EP0788124A2 - Elément de contact électrique à couches et procédé de sa fabrication - Google Patents

Elément de contact électrique à couches et procédé de sa fabrication Download PDF

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Publication number
EP0788124A2
EP0788124A2 EP96111280A EP96111280A EP0788124A2 EP 0788124 A2 EP0788124 A2 EP 0788124A2 EP 96111280 A EP96111280 A EP 96111280A EP 96111280 A EP96111280 A EP 96111280A EP 0788124 A2 EP0788124 A2 EP 0788124A2
Authority
EP
European Patent Office
Prior art keywords
layer
contact element
silver
gold
thickness
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.)
Withdrawn
Application number
EP96111280A
Other languages
German (de)
English (en)
Other versions
EP0788124A3 (fr
Inventor
Marc De Vogelaere
Günther Henning
Ursula Michelsen-Mohammadein
Josef Dr. Weiser
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0788124A2 publication Critical patent/EP0788124A2/fr
Publication of EP0788124A3 publication Critical patent/EP0788124A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2938—Coating on discrete and individual rods, strands or filaments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2958—Metal or metal compound in coating

Definitions

  • the invention relates to an electrical layer contact element with a base metal, on which lie successively a first layer consisting of a silver-containing material and a second layer galvanically produced from gold or a gold alloy, the second layer being at least partially diffused into the first layer.
  • the invention also relates to a method for producing such a contact element.
  • EP 160 290 A2 describes a process for producing a contact material in which a contact layer made of silver or a silver alloy or of palladium or a palladium alloy is galvanically coated with a gold layer as corrosion protection and then annealed.
  • the gold layer is relatively thin with a thickness of less than 1 ⁇ m; in addition, the layers there are not sufficiently resistant to erosion for various purposes. As far as palladium is used, the contact costs are also relatively high.
  • the aim of the present invention is to provide a stratified contact for relays or similar switching devices, which has a high erosion resistance and which enables inexpensive and environmentally friendly production and disposal.
  • the first layer is an electroplated silver-metal oxide layer with a proportion of the metal oxide of 2 to 16% by weight and a layer thickness of 20 to 70 ⁇ m.
  • the galvanic production of the silver-metal oxide layer gives it, in contrast to the conventional powder-metallurgically produced silver dispersion layers, a stem structure that gives the contact a high erosion resistance. Due to the known diffusion of the gold alloy into the silver dispersion layer, the material is made low-resistance in depth.
  • the gold alloy layer has a layer thickness of 1 to 3 ⁇ m, preferably of about 2 ⁇ m.
  • a top layer of rhodium or ruthenium is preferably produced on the gold alloy layer, the layer thickness of which is less than 1 ⁇ m, preferably about 0.1 ⁇ m.
  • This cover layer prevents contact sticking when switching low currents.
  • Various metal oxides for example tin oxide, titanium oxide or iron oxide, are suitable as dispersants. In principle, other metals could also be used, for example cadmium oxide, which is less desirable because of its toxicity.
  • An advantageous method for producing the layer contact element according to the invention is that first a base layer of 20 to 70 ⁇ m thick made of silver-metal oxide on a base metal, then a second layer of 1 to 3 ⁇ m thickness of gold or a gold alloy and finally a third layer of less than 1 ⁇ m of rhodium or ruthenium are produced, all layers being galvanically produced, and then the contact layers of a heat treatment at a temperature of 300 to 900 ° C, preferably of 350 ° to 550 ° C, are subjected.
  • the layer structure according to the invention is sketched in the single figure, the ratio of the layer thicknesses in the drawing not entirely corresponding to reality.
  • a silver dispersion layer 2 with a thickness of 20 to 70 ⁇ m is applied galvanically to a carrier 1, which can be a nickel wire of approximately 0.4 mm in width, for example. 2 to 12% by weight of dispersants, e.g. As tin oxide or iron oxide, built in to obtain a burn-resistant layer.
  • a gold alloy layer 3, for example AuAg8, AuCo 0.4 or pure Au, is likewise applied galvanically over the silver dispersion layer; finally, a cover layer 4 made of ruthenium or rhodium is produced using the same method as protection against contact gluing.
  • the entire layer contact is finally subjected to a temperature treatment, as a result of which a part of the gold or gold alloy 3, as indicated by the arrows 5, diffuses into the silver dispersion layer.
  • this dispersion layer becomes low-resistance in depth.
  • the duration of the heat can also be optimized in individual cases, taking the layer thicknesses into account. At temperatures between 300 ° C and 900 ° C, an exposure time of between one minute and five hours is possible, with a shorter exposure time being considered at higher temperatures.
  • this coating is preferably produced on a wire, which represents a contact profile as a semi-finished product.
  • the individual contact pieces are then separated from the wire and welded onto the contact carrier, for example a sheet metal strip made of a copper alloy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Contacts (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Manufacture Of Switches (AREA)
EP96111280A 1995-08-18 1996-07-12 Elément de contact électrique à couches et procédé de sa fabrication Withdrawn EP0788124A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19530512A DE19530512C1 (de) 1995-08-18 1995-08-18 Elektrisches Schichtkontaktelement, Halbzeug für Schichtkontaktelemente und Verfahren zu seiner Herstellung
DE19530512 1995-08-18

Publications (2)

Publication Number Publication Date
EP0788124A2 true EP0788124A2 (fr) 1997-08-06
EP0788124A3 EP0788124A3 (fr) 1997-11-05

Family

ID=7769866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111280A Withdrawn EP0788124A3 (fr) 1995-08-18 1996-07-12 Elément de contact électrique à couches et procédé de sa fabrication

Country Status (4)

Country Link
US (1) US5846655A (fr)
EP (1) EP0788124A3 (fr)
JP (1) JPH09120730A (fr)
DE (1) DE19530512C1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI225322B (en) * 2002-08-22 2004-12-11 Fcm Co Ltd Terminal having ruthenium layer and a connector with the terminal
DE10353497A1 (de) 2003-11-11 2005-06-09 Siemens Ag Schalteinrichtung
DE102004012777B3 (de) * 2004-03-15 2005-11-10 W.C. Heraeus Gmbh Kontaktkörper, insbesondere für Schaltkontakte sowie Kontaktanordnung mit einem derartigen Kontaktkörper sowie seine Verwendung
DE102008056263A1 (de) 2008-11-06 2010-05-27 Ami Doduco Gmbh Verfahren zur Herstellung eines Halbzeugs und Halbzeug für elektrische Kontakte sowie Kontaktstück
DE102008056264A1 (de) 2008-11-06 2010-05-27 Ami Doduco Gmbh Verfahren zur Herstellung eines Halbzeugs und Halbzeug für elektrische Kontakte sowie Kontaktstück
US20150004434A1 (en) * 2013-07-01 2015-01-01 Xtalic Corporation Coated articles and methods comprising a rhodium layer
EP3416825A4 (fr) * 2016-02-16 2019-11-06 Xtalic Corporation Articles comprenant un revêtement sans nickel et procédés associés

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2038929B2 (de) * 1969-08-29 1978-03-16 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Kontakt für eine Schaltvorrichtung der Nachrichtentechnik
US3682814A (en) * 1970-09-25 1972-08-08 Scm Corp Cathodic electrocoating process
GB1457511A (en) * 1973-02-08 1976-12-01 Imp Metal Ind Kynoch Ltd Composite body electrodes for electrolytic processes
JPS5139900B2 (fr) * 1973-10-20 1976-10-30
DE3027304C2 (de) * 1980-07-18 1982-09-30 Sds-Elektro Gmbh, 8024 Deisenhofen Elektrischer Mehrlagenkontakt
DE3203037C2 (de) * 1982-01-29 1984-03-08 Siemens AG, 1000 Berlin und 8000 München Kontaktelement und Verfahren zu dessen Herstellung
DE3416122A1 (de) * 1984-04-30 1985-10-31 Inovan-Stroebe GmbH & Co KG, 7534 Birkenfeld Verfahren zum herstellen eines kontaktwerkstoffes
DE3664833D1 (en) * 1985-12-06 1989-09-07 Siemens Ag Contact element for electrical switch contacts
US4879013A (en) * 1986-03-03 1989-11-07 Ppg Industries, Inc. Method of cationic electrodeposition using dissolution resistant anodes
US4954926A (en) * 1989-07-28 1990-09-04 E. I. Du Pont De Nemours And Company Thick film conductor composition
US5126915A (en) * 1989-07-28 1992-06-30 E. I. Du Pont De Nemours And Company Metal oxide-coated electrically conductive powders and compositions thereof
US5051156A (en) * 1990-01-31 1991-09-24 Intevep, S.A. Electrocatalyst for the oxidation of methane and an electrocatalytic process
GB2248029A (en) * 1990-09-19 1992-03-25 Amicon Ltd Chromatography system.
DE4142857A1 (de) * 1991-12-20 1993-06-24 Siemens Ag Verfahren zum herstellen eines elektrischen kontaktes
DE4317950A1 (de) * 1993-05-28 1994-12-01 Siemens Ag Beschichtetes Metallband als Halbzeug für elektrische Kontaktstücke und Verfahren zum Aufbringen derartiger Kontaktstücke auf einen Träger
DE4343550A1 (de) * 1993-12-20 1995-06-22 Siemens Ag Kontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik

Also Published As

Publication number Publication date
DE19530512C1 (de) 1996-10-17
EP0788124A3 (fr) 1997-11-05
JPH09120730A (ja) 1997-05-06
US5846655A (en) 1998-12-08

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