Patent ID: 9704776
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising a semiconductor module and a cooler bonded to each other by a bolt, wherein the semiconductor module includes an external conductive terminal with a first through-hole, and a second through-hole that communicates with the first through-hole and disposed under the first through-hole, the cooler has a top plate that has a third through-hole communicating with the second through-hole and has a fin adhered thereto, and a bottom plate that has a depressed portion for accommodating the fin and forming a refrigerant passage, and a side portion surrounding the depressed portion, the side portion of the cooler includes a screw hole for a female screw aligned with the third through-hole, the bolt has a head portion with a larger outer diameter than the first through-hole, and a shaft portion that extends from the head portion, is inserted through the first through-hole, the second through-hole, and the third through-hole, and screwed and tightened to the screw hole, the external conductive terminal is formed not to conduct electricity to the cooler through the bolt, the bolt, the top plate of the cooler, and the bottom plate of the cooler are made of metal, the screw hole is a screw hole that is threaded in a nut made of an insulation material and embedded in a side portion of the cooler, and an inner surface of the third through-hole has an insulation layer.