Patent ID: 7872868

Claim:
A mounting structure for a power module, comprising: a power module including a power semiconductor device that is an exothermic body; a heat sink to which a lower surface of the power module is fixed with a power module fixing screw, the heat sink including a plurality of heat radiation fins; and a printed circuit board to which a portion of the power module on the side of the power module opposite to that on the heat sink is connected by soldering, wherein, in the heat sink, a screw hole having a female screw thread into which the power module fixing screw is screwed is formed so as to penetrate the heat sink from a power module mounting surface to the plurality of heat radiation fins, and wherein the power module fixing screw is constructed such that, to mount the power module on the heat sink, a screw head of the power module fixing screw is tightened from the printed circuit board side and that, to remove the power module from the heat sink, the power module fixing screw is loosened from the heat radiation fin side on the side of the power module fixing screw opposite to the screw head.