Patent ID: 6217411
Filing Date: 2001-04-17
Classification: B24B

Abstract:
A polishing apparatus comprising:a polishing member having a polishing surface;a carrier to carry an article to be polished;a support supporting said carrier for rotation about said support in a manner such that the article carried by said carrier is engaged with said polishing surface;said carrier and said polishing member being movable relative to each other in a manner such that the article carried by said carrier is moved relative to and on said polishing member, during which a friction force is generated between the article and said polishing surface, thus generating an angular moment acting on said carrier;a sensor device to sense said friction force;a pressing device to apply a pressure to said carrier and thereby to generate a counter angular moment acting against said angular moment; anda control unit to determine a magnitude of said pressure applied to said carrier as a function of said friction force sensed by said sensor device to provide that said counter angular moment compensates said angular moment.