Stage apparatus and lithographic apparatus

Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 5304811 (1994-04-01), Yamada et al.
patent: 6441514 (2002-08-01), Markle
patent: 6531793 (2003-03-01), Frissen et al.
patent: 6608317 (2003-08-01), Nakasuji
patent: 6770890 (2004-08-01), Tanaka
patent: 6864601 (2005-03-01), Sogard
patent: 7224429 (2007-05-01), Hol et al.
patent: 2002/0096647 (2002-07-01), Moors et al.
patent: 2003/0155820 (2003-08-01), Tominaga et al.

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