Patent ID: 8629441

Claim:
A semiconductor device comprising: a driver circuit comprising a first transistor and a pixel comprising a second transistor and a pixel electrode layer over an insulating surface, the first transistor comprising: a first gate electrode layer over the insulating surface; a gate insulating layer over the first gate electrode layer; a first oxide semiconductor layer comprising a first channel formation region over the first gate electrode layer with the gate insulating layer therebetween; a first oxide conductive layer and a second oxide conductive layer over the first oxide semiconductor layer; an oxide insulating layer over the first oxide conductive layer and the second oxide conductive layer and in contact with the first oxide semiconductor layer and in contact with peripheries and side surfaces of the first oxide conductive layer and the second oxide conductive layer; a first source electrode layer over the oxide insulating layer and in contact with the first oxide conductive layer; a first drain electrode layer over the oxide insulating layer and in contact with the second oxide conductive layer; and a conductive layer overlapping with the first channel formation region; the second transistor comprising: a second gate electrode layer over the insulating surface; a second oxide semiconductor layer comprising a second channel formation region over the second gate electrode layer with the gate insulating layer therebetween; and a second source electrode layer and a second drain electrode layer over the second oxide semiconductor layer, wherein the second gate electrode layer, the second oxide semiconductor layer, the second source electrode layer and the second drain electrode layer each have a light-transmitting property, and wherein the conductive layer is provided in the same layer as the pixel electrode layer.