Patent ID: 6452198
Filing Date: 2002-09-17
Classification: H01J

Abstract:
A method for minimizing contamination of a semiconductor wafer to be implanted with a fabrication dopant within an implantation system, the method including the steps of:A. coating surfaces of an implantation chamber of said implantation system by performing a first implantation process with a coating dopant, before said semiconductor wafer is placed within said implantation chamber, to encapsulate contaminants on said surfaces of said implantation chamber with said coating dopant during said step A; B. coating surfaces of components disposed within said implantation chamber with said coating dopant, during said step A, to encapsulate contaminants on said surfaces of said components of said implantation chamber with said coating dopant during said step B; C. placing said semiconductor wafer within said implantation chamber after said steps A and B; and D. performing a second implantation process for doping said semiconductor wafer with said fabrication dopant within said implantation chamber, after said step C.