| 摘要 |
The present invention provides a substrate holding apparatus which can adjust a holding state of a substrate in accordance with a polishing state, and maintain uniformity of a polishing amount over an entire surface of the substrate, or control the polishing amount intentionally. The substrate holding apparatus comprises a holding plate having a holding surface for a substrate, a cover element for covering a backside surface of the holding plate to form a sealed back pressure space at the backside surface side, a plurality of through-holes distributed over the substantially entire holding surface for allowing the holding surface to communicate with the back pressure space, a division element removably provided for dividing the back pressure space between the holding plate and the cover element into a plurality of predetermined sealed divisional spaces in a plane, and a back pressure controller for individually controlling back pressures in the divisional spaces. |
