Patent ID: 6089959
Filing Date: 2000-07-18
Classification: B24B

Abstract:
A polishing apparatus comprising:a lower turn table having a polishing surface on its upper surface and a rotational axis;an upper turn table having a polishing surface on its lower surface and provided so as to have a rotational axis coaxial with the rotational axis of the lower turn table;an intermediate turn table having a polishing surface on its upper and lower surfaces and interposed between the lower turn table and the upper turn table so as to have a rotational axis coaxial with the rotational axis of the upper and lower turn tables;disk-like carriers with a plurality of apertures provided on the upper surface of the lower turn table and the upper surface of the intermediate turn table;a carrier rotating mechanism for rotating each of the carriers on axis thereof while revolving the carriers around the rotational axis of the turn tables; anda table rotating mechanism for driving the lower, upper and intermediate turn tables.