Patent ID: 6524523
Filing Date: 2003-02-25
Classification: B22F,B24B,B24D,C23C

Abstract:
A method of forming a dresser pad for chemical mechanical polishing comprising the steps of:a) providing a flat metal bottom seat with an upper surface, the bottom seat having a circular periphery; b) mixing welding metal powder, organic glue and water to form a liquid; c) uniformly distributing the liquid on the flat metal bottom seat so as to form a single sintering layer on at least a portion of the upper surface; d) uniformly distributing diamond grains in the sintering layer, the diamond grains having a grain size between 50 and 250&mgr;m and a distribution of between 60 and 2500 grains per square centimeter; and, e) sintering the sintering layer by heating the flat metal bottom seat, the sintering layer and the diamond grains at a rate of between 3Â° C. and 20Â° C. per minute to a temperature of between 700Â° C. and 1100Â° C. for between 10 and 60 minutes.