Patent ID: 6561877
Filing Date: 2003-05-13
Classification: B24B

Abstract:
A system for chemical mechanical polishing incorporating an apparatus for retaining moisture on a polishing pad during machine idling comprising:a chemical mechanical polishing apparatus having at least one polishing pad; a moisture-retaining apparatus for said at least one polishing pad comprising a first half and a second half of a circular disc each having a protruded top portion and a peripheral edge circumferentially extending downwardly in a direction perpendicular to a plane of said circular disc when said two halves are assembled together, said circular disc having a diameter sufficiently large to cover a surface area of said at least one polishing pad with said peripheral edge of said circular disc overlapping a periphery of said at least one polishing pad, a fastening means on an outer surface of said first half and said second half of said circular disc for assembling said two halves together, and a moisture retention means on an inner surface of said first half and said second half of said circular disc for providing a moisturizing environment to said surface area of said at least one polishing pad.