| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a conventional solder material does not necessarily exhibit a sufficiently high thermal fatigue property in soldering an Au electrode which is subjected to Au flash plating by flash treatment for plating thinly in a short time.SOLUTION: A solder material is utilized in soldering an Au electrode including Ni plating containing P, and contains 3-8 mass% of In, 0.3-4.0 mass% of Ag, and 0.4-0.6 mass% of only one kind of component among Cr, Ni, Fe, Co, Zn, Si, Ge, Ga, and Al, wherein the balance is 87.4 mass% or more of Sn. |
