JPS5874002A - Resistance circuit board for variable resistor - Google Patents
Resistance circuit board for variable resistorInfo
- Publication number
- JPS5874002A JPS5874002A JP17427581A JP17427581A JPS5874002A JP S5874002 A JPS5874002 A JP S5874002A JP 17427581 A JP17427581 A JP 17427581A JP 17427581 A JP17427581 A JP 17427581A JP S5874002 A JPS5874002 A JP S5874002A
- Authority
- JP
- Japan
- Prior art keywords
- variable resistor
- circuit board
- resistance circuit
- resistive film
- migration
- 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
Landscapes
- Adjustable Resistors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は可変抵抗器の抵抗回路板に関するものであり、
その目的とするところは絶縁板上に設けた抵抗膜の引出
し電極の信頼性を高めることのできる可変抵抗器の抵抗
回路を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resistance circuit board for a variable resistor,
The purpose is to provide a resistance circuit for a variable resistor that can improve the reliability of the lead electrode of a resistance film provided on an insulating plate.
一般に可変抵抗器の抵抗回路板は第１図に示すように紙
基材フェノール樹脂積層板よシなる絶縁板１上に抵抗膜
２を設け、その抵抗膜２０両端部に上記抵抗膜２の幅と
同等の幅で銀ペイントによる引出し電極３を設けていた
。しかしながら、上述した抵抗回路板では引出し電極３
がよシ高電位となる箇所においてより低電位の方向に上
記絶縁板１の菖維に沿って引出し電極３としての銀ペイ
ントの銀が移行したり、電食を引き起す問題があった。In general, the resistance circuit board of a variable resistor is provided with a resistance film 2 on an insulating plate 1 such as a paper-based phenolic resin laminate, as shown in FIG. An extraction electrode 3 made of silver paint was provided with a width equivalent to that of the electrode. However, in the above-described resistor circuit board, the extraction electrode 3
There is a problem in that silver in the silver paint used as the extraction electrode 3 migrates along the irises of the insulating plate 1 in the direction of a lower potential at a location where the potential is higher, causing electrolytic corrosion.
具体的には抵抗膜２の両端部における引出し電極３部分
の間隔が小さいため、その引出し電極３は上記抵抗膜２
のわずかな厚さの側壁に沿ってブリッジされてしまう傾
向があシ、やがては引出し電極３の腐食、抵抗膜２の抵
抗値の増大、絶縁板１の絶縁不良等を゛引きおこし、可
変抵抗器本来の機能を消失させてしまうという問題があ
った。Specifically, since the interval between the extraction electrode 3 portions at both ends of the resistive film 2 is small, the extraction electrode 3 is connected to the resistive film 2.
There is a tendency for bridging to occur along the slightly thick side wall of the variable resistor. There was a problem in that the original function of the vessel was lost.
一方、上述した問題を解消するために第２図に示すよう
に抵抗膜２の両端部にその抵抗膜２０幅よシ狭い幅で銀
ペイントによる引出し電極４を設ける試みがなされてい
るが、この場合には抵抗膜２に比べて引出し電極４の印
刷幅が狭いため、抵抗膜２との境界接触抵抗が増大し、
電流搬送容量。On the other hand, in order to solve the above-mentioned problem, an attempt has been made to provide lead electrodes 4 made of silver paint at both ends of the resistive film 2 with a width narrower than the width of the resistive film 20, as shown in FIG. In this case, since the printed width of the extraction electrode 4 is narrower than that of the resistive film 2, the boundary contact resistance with the resistive film 2 increases,
Current carrying capacity.
インピーダンスが増大して可変抵抗器本体の機能低下を
招く問題があり、また、抵抗膜２０両端縁部が残存する
ように引出し電極４の印刷を行なわなければならない関
係で引出し電極４の印刷がむずかしくなるという問題が
あった。There is a problem that the impedance increases, leading to a decline in the function of the variable resistor body.Also, printing of the extraction electrode 4 is difficult because the extraction electrode 4 must be printed so that both edges of the resistive film 20 remain. There was a problem.
本発明はこのような従来の欠点を解消するものであシ、
絶縁板上に銀、金等の貴金属導体粉の移行抑止作用を有
するマイグレイジョンバイア層を抵抗膜のアンダーコー
トとして設けることにより、引出し電極の信頼性を高め
るようにしたものである。The present invention solves these conventional drawbacks, and
The reliability of the extraction electrode is improved by providing a migration via layer on the insulating plate as an undercoat of the resistive film, which has the effect of inhibiting migration of noble metal conductor powder such as silver or gold.
以下、本発明の実施例について説明する。第３図、第４
図は本発明の一実施例を示し、図中、１１は紙基材フェ
ノール樹脂積層板よりなる絶縁板、１２はその絶縁板上
に設けた銀の移行抑止作用を有するマイグレイジョンバ
リア層、１３はそのマイグレイジョンバリア層１２上に
設けた抵抗膜、１４は上記抵抗膜１３の両端部のそれぞ
れに設けた銀ペイントによる引出し電極、１５は上記抵
抗膜１２の抵抗値を引出すための端子穴、１６は上記絶
縁板１１の′止め具である。Examples of the present invention will be described below. Figures 3 and 4
The figure shows one embodiment of the present invention, in which 11 is an insulating plate made of a paper-based phenolic resin laminate, 12 is a migration barrier layer provided on the insulating plate and having a silver migration inhibiting effect; 13 is a resistive film provided on the migration barrier layer 12, 14 is an extraction electrode made of silver paint provided on each end of the resistive film 13, and 15 is a terminal for extracting the resistance value of the resistive film 12. The hole 16 is a stopper for the insulating plate 11.
ここで、上記マイグレイジョンバリア層１２としての樹
脂材料は、ポリイミド樹脂、ビスマレイミドトリアジン
樹脂、芳香族アミン系硬化剤や酸無水物系硬化剤を使用
したエポキシ樹脂、高級アミン系イレヒビツタを添加し
たエポキシ、メラミン、フェノール等の樹脂が使用でき
る。Here, the resin material for the migration barrier layer 12 is a polyimide resin, a bismaleimide triazine resin, an epoxy resin using an aromatic amine hardening agent or an acid anhydride hardening agent, and a high-grade amine-based permanent ivy added. Resins such as epoxy, melamine, and phenol can be used.
以上のように本発明の可変抵抗器の抵抗回路板は、絶縁
板上に銀の移行抑止作用を有するマイグレイジョンバリ
ア層を設け、このマイグレイジョンバリア層上に抵抗膜
を設け、この抵抗器の端部に銀ペイントによる引出し電
極を設けたので、引出し電極としての銀ペイントの銀の
マイグレイジョンが絶縁板上に設けたマイグレイジョン
バリア層にて抑止することができ、もって、引出し電極
を抵抗膜の幅に影響されることなく抵抗膜上に印刷する
ことができ、その印刷をしやすくすることができる。し
かも、引出し電極は抵抗膜の幅と同等かそれよシ幅広く
形成してもマイグレイジョンバリア層のためにマイグレ
イジョンを抑止し得るために抵抗膜との境□界接触抵抗
の増大を招くこと（がなく、可変抵抗器自体の機能低下
を少なくするこ：とができる利点を有するものである。As described above, in the resistance circuit board of the variable resistor of the present invention, a migration barrier layer having a silver migration inhibiting effect is provided on an insulating plate, a resistance film is provided on this migration barrier layer, and this resistance circuit board is provided with a migration barrier layer having an effect of inhibiting silver migration. Since the extraction electrode made of silver paint is provided at the end of the container, the migration of silver from the silver paint as the extraction electrode can be suppressed by the migration barrier layer provided on the insulating plate. Electrodes can be printed on the resistive film without being affected by the width of the resistive film, making printing easier. Furthermore, even if the extraction electrode is formed to be as wide as or wider than the resistive film, the migration barrier layer can prevent migration, resulting in an increase in the boundary contact resistance with the resistive film. This has the advantage of reducing the functional deterioration of the variable resistor itself.
第１図および第２図は従来の可変抵抗器の抵抗回路板の
平面図、第３図は本発明の可変抵抗器の抵抗回路板の一
実施例を示す平面図、第４図はその人−ム線断面図であ
る。
１１・・・・・・絶縁板、１２・・・・・・マイグレイ
ジョンバリア層、１３・・・・・・抵抗膜、１４・・・
・・・引出し電極。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図1 and 2 are plan views of the resistance circuit board of a conventional variable resistor, FIG. 3 is a plan view showing an embodiment of the resistance circuit board of the variable resistor of the present invention, and FIG. 4 is a plan view of the resistance circuit board of the variable resistor of the present invention. - It is a cross-sectional view along the line. 11...Insulating plate, 12...Migration barrier layer, 13...Resistive film, 14...
...Extraction electrode. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2
Claims (1)
レイジョンバリア層を設け、このマイグレイジョンバリ
ア層上に抵抗膜を設け、その抵抗器の端部に貴金属導体
粉−樹脂系ペイントによって引出し電極を設けてなる可
変抵抗器の抵抗回路板。A migration barrier layer that inhibits migration of noble metal conductor powder is provided on the insulating plate, a resistive film is provided on this migration barrier layer, and the ends of the resistor are drawn out using noble metal conductor powder-resin paint. A resistance circuit board for a variable resistor equipped with electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17427581A JPS5874002A (en) | 1981-10-29 | 1981-10-29 | Resistance circuit board for variable resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17427581A JPS5874002A (en) | 1981-10-29 | 1981-10-29 | Resistance circuit board for variable resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5874002A true JPS5874002A (en) | 1983-05-04 |
Family
ID=15975804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17427581A Pending JPS5874002A (en) | 1981-10-29 | 1981-10-29 | Resistance circuit board for variable resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5874002A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5535843A (en) * | 1978-09-04 | 1980-03-13 | Fujitsu Ltd | Heat pipe |
-
1981
- 1981-10-29 JP JP17427581A patent/JPS5874002A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5535843A (en) * | 1978-09-04 | 1980-03-13 | Fujitsu Ltd | Heat pipe |
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