ELECTRICAL CONTACT ELEMENT AND A METHOD OF PRODUCING THE SAME
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United States of America Patent
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app pub date -
Sep 25, 2008
filing date -
Oct 1, 2007
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Abandoned
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Abstract
The present invention relates to a method of producing a electrical contact element, in which a multilayer structure is formed by applying a diffusion barrier layer to a base material and at least one metallic layer made of a metal to the diffusion barrier layer, at least one layer formed of tin being applied as the metallic layer. The present invention further relates to an electrical contact element with an electrically conductive base material and a coating which is formed on at least one portion of the electrically conductive base material, the coating having a diffusion barrier layer formed on the base material and the outer layer containing tin. To prevent whisker formation when using the electrical connector element, the present invention proposes, as a solution to the method-related problem, to subject the multilayer structure to a heat treatment such that at least one element of the layer located under the outer layer of the multilayer structure diffuses into said outer layer and the heat-treated outer layer comprises tin. To solve the device-related problem of the invention, it is proposed that the outer layer of the coating be a layer thoroughly alloyed by the diffusion of tin and at least one further metallic element.
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