Patent ID: 7303945

Claim:
A method for forming a pattern of a stacked film, comprising: (a) forming sequentially a first base insulating film and a light shielding material on a transparent substrate; (b) patterning said light shielding material to obtain a light shielding film with a first pattern; (c) forming sequentially a second base insulating film, a semiconductor film and a first oxide film on a substrate; (d) forming a resist pattern with a second pattern on the first oxide film; and (e) forming a pattern of a stacked film including said semiconductor film and the first oxide film by dry etching the first oxide film and said semiconductor film, above said light shielding film, wherein said dry etching includes an etching by using an etching gas and said resist pattern as a mask, and said semiconductor film includes a taper angle which is controlled to be within predetermined range.