Patent ID: 7351615
Filing Date: 2008-04-01
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: forming a semiconductor layer comprising amorphous silicon on an insulating surface; crystallizing said semiconductor layer; patterning the crystallized semiconductor layer to form an island-shaped semiconductor layer; forming a gate insulating film over the island-shaped semiconductor layer; forming a gate electrode over said gate insulating film, wherein the gate insulating film extends beyond side edges of the gate electrode; thinning at least portions of the extending portions of the gate insulating film; selectively introducing an impurity ion into the island-shaped semiconductor layer to form impurity regions therein by using at least the gate electrode as a mask through the thinned portions of the gate insulating film; and irradiating said semiconductor layer with light through the thinned portions of the gate insulating film in order to activate portions of the island-shaped semiconductor layer introduced with the impurity ion.