Patent ID: 7722962

Claim:
A semiconductor device comprising: a semiconductor chip, a tab on which the semiconductor chip is to be disposed, a lead serving as an output connector terminal, and a wire which is configured to electrically bond an electrode on the semiconductor chip to the lead, wherein the semiconductor chip and the tab are bonded to together by connection portions containing a solder foil formed from a solder material comprising Cu particles and Sn particles by rolling so as to subject the Sn particles to plastic flow-through between the Cu particles, whereby preventing generation of voids during or after the solder bonding process, wherein the Cu particles are not melted at a soldering temperature of the soldering foil, but the plastically flowing Sn particles are melted to react with the Cu particles at the soldering temperature of the soldering foil, wherein the connection portions further contain a CuSn compound containing Cu 6 Sn 5 which is not melted at the soldering temperature of the soldering foil, and the CuSn compound bonds the Cu particles together.