Patent ID: 7204936

Claim:
A polishing composition comprising: a roll-off reducing agent comprising an inorganic compound having a property of controlling a surface potential of an abrasive in a polishing composition, wherein a surface potential of the abrasive in a standard polishing composition is controlled to −110 to 250 mV by the presence of the inorganic compound, wherein the standard polishing composition is prepared which comprises 20 parts by weight of an abrasive, said abrasive being a high-purity alumina having an Al 2 O 3 purity of 98.0% or more, and wherein the Al 2 O 3 is composed of an α-type corundum crystal, 1 part by weight of citric acid, 78 parts by weight of water and 1 part by weight of an inorganic compound, and wherein the inorganic compound is at least one compound selected from the group consisting of a sulfur-containing inorganic acid or a salt thereof, a phosphorus-containing inorganic acid or a salt thereof, a halogen-containing inorganic acid or a salt thereof, a carbonate, a cyanate, and a metal atom-containing inorganic acid or a salt thereof.