Patent ID: 6568997
Filing Date: 2003-05-27
Classification: C09G,C09K,C23F,H01L

Abstract:
An aqueous polishing composition used for the chemical mechanical polishing of semiconductor devices having a copper metal circuit and having a pH of under 5.0 and comprises(a) a water soluble carboxylic acid polymer comprising polymerized unsaturated carboxylic acid monomers having a number average molecular weight of about 20,000 to 1,500,000 (b) 1 to 15% by weight of an oxidizing agent, (c) up to 3.0% by weight of abrasive particles, (d) 50-5,000 ppm (parts per million) of an inhibitor, (e) up to 3.0% by weight of a complexing agent, and (f) 0.1 to 5.0% by weight of organic polymer particles, wherein the polymer has a number average molecular weight of at least 500,000 determined by gel permeation chromatography and a glass transition temperature of at least 25Â° C.