Patent ID: 6863592

Claim:
A CMP (chemical/mechanical polishing) method, comprising the steps of: loading a wafer into a chemical/mechanical polishing apparatus, the wafer comprising a polishing stopper and a target layer to be polished deposited thereon; and performing CMP on the target layer on the wafer while supplying a CMP slurry between the surface of the target layer and a polishing pad, wherein the CMP slurry comprises metal oxide abrasive particles, a removal rate accelerator, an anionic polymeric passivation agent having a molecular weight in a range of about 1,000 to about 100,000, a C1-C12 anionic passivation agent, and water, wherein the anionic polymeric passivation agent comprises one of poly(acrylic acid), poly(methacrylic acid), poly(acrylic acid-maleic acid), poly(methacrylic acid-maleic acid), poly(acrylic acid-acrylamide), poly(acrylonitrile-butadien-acrylic acid), poly(acrylonitrile-butadien-methacrylic acid), a derivative or salt of any of the foregoing, and any combination thereof.