Patent ID: 7129137
Filing Date: 2006-10-31
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a first insulating film having a first thickness in a first region on a semiconductor substrate; forming a first gate electrode on said first insulating film; forming a second insulating film having a second thickness different from said first thickness on said semiconductor substrate and said first gate electrode; forming a conductive film on said second insulating film; forming a first resist pattern and a second resist pattern respectively on said conductive film in said first region excluding a central part of said first gate electrode and on said conductive film of a second region different from said first region; removing said conductive film by using the first resist pattern as a mask to form a second gate electrode covering said first gate electrode via said second insulating film; and removing said conductive film by using the second resist pattern as a mask to form a third gate electrode on said second insulating film of said second region.