Patent ID: 6783434
Filing Date: 2004-08-31
Classification: B24B,B24D,C09G,C09K,H01L

Abstract:
A CMP abrasive comprisinga cerium oxide slurry containing cerium oxide particles, a dispersant and water; and a liquid additive containing a dispersant and water; wherein each of the dispersants contained in the cerium oxide slurry and the liquid additive respectively is a polymer dispersant; wherein said polymer dispersant is a polymer containing ammonium acrylate as a copolymerized ingredient, a polyammonium-acrylate or a polyamine-acrylate, and wherein the cerium oxide slurry contains 0.01 to 2.0 parts by weight of the dispersant relative to 100 parts by weight of the cerium oxide particles and contains 0.3 to 40% by weight of the cerium oxide particles based on the cerium oxide slurry, and the liquid additive contains 1 to 10% by weight of the dispersant.