Patent ID: 6790883
Filing Date: 2004-09-14
Classification: B24B,B24D,C08L

Abstract:
A composition for a polishing pad which comprises a water-insoluble matrix material containing a crosslinked polymer and water-soluble particles dispersed in the water-insoluble matrix material, wherein said water-soluble particles are provided with an outer shell for inhibiting moisture absorption in at least a part of the outermost part, wherein said water-soluble particles are selected from the group consisting of (1) organic water-soluble particles comprising at least one material selected from the group consisting of dextrin, cyclodextrin, mannit, lactose, hydroxypropylcellulose, methylcellulose, starch, protein, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylic acid, polyethylene oxide, water-soluble photosensitive resin, sulfonated polyisoprene and sulfonated polyisoprene copolymer, (2) inorganic water-soluble particles comprising at least one material selected from the group consisting of potassium acetate, potassium nitrate, potassium carbonate, potassium bicarbonate, potassium chloride, potassium bromide, potassium phosphate and magnesium nitrate, and (3) mixtures of (1) and (2).