きコイル２の全面に塗布することなく、うず巻き
コイル２及び外周の穴１ｂの一部を露出させるようにし
たものである。このように磁性塗料３を塗布する面積を
調整することによって扁平コイルのインダクタンスを所
望の値に調整することが可能となる。FIG. 2 is a two-sided view showing a second embodiment of the flat coil according to the invention. In this figure, a spiral coil 2 is formed on an insulating substrate 1, and holes 1a are formed inside and outside the spiral coil 2.
, Ib are provided in the same way as in the previous embodiment. In this embodiment, the magnetic paint 3 applied to the upper part of the spiral coil 2 is not applied to the entire surface of the spiral coil 2 as shown in the figure, but a part of the spiral coil 2 and the hole 1b on the outer periphery are exposed. By adjusting the area to which the magnetic paint 3 is applied in this manner, it is possible to adjust the inductance of the flat coil to a desired value.
第３図は本発明による扁平コイルの第３の実施例を示す
断面図である。本実施例では図示のように絶縁基板１の
両面にうす巻きコイル２ａ、２ｂを形成している。これ
らのうす巻きコイルの２ａ２２ｂの中央と外周に穴１ａ
、ｌｂを設げることは前述の実施例と同様である。この
ようにすれば一方のうす巻きコイル、例えば２ａを一次
側のコイルとして用い、他方のコイル２ｂを二次側のコ
イルとして用いて磁気結合によるカップラを形成するこ
とができる。このようなカップラでは磁性塗料３による
磁気回路が形成されるため結合が密となり、カップラと
して結合係数を大きくすることが可能となる。FIG. 3 is a sectional view showing a third embodiment of the flat coil according to the present invention. In this embodiment, thinly wound coils 2a and 2b are formed on both sides of an insulating substrate 1 as shown in the figure. There are holes 1a in the center and outer periphery of these thinly wound coils 2a and 22b.
, lb is provided in the same manner as in the previous embodiment. In this way, one thinly wound coil, for example 2a, can be used as a primary coil, and the other coil 2b can be used as a secondary coil to form a coupler by magnetic coupling. In such a coupler, since a magnetic circuit is formed by the magnetic paint 3, the coupling becomes tight, and the coupling coefficient of the coupler can be increased.
第４図は本発明による扁平コイルの応用を示す図である
。本図において絶縁基板１上に３つのうす巻きコイル２
Ａ、２Ｂ、２Ｃを設ける。そしてうず巻きコイル２Ａと
２Ｂ間、及びうず巻きコイル２Ａと２Ｃ間に図示のよう
に磁性塗料３Ａ、３Ｂを橋架する。このようにして磁性
塗料３Ａ、３Ｂにより複数のうす巻きコイルを結合する
ことによって多数の結合回路が形成できる。そして例え
ばうす巻きコイル２Ａを送信用のコイルとし、うす巻き
コイル２Ｂ、２Ｃを夫々受信用のコイルとして相互に磁
気結合によるカップリングをさせることが可能となる。FIG. 4 is a diagram showing an application of the flat coil according to the present invention. In this figure, there are three thinly wound coils 2 on an insulating substrate 1.
A, 2B, and 2C are provided. Then, as shown in the figure, magnetic paints 3A and 3B are bridged between the spiral coils 2A and 2B and between the spiral coils 2A and 2C. In this way, a large number of coupling circuits can be formed by coupling a plurality of thinly wound coils using the magnetic paints 3A and 3B. For example, the thinly wound coil 2A can be used as a transmitting coil, and the thinly wound coils 2B and 2C can be used as receiving coils, respectively, so that they can be coupled to each other by magnetic coupling.
第５図はこの扁平コイルを高周波発振型近接スイッチの
検知コイルとして応用する場合の構成を示す断面図であ
る。本図において上面にうず巻きコイル２が形成された
絶縁基板１がコイルケース ”４の検出面４ａの裏面
に接着されている。本実施例においても絶縁基板１はう
ず巻きコイル２の中央部及びその外周部に穴１ｇ、ｌｂ
を有し、うす巻きコイル２を含む絶縁基板１の前面に磁
性塗料３が塗布され、穴１ａ、ｌｂに磁性材料が充填さ
れている。そしてこのうず巻きコイル２を用いて発振回
路を構成し、これを検知コイルとして用いる。このよう
な構成によれば近接スイッチのケース４内部の検知回路
部に検知コイル２の磁束が漏れることがなく、また検知
コイルの検出面に対しては磁路が開かれることとなって
金属物体を検知することが可能となる。そしてこのうす
巻きコイルを検知コイルとして用いることにより、検知
コイルを極めて薄く且つ小型に構成することができる。FIG. 5 is a sectional view showing a configuration in which this flat coil is applied as a detection coil of a high frequency oscillation type proximity switch. In this figure, an insulating substrate 1 on which a spiral coil 2 is formed is bonded to the back surface of a detection surface 4a of a coil case 4. In this embodiment, the insulating substrate 1 is also attached to the center of the spiral coil 2 and its outer periphery. Hole 1g, lb
A magnetic paint 3 is applied to the front surface of an insulating substrate 1 including a thinly wound coil 2, and holes 1a and lb are filled with magnetic material. Then, an oscillation circuit is constructed using this spiral coil 2, and this is used as a detection coil. With such a configuration, the magnetic flux of the detection coil 2 will not leak into the detection circuit section inside the case 4 of the proximity switch, and a magnetic path will be opened to the detection surface of the detection coil, so that it will not be possible to avoid metal objects. It becomes possible to detect. By using this thinly wound coil as a detection coil, the detection coil can be made extremely thin and compact.
このような特徴は検知コイルを含むセンサと検知回路部
を分離した分離型の近接スイッチに特に有用となる。Such a feature is particularly useful for a separate proximity switch in which a sensor including a sensing coil and a sensing circuit are separated.
第６図は本発明による扁平コイルを用いた近接スイッチ
の他の実施例を示すものである。本実施例においては扁
平コイルのインダクタンスを大きくするために、２枚の
絶縁基板１０．１１を用い基板１０．１］の両面に検知
コイル２を形成する多層構造としている。このようにす
れば検知コイルのインダクタンスを大きくし、被検知物
体の検知精度を向上させることが可能となる。FIG. 6 shows another embodiment of a proximity switch using a flat coil according to the present invention. In this embodiment, in order to increase the inductance of the flat coil, a multilayer structure is adopted in which two insulating substrates 10.11 are used and the sensing coil 2 is formed on both sides of the substrate 10.1. In this way, it is possible to increase the inductance of the detection coil and improve the detection accuracy of the object to be detected.
第１図から第３図は本発明による扁平コイルの夫々異な
る実施例を示す断面図及び上面図、第４図は本発明によ
る扁平コイルを用いたカップラを示す」二面図、第５図
及び第６図は本発明による扁平コイルを用いた近接スイ
ッチのコイル部分を示ず断面図である。
１−−−−−−絶縁基板 ｌ ａ 、 ｌ ｂ−−
−−−−穴 ２，２ａ 、 ２ ｂ、 ２ Ａ〜
２ Ｇ−−−−−−−うず巻きコイル ３゜３Ａ、３
Ｂ〜−−−一一一磁性塗料 ４−−−−−−コイルケ
ース１０．１１〜−一−−−−絶縁基板
特許出願人 立石電機株式会社
代理人 弁理士 岡本宜喜（他１名）1 to 3 are cross-sectional views and top views showing different embodiments of the flat coil according to the present invention, and FIG. 4 is a two-sided view, and FIG. FIG. 6 is a cross-sectional view, not showing the coil portion, of a proximity switch using a flat coil according to the present invention. 1---Insulating substrate la, lb---
-----Hole 2, 2a, 2b, 2A~
2 G--------- Spiral coil 3゜3A, 3
B~---111 Magnetic paint 4------Coil case 10.11~-1---Insulating substrate Patent applicant Tateishi Electric Co., Ltd. agent Patent attorney Yoshiki Okamoto (1 other person)
Claims (3)
うす巻き状に形成されたうず巻きコイルを有する扁平コ
イルであって、 前記うす巻きコイルの中心部及び外周となる前記絶縁基
板上に穴を設げると共に、該穴と前記うず巻きコイルを
含む絶縁基板上に高透磁率の磁性塗料を塗布したことを
特徴とする扁平コイル。(1) A flat coil having a spirally wound coil made of a metal material in a thinly wound shape on at least one surface of an insulating substrate, wherein holes are provided on the insulating substrate to form the center and outer periphery of the thinly wound coil. A flat coil characterized in that a magnetic paint with high magnetic permeability is coated on an insulating substrate including the hole and the spiral coil.
とを特徴とする特許請求の範囲第１項記載の扁平コイル
。(2) The flat coil according to claim 1, wherein the magnetic paint is applied to both surfaces of the insulating substrate.
とを特徴とする特許請求の範囲第１項記載の扁平コイル
。(3) The flat coil according to claim 1, wherein the magnetic paint is applied to one side of the insulating substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4929883A JPS59175108A (en) | 1983-03-24 | 1983-03-24 | Flat coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4929883A JPS59175108A (en) | 1983-03-24 | 1983-03-24 | Flat coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59175108A true JPS59175108A (en) | 1984-10-03 |
Family
ID=12827014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4929883A Pending JPS59175108A (en) | 1983-03-24 | 1983-03-24 | Flat coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59175108A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6212918U (en) * | 1985-07-08 | 1987-01-26 | ||
| JPS6490512A (en) * | 1987-10-01 | 1989-04-07 | Fujitsu Ltd | Chip type transformer |
| JPH036095A (en) * | 1989-06-01 | 1991-01-11 | Murata Mfg Co Ltd | Inductor and composite component containing conductor and manufacture thereof |
| JPH036094A (en) * | 1989-06-01 | 1991-01-11 | Murata Mfg Co Ltd | Inductor and composite component containing conductor and manufacture thereof |
| JPH0382104A (en) * | 1989-08-25 | 1991-04-08 | Amorufuasu Denshi Device Kenkyusho:Kk | Magnetic thin film transformer |
| JPH04101405A (en) * | 1990-08-20 | 1992-04-02 | West Electric Co Ltd | Thin transformer and its manufacturing method |
| JPH08222437A (en) * | 1994-12-02 | 1996-08-30 | Philips Electron Nv | Planar inductor |
| JP2002324962A (en) * | 2001-02-21 | 2002-11-08 | Toppan Printing Co Ltd | Inductor built-in printed wiring board and its manufacturing method |
| JP2008034632A (en) * | 2006-07-28 | 2008-02-14 | Seiko Epson Corp | Interposer and its manufacturing process, and semiconductor module and its manufacturing process |
| JP2008159654A (en) * | 2006-12-21 | 2008-07-10 | Seiko Epson Corp | Semiconductor device and electronic equipment |
| JP2017092121A (en) * | 2015-11-04 | 2017-05-25 | 株式会社村田製作所 | Coil component |
-
1983
- 1983-03-24 JP JP4929883A patent/JPS59175108A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6212918U (en) * | 1985-07-08 | 1987-01-26 | ||
| JPS6490512A (en) * | 1987-10-01 | 1989-04-07 | Fujitsu Ltd | Chip type transformer |
| JPH036095A (en) * | 1989-06-01 | 1991-01-11 | Murata Mfg Co Ltd | Inductor and composite component containing conductor and manufacture thereof |
| JPH036094A (en) * | 1989-06-01 | 1991-01-11 | Murata Mfg Co Ltd | Inductor and composite component containing conductor and manufacture thereof |
| JPH0382104A (en) * | 1989-08-25 | 1991-04-08 | Amorufuasu Denshi Device Kenkyusho:Kk | Magnetic thin film transformer |
| JPH04101405A (en) * | 1990-08-20 | 1992-04-02 | West Electric Co Ltd | Thin transformer and its manufacturing method |
| JPH08222437A (en) * | 1994-12-02 | 1996-08-30 | Philips Electron Nv | Planar inductor |
| JP2002324962A (en) * | 2001-02-21 | 2002-11-08 | Toppan Printing Co Ltd | Inductor built-in printed wiring board and its manufacturing method |
| JP2008034632A (en) * | 2006-07-28 | 2008-02-14 | Seiko Epson Corp | Interposer and its manufacturing process, and semiconductor module and its manufacturing process |
| JP2008159654A (en) * | 2006-12-21 | 2008-07-10 | Seiko Epson Corp | Semiconductor device and electronic equipment |
| JP2017092121A (en) * | 2015-11-04 | 2017-05-25 | 株式会社村田製作所 | Coil component |
| CN106816258A (en) * | 2015-11-04 | 2017-06-09 | 株式会社村田制作所 | Coil component |
| US10515748B2 (en) | 2015-11-04 | 2019-12-24 | Murata Manufacturing Co., Ltd. | Coil component |
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