Abrading – Machine – Rotary reciprocating tool
Patent
1996-07-19
1998-10-27
Eley, Timothy V.
Abrading
Machine
Rotary reciprocating tool
451127, 451 58, B24B 700
Patent
active
058271155
ABSTRACT:
A polishing apparatus for polishing a workpiece such as a semiconductor wafer to a flat mirror finish includes a rotary drum provided on a surface thereof with a polishing pad. A stand supports the workpiece to be polished. A controlling device controls reciprocation of the drum and rotation of the workpiece to obtain a relationship:
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patent: 2145980 (1939-02-01), Hadwiger et al.
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patent: 4471582 (1984-09-01), Neary
patent: 4837985 (1989-06-01), Mayama
patent: 5486134 (1996-01-01), Jones et al.
Banks Derris H.
Ebara Corporation
Eley Timothy V.
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