Patent ID: 6879001
Filing Date: 2005-04-12
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; an insulation film formed on said semiconductor substrate; a silicon layer which is formed on said insulation film and which has a first source region and a second source region, a first drain region and a second drain region, and a first channel region and a second channel region formed between the first source region and the first drain region, and between the second source region and the second drain region, respectively; a first gate insulation film and a second gate insulation film formed over said first channel region and said second channel region respectively; and a first gate electrode layer and a second gate electrode layer formed over said first gate insulation film and said second gate insulation film respectively, wherein a thickness of the first channel region is smaller than 10 nm and a thickness of the second channel region is larger than 10 nm and wherein a threshold voltage at the first channel region is larger than a threshold voltage at the second channel region.