Patent ID: 7247082

Claim:
A polishing composition comprising an abrasive, a pH adjusting agent, an improver of a selective ratio, and water, wherein the abrasive is contained in an amount of from 0.5 to 30% by weight, the pH adjusting agent is contained in an amount of from 0.01 to 3% by weight, the improver of a selective ratio is contained in an amount of 0.3 to 30% by weight, and water is contained in an amount of 45 to 99.49% by weight, wherein the weight % is based on the weight of the polishing composition, and wherein the improver is one or more compounds selected from the group consisting of methylamine, ethylamine, propylamine, isopropylamine, dimethylamine, diethylamine, dipropylamine, diisopropylamine, ethylenediamine, 1,2-diaminopropane, 1,3-propanediamine, 1,4-butanediamine, hexamethylenediamine, N,N,N′,N′-tetramethyl-1,6-diaminohexane, 6-(dimethylamino)-1-hexanol, bis(3-aminopropyl)amine, triethylenetetraamine, diethylene glycol bis(3-aminopropyl) ether, piperazine, and piperidine.