Patent ID: 6719618
Filing Date: 2004-04-13
Classification: B24B

Abstract:
A polishing apparatus, comprising a cover body which is opened at a bottom thereof, has a space therein, and has an elastic membrane indirectly secured to or in a portion of an inner wall thereof through a flexor and a support plate, a surface of the inner wall in a portion at which the secured elastic membrane may contact due to flex of the membrane or the flexor being made of fluororesin, wherein the cover body covers a side and a backside surface of a workpiece placed on a polishing pad on a polishing platen, a surface of the workpiece is polished by providing relative motion between the polishing platen and the workpiece while fluid introduced into an upper space above the elastic membrane expands the elastic membrane to press the backside of the workpiece in a direction toward the polishing platen.