Patent ID: 7407838

Claim:
A method for manufacturing a device comprising a pixel region and a drive circuit, each comprising a transistor, with the drive circuit being connected to provide a drive signal to the transistor of the pixel region, said method comprising: forming, at least in the pixel region, an active layer comprising a plurality of semiconductor islands arranged in parallel to each other over a substrate; doping a p-type impurity into said active layer by ion doping to form a source region and a drain region in said active layer, said active layer comprising a part to become a channel region between said source region and said drain region; forming a gate electrode adjacent to said part to become said channel region; activating said p-type impurity by annealing; forming an interlayer insulating film comprising a silicon nitride layer and a silicon oxide layer over said active layer by plasma CVD, said silicon nitride layer and said silicon oxide layer formed over said gate electrode and said active layer; and forming a conductive layer comprising titanium and aluminum over said interlayer insulating film, wherein said transistor of said pixel region comprises said channel region and said gate electrode and said source region and said drain region.