Patent ID: 7381648
Filing Date: 2008-06-03
Classification: C09G,C09K,H01L

Abstract:
1. A method for polishing a copper containing substrate comprising the steps of: a. preparing a polishing composition having an abrasive, at least one oxidizer, and from about 0.1 to 5.0 wt % of a complexing agent wherein the slurry does not include a separate passivating film-forming agent in addition to the complexing agent, and wherein the complexing agent is selected from the group consisting of citric acid, lactic acid, tartaric acid, succinic acid, acetic acid, malonic acid, oxalic acid, amino acids, amino sulfuric acids, salts thereof, and mixtures thereof; b. applying the chemical mechanical polishing slurry to the substrate; and c. removing at least a portion of the copper from the substrate by bringing a pad into contact with the substrate and moving the pad in relation to the substrate.