Abrading – Abrading process – Glass or stone abrading
Reexamination Certificate
2007-01-02
2007-01-02
Morgan, Eileen P. (Department: 3723)
Abrading
Abrading process
Glass or stone abrading
C451S285000, C451S287000, C451S494000
Reexamination Certificate
active
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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Kim Kyung-Hyun
Ko Yong-Sun
Min Chung-Ki
Marger & Johnson & McCollom, P.C.
Morgan Eileen P.
Samsung Electronics Co,. Ltd.
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