Patent ID: 7470582
Filing Date: 2008-12-30
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: (a) preparing an SOI substrate formed by a semiconductor substrate, an insulating layer on said semiconductor substrate and a silicon layer on said insulating layer and said silicon layer has a first conductivity type in first, second and third regions; (b) forming a partial oxide film with thickness not reaching to said insulating layer in a surface of said silicon layer in said second region between said first and third regions; (c) forming a gate electrode through a gate oxide film on said surface of said silicon layer in said first region, said gate electrode extending on said partial oxide film in said second region; (d) introducing a first impurity of a second conductivity type into both ends of said gate electrode in said first region using a first mask layer covering said third region and exposing said first region; and (e) introducing a second impurity of said first conductivity type into said third region using a second mask layer covering said first region and exposing said third region, wherein said first mask layer covers said third and second regions and a part of said gate electrode in said second region.