Patent ID: 6685543
Filing Date: 2004-02-03
Classification: B24B,H01L

Abstract:
A compensating chemical mechanical wafer polishing apparatus comprising:a wafer carrier, said wafer carrier comprising a bearing rod movable in vertical direction; a polishing module, said polishing module comprising a main polishing head, a compensating polishing head, a screw rod controlled to reciprocate said compensating polishing head transversely relative to said main polishing head, the pressure and polishing speed of said compensating polishing head varying with the position change of said compensating polishing head to achieve compensating polishing; and a cleaning module, said cleaning module comprising a wafer/wafer carrier water knife, and a polishing head cleaning water knife adapted to clean the wafer and said wafer carrier, and the main polishing head and compensating polishing head of said polishing module.