Patent ID: 6503839
Filing Date: 2003-01-07
Classification: B24B

Abstract:
A chemical mechanical polishing (CMP) assembly comprising:at least one pad; a carriage adapted to receive a wafer having a first layer to be planarized, wherein the at least one pad and the carriage are translated with respect to each other; a liquid supply system that supplies liquid to the interface between the at least one pad and the wafer positioned on the carriage so that when the at least one pad and the wafer positioned on the carriage are positioned adjacent each other and translated with respect to each other, the first layer of the wafer is removed; an end point detection system that detects an end point corresponding to when the first layer has been substantially planarized; and a dopant supply system that provide a selected dopant to the liquid so as to enhance end point determination by the end point detection system.