Patent ID: 7858455
Filing Date: 2010-12-28
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: forming a gate electrode over a substrate; forming a gate insulating film over the gate electrode; forming a microcrystalline semiconductor film over the gate insulating film; forming an amorphous semiconductor film over the microcrystalline semiconductor film; forming a semiconductor film to which an impurity imparting one conductivity type is added over the amorphous semiconductor film; forming a conductive film over the semiconductor film to which the impurity imparting the one conductive type is added; emitting a laser light to the conductive film to modify at least the amorphous semiconductor film into a microcrystalline semiconductor film; and forming a channel-etch type thin film transistor while the conductive film remains over the semiconductor film to which the impurity imparting one conductivity type is added.