Patent ID: 7205172

Claim:
A method of manufacturing a display device, said method comprising the steps of: forming a conductive first scanning line and a conductive second scanning line arranged in parallel with each other, a first insulating film covering said first scanning line and said second scanning line, and a semiconductor film covering said first insulating film; forming a first protective mask and a second protective mask for protecting a first channel region and a second channel region, respectively, of said semiconductor film, the first channel region and the second channel region being opposed to said first scanning line and said second scanning line, respectively; and injecting an impurity of a first conduction type and an impurity of a second conduction type into a switching element region for forming a switching element including said first scanning line and a storage capacitance region for forming a storage capacitance including said second scanning line, respectively, in said semiconductor film, in a state in which said first protective mask and said second protective mask are formed.