Patent ID: 6569724
Filing Date: 2003-05-27
Classification: H01L

Abstract:
A method of manufacturing a thin film transistor comprising:forming a gate electrode on an insulating surface of a substrate; forming a gate insulating film over said gate electrode; forming a semiconductor film comprising silicon over said gate electrode with the gate insulating film interposed therebetween; forming a photoresist mask over a portion of said semiconductor film wherein said photoresist mask is prevented from directly contacting said portion of the semiconductor film by an insulating film interposed therebetween; selectively introducing ions of an impurity into said semiconductor film by ion doping using an acceleration voltage to form impurity doped regions in said semiconductor film with a channel region defined below said photoresist mask; removing said photoresist mask after the introduction of said ions; and then irradiating said impurity doped regions with a light in order to anneal said impurity doped regions, wherein said portion of the semiconductor film is covered with said insulating film during the irradiation of said light.