| 摘要 |
PROBLEM TO BE SOLVED: To provide a low cost tin-copper alloy plating liquid which can form a plating film having a satisfactory gloss, and reduces discoloration in the plating film after a reflow treatment. SOLUTION: The tin-copper alloy plating liquid is composed of an aqueous solution comprising stannous sulfate, copper sulfate, sulfuric acid, chloride, an aromatic carbonyl compound and a surfactant as effective components. COPYRIGHT: (C)2006,JPO&NCIPI
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