Patent ID: 6679756
Filing Date: 2004-01-20
Classification: B24B,G01B,H01L

Abstract:
A polishing state monitoring method in which a polishing state of an object of polishing which is polished by application of a first load between a polishing body and the object of polishing with a polishing agent interposed between the polishing body and the object of polishing, and by causing the polishing body and the object of polishing to move relative to each other, is monitored during polishing, comprising the steps of:irradiating a reflective body with a probe light emitter from a light source; acquiring a reference spectrum form the light reflected from the reflective body; irradiating the object of polishing with the probe light emitted from the light source; acquiring a measured spectrum of the light reflected by the object of polishing during polishing; and monitoring the polishing state of the object of polishing during polishing based on a relationship between the measured spectrum and the reference spectrum.