Patent ID: 6618252
Filing Date: 2003-09-09
Classification: H01L,H05K

Abstract:
A heat sink of a module with a built-in integrated circuit (IC), said heat sink comprising:a circuit board formed with a plurality of first through holes extending from an upper surface of the circuit board to a lower surface of the circuit board; a metal-attached IC mounted to the lower surface of the circuit board via a metallic member attached to an upper surface of the metal-attached IC; a first conductive material provided on the upper surface of the circuit board, the first conductive material filling the first through holes so that the first conductive material is in contact with the metallic member; a module case for receiving the circuit board therein while including upper and lower cases made of a metal; and a depressed structure formed at the upper case for contacting the first conductive material on the upper surface of the circuit board with the upper case.