JPH05326273A - Coil part - Google Patents

Coil part

Info

Publication number
JPH05326273A
JPH05326273A JP4127589A JP12758992A JPH05326273A JP H05326273 A JPH05326273 A JP H05326273A JP 4127589 A JP4127589 A JP 4127589A JP 12758992 A JP12758992 A JP 12758992A JP H05326273 A JPH05326273 A JP H05326273A
Authority
JP
Japan
Prior art keywords
wire
coating layer
copper
migration
metal coating
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
JP4127589A
Other languages
Japanese (ja)
Inventor
Takahiro Azuma
貴博 東
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP4127589A priority Critical patent/JPH05326273A/en
Publication of JPH05326273A publication Critical patent/JPH05326273A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coils Or Transformers For Communication (AREA)

Abstract

PURPOSE:To prevent the wire breaking accident in highly humid environment by constituting a wire material, which constitutes winding, out of a coated wire where a metallic cover layer consisting of metal hard to cause migration and an insulating cover layer are formed around a copper wire. CONSTITUTION:The bobbin 2 of a noise filter 1 is constituted of dielectric ceramic. And, for a wire material 3, a coated wire is used, in which a metallic coating layer is formed around a copper wire by plating it with Fe and an insulating coating layer is formed by covering this metallic coating layer with polyurethane. Hereby, the shifting accompanying the migration of copper is prevented by the metallic coating layer even if a current is applied under high humidity environment, so wire breaking can be surely prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、コアの周囲に線材を巻
回してなる構造を備えるコイル部品に関し、特に、上記
線材が改良されたコイル部品に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component having a structure in which a wire is wound around a core, and more particularly to a coil component improved with the wire.

【0002】[0002]

【従来の技術】図1に、従来のコイル部品の一例として
のチップ型ノイズフィルタ1を示す。ノイズフィルタ1
は、誘電体セラミックスよりなるボビン2のコア部に線
材3を巻回した構造を有する。他方、ボビン2は、コア
部の両端に一体に形成されたつば部2a,2bを有し、
つば部2aの外側主面には、端子電極4a,4b,4c
が形成されている。上記線材3の一端3aは端子電極4
aに、他端3bは端子電極4cに電気的に接続されてい
る。従って、ノイズフィルタ1では、図2に回路図で示
すように、端子電極4a,4c間にインダクタンスLが
接続されており、他方、端子電極4a,4cとアース電
極としての端子電極4bとの間にコンデンサC1 ,C2
が接続されている、π型回路が構成されている。なお、
上記線材3としては、通常、導電性に優れた銅線の周囲
に絶縁性樹脂としてポリウレタンを被覆したものが用い
られている。
2. Description of the Related Art FIG. 1 shows a chip type noise filter 1 as an example of a conventional coil component. Noise filter 1
Has a structure in which a wire rod 3 is wound around a core portion of a bobbin 2 made of a dielectric ceramic. On the other hand, the bobbin 2 has collar portions 2a and 2b integrally formed at both ends of the core portion,
The terminal electrodes 4a, 4b, 4c are provided on the outer main surface of the collar portion 2a.
Are formed. One end 3a of the wire 3 has a terminal electrode 4
a and the other end 3b are electrically connected to the terminal electrode 4c. Therefore, in the noise filter 1, as shown in the circuit diagram of FIG. 2, the inductance L is connected between the terminal electrodes 4a and 4c, while between the terminal electrodes 4a and 4c and the terminal electrode 4b as the ground electrode. And capacitors C 1 and C 2
Are connected to form a π-type circuit. In addition,
As the wire rod 3, a copper wire having excellent conductivity is usually coated with polyurethane as an insulating resin.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記の
フィルタ1を高湿度環境の下で使用した場合、線材3に
おいて断線が生じるという問題があった。上記断線は、
線材3を構成している銅のマイグレーションによるもの
と考えられる。すなわち、高湿度環境の下において端子
電極4a,4cの一方と端子電極4bとの間に電圧が印
加されると、図3に示すように、インダクタンスLを構
成している線材部分と、接地電位に接続される端子電極
4bとの間に電位差が生じる。その結果、線材3を構成
している銅がマイグレーションを起こす。他方、線材3
の絶縁被覆にはピンホール等が存在することが避けられ
ない。従って、マイグレーションの進行に伴って線材3
を構成している銅の一部が上記電位差によって端子電極
4b側に移行するため、線材3を構成している銅の一部
が失われ、断線に至る。特に、線材3がつば部2aのエ
ッジ2cと接触している部分では、元来エッジ2cの食
い込みにより機械的に断線が生じ易いため、上記マイグ
レーションの進行に伴って該エッジ2cに接触している
線材部分で断線が頻発しがちであった。
However, when the filter 1 is used in a high humidity environment, there is a problem that the wire 3 is broken. The above disconnection is
It is considered that this is due to migration of copper that constitutes the wire rod 3. That is, when a voltage is applied between one of the terminal electrodes 4a and 4c and the terminal electrode 4b under a high humidity environment, as shown in FIG. 3, the wire rod portion forming the inductance L and the ground potential are grounded. A potential difference is generated between the terminal electrode 4b and the terminal electrode 4b. As a result, the copper forming the wire rod 3 causes migration. On the other hand, wire 3
It is unavoidable that pinholes and the like are present in the insulating coating. Therefore, as the migration progresses, the wire 3
Since a part of the copper forming the wire moves to the side of the terminal electrode 4b due to the potential difference, a part of the copper forming the wire rod 3 is lost, leading to disconnection. In particular, at the portion where the wire rod 3 is in contact with the edge 2c of the brim portion 2a, mechanical breakage of the edge 2c is liable to occur mechanically, so that the wire rod 3 is in contact with the edge 2c as the migration progresses. The wire was likely to be frequently disconnected.

【0004】本発明の目的は、導電性に優れた銅を芯材
とする線材を用いたコイル部品であるにも関わらず、高
湿度環境の下における断線が生じ難い、信頼性に優れた
コイル部品を提供することにある。
Although the object of the present invention is a coil component using a wire having a core material of copper having excellent conductivity, a coil having excellent reliability in which disconnection does not easily occur in a high humidity environment. It is to provide parts.

【0005】[0005]

【課題を解決するための手段】本発明は、コアの周囲に
線材が巻回されてなる構造を有するコイル部品であっ
て、前記線材が、銅線と、銅線の周囲に設けられてお
り、かつマイグレーションが生じ難い金属よりなる金属
被覆層と、該金属被覆層の周囲に設けられた絶縁被覆層
とを有する被覆線により構成されていることを特徴とす
る、コイル部品である。すなわち、本発明のコイル部品
では、巻線を構成する線材が、銅線の周囲に上記金属被
覆層及び絶縁被覆層を形成してなる被覆線により構成さ
れていることに特徴を有する。
DISCLOSURE OF THE INVENTION The present invention is a coil component having a structure in which a wire is wound around a core, the wire being provided around a copper wire and around the copper wire. In addition, the coil component is characterized by being constituted by a coated wire having a metal coating layer made of a metal which does not easily migrate and an insulating coating layer provided around the metal coating layer. That is, the coil component of the present invention is characterized in that the wire material forming the winding wire is composed of a covered wire formed by forming the metal coating layer and the insulating coating layer around the copper wire.

【0006】上記金属被覆層は、マイグレーションが生
じ難い金属により構成されている。このマイグレーショ
ンの生じ難い金属とは、例えばPbまたはSn等のよう
にマイグレーションが起こり得るが該マイグレーション
の進行が非常に遅い金属、あるいはNi、CrまたはF
e等のように本来的にマイグレーションを起こさない金
属が挙げられる。また、上記絶縁被覆層は、線材の周囲
を電気的に絶縁するために設けられているものであり、
該絶縁被覆層を構成する材料は特に限定されないが、例
えばポリウレタン等の従来より絶縁被覆銅線に慣用され
ている適宜の材料が用いられる。
The metal coating layer is made of a metal that does not easily migrate. The metal in which migration is unlikely to occur is a metal such as Pb or Sn in which migration can occur, but the migration is very slow, or Ni, Cr or F.
Examples thereof include metals such as e that do not inherently cause migration. The insulating coating layer is provided to electrically insulate the periphery of the wire,
The material forming the insulation coating layer is not particularly limited, but an appropriate material conventionally used for insulation coating copper wires such as polyurethane may be used.

【0007】[0007]

【作用】本発明のコイル部品では、線材が導電性に優れ
た銅線を芯材として構成されており、該銅線の周囲に上
記マイグレーションが生じ難い金属よりなる金属被覆層
が形成されている。従って、高湿度環境の下で使用され
た際に、線材と電極等の他の部分との間に電位差が与え
られたとしても、金属被覆層がマイグレーションを生じ
難いため銅の移行が確実に防止される。よって、たとえ
絶縁被覆層にピンホール等が存在したとしても、銅のマ
イグレーションによる移行が防止されるため、線材の断
線が確実に防止される。
In the coil component of the present invention, the wire is composed of a copper wire having excellent conductivity as a core material, and a metal coating layer made of a metal which hardly causes the migration is formed around the copper wire. .. Therefore, when used in a high humidity environment, even if a potential difference is applied between the wire and other parts such as the electrodes, the metal coating layer is unlikely to migrate, so that copper migration is reliably prevented. To be done. Therefore, even if there are pinholes or the like in the insulating coating layer, migration due to migration of copper is prevented, so that disconnection of the wire is reliably prevented.

【0008】[0008]

【実施例の説明】以下、本発明の実施例につき図面を参
照しつつ説明する。第1の実施例 図1に示したノイズフィルタ1において、ボビン2を誘
電体セラミックスからなるもので構成し、線材3とし
て、直径50μmの銅線の周囲に、Feを0.4μmの
厚みにめっきして金属被覆層を形成し、該金属被覆層の
外側にポリウレタンを被覆して絶縁被覆層を形成してな
る被覆線を用いた。上記線材3を用いたノイズフィルタ
1を、電子部品の湿中負荷試験(JISC 5102)
の環境の下で通電し、試験したところ、線材3に断線は
全く認められなかった。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. First Embodiment In the noise filter 1 shown in FIG. 1, the bobbin 2 is made of dielectric ceramics, and the wire 3 is plated with Fe to a thickness of 0.4 μm around a copper wire having a diameter of 50 μm. Then, a coated wire was obtained by forming a metal coating layer and coating the outside of the metal coating layer with polyurethane to form an insulating coating layer. The noise filter 1 using the wire 3 is subjected to a humidity and humidity load test for electronic parts (JISC 5102).
When tested by energizing under the environment of No. 3, no breakage was observed in the wire 3.

【0009】第2の実施例 図4は、本発明の第2の実施例にかかるコモンモードチ
ョークコイル5を示す。コモンモードチョークコイル5
では、磁性体よりなるコアの周囲に実線で示す第1の被
覆線13と破線で示す第2の被覆線23とが並べられて
巻回されて巻線部が構成されている。他方、コア部に一
体に形成されたつば部2a,2bのうち、一方のつば部
2aの外側主面には、端子電極4a〜4dがコーナー部
分に形成されている。そして、第1の被覆線13の一端
13a及び他端13bが、それぞれ、端子電極4c,4
dに電気的に接続されている。他方、第2の被覆線23
の一端23a及び他端23bが端子電極4a,4bに電
気的に接続されている。上記第1,第2の被覆線13,
23は、直径50μmの銅線の周囲にFeを0.4μm
の厚みにめっきして金属被覆層を形成し、該金属被覆層
の外側にポリウレタンよりなる絶縁被覆層を形成してな
る被覆線により構成されている。上記コモンモードチョ
ークコイル5を、高湿度環境の下において通電しても、
銅のマイグレーションに伴う移行が金属被覆層により防
止でき、断線を確実に防止することができる。
Second Embodiment FIG. 4 shows a common mode choke coil 5 according to a second embodiment of the present invention. Common mode choke coil 5
In the above, a winding portion is formed by arranging and winding a first covered wire 13 shown by a solid line and a second covered wire 23 shown by a broken line around a core made of a magnetic material. On the other hand, of the flange portions 2a and 2b integrally formed with the core portion, terminal electrodes 4a to 4d are formed at corner portions on the outer main surface of one of the flange portions 2a. Then, one end 13a and the other end 13b of the first covered wire 13 are respectively connected to the terminal electrodes 4c, 4
It is electrically connected to d. On the other hand, the second covered wire 23
One end 23a and the other end 23b are electrically connected to the terminal electrodes 4a and 4b. The first and second covered wires 13,
23 is Fe with 0.4 μm around a copper wire with a diameter of 50 μm.
To form a metal coating layer, and an insulating coating layer made of polyurethane is formed on the outside of the metal coating layer. Even if the common mode choke coil 5 is energized in a high humidity environment,
The migration accompanying copper migration can be prevented by the metal coating layer, and disconnection can be reliably prevented.

【0010】第3の実施例 図5は、本発明の第3の実施例にかかるチップ型のトラ
ンスを示す側面図である。トランス6では、磁性体より
なるコア部7に一体にかつコア部7の両端に一対のつば
部8a,8bが形成されている。コア部7の周囲には、
上方に第1の被覆線9が巻回されており、下方に第2の
被覆線10が巻回されている。他方、つば部8aの外側
主面には、端子電極4a,4bが、つば部8bの外側主
面には端子電極4c,4dがそれぞれ形成されている。
第1の被覆線9の一端9aは端子電極4aに、他端9b
は端子電極4bに、それぞれ、電気的に接続されてい
る。同様に、第2の被覆線10の一端10aが端子電極
4cに、他端10bが端子電極4dに、それぞれ、電気
的に接続されている。
Third Embodiment FIG. 5 is a side view showing a chip type transformer according to a third embodiment of the present invention. In the transformer 6, a pair of flange portions 8a and 8b are formed integrally with the core portion 7 made of a magnetic material and at both ends of the core portion 7. Around the core part 7,
The first covered wire 9 is wound on the upper side, and the second covered wire 10 is wound on the lower side. On the other hand, terminal electrodes 4a and 4b are formed on the outer main surface of the collar portion 8a, and terminal electrodes 4c and 4d are formed on the outer main surface of the collar portion 8b.
One end 9a of the first covered wire 9 is on the terminal electrode 4a and the other end 9b is
Are electrically connected to the terminal electrodes 4b, respectively. Similarly, one end 10a of the second covered wire 10 is electrically connected to the terminal electrode 4c, and the other end 10b is electrically connected to the terminal electrode 4d.

【0011】本実施例のトランス6では、上記第1,第
2の被覆線9,10として、銅線を芯材とし、銅線の周
囲にFeよりなる金属被覆層が形成されており、かつ該
金属被覆層の周囲にポリウレタンよりなる絶縁被覆層が
形成されている被覆線が用いられている。従って、第
1,第2の実施例の場合と同様に、高湿度環境の下にお
いて通電したとしても、銅のマイグレーションに伴う移
行が金属被覆層により防止されるため、断線を確実に防
止することができる。なお、上記チップ型のトランス6
からも明らかなように、本発明のコイル部品なる用語
は、コアの周囲に線材を巻回してなる構造を有するコイ
ル部品一般を広く含むものであり、このようなコイル部
品一般に、本発明の被覆線を用いることにより高湿度環
境の下における断線事故を防止することができる。
In the transformer 6 of this embodiment, as the first and second coated wires 9 and 10, a copper wire is used as a core material, and a metal coating layer made of Fe is formed around the copper wire, and A coated wire in which an insulating coating layer made of polyurethane is formed around the metal coating layer is used. Therefore, as in the case of the first and second embodiments, even if electricity is applied in a high-humidity environment, migration due to copper migration is prevented by the metal coating layer, and therefore wire breakage can be reliably prevented. You can The chip-type transformer 6 is used.
As is clear from the above, the term "coil component of the present invention" broadly includes coil components in general having a structure in which a wire is wound around a core. By using a wire, it is possible to prevent a disconnection accident in a high humidity environment.

【0012】[0012]

【発明の効果】以上のように、本発明では、巻線を構成
している線材が、銅線の周囲にマイグレーションを生じ
難い金属よりなる金属被覆層及び絶縁被覆層を形成して
なる被覆線により構成されているため、高湿度環境の下
において他の部分との間に電位差が与えられたとして
も、銅のマイグレーションによる移行現象が金属被覆層
の存在により確実に防止される。従って、導電性が良好
でありかつ安価な銅を芯材として用いたコイル部品にお
いて、高湿度環境の下における断線事故を確実に防止す
ることができ、信頼性に優れたコイル部品を提供するこ
とが可能となる。
As described above, according to the present invention, the wire material forming the winding wire is formed by forming the metal coating layer and the insulating coating layer around the copper wire, the metal coating layer being made of a metal that hardly causes migration. Therefore, even if a potential difference is applied to other portions in a high humidity environment, the migration phenomenon due to copper migration is reliably prevented by the presence of the metal coating layer. Therefore, in a coil component using copper as a core material, which has good conductivity and is inexpensive, it is possible to reliably prevent a disconnection accident in a high humidity environment, and to provide a coil component having excellent reliability. Is possible.

【図面の簡単な説明】[Brief description of drawings]

【図1】コイル部品の一例としてのチップ型ノイズフィ
ルタを示す斜視図。
FIG. 1 is a perspective view showing a chip type noise filter as an example of a coil component.

【図2】図1に示したノイズフィルタの等価回路を示す
図。
FIG. 2 is a diagram showing an equivalent circuit of the noise filter shown in FIG.

【図3】従来技術の問題点を説明するための回路図。FIG. 3 is a circuit diagram for explaining a problem of the conventional technique.

【図4】本発明の第2の実施例のチップ型チョークコイ
ルを示す斜視図。
FIG. 4 is a perspective view showing a chip type choke coil according to a second embodiment of the present invention.

【図5】本発明の第3の実施例にかかるチップ型トラン
スを示す側面図。
FIG. 5 is a side view showing a chip type transformer according to a third embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…コイル部品としてのノイズフィルタ 3…線材 4a〜4c…端子電極 DESCRIPTION OF SYMBOLS 1 ... Noise filter as a coil component 3 ... Wires 4a-4c ... Terminal electrodes

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 コアの周囲に線材が巻回されてなる構造
を有するコイル部品であって、 前記線材が、銅線と、該銅線の周囲に形成されておりか
つマイグレーションが生じ難い金属よりなる金属被覆層
と、該金属被覆層の周囲に設けられた絶縁被覆層とを有
する被覆線により構成されていることを特徴とする、コ
イル部品。
1. A coil component having a structure in which a wire is wound around a core, wherein the wire is made of a copper wire and a metal that is formed around the copper wire and is resistant to migration. A coil component, comprising a coated wire having a metal coating layer consisting of: and an insulating coating layer provided around the metal coating layer.
JP4127589A 1992-05-20 1992-05-20 Coil part Pending JPH05326273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4127589A JPH05326273A (en) 1992-05-20 1992-05-20 Coil part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4127589A JPH05326273A (en) 1992-05-20 1992-05-20 Coil part

Publications (1)

Publication Number Publication Date
JPH05326273A true JPH05326273A (en) 1993-12-10

Family

ID=14963817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4127589A Pending JPH05326273A (en) 1992-05-20 1992-05-20 Coil part

Country Status (1)

Country Link
JP (1) JPH05326273A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009283986A (en) * 2009-09-03 2009-12-03 Taiyo Yuden Co Ltd Electronic component with externally connected electrode, and circuit module
CN104995698A (en) * 2013-02-13 2015-10-21 株式会社村田制作所 Electronic component

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS421339Y1 (en) * 1964-10-31 1967-01-26
JPS636709B2 (en) * 1982-12-29 1988-02-10 Shimizu Construction Co Ltd
JPH0210623B2 (en) * 1983-06-30 1990-03-08 Nippon Electric Co
JPH0398210A (en) * 1989-09-08 1991-04-23 Totoku Electric Co Ltd Complex metal plating wire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS421339Y1 (en) * 1964-10-31 1967-01-26
JPS636709B2 (en) * 1982-12-29 1988-02-10 Shimizu Construction Co Ltd
JPH0210623B2 (en) * 1983-06-30 1990-03-08 Nippon Electric Co
JPH0398210A (en) * 1989-09-08 1991-04-23 Totoku Electric Co Ltd Complex metal plating wire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009283986A (en) * 2009-09-03 2009-12-03 Taiyo Yuden Co Ltd Electronic component with externally connected electrode, and circuit module
CN104995698A (en) * 2013-02-13 2015-10-21 株式会社村田制作所 Electronic component
JPWO2014125895A1 (en) * 2013-02-13 2017-02-02 株式会社村田製作所 Electronic components

Similar Documents

Publication Publication Date Title
US11894195B2 (en) Electronic component
JP6000314B2 (en) Chip electronic component and manufacturing method thereof
JP3395764B2 (en) Chip type common mode choke coil
CN108933025A (en) Winding type coil component
KR20080032607A (en) Inductance device, filter device comprising the same, and noise filter comprising the same
JP7132745B2 (en) surface mount inductor
JPH0556841B2 (en)
CN110676032A (en) Coil component
JP4840921B2 (en) Inductance element
CA1274590A (en) Passive electric component
CN110660568B (en) Coil component
JP2019161196A (en) Coil component
JP2008098307A (en) Inductance element
JPH05326273A (en) Coil part
US5153549A (en) Coil inductor with metal film on wire
JP4004782B2 (en) Winding resistor and manufacturing method thereof
JP5288819B2 (en) AC power cable with noise filter
JPH0510339Y2 (en)
JP2011049418A (en) Common mode noise filter
JPH0346488Y2 (en)
JP3476887B2 (en) Method of forming coil component and electrode
US20230123939A1 (en) Coil component
KR860001867Y1 (en) Mini inductor
JPH05326267A (en) Surface mount electric part
SU1191954A1 (en) Dry core transformer

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees