Patent ID: 7029373

Claim:
A chemical mechanical polishing slurry being free of heteropolyacid, said slurry comprising an abrasive and an oxidizing agent selected from the group consisting of hydrogen peroxide, iodic acid, potassium iodate, ferric nitrate, ammonium chlorite, ammonium chlorate, ammonium iodate, ammonium perborate, ammonium perchlorate, ammonium periodate ammonium persulfate, tetramethylammonium chlorite, tetramethylammonium chlorate, tetramethylammonium iodate, tetramethylammonium perborate, tetramethylammonium perchlorate, tetramethylammonium periodate, tetramethylammonium persulfate, and urea, wherein said abrasive consists essentially of organic polymer.