Patent ID: 7071037
Filing Date: 2006-07-04
Classification: G02F,H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a gate wiring over an insulating surface; forming an insulating film covering the insulating surface and the gate wiring; forming a first amorphous semiconductor film over the insulating film; forming a second amorphous semiconductor film containing an impurity element of one conductivity type over the first amorphous semiconductor film; forming a metal film over the second amorphous semiconductor film; etching the metal film, the second amorphous semiconductor film and the first amorphous semiconductor film continuously to form a side edge of the first amorphous semiconductor film into a taper shape; forming a transparent conductive film in contact with the metal film; and etching the transparent conductive film, the metal film, the second amorphous semiconductor film and the first amorphous semiconductor film to expose a part of the first amorphous semiconductor film, to form a pixel electrode from the transparent conductive film, to form a source wiring from the metal film and to form a source region and a drain region from the second amorphous semiconductor film.