Patent ID: 8221190
Filing Date: 2012-07-17
Classification: B24B

Abstract:
1. A polishing apparatus configured to polish a work having two surfaces, the polishing apparatus being configured to simultaneously polish the two surfaces of the work, said polishing apparatus comprising: a pair of stools, each of which has a polishing surface that contacts a corresponding one of the two surfaces of the work, the stools rotating in opposite directions; a pair of detecting units, each of which is configured to detect a rotation rate of a corresponding one of the pair of stools; a pressurizing unit configured to compress the work between the pair of stools; a slurry supply unit configured to supply a slurry to one of the pair of stools; and a control unit configured to reduce, when a frictional force between at least one of the polishing surfaces of the pair of stools and the work exceeds a threshold, at least one of a load applied by the pressurizing unit, at least one of rotation rates of the pair of stools, and a supply amount of the slurry supplied by the slurry supply unit.