Composite plating method

摘要

Inorganic or organic fine particles which are insoluble to water are added to a metal plating bath, by dispersing the fine particles in a watery medium by the help of an azo-surfactant having an aromatic azo compound residue. Electrolysis is then carried out. According to the present invention, the content of the fine particles present in a composite plating film composed of the fine particles and a metal can be increased.