Patent ID: 6926589
Filing Date: 2005-08-09
Classification: B24B

Abstract:
1. An apparatus that is capable of providing for an adjustable thickness profile to a workpiece comprising: a workpiece holder for holding the workpiece such that a frontside of the workpiece is exposed within a processing area; a flexible polishing pad that has a frontside adapted to contact and establish linear movement with the front face of the workpiece, the flexible polishing pad being made of a single body material and having a thickness of less than 20 mils; and a fluid emitter capable of providing fluid through a plurality of holes to the backside of the flexible polishing pad within the processing area, the plurality of holes arranged in a plurality of groups, such that each group contains a different plurality of holes and a difference in pressure causing a difference in polishing rate on correspondingly different areas of the frontside of the workpiece.