Patent ID: 6338667
Filing Date: 2002-01-15
Classification: B23Q,B24B,G05B

Abstract:
A polishing system comprising:a wafer polishing assembly for polishing a face of a semiconductor wafer at a polishing rate and a polishing uniformity, the wafer polishing assembly including a platen subassembly defining a polishing area, a polishing head shaft, and a polishing head supported by the polishing head shaft for rotation relative to the polishing head shaft, the polishing head being configured to support the semiconductor wafer, the wafer polishing assembly further including a polishing head displacement mechanism supporting the polishing head shaft relative to the platen subassembly and configured to translate the polishing head shaft relative to the platen subassembly along a polishing path which is variable between a linear polishing path and a non-linear polishing path, to cause the polishing head to polish the wafer face; and a controller configured to adjust the polishing path.