Patent ID: 7220676
Filing Date: 2007-05-22
Classification: C09G

Abstract:
1. A process for producing a substrate comprising a step of polishing a substrate to be polished with a polishing composition comprising: water; an abrasive; a roll-off reducing agent comprising one or more compounds selected from the group consisting of carboxylic acids having 2 to 20 carbon atoms having either hydroxyl group or groups or SH group or groups, monocarboxylic acids having 1 to 20 carbon atoms, and dicarboxylic acids having 2 to 3 carbon atoms, and salts thereof; and an intermediate alumina wherein said abrasive is α-alumina and the amount of the intermediate alumina is from 1 to 100 parts by weight based on 100 parts by weight of α-alumina wherein said abrasive differs from an intermediate alumina.