| 摘要 |
PROBLEM TO BE SOLVED: To provide a dummy ball for barrel plating, which little contaminates a bath and solves environmental problems on Pb, and which is used for an external electrode formed on the surface of electronic components by electrolytic plating. SOLUTION: The dummy ball for barrel plating comprises metals including Sn as a main component and no Pb, and has Vickers hardness preferably of 13 Hv or higher, more preferably of 17 Hv or higher.
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