Patent ID: 11858071
Assignee: SENJU METAL INDUSTRY CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A solder alloy having an alloy composition consisting of, by mass %:
Ag: 2.5 to 3.7%,
Cu: 0.25 to 0.95%,
Bi: 3.0 to 3.9%, and
In: 0.5 to 2.3%, with the balance being Sn,
wherein the alloy composition satisfies the following relations (1) to (3):

8.1≤Ag+2Cu+Bi+In ≤11.5  Relation (1)

1.30≤(Bi+In)/Ag≤1.66  Relation (2)

4.48≤Ag×Cu×Bi×In≤7.7  Relation (3)

wherein Ag, Cu, Bi, and In in the relations (1) to (3) each represent the contents (mass %) thereof in the alloy composition.