Patent ID: 8172648
Filing Date: 2012-05-08
Classification: B24B,B24D

Abstract:
1. A polishing pad, comprising: a chemical agent at a molecular weight of 10,000 to 500,000 present in an amount sufficient to be released and dissolving into an aqueous abrasive particle polishing medium during chemical mechanical planarization and reducing abrasive particle agglomeration; a binder, formed into the pad, wherein said pad includes a surface and wherein as said pad is abraded, the surface is renewed exposing at least a portion of said chemical agent; wherein said chemical agent is coated on fibers; wherein the fibers comprise fibers soluble in the aqueous abrasive particle polishing medium during chemical mechanical planarization; wherein said chemical agent comprises polyvinyl alcohol sourced from polyvinyl acetate and exhibits greater than 50% hydrolysis of said polyvinyl acetate precursor wherein said polyvinyl alcohol is present in a range of 0.1 to 50.0% by volume of said pad.