Patent ID: 8414789

Claim:
A metal surface polishing composition comprising: a) an abrasive ranging from 10 ppm to about 100 ppm; b) an ionic liquid compound comprising an imidazolium salt having the general molecular structure: where R 1 is selected from H, normal-alkyl, branched alkyl, alkoxy, and alkyl thioether groups; R 2 is selected from H, normal-alkyl, branched alkyl, alkoxy, and alkyl thioether groups; R 3 is selected from normal-alkyl, branched alkyl, alkoxy, alkyl thioether, cyclic and non-aromatic rings, heterocyclic non-aromatic rings and other suitable organic groups; and anion is selected from a univalent and a multivalent anion; and c) an oxidizing agent d) a substrate comprising a metal surface; e) a polishing pad.