Patent ID: 6984550
Filing Date: 2006-01-10
Classification: G02F,H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: forming a semiconductor layer on an insulating surface; forming a first insulating film on the semiconductor layer; forming a gate electrode, a source wiring of a pixel portion, and an electrode of a terminal portion on the first insulating film by laminating a material film containing mainly TaN, a material film containing mainly Al, and a material film containing mainly Ti and then etching using masks; adding an impurity element for providing an n-type to the semiconductor layer using the gate electrode as a mask to form an n-type impurity region; etching the gate electrode to form a taper portion; forming a second insulating film which covers the source wiring of the pixel portion and the terminal portion; and forming a gate wiring and a source wiring of the driver circuit on the second insulating film.