Patent ID: 6746958
Filing Date: 2004-06-08
Classification: B24B,H01L

Abstract:
A method of polishing performed on a polishing tool comprised of at least first and second platens, the method comprising:providing a wafer having a layer of copper formed thereabove; performing a timed polishing operation on said layer of copper at said first platen to remove at least some of said layer of copper; performing an endpoint polishing operation on said wafer at said second platen to remove substantially all of said layer of copper remaining after said timed polishing operation is performed at said first platen; determining a duration of said endpoint polishing operation performed on said layer of copper at said second platen; and determining, based upon a comparison between the determined duration of said endpoint polishing operation and a target value for said endpoint polishing operation, a duration of a timed polishing process to be performed on a subsequently processed layer of copper at said first platen.