Patent ID: 6537137
Filing Date: 2003-03-25
Classification: B24B,B24D,G11B,H01L,Y10S

Abstract:
A method of polishing a surface of a semiconductor wafer comprising the steps of:(a) providing a polishing pad having a polishing surface comprising a multiplicity of one type of abrasive particle in said polishing surface; (b) holding said wafer in a carrier such that said wafer surface is in contact with said polishing surface; (c) moving said carrier and/or said polishing surface to provide both pressure on said wafer surface and relative lateral motion between said wafer surface and said polishing surface; and (d) providing a reactive liquid solution essentially free from particulate matter at an interface between said wafer surface and said polishing surface, wherein a change in polishing conditions is effected by changing the ionic strength of said reactive liquid solution.