Patent ID: 6409582
Filing Date: 2002-06-25
Classification: B08B,B24B,H01L

Abstract:
A polishing apparatus for polishing a surface of a workpiece, said apparatus comprising:a turntable having thereon a polishing surface; a top ring for holding a workpiece to be polished and for pressing the workpiece against said polishing surface on said turntable; a pusher for transferring the workpiece between said top ring and said pusher, said pusher having a workpiece support vertically movable between a transfer position close to said top ring, where transfer of the workpiece occurs, and a withdrawn position, where the workpiece transferred to said support is spaced from and confronts said top ring; a first cleaning device for ejecting a cleaning liquid toward the workpiece, on said pusher, which has been polished and removed from said top ring, said first cleaning device being operable to clean both surfaces of said workpiece simultaneously; a second cleaning device for cleaning said workpiece which has been polished and cleaned by said first cleaning device; and a transfer device for transferring the cleaned workpiece from the second cleaning device to a wafer cassette.