Patent ID: 6050884
Filing Date: 2000-04-18
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 movable vertically between a transfer position close to said top ring, whereat transfer of the workpiece occurs, and a withdrawn position, whereat the workpiece transferred to said support is spaced from and confronts said top ring;a cleaning device for, after the workpiece has been polished and transferred from said top ring to said support and when said support is moved to said withdrawn position, ejecting a cleaning liquid toward and cleaning upper and lower surfaces of the workpiece and a lower surface of said top ring; andsaid cleaning device including at least one cleaning unit, disposed vertically between said lower surface of said top ring and the upper surface of the workpiece when the workpiece is supported on said support at said withdrawn position, for ejecting the cleaning liquid toward said lower surface of said top ring and the upper surface of the workpiece.