Patent ID: 6354918
Filing Date: 2002-03-12
Classification: B24B

Abstract:
An apparatus for polishing a surface of a workpiece comprising:a turntable having a polishing surface thereon; a top ring for holding a workpiece and pressing the workpiece against said polishing surface under a given pressure to polish the workpiece; a mechanism for moving said top ring in a horizontal plane while the workpiece is in contact with said polishing surface to project a part of a polished surface of the workpiece from said polishing surface after polishing, and then raising said top ring holding the workpiece to remove the workpiece from said polishing surface; and a dresser for dressing said polishing surface, said dresser dressing said polishing surface from an inner portion to an outer circumferential edge of said polishing surface so that a step is not formed from an area located at said inner portion of said polishing surface and used for polishing the workpiece to said outer circumferential edge of said polishing surface.