Patent ID: 8053305
Filing Date: 2011-11-08
Classification: H01L

Abstract:
1. A method for producing a semiconductor device, comprising: forming an element isolation film in an element isolation region in a substrate; forming a first conductivity type or second conductivity type well in an active region separated by the element isolation film; forming a gate insulation film on the active region separated by the element isolation film; forming a source region and a drain region having a conductivity type opposite to the conductivity type of the well, in a part of a surface of the substrate in each active region; and forming a gate electrode on the gate insulation film over a channel region formed between the source region and the drain region, wherein after the step of forming the gate electrode, the step of forming the well and at least part of the step of forming the source region and the drain region are performed by ion implantations with the same resist mask.