Damping arrangement, active damping system, lithographic...

Photocopying – Projection printing and copying cameras – Step and repeat

Reexamination Certificate

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Reexamination Certificate

active

08059259

ABSTRACT:
An active damping system assembly is configured to dampen a vibration of at least part of a structure. The assembly includes a plurality of active dampers each including a sensor configured to measure a position quantity of an interface mass mounted on the structure; and an actuator configured to exert a force on the interface mass in dependency of a signal provided by the sensor, wherein each of the plurality of active damping systems is connected to the interface mass. The structure may be a projection system of a lithographic apparatus.

REFERENCES:
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patent: 6441884 (2002-08-01), Takahashi et al.
patent: 6462828 (2002-10-01), Takeishi
patent: 2003/0197914 (2003-10-01), Cox et al.
patent: 2005/0224687 (2005-10-01), Heertjes et al.
patent: 2007/0144842 (2007-06-01), Zhou
patent: 2009/0051889 (2009-02-01), Ishikawa
patent: 09-004677 (1997-01-01), None
patent: 2001-027280 (2001-01-01), None
patent: 2003-203860 (2003-07-01), None
patent: 2005-315426 (2005-11-01), None
English language Abstract of Japanese Patent Publication No. JP 09-004677 A, Japanese Patent Office, Patent & Utility Model Gazette DB, (1997).
English language Abstract of Japanese Patent Publication No. JP 2001-027280 A, Japanese Patent Office, Patent & Utility Model Gazette DB, (2001).
English language Translation of Notice of Reasons for Rejection for Japanese Patent Application No. JP 2008-290443, mailed on Sep. 27, 2010.
Van Der Wijst et al., “Lithographic Apparatus, Projection Assembly and Active Damping”, U.S. Appl. No. 12/244,879, filed Oct. 3, 2008, 15 pgs.

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