Patent ID: 7754534

Claim:
A method of manufacturing a semiconductor device using a wiring substrate, comprising the steps of: a) forming a peelable resin layer on a silicon substrate, said peelable resin layer having a lower adhesiveness to said silicon substrate and being easily peelable from said silicon substrate; b) forming the wiring substrate on said peelable resin layer; c) mounting a plurality of semiconductor chips on said wiring substrate; d) forming semiconductor devices by sealing said plurality of semiconductor chips by a sealing resin; e) thinning said silicon substrate by a grinding process; f) peeling said semiconductor devices from said silicon substrate with said peelable resin layer being separated from said thinned silicon substrate; g) individualizing said semiconductor devices by dicing said semiconductor devices; and h) exposing terminals provided on said wiring substrate by forming openings through said peelable resin layer or by removing said peelable resin layer.