Patent ID: 7556983

Claim:
A method of fabricating a semiconductor device, the method comprising the steps of: preparing a wiring substrate and an IC chip, the wiring substrate comprising a base material and a wiring layer formed as a continuous film, the wiring layer comprising a wiring that is formed on this base material, the wiring layer comprising a first surface and a second surface opposed to the first surface, the IC chip having electrode terminals formed on the first surface of the wiring layer; providing conductive posts on desired wiring of said wiring layer of said wiring substrate; connecting surface electrodes of said IC chip to desired wiring of said wiring layer of said wiring substrate; covering said IC chip and said conductive posts that have been arranged on the first surface of said wiring layer of said wiring substrate with an insulating resin; removing all of said base material from said wiring substrate to expose all of the second surface of said wiring layer, and then grinding away said insulation resin to expose end surface of said conductive posts.