SOLDER ALLOY AND METHOD FOR FE-LEACHING PREVENTION

摘要

To provide a method for preventing Fe erosion of soldering equipment member coated with Fe and Fe-based alloy in the case of using a soldering member coated with the Fe and Fe-based alloy and subjecting the same to soldering with a lead-free solder alloy of an Sn-Ag-Cu system composed of Sn as a principal component. The solder alloy of an alloy composition composed of ≥ 0.3 to ≤ 4.0 mass% Ag, ≥ 0.1 to ≤ 1.0 mass% Cu, ≥ 0.01 to ≤ 0.5 mass% Co, and if necessary ≥ 0.01 to ≤ 0.1 mass% Ni, and balance substantially Sn is used.