Patent ID: 7278466

Claim:
A semiconductor device cooling apparatus including a heat transmission plate that receives heat from a semiconductor device at approximately the center of an outer surface and forms a coolant flow path in contact with the inner surface of the heat transmission plate opposite to the outer surface thereof facing the semiconductor device, further comprising: a coolant supply port that supplies a coolant to the central portion of the inner surface of the heat transmission plate; a gap-shaped flow path sandwiched between the inner surface of the heat transmission plate and a surface that extends in parallel with the inner surface, the gap-shaped flow path radially flowing out the coolant supplied to the central portion of the inner surface of the heat transmission plate from the central portion toward the peripheral edge portion of the inner surface of the heat transmission plate; a coolant collection groove which is formed around the peripheral edge portion and whose height from the inner surface of the heat transmission plate is larger than the height of the gap-shaped flow path to collect the coolant flowing out from the gap-shaped flow path; a coolant discharge port that discharges the coolant collected in the coolant collection groove therefrom, a gap forming plate disposed partly in contact with the inner surface of the heat transmission plate to form the gap-shaped flow oath between the surface extending in parallel with the inner surface and the inner surface; an elastic member which presses the gap forming plate against the inner surface of the heat transmission plate as well as whose side acts as a side wall which partitions the coolant collection groove; and a housing that keeps the elastic member in the state that the elastic member presses the gap forming plate as well as partitions the coolant collection groove in cooperation with the outer peripheral portion of the inner surface of the heat transmission plate and a side of the elastic member.