Patent ID: 8830217

Claim:
A semiconductor device comprising a pixel, the pixel comprising: a first thin film transistor comprising a semiconductor layer, with a first insulating film over the semiconductor layer, and a gate over the semiconductor layer with the first insulating film therebetween; a photodiode comprising a photoelectric conversion layer; a sensor output wiring and a sensor electric power source line; and a second insulating film over the gate of the first thin film transistor; wherein the first insulating film is disposed over the photoelectric conversion layer, wherein the pixel is configured to irradiate the photoelectric conversion layer with light reflected by a subject, wherein a first terminal of the first thin film transistor is electrically connected to the sensor output wiring, wherein a second terminal of the first thin film transistor is electrically connected to the sensor electric power source line, wherein the gate of the first thin film transistor is electrically connected to a first terminal of the photodiode, wherein the semiconductor layer and the photoelectric conversion layer are on a same surface, and wherein the second insulating film is in contact with the first insulating film over the photoelectric conversion layer.