Patent ID: 8035107

Claim:
A method for manufacturing a display device, comprising: forming a first conductive film; forming a first insulating film over the first conductive film; forming a semiconductor film over the first insulating film; forming an impurity semiconductor film over the semiconductor film; forming a second conductive film over the impurity semiconductor film; forming a first resist mask over the second conductive film; first etching the first insulating film, the semiconductor film, the impurity semiconductor film, and the second conductive film by using the first resist mask so that at least a surface of the first conductive film is exposed; second etching a portion of the first conductive film by side etching to form a gate electrode and a supporting portion; forming a second resist mask over the second conductive film; third etching the second conductive film, the impurity semiconductor film, and a portion of the semiconductor film by using the second resist mask to form a source electrode layer, a drain electrode layer, a source region, a drain region, and a semiconductor layer so that a thin film transistor is formed; removing the second resist mask; forming a second insulating film to cover the thin film transistor; forming an opening portion in the second insulating film so that the source electrode layer or the drain electrode layer is partially exposed; and selectively forming a pixel electrode in the opening portion and over the second insulating film, wherein the supporting portion is formed in a region overlapping with the opening portion.