LITHOGRAPHIC APPARATUS HAVING AN ACTIVE DAMPING SUBASSEMBLY

    公开(公告)号:SG152185A1

    公开(公告)日:2009-05-29

    申请号:SG2008078487

    申请日:2008-10-21

    Abstract: A lithographic apparatus includes a projection system to project a patterned radiation beam onto a substrate, and a damping system to dampen a vibration of at least part of the projection system, the damping system including an interface damping mass and an active damping subsystem to dampen a vibration of at least part of the interface damping mass, the interface damping mass connected to the projection system, and the active damping subsystem connected to the interface damping mass, the active damping subsystem including a sensor to measure a position quantity of the interface damping mass and an actuator to exert a force on the interface damping mass based on a signal provided by the sensor. The damping system further includes an interface damping device connected to the interface damping mass and configured to damp a movement of the interface damping mass at an eigenfrequency of the interface damping mass.

    Controlling a position of a mass, especially in a lithographic apparatus

    公开(公告)号:SG129279A1

    公开(公告)日:2007-02-26

    申请号:SG200401493

    申请日:2004-02-26

    Inventor: BUTLER HANS

    Abstract: A controller, especially in a lithographic apparatus, for controlling a position of a mass, e.g. a substrate table (12), by means of a control force. The controller receives a feedback position signal from said mass (12) and calculates an estimated mass (m) from said feedback position signal and from said control force. Then, the controller uses the estimated mass (m) and a desired mass acceleration to determine the control force needed to accelerate the mass (12), and move it to a desired position.

    Lithographic apparatus and device manufacturing method

    公开(公告)号:SG123690A1

    公开(公告)日:2006-07-26

    申请号:SG200507863

    申请日:2005-12-06

    Abstract: A lithographic apparatus includes a first movable element (such as an immersion liquid supply system), which is in operation in contact with a surface of a second movable element (such as a substrate table). Further, the lithographic apparatus includes a second element controller (such as a substrate table controller) to control a position quantity of the second movable element. Disturbance forces caused by, e.g., movements of the first and second movable elements with respect to each other, due to capillary forces disturb a position of the first and second movable elements. To at least partly correct a position of the second movable element due to such disturbance forces, the lithographic apparatus includes a feedforward control path to provide a disturbance force feedforward signal to the second element controller, the feedforward control path including a disturbance force estimator to estimate a disturbance force from a position quantity of the first movable element.

    LITHOGRAPHIC APPARATUS, DEVICE MANUFACTURING METHOD, AND DEVICE MANUFACTURED THEREBY

    公开(公告)号:SG110195A1

    公开(公告)日:2005-04-28

    申请号:SG200405761

    申请日:2004-09-16

    Inventor: BUTLER HANS

    Abstract: A lithographic apparatus including a position control system to control a position of a moveable object is presented, The position control system includes a position controller, an object represented as an object filter, a position feedback circuit, and an acceleration control system. The acceleration control system includes a subtractor and a first filter in a first circuit branch and a second filter in a second circuit branch. A position controller signal output from the position controller is input into the subtractor of the acceleration control system. An external disturbance force, however, is directly exerted upon the object. Thus, a first transfer function from the input of the subtractor to the acceleration of the object for the position controller force may be different than a second transfer function from the input of the object to the acceleration of the object for the disturbance force. Preferably, the first transfer function is identical to a transfer function for the position controller force in case no acceleration control system is present in the position control system.

    LITHOGRAPHIC APPARATUS FOR TRANSFERRING PATTERN FROM PATTERNING DEVICE ONTO SUBSTRATE, AND DAMPING METHOD

    公开(公告)号:SG180091A1

    公开(公告)日:2012-05-30

    申请号:SG2011073129

    申请日:2011-10-06

    Abstract: The invention relates to a lithographic apparatus including a support frame which is supported by a base via a vibration isolation system; a projection system arranged to transfer a pattern from a patterning device onto a substrate, wherein the projection system includes a first frame which is spring-supported by the support frame; and an active damping system configured to damp movement of the first frame, including: a first sensor system configured to provide a first sensor output representative of absolute movement of the first frame, a first actuator system arranged to apply a force between the first frame and the support frame, and a control system configured to provide a drive signal to the first actuator system based on the first sensor output.FIG 2

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