Patent ID: 6413149
Filing Date: 2002-07-02
Classification: B24B,B24D,H01L

Abstract:
An abrading plate for polishing an object to produce a flat and mirror surface thereon, said abrading plate comprising:abrasive particles having a particle size of less than two micrometers, a chemical purity of more than 90%, and a Na concentration of below 100 ppm; a binder material; and a porosity; wherein a ratio of said abrasive particles and said binder material is 1:x, where x is not less than 0.5 by volume, and said abrasive particles, said binder material and said porosity are in a proportion such that said abrasive particles are not less than 10% by volume, said binder material is not more than 60% by volume, and said porosity is 10Ëœ40% by volume.