Patent ID: 6251000
Filing Date: 2001-06-26
Classification: B24B

Abstract:
A method for polishing a substrate by pressing the substrate against a polishing pad using a substrate holder which comprises:a substrate-holding head including a fluid path which allows a pressurized fluid supplied from one end of the fluid path to flow out from the other end of the fluid path;a seal member shaped like a ring which is secured to the substrate-holding head so as to surround the other end of the fluid path; anda guide member provided on an outer side of the seal member in the substrate-holding head,wherein a space is formed by the substrate disposed on the polishing pad, the substrate-holding head and the seal member,the method comprising the steps of:pressing a central region of the substrate against the polishing pad using the pressurized fluid flowing out from the other end of the fluid path into the space;pressing a peripheral region of the substrate except an outer edge region of the substrate against the polishing pad using the seal member; andguiding the substrate so as to prevent the substrate from going out, using the guide member while having the substrate polished by the polishing pad.