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Stage assembly including a reaction assembly that is connected by actuators

  • US 6,603,531 B1
  • Filed: 11/16/2000
  • Issued: 08/05/2003
  • Est. Priority Date: 11/16/2000
  • Status: Expired due to Fees
First Claim
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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.

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