Stage assembly with lightweight fine stage and low transmissibility
First Claim
1. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
- a first stage;
a first mover assembly that moves the first stage along the first axis;
a second stage that retains the work piece;
a second mover assembly that moves the second stage relative to the first stage along the first axis, along the second axis, and along the third axis, the second mover assembly including a Z mover that moves the second stage relative to the first stage along the third axis; and
a non-contact bearing that supports the mass of the second stage relative to the entire Z mover, the non-contact bearing allowing the second stage to move relative to the first stage along the first axis and along the second axis.
1 Assignment
0 Petitions
Accused Products
Abstract
A stage assembly (220) that moves a work piece (200) along a first axis, along a second axis and along a third axis includes a first stage (238), a first mover assembly (242) that moves the first stage (238) along the first axis, a second stage (240) that retains the work piece (200), a second mover assembly (244), and a non-contact bearing (257). The second mover assembly (244) moves the second stage (240) relative to the first stage (238) along the first axis, along the second axis, and along the third axis. The non-contact bearing (257) supports the mass of the second stage (240). Further, the non-contact bearing (257) allows the second stage (240) to move relative to the first stage (238) along the first axis and along the second axis. The second mover assembly (244) can move the second stage (240) with at least four degrees of movement.
41 Citations
51 Claims
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1. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis; a second stage that retains the work piece; a second mover assembly that moves the second stage relative to the first stage along the first axis, along the second axis, and along the third axis, the second mover assembly including a Z mover that moves the second stage relative to the first stage along the third axis; and a non-contact bearing that supports the mass of the second stage relative to the entire Z mover, the non-contact bearing allowing the second stage to move relative to the first stage along the first axis and along the second axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis and along the second axis; a second stage that retains the work piece; a second mover assembly including a Z mover that moves a Z mover output along the third axis and an X mover that moves the second stage along the first axis relative to the Z mover; and a non-contact bearing that supports the second stage relative to the Z mover output so that movement of the Z mover output along the third axis results in movement of the second stage along the third axis. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis and along the second axis; a second stage that retains the work piece; a second mover assembly including a Z mover having a first mover component, a second mover component that interacts with the first mover component to move the second stage relative to the first stage along the third axis, and a Z dampener that inhibits vibration from the first stage along the third axis from being transmitted to the second stage, the Z dampener inhibiting rotation of at least a portion of the Z mover about the third axis; and a non-contact bearing that supports the mass of the second stage relative to the Z mover, the non-contact bearing allowing the second stage to move relative to the first stage along the first axis and along the second axis. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. A stage device that positions a work piece along a first axis, along a second axis and along a third axis, the stage device comprising:
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a supporting member; a movable member that retains the work piece; a mover device that moves the movable member relative to the supporting member along the first axis, along the second axis, and along the third axis, the mover device having a first mover that has a first part connected to a first mover output and a second part that interacts with the first part to generate driving force and moves the first mover output relative to the supporting member along the third axis by using the driving force, the first and second parts of the first mover are connected to the supporting member; and a non-contact bearing that supports the mass of the movable member relative to the first mover output, the non-contact bearing allowing the movable member to move relative to the supporting member along the first axis and along the second axis. - View Dependent Claims (41, 42, 43, 44, 45)
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46. A positioning method for positioning a work piece along a first axis, along a second axis and along a third axis, the method comprising the steps of:
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providing a supporting member; retaining the work piece on a movable member; moving the movable member relative to the supporting member by a mover device along the first axis, along the second axis, and along the third axis, the mover device having a first mover that has a first part connected to a first mover output and a second part that interacts with the first part to generate driving force and moves the first mover output relative to the supporting member along the third axis by using the driving force, the first and second parts of the first mover are connected to the supporting member; and supporting the mass of the movable member relative to the first mover output by a non-contact bearing which allows the movable member to move relative to the supporting member along the first axis and along the second axis. - View Dependent Claims (47, 48)
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49. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis and along the second axis; a second stage that retains the work piece; and a second mover assembly including a Z mover having a first mover component, a second mover component that interacts with the first mover component to move the second stage relative to the first stage along the third axis, and a Z dampener that inhibits vibration from the first stage along the third axis from being transmitted to the second stage, the Z dampener inhibiting rotation of at least a portion of the Z mover about the third axis; and
wherein the Z mover includes a Z housing, a Z mover output, and a connector assembly that allows the Z mover output to tilt relative to the Z housing.
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50. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis and along the second axis; a second stage that retains the work piece; and a second mover assembly including a Z mover having a first mover component, a second mover component that interacts with the first mover component to move the second stage relative to the first stage along the third axis, and a Z dampener that inhibits vibration from the first stage along the third axis from being transmitted to the second stage, the Z dampener inhibiting rotation of at least a portion of the Z mover about the third axis; and
wherein the Z dampener supports the mass of the Z mover.
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51. A stage assembly that positions a work piece along a first axis, along a second axis and along a third axis, the stage assembly comprising:
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a first stage; a first mover assembly that moves the first stage along the first axis and along the second axis; a second stage that retains the work piece; and a second mover assembly including a Z mover having a first mover component, a second mover component that interacts with the first mover component to move the second stage relative to the first stage along the third axis, a Z beam that supports a portion of the second mover component, a Z frame that supports the first mover component, a Z bearing that guides the movement of the Z beam relative to the Z frame along the third axis and a Z dampener that inhibits vibration from the first stage along the third axis from being transmitted to the second stage, the Z dampener being secured to the Z beam and the Z frame, the Z dampener supporting the weight of the Z beam and allowing the Z beam to move relative to the Z frame, the Z dampener inhibiting rotation of at least a portion of the Z mover about the third axis.
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Specification