Patent ID: 6125859
Filing Date: 2000-10-03
Classification: C23C,H01J,Y10S

Abstract:
A method for removing residue from an interior surface of a substrate processing chamber, said method comprising:performing a plurality of cleaning stages, each one of said plurality of cleaning stages comprising:generating reactive halogen radicals by dissociating a halogen-containing gas using microwave energy,forming a gaseous cleaning mixture by mixing said reactive halogen radicals with an inert gas in a mixing ratio, andreacting a portion of said reactive halogen radicals with a portion of a residue accumulated on an interior surface of the substrate processing chamber to remove said portion of said residue, wherein said mixing ratio is equal to a first mixing ratio during one of said plurality of cleaning stages and said mixing ratio is equal to a second mixing ratio during another of said plurality of cleaning stages, said first and said second mixing ratios being different.