Patent ID: 7112123

Claim:
A method of planarizing or polishing a surface comprising polishing the surface with a composition comprising (a) a liquid carrier, and (b) solids comprising about 0.1 to about 10% by weight clay abrasive particles, and about 0.1% to about 50% by weight CeO 2 , particles, based on the total weight of the composition, said clay abrasive particles having a particle size such that at least 90% of the particles, by number, when dispersed in water, have a particle size in the range of about 10nm to about 10μm, and the CeO 2 abrasive particles having a particle size such that at least 90% of the particles, by number, when dispersed in water, have a particle size in the range of larger than 0.1μm to about 10μm.