Patent ID: 7525158

Claim:
A semiconductor device comprising: a substrate; at least one pixel electrode formed over the substrate; at least one first thin film transistor electrically connected to the pixel electrode; a peripheral circuit for driving the first thin film transistor, said peripheral circuit comprising at least one second thin film transistor and each of the first and second thin film transistors comprising: a semiconductor film having source and drain regions, a channel region between the source and drain regions, and a pair of high resistivity regions between the channel region and the source and drain regions, respectively; a gate insulating film adjacent to the channel region; and a gate electrode adjacent to the channel region with the gate insulating film interposed therebetween, wherein the pair of high resistivity regions is partly overlapped with the gate electrode in the second thin film transistor, and wherein any overlap of the pair of high resistivity regions with the gate electrode in the second thin film transistor is greater than any overlap of the pair of high resistivity regions with the gate electrode in the first thin film transistor.