Patent ID: 6465288
Filing Date: 2002-10-15
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, said method comprising the steps of:forming an amorphous semiconductor film comprising silicon over a substrate; introducing a catalyst element for accelerating crystallization of said amorphous semiconductor film into the amorphous semiconductor film; crystallizing said amorphous semiconductor film; forming a gettering region by selectively introducing a group-13 impurity element and a group-15 impurity element into a crystallized semiconductor film; and gettering said catalyst element in a region of the crystallized semiconductor film where neither of the group-13 impurity element nor the group-15 impurity element was introduced in the step of forming said gettering region to said gettering region, wherein said gettering region contains the group-13 impurity element at a concentration equal to or higher than that of the group-15 impurity element.