Patent ID: 6897477

Claim:
A semiconductor device comprising a thin film transistor, the thin film transistor comprising: a semiconductor layer formed over an insulating surface; an insulating film formed on the semiconductor layer; and a plurality of gate electrodes formed on the insulating film, wherein the semiconductor layer comprises: a plurality of channel forming regions overlapped with the plurality of gate electrodes through the insulating film interposed therebetween; a source region; a drain region; and a first low concentration impurity region located between a first channel forming region and the source region, wherein the first channel forming region is selected from the plurality of channel forming regions; and a second low concentration impurity region located between a second channel forming region and the drain region, wherein the second channel forming region is selected from the plurality of channel forming regions, wherein an interval between neighboring two of the plurality of gate electrodes is shorter than a width of at least one of the first and second low concentration impurity regions.