| 摘要 |
PROBLEM TO BE SOLVED: To provide solder capable of significantly improving joint strength.SOLUTION: Lead-free solder includes 1.0-5.0 wt% Bi, 1.0-5.0 wt% Sb, and the balance comprising mainly Sn, where the total sum of contents of Bi and Sb is 3.0 wt% or more. |
