Patent ID: 6899533

Claim:
An apparatus for manufacturing a semiconductor device, comprising: a metal mold consisting of a first metal mold on which a semiconductor wafer substrate is placed, a second metal mold having a cavity, and a third metal mold; and enclosing resin layer forming means for filling said cavity with a molten resin to form an enclosing resin layer on said semiconductor wafer substrate, said enclosing resin layer forming means including: at least one first plunger provided in said third metal mold for filling said cavity with said molten resin under a predetermined injection pressure; a surface of said third metal mold being opposed to said semiconductor wafer substrate on said first metal mold; and sliding means for making either said first and second metal molds or said third metal mold slidable with respect to each other under a pressure of said molten resin filled in said cavity, said apparatus further comprising: a first pressure application means for applying a first pressure higher than a resin pressure of said molten resin to either first and second metal molds or said third metal mold in a first direction opposite to a second direction of said resin pressure; and a second pressure application means for applying a second pressure lower than said resin pressure in said second direction.