Patent ID: 6096162
Filing Date: 2000-08-01
Classification: B24B

Abstract:
A chemical mechanical polishing (CMP) machine comprising:a carousel located in a housing, which is located on a platen;at least one polishing table mounted on the carousel;a polishing pad mounted on the polishing table;a holder on the polishing table to hold a wafer from its backside so as to press a front surface of the wafer onto the polishing pad;a tube on the polishing table to distribute a slurry onto the polishing pad near the wafer;an exhaust duct having a first end and a second end, in which the first end is coupled to the housing in order to allow the slurry to be properly exhausted; andan exhaust control unit on the exhaust duct between the first end and the second end, in which the exhaust control unit is remotely controlled to determine whether the slurry is exhausted or not.wherein when a CMP process is performed, the carousel, the polishing pad, and the holder are properly rotating in their own individual directions.