| 摘要 |
PROBLEM TO BE SOLVED: To provide a gold alloy wire which has improved reliability of junction performance, when it is held in a high temperature environment for a long time, and further has superior performances in sphericity of alloy balls, vibration breakage rate and IC chip crackings. SOLUTION: One to less than 1,000 wt.ppm of at least one of Co and Zn, one to less than 1,000 wt.ppm and one to less than 400 wt.ppm of at least one of La, Y, Ga, Be, Ca and Eu are contained in high purity gold. Or, one to less than 1,000 wt.ppm of Co is contained in high purity gold. |
