Patent ID: 7138064
Filing Date: 2006-11-21
Classification: H01L,H05K

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: forming an etching-back layer formed of a second material on a supporting substrate formed of a first material, said second material being different in etching rate from said first material; forming a multilayer wiring board on said etching-back layer; etching said etching-back layer to separate said supporting substrate from said multilayer wiring board; mounting a semiconductor chip on said multilayer wiring board; and forming an intermediate layer on said etching-back layer between the steps of forming said etching-back layer and forming said multilayer wiring board, so that said multilayer wiring board is laminated on said etching-back layer, wherein said intermediate layer is etched with the etching of said etching-back layer.