Patent ID: 7601575
Filing Date: 2009-10-13
Classification: H01L,Y10S

Abstract:
1. A method of fabricating a semiconductor device comprising: forming a gate oxide layer on a semiconductor substrate; forming a polysilicon layer on the gate oxide layer; patterning the gate oxide layer and the polysilicon layer defining polysilicon gates therein; forming L-shaped nitride spacers adjacent to the polysilicon gates; forming oxide sidewalls over the L-shaped nitride spacers; performing an active region implant into active regions and defining channel regions therebetween the active regions below the polysilicon gates; forming a composite nitride cap over the device; after forming the composite nitride, performing a rapid thermal anneal that alters a dopant profile of the channel regions; removing the composite nitride cap; and after removing the composite nitride cap, forming a silicide region over the active regions.