| 摘要 |
PROBLEM TO BE SOLVED: To provide a method improving the solderability of the surface of a metal. SOLUTION: The surface of a metal is processed by immersion silver plating solution. The solution contains a) soluble source of silver ion, b) acid, c) aliphatic amine, aliphatic amide, quaternary salt, amphoteric salt, resin shape amine. resin shape amide, fatty acid, resin shape acid, ethoxyl conversion substance of an arbitrary one out of the above substances, propoxyl conversion substance of an arbitrary one out of the above substances and additives selected from a group consisting of the mixture of arbitrary ones out of the above substances. |
