Patent ID: 6511620
Filing Date: 2003-01-28
Classification: B29C,H01L

Abstract:
A method of producing semiconductor devices, comprising the steps of:opening a dividable metal mold which comprises a first metal mold having a first cavity forming surface and a second metal mold having a second cavity forming surface, the first metal mold having a first surface facing the second metal mold while the second metal mold having a second surface facing the first metal mold; disposing a first separation sheet on the first surface including the first cavity forming surface, and a second separation sheet on the second surface including the second cavity forming surface; attaching the first separation sheet and the second separation sheet closely to the first cavity forming surface and the second cavity forming surface by attracting the first separation sheet and the second separation sheet via a plurality of annular suction portions formed in the respective dividing surfaces; placing a substrate provided with a plurality of semiconductor chips on the first separation sheet on the first cavity forming surface; placing a resin piece on said substrate; closing the dividable metal mold so as to form a resin layer by a compression molding technique by using said resin piece provided on the substrate such that a molten resin layer covers a surface of said substrate, said step of closing the dividable metal mold including the step of causing to flow an excess resin out of a cavity formed by said first cavity forming surface and said second cavity forming surface along a path formed between said first separation sheet and said second separation sheet; opening the dividable metal mold so as to remove the substrate having the resin layer formed thereon from the dividable metal mold; removing the first separation sheet and the second separation sheet from the substrate; and dividing the substrate into individual semiconductor devices.