Patent ID: 8759842

Claim:
A semiconductor device comprising: a bonding layer over a substrate; an insulating film and a first pixel electrode, which is embedded in the insulating film, over the bonding layer; an island-shaped single-crystal semiconductor layer over the insulating film; a channel formation region and high-concentration impurity regions in the island-shaped single-crystal semiconductor layer; a gate insulating film and a gate electrode over the island-shaped single-crystal semiconductor layer; an interlayer insulating film which covers the island-shaped single-crystal semiconductor layer, the gate insulating film, and the gate electrode; a wiring which electrically connects one of the high-concentration impurity regions and the first pixel electrode to each other over the interlayer insulating film; a partition which covers the interlayer insulating film, the island-shaped single-crystal semiconductor layer, the gate insulating film, and the gate electrode and has an opening in a region over the first pixel electrode; a light-emitting layer in a region which is over the first pixel electrode and surrounded by the partition; and a second pixel electrode which is electrically connected to the light-emitting layer over the light-emitting layer and the partition, wherein a surface of the first pixel electrode, which is in contact with the light-emitting layer, is flat, and wherein a surface where the insulating film is in contact with the island-shaped single-crystal semiconductor layer roughly coincides with a surface where the first pixel electrode is in contact with the light-emitting layer.