Patent ID: 6380621
Filing Date: 2002-04-30
Classification: H01L,H05K,Y02P

Abstract:
A semiconductor device comprising:a wiring board having one surface and a rear surface opposite to said one surface of said wiring board; a semiconductor chip having a principal surface and a rear surface opposite to said principal surface, said semiconductor chip being mounted on said one surface of said wiring board via a plurality of bump electrodes formed on said principal surface of said semiconductor chip; a plate member having a larger plane size than that of said semiconductor chip, one surface of said plate member being fixed to said rear surface of said semiconductor chip via solder; a resin filled in an area between said one surface of said wiring board and said principal surface of said semiconductor chip; and a radiating fin member fixed on a rear surface opposite to said one surface of said plate member via an elastic layer and by an adhesive strength of said elastic layer; wherein a difference in the thermal expansion coefficient between said plate member and said semiconductor chip is smaller than a difference in the thermal expansion coefficient between said radiating fin member and said semiconductor chip.