Patent ID: 7396709
Filing Date: 2008-07-08
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: (a) providing a semiconductor film; (b) melting and solidifying the semiconductor film so as to obtain a crystalline semiconductor layer including protruding portions on a surface thereof; (c) forming a gate insulating film on the crystalline semiconductor layer; (d) depositing a conductive film on the gate insulating film; and (e) patterning the conductive film to form a gate electrode for controlling a conductivity of a channel region; wherein the gate electrode has an inclined side surface, and at least one of the protruding portions on the surface of the semiconductor layer is located under the inclined side surface of the gate electrode; and the at least one of the protruding portions on the surface of the semiconductor layer has an inclined side surface, and a side surface inclination angle of the gate electrode is larger than an inclination angle of the at least one of the protruding portions on the surface of the crystalline semiconductor layer.