Patent ID: 6194762
Filing Date: 2001-02-27
Classification: H01L

Abstract:
A semiconductor device having at least an n-channel thin film transistor and a p-channel thin film transistor, said semiconductor device comprising:a first semiconductor island on an insulating surface having at least first source and drain regions and a first channel forming region therebetween, for forming said n-channel thin film transistor, anda second semiconductor island on the insulating surface having at least second source and drain regions and a second channel forming region therebetween for forming said p-channel thin film transistor,wherein said second semiconductor island includes a pair of portions adjacent to said second source region and said second drain region respectively, said pair of portions containing n-type and p-type impurities,wherein said second source and drain regions of said p-channel thin film transistor are doped with only the p-type impurity as an impurity for giving one conductivity type, andwherein only said first semiconductor island in said n-channel thin film transistor has a lightly-doped region.