Patent ID: 6524961
Filing Date: 2003-02-25
Classification: B24B,B24D,H01L

Abstract:
A processing method comprising the steps of:preparing a wafer to be processed; and processing a surface of the wafer by pressing the surface of the wafer against a fixed abrasive tool containing abrasive grains, supplying a processing liquid onto the fixed abrasive tool and moving the wafer and the fixed abrasive tool relative to each other, to form a processed wafer; wherein the fixed abrasive tool has pores and contains impurities harder than a material forming the surface of the wafer, the impurities being included in a content of 10 ppm or below so as to avoid scratches in the surface of the processed wafer, wherein the abrasive grains include those having length diameter/breadth diameter ratios of three or above, wherein the abrasive grains have a bulk density of 1 g/cm3 or below, and wherein the fixed abrasive tool has pores of which a mean pore diameter is 0.2 &mgr;m or below.