Patent ID: 8398456
Filing Date: 2013-03-19
Classification: B24B

Abstract:
1. A method of polishing a substrate, comprising: rotating a polishing table having a polishing surface, a monitoring sensor being mounted on the polishing table; holding a substrate by a top ring; bringing the substrate into contact with the polishing surface while swinging and rotating the top ring to polish the substrate; and monitoring a surface condition of the substrate by the monitoring sensor during polishing of the substrate, wherein a rotational speed of the polishing table and conditions of swing motion of the top ring are determined such that a position of the monitoring sensor, a position of a center of rotation of the top ring, and a direction of the swing motion of the top ring at a point of time when a predetermined period of time has elapsed after polishing of the substrate is started approximately coincide with their previous values at a point of time before said predetermined period of time has elapsed.