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Current Topics in the Surface Chemistry of Electric Contacts

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1 Author(s)
Antler, M. ; Burndy Corp.,Norwalk,Conn

This paper describes recent work in the science of the separable electronic pressure contact with emphasis on chemical factors in performance. The following topics are discussed: growth and morphology of sulfide tarnish films which creep across the interface between gold plate and silver or copper alloys and degrade contact performance; the formation and structure of corrosion solids on porous gold electroplated contacts, and which originate in atmospheres polluted with sulfur dioxide or hygroscopic dusts; new developments in measuring the porosity in precious metal plates; the critical dependence of the porosity of gold plate on substrate roughness; and new concepts for developing electronic connectors with contacts made of base metals.

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Parts, Materials and Packaging, IEEE Transactions on  (Volume:PMP-2 ,  Issue: 3 )