Patent ID: 8097884
Filing Date: 2012-01-17
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: a driver circuit including a first thin film transistor and a pixel portion including a second thin film transistor; wherein the pair of first impurity regions through the pair of fifth impurity regions contain an impurity element that imparts a conductivity, wherein the pair of first impurity regions are provided so as to interpose the first channel forming region, wherein the pair of second impurity regions are provided so as to interpose the first channel forming region and the pair of first impurity regions, wherein the pair of third impurity regions are provided so as to interpose the first channel forming region, the pair of first impurity regions and the pair of second impurity regions, wherein the pair of fourth impurity regions are provided so as to interpose the second channel forming region, wherein the pair of fifth impurity regions are provided so as to interpose the second channel forming region and the pair of fourth impurity regions, wherein the first gate electrode overlaps the pair of the first impurity regions, and does not overlap the pair of second impurity regions, wherein the impurity element contained in the pair of third impurity regions is at a higher concentration than the impurity element contained in the pair of first impurity regions and the pair of second impurity regions, wherein the second gate electrode does not overlap the pair of fourth impurity regions, and wherein the impurity element contained in the pair of fifth impurity regions is at a higher concentration than the impurity element contained in the pair of fourth impurity regions.