| 摘要 |
A solder ball which suppresses generation of voids in a joint, excels in a thermal fatigue property, and can also obtain a good drop impact resistance property, and an electronic member using the same are provided. The solder ball is formed of a Sn-Bi type alloy containing Sn as a main element, 0.3 to 2.0 mass% of Cu, 0.01 to 0.2 mass% of Ni, and 0.1 to 3.0 mass% of Bi, and an intermetallic compound of (Cu, Ni) 6 Sn 5 is formed in the Sn-Bi alloy so that the generation of voids in the joint when being jointed to an electrode is suppressed, a thermal fatigue property is excellent, and a good drop impact resistance property can also be obtained. |
