| 摘要 |
PROBLEM TO BE SOLVED: To provide an electroless plating pretreatment liquid capable of being stably used for a long term even within a wide range of pH, and an electroless plating method using the pretreatment liquid.SOLUTION: A coating film for a plating object is formed by using a neutral sol solution composed of a tetravalent tin compound, an aqueous solution of palladium complex, and an aqueous solution of silver complex, solely or in a mixed solution. After this, a reduction treatment is performed to perform a surface activation and an electroless plating. The solution to be used herein can be stably used for one month or longer even in a neutral region.SELECTED DRAWING: None |
