Patent ID: 6602793
Filing Date: 2003-08-05
Classification: C23C,H01J,H01L,Y10S

Abstract:
A pre-clean chamber for receiving a gas for etching a semiconductor wafer wherein said pre-clean chamber has a chamber wall and a chamber cover and further comprises:a wafer pedestal for supporting said wafer during etching wherein said wafer pedestal has a bottom surface and an outside diameter surface; an insulator mounted adjacent to said wafer pedestal for insulating said bottom surface of said wafer pedestal during etching of said wafer; and an insulator collar removably coupled to said insulator and annularly disposed around said outside diameter surface of said wafer pedestal, wherein said insulator collar insulates at least a portion of said outside diameter surface of said wafer pedestal during etching of said wafer, and wherein said insulator collar comprises a single disposable piece.