Patent ID: 6083083
Filing Date: 2000-07-04
Classification: B24B,B24D

Abstract:
A separation type of surface plate for grinding or polishing, comprising:a surface plate body configured to be connected to a drive of a grinding or polishing apparatus, said surface plate body having a plurality of suction ports dispersed on an entire surface of said surface plate body;a disk for grinding or polishing a semiconductor wafer on said surface plate body, said disk being rotatable with said surface plate body, the surface plate body and the disk having a different thermal expansion; andmeans for detachably holding said disk on said surface plate body by substantially uniform suction force applied through said suction ports so that said semiconductor wafer is capable of being placed in contact with said disk directly or indirectly through an abrasive cloth, the suction force applied by the holding means being selected so that said disk is held while thermal expansion of the disk occurs in a face direction of said disk without deformation of the disk in a thickness direction of said disk, the suction force applied by the holding means maintaining surface accuracy of the disk.