Patent ID: 6390903
Filing Date: 2002-05-21
Classification: B24B,H01L

Abstract:
A precise polishing apparatus comprising:polishing body holding means for holding a polished body with a polished surface thereof facing upwardly and for enabling to rotate the polished body around a center of the polished surface; a rotatable polishing head for holding a polishing pad having a diameter greater than a diameter of the polished body with a polishing surface thereof facing downwardly and for rotating said polishing pad around a center of the polishing surface; and a supply opening provided in a center of said polishing head and adapted to supply a liquid to the polished surface via said polishing pad, wherein the polishing is effected in conditions that a rotation axis of the polished body is deviated from a rotation axis of said polishing pad, and that said polishing pad is contacted with an entire area of the polished surface of the polished body, and that the supply opening is always located within the polished surface of the polished body during polishing.