| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that a plated noble-metal film for an electrical contact or a plated Ni film to be used as the underlayer lowers a contact performance or the adhesiveness of the plated film when having a large amount of a brightener deposited on the surface of the plated film, though the films are required to be dense and have superior corrosion resistance. Ž<P>SOLUTION: This production method includes reducing the amount of the brightener contained in the plated noble-metal film of Au and Ag of the electrical contact and the plated Ni film to be used as the underlayer of the films, in the surface of the film, compared to the inner part of the film. Thereby obtained plated film has the surface superior in the contact performance or the adhesiveness of the plated film, though being dense because of containing crystal grains with small grain sizes in the inner part, which constitute the plated film. The plated film containing different amounts of the brightener in the plated film is produced by controlling the current density on the surface of the substrate, for instance, by changing a distance between the anode and a substrate, through tilting the anode or curving the anode to change the shape. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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