JP3492799B2 - Chip inductor - Google Patents
Chip inductorInfo
- Publication number
- JP3492799B2 JP3492799B2 JP01619495A JP1619495A JP3492799B2 JP 3492799 B2 JP3492799 B2 JP 3492799B2 JP 01619495 A JP01619495 A JP 01619495A JP 1619495 A JP1619495 A JP 1619495A JP 3492799 B2 JP3492799 B2 JP 3492799B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- chip inductor
- magnetic core
- winding
- core
- 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.)
- Expired - Fee Related
Links
Landscapes
- Coils Or Transformers For Communication (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はモービルホン、ビデオカ
メラ、コンピュータなどの送受信回路、ノイズフィル
タ、増幅回路、電流検出などに用いられるチップインダ
クタに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone, a video camera, a transmitting / receiving circuit of a computer, a noise filter, an amplifying circuit, a chip inductor used for current detection and the like.
【０００２】[0002]
【従来の技術】従来のこの種のチップインダクタは、例
えば図４に示すように、磁芯１の両端下部に突部２を突
設し、この突部２の底面部および両端外面下部にAg／Pd
などからなる電極３を形成し、前記磁芯１の突部２間に
断面円形のコイル電線４を巻回してコイル５を形成し、
このコイル電線４の両端を前記両電極３に接続してチッ
プインダクタ本体６を形成し、さらに、このチップイン
ダクタ本体６の上部に樹脂をコートした被覆部７にて上
面を平面状に形成した構造が採られていた。2. Description of the Related Art In a conventional chip inductor of this type, as shown in FIG. 4, for example, projecting portions 2 are provided on both bottoms of a magnetic core 1 and Ag is formed on the bottom surface of the projecting portion 2 and on the outer bottoms of both ends. / Pd
An electrode 3 composed of, for example, a coil wire 4 having a circular cross section is wound between the protrusions 2 of the magnetic core 1 to form a coil 5,
A structure in which both ends of the coil electric wire 4 are connected to the both electrodes 3 to form a chip inductor body 6, and a top surface of the chip inductor body 6 is formed into a planar shape by a resin-coated covering portion 7. Was taken.
【０００３】[0003]
【発明が解決しようとする課題】上記従来のチップイン
ダクタでは、チップインダクタ本体６の上部に樹脂をコ
ートした被覆部７にて上面を平面状に形成したため、チ
ップインダクタ本体６と被覆部７とに位置ずれが生じ易
く、寸法精度が良好でない。また、コイル電線４は断面
円形のため、巻き緩みやずれなどが発生し易いという問
題や、コイルの占積率が小さく、直流抵抗値（ＲＤＣ）
が大きいという問題を有している。In the above-mentioned conventional chip inductor, since the upper surface of the chip inductor body 6 is covered with the resin-coated covering portion 7 to form a flat surface, the chip inductor body 6 and the covering portion 7 are covered with each other. Positional deviation easily occurs and dimensional accuracy is not good. Further, since the coil electric wire 4 has a circular cross section, there is a problem that loosening or misalignment is likely to occur, and the space factor of the coil is small, so that the DC resistance value (RDC)
Has the problem of being large.
【０００４】本発明は上記問題点に鑑みなされたもの
で、コイルの占積率を高め、ＲＤＣを小さくでき、上面
を容易に平面状に形成でき、コイルの巻きばらけ、緩み
が少なく整列巻きが容易で実装性や周波数特性に優れた
チップインダクタを提供するものである。The present invention has been made in view of the above problems, and can increase the space factor of the coil, reduce the RDC, easily form the upper surface into a flat shape, and reduce the winding unwinding and loosening of the coil and align winding. It provides a chip inductor that is easy to implement and has excellent mountability and frequency characteristics.
【０００５】[0005]
【課題を解決するための手段】請求項１記載の発明のチ
ップインダクタは、断面四角形状の巻芯部とこの巻芯部
の両端に形成した四角形状のフランジ部とを有し金属酸
化物にて成型された磁芯と、この磁芯の両端フランジ部
の底面部および両端外面下部に形成した膜状導体からな
る電極と、前記巻芯部に外周部上面が両端フランジ部の
外周面上面と略同一面となるまでの範囲に巻回され前記
電極に両端が圧着接続された断面略四角形状のコイル電
線と、前記磁芯の巻芯部に巻回されたコイルを形成する
コイル電線の上面部に塗布された含浸性接着剤と、前記
磁芯の巻芯部に巻回されたコイル電線の上面部とフラン
ジ部の上面部とに跨がって前記接着剤により接合された
略四角形状の耐熱耐寒性フィルムとからなるものであ
る。A chip inductor according to a first aspect of the present invention is a metal oxide having a winding core portion having a rectangular cross section and square flange portions formed at both ends of the winding core portion. A magnetic core formed by molding, an electrode composed of a film conductor formed on the bottom surface of both ends of the flange of the magnetic core and lower portions of the outer surfaces of both ends of the magnetic core, and the outer peripheral surface of the winding core portion has an outer peripheral surface upper surface of the both end flange portions. A coil wire having a substantially quadrangular cross-section wound in a range up to substantially the same surface and crimp-connected to both ends of the electrode, and an upper surface of the coil wire forming a coil wound around the core of the magnetic core. Portion of the coil wire wound around the winding core portion of the magnetic core and the upper surface portion of the flange portion are joined by the adhesive to form a substantially quadrangular shape And a heat and cold resistant film.
【０００６】請求項２記載の発明のチップインダクタ
は、請求項１記載のチップインダクタにおいて、耐熱耐
寒性フィルムを酸化物磁性材料にて形成したものであ
る。A chip inductor according to a second aspect of the present invention is the chip inductor according to the first aspect, wherein the heat and cold resistant film is formed of an oxide magnetic material.
【０００７】[0007]
【作用】請求項１記載の発明のチップインダクタは、磁
芯の断面四角形状の巻芯部に断面略四角形状のコイル電
線を外周部上面が両端フランジ部の外周面上面と略同一
面となるまでの範囲に巻回したため、コイル電線が巻き
ばらけ緩みが少なくなり、整列巻きができ、コイルの占
積率を向上でき、直流抵抗値（ＲＤＣ）を小さくでき、
また、磁芯の巻芯部に巻回されコイルを形成するコイル
電線の上面部に塗布された含浸性接着剤によりコイル電
線の上面部とフランジ部の上面部とに跨がって接合され
た略四角形状の耐熱耐寒性フィルムにてチップインダク
タの上面を容易に平面状にでき、周波数特性や実装性に
優れたチップインダクタが得られる。According to the chip inductor of the present invention, a coil wire having a substantially rectangular cross section is wound around a winding core of the magnetic core having a substantially rectangular cross section. Since the coil wire is wound in the range up to, the looseness and looseness of the coil wire can be reduced, aligned winding can be performed, the space factor of the coil can be improved, and the DC resistance value (RDC) can be reduced.
Also, the impregnating adhesive applied to the upper surface of the coil wire wound around the winding core of the magnetic core to form a coil is joined across the upper surface of the coil wire and the upper surface of the flange. The upper surface of the chip inductor can be easily planarized with the substantially rectangular heat-resistant and cold-resistant film, and a chip inductor having excellent frequency characteristics and mountability can be obtained.
【０００８】請求項２記載の発明のチップインダクタ
は、耐熱耐寒性フィルムを酸化物磁性材料にて形成する
ことにより、簡易なシールド化が容易にでき、インダク
タンス範囲の拡大が可能となる。In the chip inductor according to the second aspect of the present invention, the heat-resistant and cold-resistant film is formed of the oxide magnetic material, so that a simple shield can be easily formed and the inductance range can be expanded.
【０００９】[0009]
【実施例】次に本発明の一実施例の構成を図１ないし図
３について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the structure of an embodiment of the present invention will be described with reference to FIGS.
【００１０】11は金属酸化物にて成型された磁芯で、こ
の磁芯11は例えば、フェライトまたは透磁率μ＝１を有
するアルミナ（主成分はＡｌ2 Ｏ3 ）などで断面四角形
状の巻芯部12とこの巻芯部12の両端にそれぞれ形成した
四角形状のフランジ部13とを有し略Ｈ系状に成型されて
いる。Reference numeral 11 denotes a magnetic core molded of a metal oxide, and the magnetic core 11 is made of, for example, ferrite or alumina having a magnetic permeability μ = 1 (main component is Al 2 O 3 ) having a rectangular cross section. It has a core portion 12 and square flange portions 13 formed at both ends of the winding core portion 12, and is molded into a substantially H-shaped form.
【００１１】この磁芯11の両端フランジ部13の底面部お
よび両端外面下部に銀の上にニッケルをメッキしさらに
その上に半田（Sn-Pb 系）をメッキしたもの、または銀
−パラジウム系の上にニッケルをメッキしさらにその上
に半田（Sn-Pb 系）をメッキしたもの或は銅の上に直接
半田（Sn-Pb 系）をメッキしたものなどの膜状導体から
なる電極14がそれぞれ形成されている。The bottom of the flange 13 on both ends of the magnetic core 11 and the lower part of the outer surface of both ends are plated with nickel on silver and then plated with solder (Sn-Pb system), or of silver-palladium system. Each of the electrodes 14 is made of a film conductor such as nickel plated on top of which solder (Sn-Pb type) is plated, or copper is directly plated with solder (Sn-Pb type). Has been formed.
【００１２】また、前記磁芯11の巻芯部12にコイル15を
形成する断面略四角形状のコイル電線16が巻回され、こ
のコイル電線16はコイル15の外周部上面が両端フランジ
部13の外周面上面と略同一面となるまでの範囲に巻回す
る。そして、このコイル電線16の両端は前記電極14に両
端を圧着接続する。A coil electric wire 16 having a substantially rectangular cross section is wound around the winding core portion 12 of the magnetic core 11 so as to form a coil 15. It is wound in the range until it becomes substantially flush with the upper surface of the outer peripheral surface. Then, both ends of the coil electric wire 16 are connected to the electrode 14 by pressure bonding.
【００１３】さらに、この磁芯11の巻芯部12にコイル15
を巻回して構成されるチップインダクタ本体18のコイル
電線16の上面部にエポキシオ樹脂系、アクリル樹脂系、
ポリウレタン系などの含浸性接着剤17をディスペンサー
により、またはローラーなどにて塗布する。Further, a coil 15 is attached to the winding core portion 12 of the magnetic core 11.
Epoxy resin-based, acrylic resin-based, on the upper surface of the coil electric wire 16 of the chip inductor body 18 formed by winding
An impregnating adhesive 17 such as polyurethane is applied by a dispenser or a roller.
【００１４】そして、前記磁芯11の巻芯部12に巻回され
たコイル電線16の上面部とフランジ部13の上面部とに跨
がって略四角形状のポリイミドフィルム、ＰＰＳフィル
ム、ポリエステルフィルムなどの耐熱耐寒性フィルム20
を前記接着剤17により接合してチップインダクタ本体18
上面部を平面状に形成する。Then, a substantially rectangular polyimide film, a PPS film, a polyester film straddling the upper surface of the coil electric wire 16 and the upper surface of the flange portion 13 wound around the winding core portion 12 of the magnetic core 11. Heat and cold resistant film such as 20
And the chip inductor main body 18
The upper surface portion is formed into a flat shape.
【００１５】次にこの実施例の作用を説明する。Next, the operation of this embodiment will be described.
【００１６】磁芯11の断面四角形状の巻芯部12に一端を
一方の電極14に圧着接続した断面四角形状のコイル電線
16を整列巻きにこのコイル電線16の少なくとも外周部上
面が両端フランジ部13の外周面上面と略同一面となるま
での範囲に巻回し、このコイル電線16の他端を他方の電
極に圧着接続してコイル15を形成する。この状態で、巻
芯部12は断面略四角形状とし、コイル電線16も断面四角
形状としたため、コイル電線16の巻きばらけ緩みが少な
くなり、整列巻きが容易にでき、コイル15の占積率を向
上でき、ＲＤＣを小さくできる。また、磁芯11の巻芯部
12に巻回されコイル15を形成するコイル電線16の上面部
に含浸性接着剤17によりコイル電線16の上面部とフラン
ジ部13の上面部とに跨がって略四角形状の耐熱耐寒性フ
ィルム20を接合することによりチップインダクタ本体18
の上面を容易に平面状にでき、低コストで実装性の優れ
たチップインダクタが得られる。A coil wire having a quadrangular cross section in which one end is crimp-connected to a winding core portion 12 having a quadrangular cross section of a magnetic core 11
16 is wound in a line so that at least the upper surface of the outer peripheral portion of the coil electric wire 16 becomes substantially flush with the upper surface of the outer peripheral surface of the flange portions 13 on both ends, and the other end of the coil electric wire 16 is crimped to the other electrode. Then, the coil 15 is formed. In this state, the winding core portion 12 has a substantially quadrangular cross section, and the coil electric wire 16 has a quadrangular cross section. Therefore, loosening and loosening of the coil electric wire 16 is reduced, alignment winding can be easily performed, and the space factor of the coil 15 is reduced. And RDC can be reduced. Also, the core of the magnetic core 11
A heat- and cold-resistant film having a substantially quadrangular shape extending over the upper surface of the coil electric wire 16 and the upper surface of the flange portion 13 with an impregnating adhesive 17 on the upper surface of the coil electric wire 16 wound around 12 to form the coil 15. Chip inductor body 18 by joining 20
It is possible to easily make the upper surface of the substrate flat and obtain a chip inductor with low cost and excellent mountability.
【００１７】また、前記耐熱耐寒性フィルム20をフェラ
イト、或いはフェライトを充填した熱可塑性樹脂などの
酸化物磁性材料にて形成することにより、簡易なシール
ド化が容易にでき、インダクタンス範囲の拡大が可能と
なる。Further, by forming the heat-resistant and cold-resistant film 20 from an oxide magnetic material such as ferrite or a thermoplastic resin filled with ferrite, simple shielding can be facilitated and the inductance range can be expanded. Becomes
【００１８】[0018]
【発明の効果】請求項１記載の発明によれば、コイル電
線の巻きばらけ緩みが少なくなり、整列巻きが容易にで
き、コイルの占積率を向上できるとともに、直流抵抗値
を小さくでき、また、耐熱耐寒性フィルムにてチップイ
ンダクタの上面を容易に平面状にでき、周波数特性や実
装性に優れたチップインダクタが得られる。According to the invention as set forth in claim 1, the loosening and loosening of the coil electric wire is reduced, the aligned winding can be easily performed, the space factor of the coil can be improved, and the DC resistance value can be reduced. Further, the heat-resistant and cold-resistant film can easily make the upper surface of the chip inductor into a flat surface, and a chip inductor having excellent frequency characteristics and mountability can be obtained.
【００１９】請求項２記載の発明によれば、耐熱耐寒性
フィルムを酸化物磁性材料にて形成することにより、簡
易なシールド化が容易にでき、インダクタンス範囲の拡
大が可能となる。According to the second aspect of the present invention, by forming the heat and cold resistant film with an oxide magnetic material, a simple shield can be easily made and the inductance range can be expanded.
【図１】本発明の一実施例を示すチップインダクタの斜
視図である。FIG. 1 is a perspective view of a chip inductor showing an embodiment of the present invention.
【図２】同上チップインダクタの底面側からの斜視図で
ある。FIG. 2 is a perspective view from the bottom side of the above chip inductor.
【図３】同上チップインダクタの断面図である。FIG. 3 is a sectional view of the same chip inductor.
【図４】従来のチップインダクタの正面図である。FIG. 4 is a front view of a conventional chip inductor.
11 磁芯 12 巻芯部 13 フランジ部 14 電極 15 コイル 16 コイル電線 17 含浸性接着剤 18 チップインダクタ本体 20 耐熱耐寒性フィルム 11 magnetic core 12 winding core 13 Flange 14 electrodes 15 coils 16 coil wire 17 Impregnating adhesive 18 Chip inductor body 20 Heat and cold resistant film
Claims (2)
端に形成した四角形状のフランジ部とを有し金属酸化物
にて成型された磁芯と、 この磁芯の両端フランジ部の底面部および両端外面下部
に形成した膜状導体からなる電極と、 前記巻芯部に外周部上面が両端フランジ部の外周面上面
と略同一面となるまでの範囲に巻回され前記電極に両端
が圧着接続された断面略四角形状のコイル電線と、 前記磁芯の巻芯部に巻回されコイルを形成するコイル電
線の上面部に塗布された含浸性接着剤と、 前記磁芯の巻芯部に巻回されたコイル電線の上面部とフ
ランジ部の上面部とに跨がって前記接着剤により接合さ
れた略四角形状の耐熱耐寒性フィルムとからなることを
特徴としたチップインダクタ。1. A magnetic core formed of a metal oxide, which has a winding core portion having a quadrangular cross section and square flange portions formed at both ends of the winding core portion, and flange portions at both ends of the magnetic core. An electrode made of a film-shaped conductor formed on the bottom surface portion and lower portions on both outer surfaces of the both ends, and the winding core portion is wound in a range until the outer peripheral surface upper surface is substantially flush with the outer peripheral surface upper surface of the both-end flange portion. A coil wire having a substantially rectangular cross-section with both ends crimped and connected, an impregnating adhesive applied to the upper surface of the coil wire wound around the winding core of the magnetic core to form a coil, and the winding of the magnetic core. A chip inductor comprising a substantially rectangular heat-resistant and cold-resistant film which is joined by the adhesive across the upper surface of the coil wire wound around the core and the upper surface of the flange.
て形成したことを特徴とした請求項１記載のチップイン
ダクタ。2. The chip inductor according to claim 1, wherein the heat and cold resistant film is formed of an oxide magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01619495A JP3492799B2 (en) | 1995-02-02 | 1995-02-02 | Chip inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01619495A JP3492799B2 (en) | 1995-02-02 | 1995-02-02 | Chip inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08213248A JPH08213248A (en) | 1996-08-20 |
| JP3492799B2 true JP3492799B2 (en) | 2004-02-03 |
Family
ID=11909708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01619495A Expired - Fee Related JP3492799B2 (en) | 1995-02-02 | 1995-02-02 | Chip inductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3492799B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3195585B2 (en) | 1998-10-27 | 2001-08-06 | ティーディーケイ株式会社 | Surface mount self-induction type inductance component |
| US6437676B1 (en) | 1999-06-29 | 2002-08-20 | Matsushita Electric Industrial Co., Ltd. | Inductance element |
| JP3710042B2 (en) | 1999-09-20 | 2005-10-26 | Ｔｄｋ株式会社 | Common mode filter |
| JP2005251933A (en) * | 2004-03-03 | 2005-09-15 | Murata Mfg Co Ltd | Wound coil component |
| JP4322160B2 (en) * | 2004-04-01 | 2009-08-26 | Ｔｄｋ株式会社 | Electronic components |
| JP4014586B2 (en) * | 2004-09-02 | 2007-11-28 | Ｔｄｋ株式会社 | Electronic components |
| CN103700469A (en) * | 2012-09-27 | 2014-04-02 | 三星电机株式会社 | Coil for chip inductor, and chip inductor by using coil |
| JP7363726B2 (en) * | 2020-09-18 | 2023-10-18 | 株式会社村田製作所 | Wire-wound inductor parts |
-
1995
- 1995-02-02 JP JP01619495A patent/JP3492799B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08213248A (en) | 1996-08-20 |
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