| abstract |
(57) Abstract: A silicon-based polymer compound layer, a nickel-phosphorus alloy layer and a gold layer are sequentially formed on a silica surface, and the phosphorus content in the nickel-phosphorus alloy layer is Gold-plated silica characterized by being different from the surface layer. [Effects] According to the present invention, by a cheap and simple process, Silica-silicon polymer compound with nickel plating with strong adhesion-nickel / phosphorus alloy-gold 4 Gold-plated silica having a layer structure can be obtained. This gold-plated silica has excellent conductivity and high conductivity stability, and has wide application as a raw material for connectors and the like. |