Patent ID: 8455322

Claim:
A method of forming a semiconductor structure comprising: providing a substrate; selecting a first dopant and a second dopant different from said first dopant; forming an initial semiconductor layer on said substrate, said initial semiconductor layer having a top surface; implanting said second dopant into said initial semiconductor layer to form an implant region at a predetermined depth below said top surface; removing defects from said top surface of said initial semiconductor layer caused by said implanting and simultaneously activating said second dopant in said implant region with minimal diffusion of said second dopant into other regions of said initial semiconductor layer by performing a laser anneal; and forming an additional semiconductor layer on said top surface, said additional semiconductor layer being any one of in-situ doped and subsequently doped with said first dopant, said removing said defects minimizing diffusion of said first dopant from said additional semiconductor layer into said initial semiconductor layer.