Patent ID: 6448612
Filing Date: 2002-09-10
Classification: G02F,H01L

Abstract:
A semiconductor device comprising:a pixel thin film transistor and a driver circuit for driving said pixel thin film transistor, said pixel thin film transistor comprising: a first semiconductor layer having at least a first low-resistivity impurity region and a first high-resistivity impurity region over a substrate; a first gate electrode adjacent to said first semiconductor layer with a gate insulating film interposed therebetween, wherein said first high-resistivity impurity region does not overlap with said first gate electrode, and said driver circuit comprising at least one thin film transistor, said at least one thin film transistor comprising: a second semiconductor layer having at least a second low-resistivity impurity region and a second high-resistivity impurity region over said substrate; a second gate electrode adjacent to said second semiconductor layer with a gate insulating film interposed therebetween, wherein said second high-resistivity impurity region has a region overlapping with said second gate electrode.