摘要:
To provide a solder-plating film which has good solder wettability and with which discoloration and twisting of the tin film after heat treatment are prevented. A method and a solution for surface treating a tin film are disclosed. The aqueous solution contains specific compounds and is brought into contact with a tin-plating film before reflow treatment of the tin film.
摘要:
A hard gold plating solution and plating method which provides a gold plating solution with high deposition selectivity using a gold plating solution containing gold cyanide, cobalt salt, and hexamethylenetetramine.