Stage driving system
AssigneeCanon Kabushiki Kaisha
InventorsShinji Wakui, Mikio Sato, Katsumi Asada
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Abstract
A stage driving system capable of positioning an object with a higher speed and a higher precision than prior systems. The system includes a base member, plural movable members provided on the base member, and a controller for controlling the plural movable members so as to substantially suppress the vibration of the base member caused by the displacements of the plural movable members.
Claims10
A device comprising:
- a base member;
- a first movable member provided on said base member;
- a second movable member movable relative to said first movable member, provided on said first movable member;
- first detection means for detecting the acceleration of said first movable member;
- and
- control means for controlling the displacement of said second movable member by utilizing the acceleration information detected by said first detection means.
A device comprising:
- a base member;
- a first movable member provided on said base member;
- a second movable member movable relative to said first movable member, provided on said first movable member;
- first detection means for detecting the acceleration of said first movable member;
- and
- control means for controlling the displacement of said second movable member so as to reduce the time required for positioning said second movable member at a target position by utilizing the acceleration information detected by said first detection means.
A device comprising:
- a base member;
- a first movable member provided on said base member;
- a second movable member movable relative to said first movable member, provided on said first movable member;
- first detection means for detecting the acceleration of said base member;
- second detection means for detecting the acceleration of said first movable member;
- and
- control means for controlling the displacement of said first movable member in such a manner as to reduce the time required for positioning said first movable member at a target position by utilizing the acceleration information detected by said first detection means, and controlling the displacement of said second movable member so as to reduce the time required for positioning said second movable member at a target position, utilizing the acceleration information detected by said second detection means.
An exposure apparatus comprising:
- a base member;
- a damping device for supporting said base member;
- a first movable stage provided on said base member;
- a second movable stage movable relative to said first stage provided on said first movable stage, for supporting a substrate to be exposed;
- first detection means for detecting the acceleration of said first movable stage;
- and
- control means for controlling the displacement of said second movable stage so as to reduce the time required for positioning said second movable stage at a target position, utilizing the acceleration information detected by said first detection means.
An exposure apparatus comprising:
- a base member;
- a damping device for supporting said base member;
- a first movable stage provided on said base member;
- a second movable member provided on said first movable stage;
- first detection means for detecting the acceleration of said base member;
- second detection means for detecting the acceleration of said first movable member;
- and
- control means for controlling the displacement of said first movable stage so as to reduce the time required for positioning said first movable stage at a target position by utilizing the acceleration information detected by said first detection means, and controlling the displacement of said second movable stage so as to reduce the time required for positioning said second movable stage at a target position by utilizing the acceleration information detected by said second detection means.
A method for fabricating a device by placing a substrate to be exposed on a second movable stage, provided on a first movable stage positioned on a base member and exposing the substrate placed on the second movable stage comprising the steps of:
- controlling the displacement of the second movable stage so as to reduce the time required for positioning the second movable stage at a target position;
- and utilizing the acceleration information of the first movable stage to control displacement of said second movable stage in said controlling step.
A method for fabricating a device by placing a substrate to be exposed on a second movable stage, provided on a first movable stage positioned on a base member and exposing the substrate placed on the second movable stage, comprising the steps of:
- controlling the displacement of the second movable stage so as to reduce the time required for positioning the second movable stage at a target position by utilizing the acceleration information of the first movable stage;
- and
- controlling the displacement of the first movable stage so as to reduce the time required for positioning the first movable stage at a target position, utilizing the acceleration information of said base member.
Dependencies are inferred from the claim text.