| 摘要 |
PROBLEM TO BE SOLVED: To provide a pre-treatment liquid to a noble metal capable of depositing an excellent electroless nickel coating film only on a noble metal portion by a simple treatment method when depositing the electroless nickel coating film on a noble metal such as gold. SOLUTION: A noble metal surface activation liquid for the electroless nickel plating is composed of of aqueous solution containing (i) a complexing agent, (ii) at least one component selected from a group composed of copper salt and silver salt, and (iii) aldehydes. In the electroless nickel plating method on the noble metal, the surface of the noble metal is activated by using the activation liquid, a catalyst for the electroless plating is provided, and then, the electroless nickel plating is performed. COPYRIGHT: (C)2007,JPO&INPIT
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