EP0788124A2 - Layered electrical contact element and method of producing same - Google Patents

Layered electrical contact element and method of producing same 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
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EP
European Patent Office
Prior art keywords
layer
contact element
silver
gold
thickness
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Application number
EP96111280A
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German (de)
French (fr)
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EP0788124A3 (en
Inventor
Marc De Vogelaere
Günther Henning
Ursula Michelsen-Mohammadein
Josef Dr. Weiser
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Siemens AG
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Siemens AG
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Publication of EP0788124A2 publication Critical patent/EP0788124A2/en
Publication of EP0788124A3 publication Critical patent/EP0788124A3/en
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    • 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.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Contacts (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Manufacture Of Switches (AREA)

Abstract

Auf einem Basismetall, vorzugsweise in Form einer Drahtes, werden galvanisch eine erste Schicht (2) aus einem Silber-Metalloxid in einer Dicke von 20 bis 70 µm, danach eine zweite Schicht (3) aus Gold oder einer Goldlegierung in einer Dicke von 1 bis 3 µm und schließlich eine dritte Schicht (4) aus Rhodium oder Ruthenium in einer Schichtdicke von weniger als 1 µm erzeugt. Durch eine Wärmebehandlung bei einer Temperatur zwischen 300° und 900° C wird die Goldlegierung teilweise in die Silber-Metalloxid-Schicht hineindiffundiert.
Auf diese Weise erhält man eine niederohmige und abbrandfeste Kontaktbeschichtung, vorzugsweise für die Anwendung in Schwachstromrelais.

Figure imgaf001
On a base metal, preferably in the form of a wire, a first layer (2) made of a silver metal oxide with a thickness of 20 to 70 μm is galvanically, then a second layer (3) made of gold or a gold alloy with a thickness of 1 to 3 µm and finally a third layer (4) made of rhodium or ruthenium in a layer thickness of less than 1 µm. The gold alloy is partially diffused into the silver-metal oxide layer by heat treatment at a temperature between 300 ° and 900 ° C.
In this way, a low-resistance and erosion-resistant contact coating is obtained, preferably for use in low-current relays.
Figure imgaf001

Description

Die Erfindung betrifft ein elektrisches Schichtkontaktelement mit einem Basismetall, auf dem aufeinanderfolgend eine aus einem silberhaltigen Material bestehende erste Schicht und eine galvanisch aus Gold oder einer Goldlegierung erzeugte zweite Schicht liegen, wobei die zweite Schicht zumindest teilweise in die erste Schicht diffundiert ist. Außerdem betrifft die Erfindung ein Verfahren zur Herstellung eines solchen Kontaktelementes.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.

Grundsätzlich ist eine derartige Schichtfolge von Silberlegierung und Goldlegierung bekannt. Beispielsweise ist in der EP 160 290 A2 ein Verfahren zur Herstellung eines Kontaktwerkstoffes beschrieben, bei dem eine Kontaktschicht aus Silber oder einer Silberlegierung bzw. aus Palladium oder einer Palladiumlegierung galvanisch mit einer Goldschicht als Korrosionsschutz belegt und danach getempert wird. Die Goldschicht ist mit einer Dicke von weniger als 1 µm relativ gering; außerdem sind die dortigen Schichten für verschiedene Anwendungszwecke nicht ausreichend abbrandfest. Soweit Palladium verwendet wird, sind auch die Kosten für den Kontakt relativ hoch.In principle, such a layer sequence of silver alloy and gold alloy is known. For example, 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 µm; 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.

In der DE 43 17 950 A1 ist weiterhin ein Kontaktprofil mit einer Palladiumlegierung und einer darüber liegenden Goldlegierung beschrieben. Auch hierfür gilt, daß reine Palladiumschichten aus Kostengrunden vermieden werden sollten und daß die bekannten Legierungen mit Palladium die gewunschte Abbrandfestigkeit nicht erreichen. Überdies konnte Palladium wegen seiner guten Katalysatoreigenschaften die Polymerisation von Kunststoffdämpfen im Kontaktbereich begünstigen und dadurch die unerwünschte Bildung von Isolationsschichten auf den Kontaktoberflächen fördern ("Brown-Powder"-Effekt).DE 43 17 950 A1 also describes a contact profile with a palladium alloy and a gold alloy lying above it. This also applies to the fact that pure palladium layers should be avoided for reasons of cost and that the known alloys with palladium do not achieve the desired erosion resistance. In addition, due to its good catalyst properties, palladium was able to promote the polymerisation of plastic vapors in the contact area and thereby promote the undesired formation of insulation layers on the contact surfaces ("brown powder" effect).

Ziel der vorliegenden Erfindung ist es, einen Schichtkontakt für Relais oder ähnliche Schaltgeräte zu schaffen, der eine hohe Abbrandfestigkeit aufweist und der eine kostengünstige und umweltfreundliche Herstellung und Entsorgung ermöglicht.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.

Mit einem Schichtkontaktelement der eingangs genannten Art wird dieses Ziel erfindungsgemäß dadurch erreicht, daß die erste Schicht eine galvanisch erzeugte Silber-Metalloxid-Schicht mit einem Anteil des Metalloxids von 2 bis 16 Gew.% und einer Schichtdicke von 20 bis 70 µm ist.With a layer contact element of the type mentioned in the introduction, this aim is achieved in that 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 µm.

Durch die galvanische Herstellung der Silber-Metalloxid-Schicht erhält diese im Unterschied zu den herkömmlichen, pulvermetallurgisch hergestellten Silber-Dispersionsschichten eine Stengelstruktur, die dem Kontakt eine hohe Abbrandfestigkeit verleiht. Durch die an sich bekannte Diffusion der Goldlegierung in die Silber-Dispersionsschicht wird der Werkstoff in die Tiefe niederohmig gemacht.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.

Die Goldlegierungsschicht besitzt in einer vorteilhaften Ausführungsform eine Schichtdicke von 1 bis 3 µm vorzugsweise von etwa 2 µm. Außerdem wird vorzugsweise auf der Goldlegierungsschicht eine Deckschicht aus Rhodium oder Ruthenium erzeugt, deren Schichtdicke weniger als 1 µm vorzugsweise etwa 0,1 µm, beträgt. Mit dieser Deckschicht wird beim Schalten geringer Ströme das Kontaktkleben verhindert. Als Dispersanten kommen verschiedene Metalloxide, beispielsweise Zinnoxid, Titanoxid oder Eisenoxid, in Betracht. Auch andere Metalle konnten grundsätzlich verwendet werden, beispielsweise Cadmiumoxid, das aber wegen seiner Giftigkeit weniger erwünscht ist.In an advantageous embodiment, the gold alloy layer has a layer thickness of 1 to 3 μm, preferably of about 2 μm. In addition, a top layer of rhodium or ruthenium is preferably produced on the gold alloy layer, the layer thickness of which is less than 1 μm, preferably about 0.1 μm. 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.

Ein vorteilhaftes Verfahren zur Herstellung des erfindungsgemäßen Schichtkontaktelementes besteht darin, daß auf ein Basismetall zunächst eine erste Schicht von 20 bis 70 µm Dicke aus Silber-Metalloxid, danach eine zweite Schicht von 1 bis 3 µm Dicke aus Gold oder einer Goldlegierung und schließlich eine dritte Schicht von weniger als 1 µm aus Rhodium oder Ruthenium erzeugt werden, wobei alle Schichten galvanisch hergestellt werden, und daß dann die Kontaktschichten einer Warmebehandlung bei einer Temperatur von 300 bis 900° C, vorzugsweise von 350° bis 550° C, unterzogen werden.An advantageous method for producing the layer contact element according to the invention is that first a base layer of 20 to 70 μm thick made of silver-metal oxide on a base metal, then a second layer of 1 to 3 µm thickness of gold or a gold alloy and finally a third layer of less than 1 µm 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.

In der einzigen Figur ist der erfindungsgemäße Schichtaufbau skizziert, wobei das Verhaltnis der Schichtdicken in der Zeichnung nicht ganz der Wirklichkeit entspricht.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.

Auf einem Träger 1, der beispielsweise ein Nickel-Draht von etwa 0,4 mm Breite sein kann, wird galvanisch eine Silber-Dispersionsschicht 2 von 20 bis 70 µm Dicke aufgebracht. Dabei werden in die Silbermatrix 2 bis 12 Gew.% Dispersanten, z. B. Zinnoxid oder Eisenoxid, eingebaut, um eine abbrandfeste Schicht zu erhalten. Über der Silber-Dispersionsschicht wird eine Gold-Legierungsschicht 3, beispielsweise AuAg8, AuCo 0,4 oder reines Au, ebenfalls galvanisch aufgebracht; darüber wird schließlich mit der gleichen Methode eine Deckschicht 4 aus Ruthenium oder Rhodium als Schutz gegen das Kontaktkleben erzeugt.A silver dispersion layer 2 with a thickness of 20 to 70 μm 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.

Der gesamte Schichtkontakt wird schließlich einer Temperaturbehandlung unterzogen, wodurch ein Teil des Goldes bzw. der Goldlegierung 3, wie mit den Pfeilen 5 angedeutet, in die Silber-Dispersionsschicht diffundiert. Auf diese Weise wird diese Dispersionsschicht in die Tiefe niederohmig. Die Dauer der Wärmeeinwirkung kann im Einzelfall auch unter Berücksichtigung der Schichtdicken optimiert werden. Bei Temperaturen zwischen 300° C und 900° C ist eine Einwirkdauer zwischen einer Minute und fünf Stunden möglich, wobei bei höheren Temperaturen eine kürzere Einwirkdauer in Betracht kommt.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. In this way, 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.

Auf die beschriebene Weise erhält man für Anwendungen in Schwachstromrelais eine reproduzierbare niederohmige, abbrandfeste und gegen das Kaltverschweißen beständige Kontaktbeschichtung. Wie erwähnt, wird diese Beschichtung vorzugsweise auf einem Draht erzeugt, der als Halbzeug ein Kontaktprofil darstellt. Für die einzelnen Relaiskontakte werden dann von dem Draht die einzelnen Kontaktstücke abgetrennt und auf den Kontaktträger, beispielsweise einen Blechstreifen aus einer Kupferlegierung, aufgeschweißt.In the manner described, a reproducible low-resistance, erosion-resistant and cold-welding contact coating is obtained for applications in low-current relays. As mentioned, this coating is preferably produced on a wire, which represents a contact profile as a semi-finished product. For the individual relay contacts, 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.

Claims (8)

Elektrisches Schichtkontaktelement mit einem Basismetall (1), auf dem aufeinanderfolgend eine aus einem silberhaltigen Material bestehende erste Schicht (2) und eine galvanisch aus Gold oder einer Goldlegierung erzeugte zweite Schicht (3) liegen, wobei die zweite Schicht zumindest teilweise in die erste Schicht diffundiert ist, dadurch gekennzeichnet, daß die erste Schicht (2) eine galvanisch erzeugte Silber-Metalloxid-Schicht mit einem Anteil des Metalloxids von 2 bis 12 Gew.% und einer Schichtdicke von 20 bis 70 µm ist.Electrical layer contact element with a base metal (1), on which a first layer (2) consisting of a silver-containing material and a second layer (3) electroplated from gold or a gold alloy successively lie, the second layer at least partially diffusing into the first layer characterized in that the first layer (2) is a galvanically produced silver-metal oxide layer with a proportion of the metal oxide of 2 to 12% by weight and a layer thickness of 20 to 70 µm. Schichtkontaktelement nach Anspruch 1, dadurch gekennzeichnet, daß die zweite, aus Gold oder einer Goldlegierung bestehende Schicht (3) eine Schichtdicke von 1 bis 3 µm vorzugsweise etwa 2 µm, besitzt.Layer contact element according to claim 1, characterized in that the second layer (3) consisting of gold or a gold alloy has a layer thickness of 1 to 3 µm, preferably about 2 µm. Schichtkontaktelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß auf der zweiten Schicht (3) eine Deckschicht (4) aus Rhodium oder Ruthenium mit einer Schichtdicke von weniger als 1 µm, vorzugsweise etwa 0,1 µm, liegt.Layer contact element according to claim 1 or 2, characterized in that on the second layer (3) there is a cover layer (4) made of rhodium or ruthenium with a layer thickness of less than 1 µm, preferably about 0.1 µm. Schichtkontaktelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in der Silbermatrix der ersten Schicht (2) Zinnoxid als Dispersant enthalten ist.Layer contact element according to one of Claims 1 to 3, characterized in that tin oxide is contained as a dispersant in the silver matrix of the first layer (2). Schichtkontaktelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in der Silbermatrix der ersten Schicht (2) Eisenoxid als Dispersant enthalten ist.Layer contact element according to one of Claims 1 to 3, characterized in that iron oxide is contained as a dispersant in the silver matrix of the first layer (2). Schichtkontaktelement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß es in Form eines beschichteten Drahtes (1) als Halbzeug für Schweißkontakte gestaltet ist.Layered contact element according to one of claims 1 to 5, characterized in that it is designed in the form of a coated wire (1) as a semi-finished product for welded contacts. Verfahren zur Herstellung eines Schichtkontaktelementes nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß auf ein Basismetall (1) zunächst eine erste Schicht (2) von 20 bis 70 µm Dicke aus Silber-Metalloxid, danach eine zweite Schicht (3) von 1 bis 3 µm Dicke aus Gold oder einer Goldlegierung und schließlich eine dritte Schicht (4) von weniger als 1 µm Dicke aus Rhodium oder Ruthenium erzeugt werden, wobei alle Schichten galvanisch hergestellt werden, und daß dann die Kontaktschichten einer Wärmebehandlung bei einer Temperatur zwischen 300° und 900° C unterzogen werden.Method for producing a layer contact element according to one of Claims 1 to 6, characterized in that first a first layer (2) of 20 to 70 µm thick made of silver-metal oxide, then a second layer (3) of 1 on a base metal (1) to 3 microns thickness of gold or a gold alloy and finally a third layer (4) of less than 1 micron thickness of rhodium or ruthenium are produced, all layers being galvanically produced, and then the contact layers of a heat treatment at a temperature between 300 ° and subjected to 900 ° C. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Wärmebehandlung bei einer Temperatur zwischen 350° und 550° C erfolgt.A method according to claim 7, characterized in that the heat treatment is carried out at a temperature between 350 ° and 550 ° C.
EP96111280A 1995-08-18 1996-07-12 Layered electrical contact element and method of producing same Withdrawn EP0788124A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19530512A DE19530512C1 (en) 1995-08-18 1995-08-18 Electrical layered contact element used in weak current relays
DE19530512 1995-08-18

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EP0788124A2 true EP0788124A2 (en) 1997-08-06
EP0788124A3 EP0788124A3 (en) 1997-11-05

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EP (1) EP0788124A3 (en)
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* 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 (en) 2003-11-11 2005-06-09 Siemens Ag switching device
DE102004012777B3 (en) 2004-03-15 2005-11-10 W.C. Heraeus Gmbh Contact body, in particular for switching contacts and contact arrangement with such a contact body and its use
DE102008056264A1 (en) 2008-11-06 2010-05-27 Ami Doduco Gmbh Process for producing a semifinished product and semifinished product for electrical contacts and contact piece
DE102008056263A1 (en) 2008-11-06 2010-05-27 Ami Doduco Gmbh Process for producing a semifinished product and semifinished product for electrical contacts and contact piece
US20150004434A1 (en) * 2013-07-01 2015-01-01 Xtalic Corporation Coated articles and methods comprising a rhodium layer
EP3416825A4 (en) * 2016-02-16 2019-11-06 Xtalic Corporation Articles including nickel-free coating and methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160290A2 (en) * 1984-04-30 1985-11-06 INOVAN GmbH & Co. KG Metalle und Bauelemente contact material
EP0549087A1 (en) * 1991-12-20 1993-06-30 Siemens Aktiengesellschaft Electric contact and process for producing an electric contact

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2038929B2 (en) * 1969-08-29 1978-03-16 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Contact for a switching device in communications engineering
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 (en) * 1973-10-20 1976-10-30
DE3027304C2 (en) * 1980-07-18 1982-09-30 Sds-Elektro Gmbh, 8024 Deisenhofen Electrical multilayer contact
DE3203037C2 (en) * 1982-01-29 1984-03-08 Siemens AG, 1000 Berlin und 8000 München Contact element and process for its manufacture
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
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
US4954926A (en) * 1989-07-28 1990-09-04 E. I. Du Pont De Nemours And Company Thick film conductor composition
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.
DE4317950A1 (en) * 1993-05-28 1994-12-01 Siemens Ag Coated metal strip as a semi-finished product for electrical contact pieces and method for applying such contact pieces to a carrier
DE4343550A1 (en) * 1993-12-20 1995-06-22 Siemens Ag Contact material based on silver for use in switching devices of power engineering

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160290A2 (en) * 1984-04-30 1985-11-06 INOVAN GmbH & Co. KG Metalle und Bauelemente contact material
EP0549087A1 (en) * 1991-12-20 1993-06-30 Siemens Aktiengesellschaft Electric contact and process for producing an electric contact

Also Published As

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

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