Patent ID: 7824939

Claim:
A method for manufacturing a display device, comprising the steps of: forming, over a substrate, a first source wiring and a second source wiring with a gate wiring interposed therebetween; forming an insulating film over the gate wiring, the first source wiring and the second source wiring; forming a semiconductor film over the insulating film; forming a first resist pattern over the semiconductor film, the first resist pattern including a first region having a first thickness and a second region having a second thickness which is thicker than the first thickness, by using a light-exposure mask through which light is transmitted to have a plurality of intensity; forming a contact hole by etching the semiconductor film and the insulating film selectively, using the first resist pattern as a mask; forming a second resist pattern over the semiconductor film, the second resist pattern including a third region which is included in the second region, by removing the first region of the first resist pattern; forming a semiconductor pattern by etching the semiconductor film selectively, using the second resist pattern as a mask; and forming a stacked layer of a light-transmitting conductive film and a conductive film over the gate wiring, the first source wiring and the second source wiring.