Stage assembly including a reaction assembly
First Claim
1. A stage assembly that moves a device along an X axis and along a Y axis, the stage assembly comprising:
- a device table that retains the device;
a mover assembly connected to the device table, the mover assembly moving along the X axis and the Y axis;
a first X reaction mass that is secured to the mover assembly;
a reaction base that supports the first X reaction mass and allows the first X reaction mass to move relative to the reaction base along the X axis;
a first Y reaction mass that is movable relative to the first X reaction mass; and
a first Y reaction mover connected to the first Y reaction mass, the first Y reaction mover moving relative to the reaction base and generates a Y correction force along the Y axis that is transferred to the reaction base.
1 Assignment
0 Petitions
Accused Products
Abstract
A stage assembly (10) for moving and positioning a device (26) is provided herein. The stage assembly (10) includes a stage base (12), a stage (14), a stage mover assembly (16), and a reaction assembly (18). The stage mover assembly (16) moves the stage (14) along an X axis and along a Y axis relative to the stage base (12). The reaction assembly (18) is coupled to the stage mover assembly (16). Uniquely, the reaction assembly (18) counteracts and reduces the reaction forces created by the stage mover assembly (16) in two degrees of freedom that are transferred to a reaction base (102). With this design, stage mover assembly (16) has less influence upon the position of the stage base (12). These features allow for more accurate positioning of the device (26) by the stage assembly (10) and better performance of the stage assembly (10).
35 Citations
40 Claims
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1. A stage assembly that moves a device along an X axis and along a Y axis, the stage assembly comprising:
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a device table that retains the device;
a mover assembly connected to the device table, the mover assembly moving along the X axis and the Y axis;
a first X reaction mass that is secured to the mover assembly;
a reaction base that supports the first X reaction mass and allows the first X reaction mass to move relative to the reaction base along the X axis;
a first Y reaction mass that is movable relative to the first X reaction mass; and
a first Y reaction mover connected to the first Y reaction mass, the first Y reaction mover moving relative to the reaction base and generates a Y correction force along the Y axis that is transferred to the reaction base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A stage assembly that moves a device along an X axis and along a Y axis, the stage assembly comprising:
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a device table that retains the device;
a mover assembly connected to the device table, the mover assembly moving the device table along the X axis and the Y axis;
a first X reaction mass that is secured to the mover assembly;
a second X reaction mass that is secured to the mover assembly;
a reaction base that supports the first X reaction mass and the second X reaction mass and allows the first X reaction mass and the second X reaction mass to move relative to the reaction base along the X axis;
a first Y reaction mass;
a first Y reaction mover connected to the first Y reaction mass, the first Y reaction mover moving the first Y reaction mass relative to the reaction base and generating a first Y correction force along the Y axis that is transferred to the reaction base;
a second Y reaction mass; and
a second Y reaction mover connected to the second Y reaction mass, the second Y reaction mover moving the second Y reaction mass relative to the reaction base and generating a second Y correction force along the Y axis that is transferred to the reaction base. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A stage assembly comprising:
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a stage that retains the device;
a stage base that supports the stage;
a mover assembly that includes a first component and a second component that is connected to the stage and interacts with the first component for causing a force between the first component and the second component, the mover assembly moving the stage with at least two degrees of freedom relative to the stage base and generating reaction forces in at least two degrees of freedom; and
a reaction assembly including a reaction base, a first reaction mass that is coupled to the first component of the mover assembly and movable along a first direction, and a second reaction mass that is movable independently from the first reaction mass along a second direction that is different from the first direction, the reaction assembly counteracting the reaction forces in at least two degrees of freedom that are transferred to the reaction base. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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Specification