Patent ID: 11884843
Assignee: FUJIMI INCORPORATED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  H | IPC B  C  H

Claim 0:
1. A polishing composition comprising:
abrasive grains; a basic inorganic compound; an anionic water-soluble polymer; and a dispersing medium,
wherein a zeta potential of the abrasive grains is negative,
wherein the abrasive grains are alumina, wherein more than 50% of the alumina is in a γ-phase,
an aspect ratio of the alumina is less than 1.1,
in a particle size distribution of the abrasive grains obtained by a laser diffraction/scattering method, a ratio D90/D50 of a particle diameter D90 when an integrated particle mass reaches 90% of a total particle mass from a fine particle side to a particle diameter D50 when the integrated particle mass reaches 50% of the total particle mass from the fine particle side is more than 2.0, and
the basic inorganic compound is an alkali metal salt.