Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Reexamination Certificate
2006-09-20
2008-03-25
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
C318S632000
Reexamination Certificate
active
07348752
ABSTRACT:
A stage apparatus and a lithographic apparatus comprising such a stage apparatus are described. The stage apparatus includes an electromagnetic motor arranged to displace an object table, an electromagnetic actuator configured to position the object table and a device configured to provide a current to the stage apparatus such that, in use, an effect of a stray field of the electromagnetic motor on the electromagnetic actuator is at least partly compensated by the current.
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ASML Netherlands B.V.
Pillsbury Winthrop Shaw & Pittman LLP
Ro Bentsu
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