JPH0640458B2 - Switching contacts for low power and its manufacturing method - Google Patents
Switching contacts for low power and its manufacturing methodInfo
- Publication number
- JPH0640458B2 JPH0640458B2 JP59130683A JP13068384A JPH0640458B2 JP H0640458 B2 JPH0640458 B2 JP H0640458B2 JP 59130683 A JP59130683 A JP 59130683A JP 13068384 A JP13068384 A JP 13068384A JP H0640458 B2 JPH0640458 B2 JP H0640458B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- carbon fibers
- manufacturing
- carbon fiber
- metal
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/027—Composite material containing carbon particles or fibres
Landscapes
- Contacts (AREA)
- Manufacture Of Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は弱電用接点に関し、特に最小電流の接続を長期
間にわたり安定して行なうことができる新規な開閉接点
とその製造法に関するものである。Description: TECHNICAL FIELD The present invention relates to a low-voltage contact, and more particularly to a novel switching contact that enables stable connection of a minimum current over a long period of time and a method for manufacturing the same. .
従来、各種電子機器のスイッチ等に用いられる電気接続
部には貴金属からなる接点が使用され、特に集積回路半
導体(IC)への信号伝達に用いられるスイッチでは、
微弱電流のON−OFFを数十乃至数千万回にわたって
正確に動作することが要求されるため、Au又はAu合
金接点が用いられている。微弱電流の電気接続部には表
面の稀薄な腐食被膜でも電気接触抵抗を顕著に高めるた
め、貴金属の中で最も安定なAuが用いられ、Agでは
硫化し易く、PbやPt族金属では塩化物を発生する傾
向があり、特に稀薄有機蒸気と触媒的に反応して絶縁性
有機ポリマーを析出し易いため、不適当な場合が多い。Conventionally, a contact made of a noble metal is used for an electrical connection portion used in a switch of various electronic devices, and particularly in a switch used for signal transmission to an integrated circuit semiconductor (IC),
Au or Au alloy contacts are used because it is required to accurately operate ON / OFF of a weak current several tens to several tens of millions of times. The most stable Au among the noble metals is used for the electrical connection part of the weak current because the electrical contact resistance is remarkably increased even with a dilute corrosion film on the surface. Is likely to occur, and in particular, it is often unsuitable because it tends to catalytically react with a dilute organic vapor to precipitate an insulating organic polymer.
Au接点においても有機ポリマーなどの析出の可能性が
あり、また大気汚染ガス、例えばSO2とNH3から
(NH4)2SO4が析出することが知られている。ま
たAuは高価な貴金属であり、これを経済的に使用する
ため、Cu等の基材に可及的に局在化した小さいAu接
点を形成することが望まれているが、局在化すると基材
の腐食物、例えばCu2S等がAu表面にクリープして
絶縁被膜を迅速に生成するところからAu接点の局材化
には限界がある。またAu接点の局材化は単位面積当り
の接点荷重を増大し、これが接点部の疲労や変形の原因
となるため、長寿命のスイッチ等には不都合なものであ
った。It is known that an organic polymer or the like may be deposited also at the Au contact, and that (NH 4 ) 2 SO 4 is deposited from the air pollutant gas, for example, SO 2 and NH 3 . Further, since Au is an expensive precious metal and it is economically used, it is desired to form a small Au contact which is localized as much as possible on the base material such as Cu. There is a limit to the localization of Au contacts because the corrosive material of the base material, such as Cu 2 S, creeps on the Au surface and rapidly forms an insulating coating. Further, the localization of the Au contact increases the contact load per unit area, which causes fatigue and deformation of the contact portion, which is inconvenient for a long-life switch or the like.
本発明はこれに鑑み種々研究・実線の結果、微弱電流用
として広範囲の環境、使用条件において長期間にわたり
電気接続を安定して行なうことができる新規な弱電用開
閉接点とその製造法を開発したものである。In view of this, as a result of various studies and solid lines, the present invention has developed a new weak-electrical switching contact that enables stable electrical connection for a long time in a wide range of environments and usage conditions for weak currents, and a manufacturing method thereof. It is a thing.
即ち本発明接点は金属からなる電気接点面に、多数のカ
ーボンファイバーを突設したことを特徴とするものであ
り、本発明製造法はカーボンファイバーの少なくとも一
部を一方に配向して金属を複合し、該複合材をカーボン
ファイバーの配向方向と直角に切断し、該切断面をエッ
チングして多数のカーボンファイバーを突出させること
を特徴とするものである。That is, the contact of the present invention is characterized in that a large number of carbon fibers are projected on an electric contact surface made of a metal, and the production method of the present invention is such that at least a part of the carbon fibers is oriented to one side to form a composite metal. Then, the composite material is cut at a right angle to the orientation direction of the carbon fibers, and the cut surface is etched to project a large number of carbon fibers.
本発明の弱電用開閉接点は上記の如く金属からなる電気
接点面に、多数のカーボンファイバーを例えば1〜10μ
程度の高さに突設したもので、カーボンファイバーの少
なくとも一部を一方向に配向した金属との複合材をカー
ボンファイバーの配向方向と直角に切断し、該切断面を
エッチングしてカーボンファイバーを突出させることに
より造られる。複合材はカーボンファイバーに金属を被
覆し、これを少なくとも一部を一方向に配向してポット
プレスにより一体化するか、又はカーボンファイバーの
少なくとも一部を一方向に配向し、これに溶融金属を圧
入含浸して一体化することにより造られる。カーボンフ
ァイバーの配向は一部が一方向に配列され、残りはこれ
と二次元方向や三次元方向、或いはランダムに配列して
もよい。またこの複合材の切断面をエッチングしてカー
ボンファイバーを突出させるには化学薬液を用いる。こ
の薬液としてはカーボンファイバーと複合した金属によ
り任意に選定する。The switching contact for weak electric current of the present invention has a large number of carbon fibers, for example, 1 to 10 μm on the electric contact surface made of metal as described above.
It is projected at a certain height, and at least a part of the carbon fiber is cut into a composite material with a metal oriented in one direction at right angles to the orientation direction of the carbon fiber, and the cut surface is etched to form the carbon fiber. It is made by protruding. The composite material coats the carbon fiber with a metal and orients at least a part of the carbon fiber in one direction and integrates it by pot press, or orients at least a part of the carbon fiber in one direction, and melts it with a molten metal. It is made by press-fitting, impregnation and integration. The carbon fibers may be partially arranged in one direction, and the rest may be arranged in a two-dimensional direction, a three-dimensional direction, or randomly. Further, a chemical solution is used to etch the cut surface of the composite material to project the carbon fiber. This chemical solution is arbitrarily selected by a metal compounded with carbon fiber.
カーボンファイバーと複合する金属としては、貴金属を
用いることが望ましいが、Cu、Ni、A、Sn又は
これ等の合金も用いることもできる。このような卑金属
を用いた場合には、切断後のエッチングに続いて該エッ
チング面にAu、Ag、Pbなどの貴金属を電気メッキ
や蒸着等により被覆することが望ましく、特にAuが不
可欠の微弱電流用においては、エッチング後にAuを所
望厚さまで被覆することが望ましい。As the metal compounded with the carbon fiber, it is desirable to use a noble metal, but Cu, Ni, A, Sn, or an alloy thereof can also be used. When such a base metal is used, it is desirable to coat the etched surface with a noble metal such as Au, Ag, or Pb by electroplating, vapor deposition, or the like, following the etching after cutting. In use, it is desirable to coat Au to the desired thickness after etching.
電気接点面に突設したカーボンファイバーは相手側接点
表面上に発生した被膜を破壊して電気接触抵抗を低い値
に保持し、更にカーボンファイバー自体が導電体として
作用すると共に、電気接点の機械的強度や耐摩耗性の向
上にも寄与する。即ちカーボンファイバーは直径約1〜
20μの炭素繊維であり、PAN系、ピッチ系などの製法
にもよるが、引張強度200〜300kg/mm2、弾性率10〜100
×103kg/mm2の特性を有し、通常の接点金属やその表面
被膜よりも強度が大きく、上記の作用を有効に発揮す
る。The carbon fibers protruding from the electrical contact surface destroy the coating film generated on the contact surface of the other side and maintain the electrical contact resistance at a low value. Furthermore, the carbon fiber itself acts as a conductor and the mechanical properties of the electrical contact It also contributes to the improvement of strength and wear resistance. That is, carbon fiber has a diameter of about 1
20μ carbon fiber, depending on the manufacturing method such as PAN type and pitch type, tensile strength 200-300kg / mm 2 , elastic modulus 10-100
It has a characteristic of × 10 3 kg / mm 2 , has a higher strength than ordinary contact metals and their surface coatings, and effectively exhibits the above-mentioned effects.
PAN系高弾性方カーボンファイバー(平均線径7.5
μ)にCuを4μの厚さにメッキし、これを一方向に配
列してH2雰囲気中、1000℃で30分間ホットプレスし、
外径約10mmの複合材を製造した。これを厚さ5mmに輪切
りにし、切断面の一方をテープ絶縁して、他方の切断面
をH2SO4 100g/浴中、5A/dm2の電流密度に
より電解エッチングし、厚さ約3μを溶出させてカーボ
ンファイバーを突出させた。次にカーボンファイバー突
出面に、日本エンゲルハード社製Auメッキ液E−77を
用い、電流密度、1.0A/dm2で厚さ1.25μのAuメッキ
を施した。PAN-based highly elastic carbon fiber (average wire diameter 7.5
Cu) to a thickness of 4μ, and this is arranged in one direction and hot pressed at 1000 ° C. for 30 minutes in an H 2 atmosphere.
A composite material with an outer diameter of about 10 mm was manufactured. This was sliced into 5 mm thickness, one of the cut surfaces was insulated with tape, and the other cut surface was electrolytically etched at a current density of 5 A / dm 2 in 100 g of H 2 SO 4 / bath to give a thickness of about 3 μm. It was made to elute and the carbon fiber was made to protrude. Next, the carbon fiber protruding surface was subjected to Au plating with a current density of 1.0 A / dm 2 and a thickness of 1.25 μ using Au plating solution E-77 manufactured by Nippon Engelhard.
相手側接点に先端を半径10mmの曲面としたCu棒を用
い、その表面に下記条件で厚さ1.5μのNiメッキを施
し、その上にAu又はAgを1.25μの厚さにメッキし
た。A Cu rod having a curved tip with a radius of 10 mm was used as the mating contact, the surface of which was plated with Ni having a thickness of 1.5 μ under the following conditions, and Au or Ag was plated with a thickness of 1.25 μ on the Ni plating.
Auメッキ E−77(日本エンゲルハード社製 Auメッキ液) 電流密度 2.5Adm2 前記両接点について、長期実用環境での劣化状況を加速
的に試験するため、下記の稀薄混合ガス試験槽内に100
時間保持した後、本発明接点上に相手側接点を25gの荷
重で押当て、10mAの直流電流を通電して接触抵抗を測定
した。これ等の結果を従来のCu板上に厚さ1.25μのA
uメッキやAメッキを施した接点の場合と比較して第
1表に示す。 Au plating E-77 (Au plating solution manufactured by Nippon Engelhard) Current density 2.5 Adm 2 In order to accelerate the deterioration condition of the both contacts in a long-term practical environment, 100% in the diluted mixed gas test tank below.
After holding for a period of time, the mating contact was pressed against the contact of the present invention with a load of 25 g, and a direct current of 10 mA was applied to measure the contact resistance. These results are shown on a conventional Cu plate with a thickness of 1.25 μA.
The results are shown in Table 1 in comparison with the case where the contacts are plated with u or A.
C2 20ppm NO2 200ppm H2S 100ppm 湿度 75% 温度 30℃ 第1表から明らかなように、従来接点NO.3,4では何れも
接触抵抗が高い値となり、使用中の劣化が著しいことが
判る。これに対し本発明接点NO.1,2では、何れも接触抵
抗が低い値にとどまり、使用中ほとんど劣化しないこと
が判る。C 2 20ppm NO 2 200ppm H 2 S 100ppm Humidity 75% Temperature 30 ℃ As is clear from Table 1, the contact resistances of the conventional contact NOs. 3 and 4 both have high values, and it is clear that deterioration during use is remarkable. On the other hand, it can be seen that in the contacts NO. 1 and 2 of the present invention, the contact resistance remained at a low value and did not deteriorate during use.
以上本発明接点を、固定側の接点として用いた場合を想
定した実験であるが、実際には本発明接点の小片を、基
板やばね材にろう付け等により固定されて用いられるこ
とが多く、固定接点は勿論、可動接点として使用するこ
とができる。The above is an experiment assuming the case of using the contact of the present invention as a contact on the fixed side, but in reality, a small piece of the contact of the present invention is often used by being fixed to a substrate or a spring material by brazing or the like, It can be used as a movable contact as well as a fixed contact.
このように本発明によれば、各種電子機器の弱電用開閉
接点として、長期間安定した特性を維持することができ
るもので、近年のエレクトロニクスの要求に応じること
ができる顕著な効果を奏するものである。As described above, according to the present invention, it is possible to maintain stable characteristics for a long period of time as a low-voltage switching contact of various electronic devices, and to exert a remarkable effect of being able to meet the recent demands of electronics. is there.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−74274(JP,A) 特公 昭49−12947(JP,B1) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-74274 (JP, A) JP-B-49-12947 (JP, B1)
Claims (4)
ンファイバーを突設したことを特徴とする弱電用開閉接
点。1. A switching contact for weak electricity, characterized in that a large number of carbon fibers are projected on a surface of an electric contact made of metal.
特許請求の範囲第1項記載の弱電用開閉接点。2. The switching contact for weak electric current according to claim 1, wherein at least the electric contact surface is formed of a noble metal.
方向に配向して金属を複合し、該複合材をカーボンファ
イバーの配向方向と直角に切断し、該切断面をエッチン
グして多数のカーボンファイバーを突出させることを特
徴とする弱電用開閉接点の製造法。3. A carbon composite is prepared by orienting at least a part of carbon fibers in one direction, cutting the composite material at a right angle to the orientation direction of the carbon fibers, and etching the cut surfaces to obtain a large number of carbon fibers. A method of manufacturing a switching contact for weak electric current, which is characterized by protruding.
ッチング面に貴金属を被覆する特許請求の範囲第3項記
載の弱電用開閉接点の製造法。4. The method for producing a weak electric switching contact according to claim 3, wherein the noble metal is coated on the etching surface from which a large number of carbon fibers are projected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59130683A JPH0640458B2 (en) | 1984-06-25 | 1984-06-25 | Switching contacts for low power and its manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59130683A JPH0640458B2 (en) | 1984-06-25 | 1984-06-25 | Switching contacts for low power and its manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6110815A JPS6110815A (en) | 1986-01-18 |
JPH0640458B2 true JPH0640458B2 (en) | 1994-05-25 |
Family
ID=15040115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59130683A Expired - Lifetime JPH0640458B2 (en) | 1984-06-25 | 1984-06-25 | Switching contacts for low power and its manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0640458B2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912947A (en) * | 1972-05-18 | 1974-02-04 | ||
JPS6010410B2 (en) * | 1976-12-15 | 1985-03-16 | 松下電工株式会社 | Composite plated contacts |
-
1984
- 1984-06-25 JP JP59130683A patent/JPH0640458B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6110815A (en) | 1986-01-18 |
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