Platen structure of polishing apparatus for processing...

Abrading – Abrading process – Glass or stone abrading

Reexamination Certificate

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C451S285000, C451S287000, C451S494000

Reexamination Certificate

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11260902

ABSTRACT:
A platen structure of a polishing apparatus for semiconductor wafer and a method for exchanging a polishing pad affixed to the same are provided in which the polishing pad supported by the platen is exchanged with convenience within a short time. The platen structure of the polishing apparatus in which the polishing pad attached to the platen of the polishing apparatus comprises a pad plate to which the polishing pad for polishing a wafer is attached, and a platen body combined with the pad plate and having at least one vacuum hole formed thereto to provide a vacuum passage.

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patent: 2003/0114079 (2003-06-01), Berkstresser et al.
patent: 405191036 (1993-07-01), None

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