Patent ID: 6348368
Filing Date: 2002-02-19
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, said method comprising the steps of:selectively forming a mask insulating film over an amorphous semiconductor film; selectively introducing a catalytic element for promoting crystallization of said amorphous semiconductor film into an introducing region of said amorphous semiconductor film by using the mask insulating film; converting at least a portion of said amorphous semiconductor film into a crystalline semiconductor film by a first heat treatment; selectively adding an element selected from group 15 into a region of said crystalline semiconductor film by using the mask insulating film; gettering said catalytic element into said region from an adjacent region to said region by a second heat treatment; forming an active layer by patterning the crystalline semiconductor film; forming a gate insulating film covering the active layer; and carrying out a third heat treatment in an oxidizing atmosphere after forming said gate insulating film.