Patent ID: 6213852
Filing Date: 2001-04-10
Classification: B24B

Abstract:
A polishing apparatus, comprising:a polishing surface portion rotating about a center of rotation, for polishing a surface to be polished;a polishing unit placed above and opposing to said polishing surface portion, for performing a series of polishing and cleaning operations;a chemical liquid supplying unit placed on said polishing surface portion at a side which goes closer to said polishing unit when said polishing surface portion is rotated, for supplying a chemical liquid for polishing operation to said polishing surface portion; anda waste liquid draining unit placed on said polishing surface portion on a side which goes away from said polishing unit when said polishing surface portion is rotated, for draining waste liquid on said polishing surface portion; whereina partition unit having an outer periphery formed to continuously surround the center of rotation of the polishing surface portion is provided to prevent said chemical liquid and said waste liquid on said polishing surface portion from flowing through a region near said center of rotation to a region on said polishing surface portion which is on a side going away from said waste liquid draining unit when said polishing surface portion is rotated,said waste liquid draining unit being arranged continuously from said partition unit to an outer periphery of said polishing surface portion.