Stage assembly including a reaction assembly that is connected by actuators
First Claim
1. A stage assembly that moves a device, the stage assembly comprising:
- a stage that retains the device;
a stage mover assembly connected to the stage, the stage mover assembly moving the stage along an X axis and along a Y axis and generating reaction forces along the X axis and along the Y axis; and
a reaction assembly coupled to the stage mover assembly, the reaction assembly including a reaction base assembly, a first reaction mass and a second reaction mass, each reaction mass moving independently relative to the reaction base assembly along the X axis and along the Y axis to reduce reaction forces along the X axis and along the Y axis.
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) reduces the reaction forces created by the stage mover assembly (16) in three degrees of freedom that are transferred to the stage base (12). As provided herein, the reaction assembly (18) includes a first reaction mass (88) and a second reaction mass (90) that move independently along the X axis, along the Y axis and about a Z axis. 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).
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Citations
35 Claims
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1. A stage assembly that moves a device, the stage assembly comprising:
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a stage that retains the device;
a stage mover assembly connected to the stage, the stage mover assembly moving the stage along an X axis and along a Y axis and generating reaction forces along the X axis and along the Y axis; and
a reaction assembly coupled to the stage mover assembly, the reaction assembly including a reaction base assembly, a first reaction mass and a second reaction mass, each reaction mass moving independently relative to the reaction base assembly along the X axis and along the Y axis to reduce reaction forces along the X axis and along the Y axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A stage assembly that moves a device, 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 and generating reaction forces in at least two degrees of freedom;
a first reaction mass secured to the mover assembly; and
a second reaction mass secured to the mover assembly, the second reaction mass moving with at least two degrees of freedom relative to the first reaction mass. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A stage assembly that moves a device, 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 and generating reaction forces with at least two degrees of freedom; and
a reaction assembly including a,first reaction mass coupled to the mover assembly, a second reaction mass coupled to the mover assembly, and a reaction base assembly that supports the first reaction mass and the second reaction mass, the first reaction mass moving with at least two degrees of freedom relative to the reaction base assembly and the second reaction mass moving with at least two degrees of freedom relative to the first reaction mass. - View Dependent Claims (31, 32, 33, 34, 35)
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Specification