Patent ID: 11884844
Assignee: NISSAN CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  H | IPC C

Claim 0:
1. A post-polishing composition for elimination of a laser mark remaining after polishing of a silicon wafer with a primary polishing composition, the post-polishing composition comprising silica particles, water, a tetraalkylammonium ion, and a water-soluble polymer, wherein the mass ratio of the tetraalkylammonium ion to SiO2 of the silica particles is 0.200 to 1.000:1; the mass ratio of SiO2 dissolved in the post-polishing composition to SiO2 of the silica particles is 0.100 to 1.500:1; and the mass ratio of the water-soluble polymer to SiO2 of the silica particles is 0.005 to 0.05:1.