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Sn-Zn-Cu-Bi lead free solder is one of promising candidates to replace Sn-Pb eutectic solder because of its low cost, good wettability to Cu, low melt temperature and without toxicity. The microstructure and property of Sn-Zn-Cu-Bi lead free solder has been investigated in this paper. The wettability to Cu substrate of solders with different Bi concent was investigated by spread test. Solder melt...
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