EP1421651A2 - Contact electrique - Google Patents

Contact electrique

Info

Publication number
EP1421651A2
EP1421651A2 EP02794538A EP02794538A EP1421651A2 EP 1421651 A2 EP1421651 A2 EP 1421651A2 EP 02794538 A EP02794538 A EP 02794538A EP 02794538 A EP02794538 A EP 02794538A EP 1421651 A2 EP1421651 A2 EP 1421651A2
Authority
EP
European Patent Office
Prior art keywords
electrical contact
contact layer
contact
din
layer
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.)
Granted
Application number
EP02794538A
Other languages
German (de)
English (en)
Other versions
EP1421651B1 (fr
Inventor
Joachim Ganz
Isabell Buresch
Franz Kaspar
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.)
Wieland Werke AG
Doduco Contacts and Refining GmbH
Original Assignee
AMI Doduco GmbH
Wieland Werke AG
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 AMI Doduco GmbH, Wieland Werke AG filed Critical AMI Doduco GmbH
Publication of EP1421651A2 publication Critical patent/EP1421651A2/fr
Application granted granted Critical
Publication of EP1421651B1 publication Critical patent/EP1421651B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials

Definitions

  • the invention relates to an electrical contact with the features specified in the preamble of claim 1.
  • Such electrical contacts are used as plug contacts, for example in connectors for automobiles and in telecommunications technology.
  • the known electrical contacts for this purpose consist of a base body made of a copper-based alloy, which provides the required electrical conductivity and spring properties, and of a hard gold layer electroplated onto the base body, which is gold with less than 1 wt. -% cobalt is involved. It is also known to provide a silver layer as a contact layer instead of a hard gold layer on the base body.
  • the gold-cobalt contact layers previously used are not suitable for the increased temperature requirements because cobalt segregates from the alloy above 150 ° C. The result is that the cobalt can then oxidize and increase the contact resistance. Hot-tinned contacts can also no longer be used at 200 ° C because you are already close to the melting point of the tin at 232 ° C and the tin softens and creeps. The accelerated diffusion of Sn in Cu and vice versa quickly leads to the formation of intermetallic phases, which oxidize and lead to high contact resistance. With Ag coatings, irreversible softening takes place from approx. 160 ° C.
  • the object of the present invention is to find a contact structure which is particularly suitable and at the same time inexpensive for the tougher requirements (200 ° C. ambient temperature and 42 V voltage), which is particularly suitable for plug contacts in automobiles and in telecommunications technology.
  • the electrical contact according to the invention has a basic body made of a copper-based alloy, an at least 0.3 ⁇ m thick contact layer made of gold with 0.5% by weight to 15% by weight of one or more platinum metals, with the exception of palladium, which expediently possibly only up to 8 % By weight is contained in the contact layer, and between the base body and the contact layer an intermediate layer made of silver or of a silver-based alloy or of nickel.
  • the metals "ruthenium, rhodium, palladium, osmium, iridium and platinum” are combined under the name "platinum metals".
  • a silver-based alloy is understood to mean an alloy consisting predominantly of silver.
  • the contact layer ensures a sufficiently low contact resistance and sufficient wear resistance, in particular abrasion resistance, as well as sufficient security against welding together! contacts. Even with a thickness of the contact layer of not more than 5 ⁇ m, the desired low contact resistance can be achieved over a period of 3,000 hours at 200 ° C if an intermediate layer made of silver or a silver-based alloy, e.g. silver with a few, is provided between the base body and the contact layer Percent of an additive dissolved in it, such as nickel or palladium, e.g. fine-grain silver AgNi0.15. This intermediate layer prevents base components from diffusing out of the base body onto the contact surface and oxidizing there. Pure silver is particularly suitable for the intermediate layer.
  • Nickel as an intermediate layer can also diffuse base components from the base body to the contact surface prevent, but is only suitable for the present purpose if a special ductility is not important, because nickel is so brittle that cracks can occur at the small bending radii that typically occur when forming plug contacts.
  • Silver is more ductile and should preferably contain such alloy components in such small quantities that the ductility required for the intended use of the plug contacts is retained, as is the effectiveness as a diffusion barrier layer. Silver also has the advantage that it can be applied inexpensively in layers up to a few 10 ⁇ m thick.
  • the thickness of the intermediate layer is preferably 0.2 ⁇ m to 15 ⁇ m, most preferably approximately 1 ⁇ m to 2 ⁇ m.
  • an intermediate layer made of silver proves its worth, on the one hand because it prevents base components from diffusing into the contact layer from the base body, and on the other hand because it can compensate for material losses in the contact layer as a sacrificial layer.
  • the contact layer is expediently no thicker than 10 ⁇ m.
  • a contact layer that is thicker than 10 ⁇ m does not bring any technical improvement, preferably the contact layer is not thicker than 5 ⁇ m.
  • platinum metal which is alloyed with gold
  • platinum itself is particularly suitable.
  • gold-platinum and gold-palladium show a very good resistance to oxidation and show sufficient ductility in the stressed composition in order to avoid them
  • Platinum Being able to deform damage to the contact layer. Platinum has the advantage over palladium of being cheaper. The cost-effectiveness is an important criterion, which must be considered in particular for mass parts for the automotive industry and for communication technology. Gold platinum stands out it also has a special corrosion resistance and a lower tendency than gold-palladium to catalytically form organic cover layers.
  • the contact layer should consist of gold with 0.5% to 15% by weight of one or more platinum metals. Below a content of 0.5% by weight, the tendency towards cold welding is too great. Above 15% by weight, the contact layer becomes too brittle and cannot subsequently be deformed to form plug contacts without risking the contact layer tearing.
  • the gold-based alloy for the contact layer could contain platinum metals other than platinum and palladium, in particular in combination with platinum or palladium, e.g. ruthenium; however, this has no further significant advantages.
  • the gold-based alloy could also contain silver in addition to a platinum metal.
  • the intermediate layer is preferably between 1 ⁇ m and 15 ⁇ m thick. Below 1 ⁇ m, the diffusion-inhibiting effect of the intermediate layer is so small that the thickness of the contact layer would have to be increased to compensate, which is uneconomical. On the other hand, increasing the thickness of the intermediate layer beyond 15 ⁇ m would be technically unnecessary and therefore uneconomical. An intermediate layer made of silver with a thickness of approx. 1 ⁇ m to 2 ⁇ m is considered optimal. Electrical plug contacts according to the invention are usually produced from strip-shaped semi-finished products by stamping, bending and embossing processes.
  • the intermediate layer made of silver or made of a silver-based alloy or of nickel and the contact layer made of the gold-based alloy is applied.
  • the intermediate layer and the contact layer are preferably tracked down! For the intended thin layer thicknesses, especially for the contact layer, this is considered the most economical and also leads to sufficiently dense and ductile layers without foreign inclusions.
  • the intermediate layer and the contact layer can advantageously even be deposited successively in a single coating pass. Electrolytic deposition is also an option, in particular for the intermediate layer.
  • the material from which the intermediate layer is made is preferably applied not only to the front of the base base body, on which the contact layer is also arranged, but also to the back of the base body. Especially at the high temperatures at which contacts according to the invention are to be used, this has the advantage that the contact resistance rises less over time than without coating the back of the base body.
  • a band-shaped base body made of copper was coated on one side with 2 ⁇ m silver and then with 1 ⁇ m AuPt2.5.
  • the contact resistance was initially measured at 2m ⁇ . After 3000 hours of aging in air at 200 ° C, the contact resistance rose to values between 1 ⁇ and 10 ⁇ . However, the back of the copper tape was also included
  • the contact resistance only increased by a few m ⁇ under the same aging conditions.
  • the side surfaces of the basic body formed by stamping were free of silver with this good result. This leads to the further advantage that it is possible without disadvantage for the contact resistance is to first coat band-shaped or plate-shaped basic bodies and then to separate them by punching.
  • CuFeP The material with the designation C194 according to ASTM
  • CuNiSn The material with the designation C72500 according to ASTM
  • CuSnZn The material with the designation C425 according to ASTM
  • the invention is suitable not only for plug contacts, but also for switching contacts.
  • the attached single figure shows a cross section through a band-shaped semi-finished product for an electrical plug contact according to the invention with a basic body 1 made of a copper-based alloy, for example CuCrSiTi (X), with an intermediate layer 2 made of silver in a thickness between 0.2 ⁇ m to 15 ⁇ m and with a Contact layer 3, which is 0.5 microns to 2 microns thick and consists of gold with 1 wt .-% to 5 wt .-% platinum.
  • the intermediate layer 2 is only on the front side 4 of the base body.
  • the material from which the intermediate layer 2 is made, or another material suitable as a diffusion barrier, can also advantageously be applied to the rear side 5.

Landscapes

  • Contacts (AREA)
  • Laminated Bodies (AREA)
  • Saccharide Compounds (AREA)
EP02794538A 2001-08-03 2002-08-02 Contact electrique Expired - Lifetime EP1421651B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10138204A DE10138204B4 (de) 2001-08-03 2001-08-03 Elektrischer Kontakt
DE10138204 2001-08-03
PCT/EP2002/008603 WO2003015217A2 (fr) 2001-08-03 2002-08-02 Contact electrique

Publications (2)

Publication Number Publication Date
EP1421651A2 true EP1421651A2 (fr) 2004-05-26
EP1421651B1 EP1421651B1 (fr) 2006-11-15

Family

ID=7694325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02794538A Expired - Lifetime EP1421651B1 (fr) 2001-08-03 2002-08-02 Contact electrique

Country Status (10)

Country Link
US (1) US7015406B2 (fr)
EP (1) EP1421651B1 (fr)
JP (1) JP4636453B2 (fr)
KR (1) KR20040043170A (fr)
CN (1) CN100511852C (fr)
AT (1) ATE345586T1 (fr)
DE (2) DE10138204B4 (fr)
ES (1) ES2275942T3 (fr)
PT (1) PT1421651E (fr)
WO (1) WO2003015217A2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1457743B1 (fr) * 2003-03-12 2013-12-25 Behr France Rouffach SAS Réchauffeur électrique, spécialement pour une voiture
DE10318890B4 (de) * 2003-04-17 2014-05-08 Ami Doduco Gmbh Elektrische Steckkontakte und ein Halbzeug für deren Herstellung
DE102004045947A1 (de) * 2004-06-30 2006-01-19 Osram Opto Semiconductors Gmbh Leuchtdiodenanordnung
DE102007001525A1 (de) * 2007-01-10 2008-07-17 Gustav Klauke Gmbh Kabelschuh
US8896075B2 (en) * 2008-01-23 2014-11-25 Ev Products, Inc. Semiconductor radiation detector with thin film platinum alloyed electrode
US8637165B2 (en) 2011-09-30 2014-01-28 Apple Inc. Connector with multi-layer Ni underplated contacts
DE112013003649T5 (de) * 2012-07-25 2015-04-16 Tyco Electronics Amp Gmbh Steckkontaktverbindung
US9004960B2 (en) * 2012-08-10 2015-04-14 Apple Inc. Connector with gold-palladium plated contacts
DE102012109057B3 (de) * 2012-09-26 2013-11-07 Harting Kgaa Verfahren zur Herstellung eines elektrischen Kontaktelements und elektrisches Kontaktelement
US9312621B2 (en) 2013-05-15 2016-04-12 Hon Hai Precision Industry Co., Ltd. Coaxial connector having a static terminal and a movable terminal
CN104183939A (zh) * 2013-05-27 2014-12-03 富士康(昆山)电脑接插件有限公司 射频连接器
US9472361B1 (en) * 2014-10-07 2016-10-18 Es Beta, Inc. Circuit board contacts used to implement switch contacts of keypads and keyboards
JP6743998B1 (ja) * 2019-01-24 2020-08-19 三菱マテリアル株式会社 コネクタ用端子材及びコネクタ用端子
KR20220046552A (ko) * 2019-08-09 2022-04-14 미쓰비시 마테리알 가부시키가이샤 커넥터용 단자재
CN112958940B (zh) * 2021-03-23 2022-06-28 贵研铂业股份有限公司 银基/铜基/金基钎料焊膏、制备方法及焊接工艺

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL92647C (fr) * 1954-03-02
DE2940772C2 (de) * 1979-10-08 1982-09-09 W.C. Heraeus Gmbh, 6450 Hanau Elektrischer Schwachstromkontakt
GB2130795B (en) * 1982-11-17 1986-07-16 Standard Telephones Cables Ltd Electrical contacts
DE3715171A1 (de) 1986-05-12 1987-11-19 Feinmetall Gmbh Federkontaktstift
JPH02189823A (ja) * 1989-01-13 1990-07-25 Matsushita Electric Works Ltd 電気接点
DE4013627A1 (de) * 1990-04-27 1991-10-31 Siemens Ag Kontaktelement fuer elektrische schaltkontakte
US5139890A (en) * 1991-09-30 1992-08-18 Olin Corporation Silver-coated electrical components
JPH0674970A (ja) 1992-08-25 1994-03-18 Takata Kk 加速度センサ
JPH07305127A (ja) * 1994-05-11 1995-11-21 Tanaka Kikinzoku Kogyo Kk 電気接点材料
DE19607138A1 (de) * 1995-02-28 1996-08-29 Whitaker Corp Elektrischer Kontakt für hohe Temperaturen
DE19617138A1 (de) 1996-04-29 1997-11-06 Henkel Kgaa Kationische Schichtverbindungen, deren Herstellung und deren Verwendung als Stabilisatoren für halogenhaltige Kunststoffe
JPH09330629A (ja) * 1996-06-07 1997-12-22 Furukawa Electric Co Ltd:The 電気接点材料、及びその製造方法、及び前記電気接点材料を用いた操作スイッチ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03015217A2 *

Also Published As

Publication number Publication date
CN1559094A (zh) 2004-12-29
DE10138204B4 (de) 2004-04-22
US7015406B2 (en) 2006-03-21
EP1421651B1 (fr) 2006-11-15
ATE345586T1 (de) 2006-12-15
US20040238338A1 (en) 2004-12-02
KR20040043170A (ko) 2004-05-22
WO2003015217A3 (fr) 2004-03-25
ES2275942T3 (es) 2007-06-16
JP2004538369A (ja) 2004-12-24
PT1421651E (pt) 2007-02-28
DE50208722D1 (de) 2006-12-28
DE10138204A1 (de) 2003-02-27
WO2003015217A2 (fr) 2003-02-20
CN100511852C (zh) 2009-07-08
JP4636453B2 (ja) 2011-02-23

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