Patent ID: 7411344

Claim:
A display device comprising: a gate electrode provided over a substrate; a gate insulating layer provided over the gate electrode; a first semiconductor region provided over the gate insulating layer and having one conductivity; a second semiconductor region provided over the gate insulating layer and having the one conductivity; a channel region provided over the gate insulating layer and between the first semiconductor region and the second semiconductor region and comprising an amorphous semiconductor; a connecting wiring connected with one of the first semiconductor region and the second semiconductor region; an auxiliary wiring provided over the gate insulating layer and in a same layer as the connecting wiring; a first insulating layer provided over the auxiliary wiring and the first semiconductor region and the second semiconductor region and the connecting wiring; a pixel electrode provided over the first insulating layer and connected with the connecting wiring; a second insulating layer surrounding and provided over an end portion of the pixel electrode; an electroluminescent layer provided over the pixel electrode; a counter electrode provided over the electroluminescent layer; and an opening provided in the first insulating layer and the second insulating layer and in a pixel portion comprising the pixel electrode, wherein the auxiliary wiring is connected with the counter electrode via the opening.