Patent ID: 8114775

Claim:
A method of polishing comprising the step of movably contacting the surface of an integrated circuit substrate having a metal or metallic compound thereon with a polishing composition comprising: 1) water; 2) an abrasive material; 3) a per-type oxidizer; 4) at least one of: a) between about 2 ppm and about 0.4% of soluble transitional metal ion-containing polishing accelerators selected from iron ions, copper ions, or mixture thereof, or b) iron polishing accelerators, copper polishing accelerators, or a mixture thereof coated on the abrasive; wherein the polishing accelerators are not metal ions removed from the surface of the substrate; and 5) an α,β-dihydroxy enolic compound present in an amount between about 6*10 −5 to about 4.5*10 −3 moles per liter wherein the α,β-dihydroxy enolic compound effectively chelates metal ion contaminants and thereby removes the metal ion contaminants from the substrate, wherein the α,β-dihydroxy enolic compound comprises a compound of formula 2: wherein R 3 is a moiety comprising between two and four linked atoms independently selected from C, O, S, P, and N having any of single and/or double bonds between adjacent atoms and the α,β-dihydroxy enolic portion can form a 5-, 6-, or 7-member ring, wherein any C, P, or N atom of the R 3 structure independently is optionally substituted with moieties containing between 1 and 20 atoms selected from C, O, S, P, and N in a straight chain, branched chain, or ring-containing structure having any of single and/or double bonds between adjacent atoms.