| abstract |
(57) [Problem] To provide a surface treatment method for wire bonding that can reduce the corrosion and dirt of metal plating and improve the performance of wire bonding. SOLUTION: Prior to performing wire bonding on a surface of metal plating applied to a metal substrate, the surface of the metal plating is treated with at least one of neopentyl fatty acid ester, dibasic acid, and amine salt of dibasic acid. Then, it is treated with a pore-sealing agent prepared by dissolving in at least one kind of solvent among alcohol, chlorine, and fluorine. The use of the sealing agent can prevent corrosion of the metal plating and can also make it difficult for dirt to adhere to the surface of the metal plating. |