Patent ID: 9358659
Filing Date: 2016-06-07
CPC Classification: B24B,C08K,C09G

Claim Text:
1. A chemical-mechanical polishing composition comprising: (a) abrasive particles, (b) a polymer, wherein the polymer comprises monomers that are an (alkyl)acrylic acid, a salt thereof, or a combination thereof and 0-3 mol % of a comonomer having a sulfonate group or sulfonic acid group, and wherein the polymer has a weight-average molecular weight of about 1000 to about 4000 g/mol, and (c) water, wherein the following conditions are satisfied: (i) the polymer possesses an overall charge, (ii) the abrasive particles have a zeta potential Za measured in the absence of the polymer and the abrasive particles have a zeta potential Zb measured in the presence of the polymer, wherein the zeta potential Za is a numerical value that is the same sign as the overall charge of the polymer, and (iii) |zeta potential Zb|>|zeta potential Za|.