Patent ID: 6514862
Filing Date: 2003-02-04
Classification: C09G,H01L

Abstract:
A wafer polishing slurry, comprising:a plurality of polishing particles; a solvent in which the polishing particles are suspended; and a quaternary ammonium compound contained in the solvent and having a form of {Nâ€”(R1R2R3R4)}+Xâˆ’, in which R1, R2, R3 and R4 are radicals and Xâˆ’ is an anion derivative; and wherein the quaternary ammonium compound comprises [(CH3)3NCH2CH2OH]Cl, [(CH3)3NCH2CH2OH]I, [(CH3)3NCH2CH2OH]Br, [(CH3)3NCH2CH2OH]CO3, or mixtures thereof.