Patent ID: 7868957

Claim:
A method for manufacturing a thin film transistor, comprising the steps of: forming a first insulating film having a depression and a projection; forming a first conductive film in the depression by spurting droplets containing a first conductive material; forming a second insulating film so as to cover the first insulating film and the first conductive film; forming a first semiconductor film over the second insulating film; forming a second semiconductor film containing an impurity element over the first semiconductor film; simultaneously patterning the second insulating film, the first semiconductor film and the second semiconductor film, forming a second conductive film by spurting droplets containing a second conductive material so that the second conductive film covers a side surface of each of the second insulating film, the first semiconductor film and the second semiconductor film; etching the second semiconductor film by using the second conductive film as a mask; wherein the first insulating film and the first conductive film are formed so that top surfaces thereof are flat.