Patent ID: 6451697
Filing Date: 2002-09-17
Classification: C09G,H01L

Abstract:
A method of removing at least a part of a copper-containing material from a substrate surface, the method comprising chemical-mechanical polishing (CMP) the substrate using an abrasive-free composition having a pH and oxidation-reduction potential in the domain of passivation of the copper-containing material, the composition comprising:one or more chelating agents having one or more amine or amide groups selected from the group of ethylenediaminetetraacetic acid, ethylenediamine, methylformamide, and combinations thereof, wherein the one or more chelating agents comprise between 0.2 wt. % and about 3 wt. % of the abrasive-free composition; one or more oxidizers; one or more corrosion inhibitors; and deionized water.