Lithographic apparatus and device manufacturing method
First Claim
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1. An exposure apparatus, comprising:
- a projection system configured to project a plurality of radiation beams onto a target;
a movable frame that is at least rotatable around an axis;
an actuator system to cause the movable frame to rotate; and
a controller to adjust a position of the movable frame and a modulation or intensity characteristic of at least one of the radiation beams, to compensate at least in part for imbalance of or applied to the movable frame or imbalance of or applied to another movable frame.
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Abstract
An exposure apparatus including a projection system configured to project a plurality of radiation beams onto a target; a movable frame that is at least rotatable around an axis; and an actuator system configured to displace the movable frame to an axis away from an axis corresponding to the geometric center of the movable frame and to cause the frame to rotate around an axis through the center of mass of the frame.
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Citations
20 Claims
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1. An exposure apparatus, comprising:
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a projection system configured to project a plurality of radiation beams onto a target; a movable frame that is at least rotatable around an axis; an actuator system to cause the movable frame to rotate; and a controller to adjust a position of the movable frame and a modulation or intensity characteristic of at least one of the radiation beams, to compensate at least in part for imbalance of or applied to the movable frame or imbalance of or applied to another movable frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device manufacturing method comprising:
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projecting a plurality of radiation beams onto a target; rotating a movable frame around an axis using an actuator system; and adjusting a position of the frame to compensate at least in part for imbalance of or applied to the frame or imbalance of or applied to another movable frame, the adjusting the position of the movable frame comprising changing a phase angle of the movable frame. - View Dependent Claims (13, 20)
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14. An exposure apparatus, comprising:
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a projection system configured to project a plurality of radiation beams onto a target; a plurality of movable frames that are each at least rotatable around a respective axis and supported by a common frame; an actuator system to cause at least one of the movable frames to rotate; and a controller to adjust a position of the at least one movable frame to compensate at least in part for imbalance of or applied to the at least one movable frame or imbalance of or applied to another frame of the movable frames, such that a force that the at least one movable frame puts on the common frame in combination with force put on the common frame by the other movable frame leads to an effective cancellation of the forces. - View Dependent Claims (15, 16)
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17. An exposure apparatus, comprising:
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a projection system configured to project a plurality of radiation beams onto a target; a movable frame that is at least rotatable around an axis; an actuator system to cause the movable frame to rotate; and a controller to adjust a position of the movable frame to compensate at least in part for imbalance of or applied to the movable frame or imbalance of or applied to another movable frame, the adjustment of the position of the movable frame comprising a change in phase angle of the movable frame. - View Dependent Claims (18, 19)
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Specification