Patent ID: 6375791
Filing Date: 2002-04-23
Classification: B24B

Abstract:
A polishing system for polishing a semiconductor wafer, comprising:a polishing station which is operable to remove material from said wafer, said polishing station having a polishing surface which contacts a first surface of said semiconductor wafer so as to remove said material therefrom; a slurry distribution assembly for advancing a polishing slurry onto said polishing surface, said polishing slurry having a chemical marker present therein; a rinse station which is operable to direct a flow of fluid onto said wafer subsequent to polishing by said polishing station; and a slurry detection station which is operable to detect presence of said chemical marker so as to determine presence of said polishing slurry on said wafer after said flow of fluid has been directed onto said wafer by said rinse station.