Patent ID: 7078277
Filing Date: 2006-07-18
Classification: G02F,H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising the steps of: forming a first light-shielding film on an insulating surface; forming an underlying insulating film on the first light-shielding film; forming a semiconductor film over the first light-shielding film through the underlying insulating film; selectively introducing an impurity element to the semiconductor film to form a source region and a drain region; forming a first insulating film on the semiconductor film; partly etching the first insulating film to expose a part of the first light-shielding film, source region and drain region; forming a conductive film on the first insulating film; etching the conductive film to form a gate electrode, a source interconnection and a drain interconnection; forming a second insulating film covering the first insulating film, the gate electrode, the source interconnection and the drain interconnection; forming a second light-shielding film overlapped with the first light-shielding film on the second insulating film; forming a third insulating film covering the second insulating film and the second light-shielding film;