Patent ID: 10967464

Abstract:
A solder alloy having an alloy composition consisting of, in mass %, Ag: 1% to 4%, Cu: 0.5% to 0.8%, Bi: more than 4.8% and 5.5% or less. Sb: more than 1.5% and 5.5% or less, Ni: 0.01% or more and less than 0.1%, Co: more than 0.001% and 0.1% or less, the balance being Sn. The alloy composition satisfies the following three relationships: 0.020%≤Ni+Co≤0.105%; 9.1%≤Sb+Bi≤10.4%; and 4.05×10−3≤(Ni+Co)/(Bi+Sb)≤1.00×10−2, where Ni, Co, Bi, and Sb each represent a content (mass %) thereof in the solder alloy.