Patent ID: 6998299

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: forming an island shape semiconductor film over a substrate; forming a first insulating film on the island shape semiconductor film; forming an island shape gate electrode and a capacitor wiring over the island shape semiconductor film with the first insulating film interposed therebetween; forming a second insulating film covering the gate electrode and the capacitor wiring; forming a first contact hole to reach the gate electrode by selectively etching the second insulating film; forming a scanning line to be connected to the gate electrode on the second insulating film; forming a third insulating film on the scanning; forming a second contact hole to reach the semiconductor film by selectively etching the third insulating film; forming a signal line to be electrically connected to the island shape semiconductor film; forming a fourth insulating film over the signal line; and forming a pixel electrode over the fourth insulation film.