| 摘要 |
PROBLEM TO BE SOLVED: To provide an electroless gold plating soln. forming a gold plating film extremely excellent in adhesion between the substitution gold plating film to be formed and a base metal film selected from the groups of nickel, cobalt, palladium and alloys contg. these metals and to provide a method of executing electroless gold plating treatment by using it. SOLUTION: As essential components, this soln. contains the following (a) to (c): (a) a water soluble gold compd., (b) a complexing agent which stabilizes gold ions into a plating soln. but substantially does not dissolve nickel, cobalt or palladium and (c) a gold precipitation inhibitor capable of suppressing the partial and excessive etching of the base metal generated at the time of executing gold plating by substitution reaction with the base metal.
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