发明授权
US09381595B2 Pb-free solder and electronic component built-in module 有权
无铅焊料和电子元器件内置模块

Pb-free solder and electronic component built-in module
摘要:
A Pb-free solder includes a first metal including at least Sn and Bi, and a second metal including at least an Ni—Fe alloy. In the first metal, the sum of Sn and Bi is 90 mass % or more, and a ratio of Bi is 5 to 15 mass %. A ratio of the second metal to the sum of mass of the first metal and mass of the second metal is 5 to 30 mass %.
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