| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an electric contact that can stably reduce inductive reactance, for example, in high-frequency signal transmission.SOLUTION: A nickel-phosphorous alloy plating film 12 is formed on the surface of a base material 11 comprising a metal material by an electroplating method. In the film formation, a phosphorus content in the film is set in the range of 10-18 mass%. A surface layer plating film 13 comprising, for example, a noble metal-based or soldering metal material-based plating film, is formed on the nickel-phosphorous alloy plating film 12. Furthermore, a metal plating coating comprising the nickel-phosphorous alloy plating film 12 and the surface layer plating film 13 is formed on the base material 11, and thereafter subjected to heat treatment at a temperature in the range of 200-270°C. Thus, an electric contact that is thermally stable and has non-magnetic properties is prepared, and excellent high-frequency characteristics can be obtained. |
