Patent ID: 6758723
Filing Date: 2004-07-06
Classification: B24B

Abstract:
A substrate polishing apparatus for polishing a surface of a substrate by a relative movement between the substrate and a polishing member, comprising: a table, the polishing member fixed on a surface of the table, a substrate support member for pressing the substrate onto the polishing member, an optical system comprising an optical fiber for irradiating a surface of the substrate with a light of irradiation and an optical fiber for receiving a reflected light reflected from the surface of the substrate, and a film-thickness monitoring device for monitoring a status of a film thickness of a thin film on the surface of the substrate on the basis of an analysis of the reflected light received with the optical system;wherein the table is provided with a liquid-feeding opening for feeding a translucent liquid into a through-hole disposed in the polishing member; the liquid-feeding opening is disposed in such a manner that the translucent liquid fed therefrom into the through-hole flows in a direction roughly perpendicular to the surface of the substrate and fills the through-hole; and the optical fiber is disposed in such a manner that the irradiated light and the reflected light, respectively, passes through a flow portion of the translucent liquid flowing in the direction roughly perpendicular to the surface thereof.