Patent ID: 8384086

Claim:
A semiconductor device comprising: a first gate electrode formed in a first region on a transparent insulating substrate; a second gate electrode formed in a second region on the transparent insulating substrate; a gate insulating film, which is formed on the transparent insulating substrate and on both an upper part of the first gate electrode and an upper part of the second gate electrode; an amorphous semiconductor film, which is formed to contact the gate insulating film in the first region; a crystalline semiconductor film, which is formed to contact the gate insulating film in the second region; a first thin-film transistor, which is formed on the amorphous semiconductor film, and which includes a first amorphous semiconductor layer including two separate impurity regions and a second amorphous semiconductor layer; and a second thin-film transistor, which is formed on the crystalline semiconductor film, and which includes a third amorphous semiconductor layer including two separate impurity regions and a fourth amorphous semiconductor layer, wherein the first thin-film transistor and the second thin-film transistor are arranged to be near to each other by a distance that is beyond positional accuracy of laser irradiation.