Patent ID: 8709836
Filing Date: 2014-04-29
Classification: H01L

Abstract:
1. A method for manufacturing a display device, comprising the steps of: stacking a light-blocking film, a base film, a first conductive film, a first insulating film, a semiconductor film, an impurity semiconductor film, and a second conductive film in this order; forming a first resist mask over the second conductive film; performing a first etching on the second conductive film, the impurity semiconductor film, the semiconductor film, the first insulating film, the first conductive film, the base film, and the light-blocking film using the first resist mask; performing a second etching in which part of the first conductive film is side-etched to form a gate electrode layer of a thin film transistor; forming a second resist mask over the second conductive film; completing the thin film transistor by performing a third etching on the second conductive film, the impurity semiconductor film, and part of the semiconductor film using the second resist mask to form a source and drain electrode layer in the second conductive film, a source and drain region in the impurity semiconductor film, and a semiconductor layer in the semiconductor film; removing the second resist mask; forming a second insulating film so as to cover the thin film transistor; forming an opening portion in the second insulating film so that part of the source and drain electrode layer is exposed; and selectively forming a pixel electrode layer, thereby forming a pixel electrode over the opening portion and the second insulating film and electrically connecting a portion a the second conductive film to a portion of the second conductive film.