| 摘要 |
PROBLEM TO BE SOLVED: To provide an electroless palladium plating liquid where, in a three layer plating film terminal of an electroless nickel plating film/ an electroless palladium plating film/a substitution gold plating film, a gold film is formed only by easily treatable substitution gold plating, and, even when electroless nickel-phosphorous having high flexibility is used, which has excellent joining strength in both of wire bonding joining and solder ball joining, and has excellent running properties as well. SOLUTION: The electroless palladium plating liquid at least comprises: a component (a): a palladium salt organic complex; a component (b): sulfide group-containing monocarboxylic acid or the salt thereof; and a component (c): hypophosphorous acid or the salt thereof. COPYRIGHT: (C)2007,JPO&INPIT |
