Patent ID: 6589872
Filing Date: 2003-07-08
Classification: B24B

Abstract:
A method of polishing semiconductor surfaces, said surfaces containing copper line depositions, comprising:providing a semiconductor substrate, said semiconductor substrate containing a pattern of copper deposition; providing a chemical mechanical polishing apparatus; and providing a method for controlling rate of slurry flow to said chemical mechanical polishing apparatus, said rate of slurry flow being a step function as a function of time comprising two rates of slurry flow, said two rates of slurry flow being a first rate of slurry flow and a second rate of slurry flow, said first rate of slurry flow being a low rate of slurry flow, said low rate of slurry flow extending over a time for a low rate of slurry flow, said second rate of slurry flow being a high rate of slurry flow, said high rate of slurry flow extending over a time for a high rate of slurry flow, total time of application of said rate of slurry flow being time required to complete polishing said copper deposition on said semiconductor substrate.