EP0604710B1 - Corps de contact électrique - Google Patents

Corps de contact électrique Download PDF

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Publication number
EP0604710B1
EP0604710B1 EP93114377A EP93114377A EP0604710B1 EP 0604710 B1 EP0604710 B1 EP 0604710B1 EP 93114377 A EP93114377 A EP 93114377A EP 93114377 A EP93114377 A EP 93114377A EP 0604710 B1 EP0604710 B1 EP 0604710B1
Authority
EP
European Patent Office
Prior art keywords
layer
contact
palladium
contact element
gold
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
Application number
EP93114377A
Other languages
German (de)
English (en)
Other versions
EP0604710A1 (fr
Inventor
Günter Dr. Herklotz
Bernd Gehlert
Thomas Frey
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of EP0604710A1 publication Critical patent/EP0604710A1/fr
Application granted granted Critical
Publication of EP0604710B1 publication Critical patent/EP0604710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H1/023—Composite material having a noble metal as the basic material
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H2011/046—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by plating

Definitions

  • the invention relates to an electrical contact body with a layer sequence, which is a base material, a contact layer and a thin, galvanically deposited, gold-containing surface layer includes.
  • Such contact bodies are used, for example, in communications engineering and in data processing used. In electrical connectors, they are used, for example, as contact blades and contact spring formed. They are characterized by the lowest possible and constant contact resistance over a longer service life.
  • Very widespread contact bodies are based on a base material, such as brass, a Have contact layer made of palladium or palladium-nickel, on which a surface layer made of hard gold or soft gold.
  • Such contact bodies are for example from the publication by E. J. Kudrak et al. in "Plating and Surface Finishing", February 1992, pages 49-54.
  • the gold ones Surface layers called "flash" usually have a thickness of less than 0.5 ⁇ m.
  • a generic electrical contact body is also known from DE 25 40 944 A1.
  • EP 0 410 472 A2 describes an electrical contact consisting of several layers, whose contact layer is preferably coated with a thin gold layer, but which has no influence on the durability of the contact.
  • the contact layer exists made of precious metal and covers a base layer made of copper, for example applied and specially designed nickel layer.
  • the gold-containing surface layer has different from contact bodies with contact surfaces Materials, in particular from alloys containing palladium, with regard to their Resistance to tarnishing as well as maintaining a constant contact resistance and proven to have the highest possible wear resistance.
  • the gold-bearing Surface especially in applications with a large number of electrical contact surfaces, a considerable cost factor. Because of the manufacturing and dissolving of the electrical Contacts acting on the contact body, in particular on the surface layers mechanical loads is a minimum thickness in the known contact bodies the surface layer is required. A minimum thickness of approx. 0.2 ⁇ m is usually used adhered to.
  • the present invention has for its object to provide a contact body in comparison to the generic contact bodies mentioned above, a better frictional wear resistance having.
  • an electrical contact body with a Layer sequence which is a base material, a contact layer made of palladium, a palladium-nickel alloy or a silver-tin alloy, a thickness in the range between 0.05 microns and 0.5 ⁇ m palladium alloy support layer different from the material forming the contact layer, and a thin, galvanically deposited, gold-containing Surface view includes.
  • the layer sequence of the support layer and surface layer is subsequently referred to as a "double flash" designated.
  • Electrical contact bodies with such a double flash have a good one Corrosion and wear resistance behavior. It has been shown that contact bodies with Double flash compared to generic contact bodies has a significantly higher resistance to frictional wear to have. This surprising effect may be due to the fact that the support layer is provided with a smooth and relatively hard surface on which the gold-containing Surface layer is relatively mobile. So the surface layer can have forces like them For example, when making and detaching the contacts, give in without it Damage to the shift is coming. The formation of the contact body with a double flash allows therefore a reduction in the layer thickness of the gold-containing surface layer without one To accept deterioration of the corrosion resistance.
  • the contact body according to the invention through the use of cheaper compared to gold Precious metals silver and palladium cheap to produce.
  • the Possibility of using a compared to that used in the known contact bodies Layer thicknesses thinner gold-containing surface layer also with regard to the Wear resistance of the gold-containing surface layer itself has proven to be an advantage. This one too Effect may be due to the fact that a thinner gold-containing surface layer in the Compared to a thicker, it is able to evade the forces acting on it more easily and less particles are rubbed off by it (tongue formation), which in turn becomes one accelerated fretting can contribute.
  • the electrical contact body according to the invention has a support layer, the thickness of which in Range is between 0.05 ⁇ m and 0.5 ⁇ m.
  • a support layer the thickness of which in Range is between 0.05 ⁇ m and 0.5 ⁇ m.
  • Support layers that are galvanically deposited have proven particularly useful. This are not only characterized by high homogeneity, high density and a resultant good corrosion and frictional wear resistance, but also by comparison, for example for sputtered layers simpler and cheaper production.
  • contact bodies preferred, in which the support layer has a thickness of less than 0.2 microns and the Surface layer and the support layer together a thickness in the range between 0.1 microns and 1 ⁇ m, preferably less than 0.5 ⁇ m.
  • the layer thickness of the gold-containing surface layer preferably set to values between 0.05 ⁇ m and 0.2 ⁇ m.
  • An embodiment of the electrical contact body has proven to be particularly wear-resistant with a support layer made of a palladium-silver alloy.
  • a support layer made of a palladium-silver alloy.
  • Such support layers are characterized by their hardness and smoothness.
  • Palladium-silver alloys are preferred, where the silver content is in the range between 20 and 70% by weight and the palladium content is in the range between 30 and 80% by weight.
  • Such precious metal alloys have high corrosion resistance and good wear behavior. Your manufacture is possible by means of galvanic procedures. With regard to good tribological and chemical A support layer becomes properties with the lowest possible precious metal content preferred, which consists of an alloy of 50 wt .-% silver, balance palladium.
  • contact bodies in which the support layer is made have also proven suitable a palladium-nickel alloy with a nickel content in the range between 5 and 60 % By weight or of a palladium-tin alloy with a tin content in the range between 5 and 60% by weight.
  • the contact body has a contact layer made of palladium, a palladium-nickel alloy or a silver-tin alloy on.
  • a contact layer made of palladium, a palladium-nickel alloy or a silver-tin alloy on.
  • the contact layer and the support layer advantageously adjoin one another, but in order to be able to take advantage of the advantages of the double flash is that the materials that make up the contact layer and the support layer are from each other are different.
  • FIG. 1 shows a layer sequence of a generic electrical contact body
  • FIG. 2 shows a layer sequence of an electrical contact body according to the invention
  • FIG. 3 results of measurements of the frictional wear in a contact body with a layer sequence, as shown in FIG. 1, and
  • FIG. 4 results of measurements of frictional wear in a contact body with a layer sequence, as shown in FIG. 2.
  • reference number 1 is assigned to the base material.
  • the base material 1 which is made of brass, is easy to solder and weld Intermediate layer 2 made of nickel.
  • the intermediate layer 2 which has a thickness of 1.5 ⁇ m, the actual contact layer 3 is applied. It exists in the exemplary embodiment made of palladium and has a thickness of 1 ⁇ m.
  • the contact body 2 differs from that of FIG. 1 by the coating the contact layer 3 in the form of a double flash 5 instead of the surface layer 4 (FIG. 1).
  • the layer 6 of the double flash 5 facing the contact layer 3 is a galvanically deposited PdAg layer 6 with a content of palladium and silver of each 50% by weight.
  • the PdAg layer 6 has a thickness of 0.1 ⁇ m.
  • the thickness of the double flash 5 is thus a total of 0.2 ⁇ m.
  • the coefficient of friction measured as a function of the friction cycles carried out is a measure of which when establishing or releasing an electrical connection, for example a plug connection, occurring friction. It results from the ratio of those when manufacturing or dissolving the plug-in connection to be plug-in or pulling forces and the contact force with which the two contact layers are pressed against each other. A constant low coefficient of friction indicates low friction wear.
  • the contact bodies are those which are shown in FIGS. 3 and 4 Lead measurement results, differ in that in the known from the prior art Contact body ( Figure 1) the surface layer of a 0.2 micron thick gold layer consists of a double flash in the contact body according to the invention ( Figure 2) consists of a 0.1 ⁇ m thick PdAg layer and a 0.1 ⁇ m thick gold layer.
  • Figure 1 the surface layer of a 0.2 micron thick gold layer consists of a double flash in the contact body according to the invention
  • Figure 2 consists of a 0.1 ⁇ m thick PdAg layer and a 0.1 ⁇ m thick gold layer.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)

Claims (10)

  1. Corps de contact électrique muni d'une succession de couches qui comprend un matériau de base (1), une couche de contact (3) en palladium, en un alliage de palladium-nickel ou en un alliage d'argent-étain, une couche d'appui (6) présentant une épaisseur comprise entre 0,05 µm et 0,5 µm en un alliage de palladium, qui est différent du matériau formant la couche de contact (3), et une couche superficielle à teneur en or, mince, déposée galvaniquement (7).
  2. Corps de contact selon la revendication 1, caractérisé en ce que la couche d'appui (6) est déposée galvaniquement.
  3. Corps de contact selon la revendication 1 ou 2, caractérisé en ce que la couche d'appui (6) présente une épaisseur inférieure à 0,2 µm.
  4. Corps de contact selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la couche superficielle (7) et la couche d'appui (6) présentent conjointement une épaisseur comprise entre 0,1 µm et 1 µm, de préférence inférieure à 0,5 µm.
  5. Corps de contact selon l'une quelconque des revendications 1 a 4, caractérisé en ce que la couche d'appui (6) se compose d'un alliage de palladium-argent.
  6. Corps de contact selon la revendication 5, caractérisé en ce que la teneur en argent de la couche d'appui (6) est comprise entre 20 et 70% en poids et la teneur en palladium entre 30 et 80% en poids.
  7. Corps de contact selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la couche d'appui (6) se compose d'un alliage de palladium-nickel avec une proportion de nickel comprise entre 5 et 60% en poids.
  8. Corps de contact selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la couche d'appui (6) se compose d'un alliage de palladium-étain avec une proportion de étain comprise entre 5 et 60% en poids.
  9. Corps de contact selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'entre le matériau de base (1) et la couche de contact (3) est disposée une couche intermédiaire (2).
  10. Corps de contact selon la revendication 9, caractérisé en ce que la couche intermédiaire (2) est en nickel.
EP93114377A 1992-12-22 1993-09-08 Corps de contact électrique Expired - Lifetime EP0604710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243570A DE4243570C1 (de) 1992-12-22 1992-12-22 Elektrischer Kontaktkörper
DE4243570 1992-12-22

Publications (2)

Publication Number Publication Date
EP0604710A1 EP0604710A1 (fr) 1994-07-06
EP0604710B1 true EP0604710B1 (fr) 1999-03-10

Family

ID=6476186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114377A Expired - Lifetime EP0604710B1 (fr) 1992-12-22 1993-09-08 Corps de contact électrique

Country Status (6)

Country Link
US (1) US5438175A (fr)
EP (1) EP0604710B1 (fr)
JP (1) JP2504918B2 (fr)
AU (1) AU671164B2 (fr)
CA (1) CA2107696C (fr)
DE (2) DE4243570C1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431847C5 (de) * 1994-09-07 2011-01-27 Atotech Deutschland Gmbh Substrat mit bondfähiger Beschichtung
DE19617488C2 (de) * 1996-05-02 2002-03-07 Gustav Krueger Kontaktelement für lösbare elektrische Verbindungen
US5852581A (en) * 1996-06-13 1998-12-22 Micron Technology, Inc. Method of stress testing memory integrated circuits
JPH117857A (ja) * 1997-06-17 1999-01-12 Denso Corp メンブレンスイッチ
US6233185B1 (en) 1997-08-21 2001-05-15 Micron Technology, Inc. Wafer level burn-in of memory integrated circuits
DE19914587C2 (de) * 1999-03-31 2001-05-03 Orga Kartensysteme Gmbh Chipkarte
DE10008484C2 (de) * 2000-02-24 2003-07-17 Ccr Gmbh Beschichtungstechnolo Kühlbare Hochfrequenz-Luftspule
US20020185716A1 (en) * 2001-05-11 2002-12-12 Abys Joseph Anthony Metal article coated with multilayer finish inhibiting whisker growth
KR20110008078A (ko) * 2008-04-14 2011-01-25 헴로크세미컨덕터코포레이션 재료를 증착하기 위한 제조 장치와 이에 사용하기 위한 전극
AU2009236679B2 (en) * 2008-04-14 2014-02-27 Hemlock Semiconductor Corporation Manufacturing apparatus for depositing a material and an electrode for use therein
CA2721194A1 (fr) * 2008-04-14 2009-10-22 Hemlock Semiconductor Corporation Appareil de fabrication destine a deposer un materiau sur une electrode destinee a etre utilisee dans ledit appareil
CN104205508B (zh) * 2012-03-21 2017-08-29 恩普乐股份有限公司 电触头和电气部件用插座
US9512529B2 (en) 2013-06-04 2016-12-06 Rohm And Haas Electronic Materials Llc Electroplating baths of silver and tin alloys
US20180053714A1 (en) * 2016-08-18 2018-02-22 Rohm And Haas Electronic Materials Llc Multi-layer electrical contact element
DE102017002150A1 (de) * 2017-03-06 2018-09-06 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Elektrisches Kontaktelement

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671702A (en) * 1971-03-15 1972-06-20 Stromberg Carlson Corp An electrical contact structure for a switch reed comprising gold and palladium layers
DE2540943B2 (de) * 1975-09-13 1978-02-02 W.C. Heraeus Gmbh, 6450 Hanau Kontaktkoerper fuer einen elektrischen steckkontakt
DE2540944C3 (de) * 1975-09-13 1978-10-12 W.C. Heraeus Gmbh, 6450 Hanau Kontaktkörper für einen elektrischen Steckkontakt
DE2604291C3 (de) * 1976-02-04 1981-08-20 Siemens AG, 1000 Berlin und 8000 München Werkstoffanordnung für elektrische Schwachstromkontakte
DE2839671A1 (de) * 1978-09-12 1980-03-13 Josef Dipl Ing Koza Verfahren zur herstellung von kontakten fuer die elektrotechnik
US4328286A (en) * 1979-04-26 1982-05-04 The International Nickel Co., Inc. Electrodeposited palladium, method of preparation and electrical contact made thereby
JPS55154013A (en) * 1979-05-18 1980-12-01 Matsushita Electric Works Ltd Multilayer contact
DE3312713A1 (de) * 1983-04-08 1984-10-11 The Furukawa Electric Co., Ltd., Tokio/Tokyo Silberbeschichtete elektrische materialien und verfahren zu ihrer herstellung
US4628165A (en) * 1985-09-11 1986-12-09 Learonal, Inc. Electrical contacts and methods of making contacts by electrodeposition
DE3765696D1 (de) * 1986-05-26 1990-11-29 Siemens Ag Kontaktelement fuer elektrische schaltkontakte.
JPH01260721A (ja) * 1988-04-08 1989-10-18 Fujitsu Ltd 電気接点
JPH0359972A (ja) * 1989-07-27 1991-03-14 Yazaki Corp 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

Also Published As

Publication number Publication date
AU671164B2 (en) 1996-08-15
JP2504918B2 (ja) 1996-06-05
EP0604710A1 (fr) 1994-07-06
CA2107696A1 (fr) 1994-06-23
DE59309427D1 (de) 1999-04-15
JPH06223664A (ja) 1994-08-12
AU5257593A (en) 1994-07-07
CA2107696C (fr) 1997-01-14
DE4243570C1 (de) 1994-01-27
US5438175A (en) 1995-08-01

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