Abstract: A method for producing a base plate for an electronic module is where a plate made of a composite material, which contains a metallic component based on aluminum and a non-metallic component, is coated with a solderable layer. The carrier layer and the cover are deposited by means of physical vapour deposition.

Abstract: A bonding substrate is described having a contacting pad made of copper or a copper-based alloy for bonding wire, the contacting pad being covered with a corrosion inhibitor layer containing a nitrogen-containing aliphates as an active substance and a nitrogen-containing heterocyclic aromatics as a further active substance. The corrosion inhibitor layer, without any water content, contains 5% by weight or more of urea derivative or 3% by weight or more of triphenylguanidine or 2% by weight or more of tetrazole derivative or 5% by weight or more of 1-H-benzotriazole or 5% by weight or more of benzimidazole. In addition, an electronic module having such a bonding substrate and a method of protecting from corrosion surfaces made of copper or a copper-base alloy provided for wire bonding are disclosed.

Abstract: The invention discloses a semi-finished product for making plug-in contacts in plug-in connectors for electric DC power systems in motor vehicles which are operated at a nominal voltage at which electric arcing may occur, having an electrically conductive main body made of a non-precious metallic material that carries, at least in part, a contact-making coating of a material more precious than the material of the main body. It is provided according to the invention that the coating has thickness of at least 0.3 ?m and consists of silver or of a silver-based alloy with an addition that will not form an alloy with silver or with the silver-based alloy, or will at best form a precipitation alloy, and which has a higher melting point than silver.

Abstract: The invention discloses a semi-finished product for making plug-in contacts in plug-in connectors for electric DC power systems in motor vehicles which are operated at a nominal voltage at which electric arcing may occur, having an electrically conductive main body made of a non-precious metallic material that carries, at least in part, a contact-making coating of a material more precious than the material of the main body. It is provided according to the invention that the coating has thickness of at least 0.3 ?m and consists of silver or of a silver-based alloy with an addition that will not form an alloy with silver or with the silver-based alloy, or will at best form a precipitation alloy, and which has a higher melting point than silver.

Abstract: An electric contact comprises a main body consisting of a copper-based alloy or of stainless steel and a contact layer consisting of a gold-based alloy. The contact layer has a thickness of at least 0.3 ?m and consists of gold with a content of 0.5 percent by weight to 15 percent by weight of one or more platinum group metals, and that an intermediate layer consisting of silver or of a silver-based alloy or of nickel is provided between the main body and the contact layer. The contact layer is preferably applied on the main body by a PVD process.

Abstract: The invention describes an electric contact comprising a main body consisting of a copper-based alloy or of stainless steel and a contact layer consisting of a gold-based alloy.

Abstract: The electrode consists of a metal carrier (1) and a surface layer (3), which has been deposited on the carrier and has a thickness of 0.1 to 20 .mu.m and consists of a material which differs from the carrier material and distinguishes from the carrier material by having a smaller work function and lower thermal and electrical conductivities and is selected from the group tungsten, niobium, tantalum, rhenium and chromium. The carrier (1) consists of a deeply drawable material. There is preferably also an interlayer (2) made of a highly conductive metal.