Patent ID: 6827638
Filing Date: 2004-12-07
Classification: B24B

Abstract:
A polishing apparatus comprising:a polishing table; and a work holding plate, wherein a work held on the holding plate is polished supplying a polishing agent solution, and the polishing table is formed in one-piece by casting, a structure of the polishing table is such that a plurality of recesses and/or a plurality of ribs are provided on a rear surface thereof, a flow path for a temperature adjusting fluid is formed inside for the polishing table, portions in each of which the flow path is not formed act as an internal rib structure, and a value of a thermal expansion coefficient of a material of the polishing table is 5Ã—10âˆ’6/Â° C. or less and corrosion resistance of the material is almost equal to that of stainless steel.