13-10-2016 дата публикации
Номер: US20160300809A1
Принадлежит:
Hitachi, Ltd.
A semiconductor device has: a semiconductor chip a connected member connected to the semiconductor chip via a solder alloy (lead-free solder alloy) and an external terminal electrically connected to the semiconductor chip The above-described solder alloy of the semiconductor device is composed of: Cu of 5 to 10 weight %; any one, two, or more of Bi of 1 weight % or more and 4 weight % or less, Sb of 1 weight % or more and less than 10 weight %, and In of 1 weight % or more and 4 weight % or less; and Sn as a residual. 1. A lead-free solder alloy having a solder composition comprising:Cu of 5 to 10 weight %;any one, two, or more of Bi of 1 weight % or more and 4 weight % or less, Sb of 1 weight % or more and less than 10 weight %, and In of 1 weight % or more and 4 weight % or less; andSn as a residual.2. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the Bi is added by 1 weight % or more and 4 weight % or less.3. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the In is added by 1 weight % or more and 4 weight % or less.4. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the Sb is added by 1 weight % or more and less than 10 weight %.5. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the Bi is added by 1 weight % or more and 4 weight % or less, and the In is added by 1 weight % or more and 4 weight % or less.6. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the Bi is added by 1 weight % or more and 4 weight % or less, and the Sb is added by 1 weight % or more and less than 10 weight %.7. The lead-free solder alloy according to claim 1 ,wherein, among the Bi, the Sb, and the In, the In is added by 1 weight % or more and 4 weight % or less, and the Sb is added by 1 weight % or more and less than 10 weight %.8. A semiconductor device comprising:a ...
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