Patent ID: 9403255
Filing Date: 2016-08-02
CPC Classification: B24B

Claim Text:
1. A polishing apparatus for polishing a substrate by bringing the substrate into contact with a polishing surface, comprising: a substrate holder having a substrate holding surface configured to press the substrate against the polishing surface and further having a retaining ring arranged so as to surround the substrate, the retaining ring being configured to be tiltable independently of the substrate holding surface, wherein the retaining ring is brought into contact with the polishing surface during polishing of the substrate; a rotating mechanism configured to rotate the substrate holding surface and the retaining ring together about an axis of the substrate holder; and at least one local load exerting mechanism configured to exert a local load on a part of the retaining ring in a direction perpendicular to the polishing surface, the at least one local load exerting mechanism being arranged so as not to move in accordance with the rotation of the substrate holder.