| 摘要 |
A power semiconductor device according to the present invention includes a heat sink made of Cu and having a thickness of 2 to 3 mm, an insulating substrate bonded on the heat sink with interposition of a first bonding layer (under-substrate solder), and a power semiconductor element mounted on the insulating substrate. In the heat sink, a buffer slot is formed at a periphery of a region bonded to the insulating substrate. |
