Patent ID: 7883655

Claim:
A method of manufacturing a semiconductor device comprising the steps of; preparing a molding apparatus comprising an upper half having a substrate mounting plate and a lower half coupled with said upper half to form a cavity therebetween, said substrate mounting plate facing to said cavity, and said lower half including a projecting part which faces to said cavity and projects to a substantial center point of said substrate mounting plate; fixing a semiconductor substrate on said substrate mounting plate of said upper half, said semiconductor substrate including a chip formation region and a circumferential region which surrounds said chip formation region, a first principal surface on which interconnection layers formed in said chip formation region and columnar electrodes connected to said interconnection layers are formed, and a second principal surface which is reverse to said first principal surface; attaching a release film so as to cover a surface of said lower half facing to said cavity; heating said upper half and said lower half; mounting an encapsulating resin material on said release film; encapsulating said semiconductor substrate with said resin material by clamping either one of said lower half or said upper half on the other while forming a vacuum in said cavity after coupling said lower half and said upper half.