Patent ID: 7138303
Filing Date: 2006-11-21
Classification: H01L

Abstract:
1. A method for manufacturing a thin film transistor, comprising the steps of: forming an amorphous silicon layer on an insulating substrate; irradiating said amorphous silicon layer with a laser line beam along a first direction, so that a portion of said amorphous silicon layer irradiate with said laser line beam is converted into a polycrystalline silicon layer; patterning said polycrystalline silicon layer into a polycrystalline silicon island; and forming a source region, a channel region and a drain region of said thin film transistor in said polycrystalline silicon island; wherein said laser line beam irradiating step irradiates said amorphous silicon layer with said laser line beam, so that polycrystalline silicon is grown from portions of said amorphous silicon layer close to edges of said laser line beam to a portion of said amorphous silicon layer close to a center of said laser line beam, said polycrystalline silicon layer being divided into two regions at a line corresponding to the center of said laser line beam; wherein said polycrystalline silicon island is located within either of the two regions of said polycrystalline silicon layer.