Patent ID: 6916742
Filing Date: 2005-07-12
Classification: C09G,C09K,H01L

Abstract:
1. An aqueous slurry useful for chemical mechanical planarizing a semiconductor substrate comprising by weight percent, 0.1 to 25 oxidizing agent, 0.1 to 20 silica particles having an average particle size of less than 200 nm, 0.005 to 0.8 polyvinyl pyrrolidone (PVP) for coating the silica particles to increase the zeta potential at least 2 millivolts, 0.01 to 10 inhibitor for decreasing removal rate of at least one nonferrous metal, 0.001 to 10 complexing agent for the nonferrous metal and a balance water and incidental impurities; and the aqueous slurry having a pH of 7 to 12.