Movable body drive method and movable body drive system, pattern formation method and apparatus, exposure method and apparatus, and device manufacturing method
First Claim
1. A movable body drive method in which a movable body is driven substantially along a two-dimensional plane, the method comprising:
- a first process in which positional information of the movable body related to at least one of a direction perpendicular to the two-dimensional plane and a tilt direction with respect to the two-dimensional plane is detected, using a first detection device that has one, or more than one detection positions placed in at least a part of an operating area of the movable body, and detects positional information of the movable body in the direction perpendicular to the two-dimensional plane using detection information detected when the movable body is positioned at any one of the detection points, and a second detection device that detects positional information of the movable body in the direction perpendicular to the two-dimensional plane from measurement results using a measurement beam irradiated along the two-dimensional plane between the outside of the operating area of the movable body and the movable body, and the movable body is driven in at least one of the direction perpendicular to the two-dimensional plane and the tilt direction with respect to the two-dimensional plane based on detection results of the first detection device;
a second process in which relation information between a first positional information of the movable body computed from detection information of the first detection device and a second positional information of the movable body computed from detection in formation of the second detection device is updated at every predetermined timing; and
a third process in which when abnormality occurring in an output of the first detection device has been detected, the detection device used for drive control of the movable body in at least one of the direction perpendicular to the two-dimensional plane and the tilt direction with respect to the two-dimensional plane is switched from the first detection device to the second detection device.
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Accused Products
Abstract
Positional information of a wafer stage in a Z-axis direction and a tilt direction with respect to the XY plane (for example, a θy direction) is measured, using a surface position measurement system, such as, for example, a Z head and the like, and the wafer stage is driven based on the measurement results.
At the same time, positional information of the wafer stage is measured using an interferometer system such as, for example, a Z interferometer. When abnormality of the surface position measurement system is detected or when the wafer stage moves off from a measurement area of the surface position measurement system, drive control is switched to a drive control based on the measurement results of the interferometer system. Accordingly, the wafer stage can be driven continuously even at the time of abnormality generation in the surface position measurement system.
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Citations
27 Claims
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1. A movable body drive method in which a movable body is driven substantially along a two-dimensional plane, the method comprising:
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a first process in which positional information of the movable body related to at least one of a direction perpendicular to the two-dimensional plane and a tilt direction with respect to the two-dimensional plane is detected, using a first detection device that has one, or more than one detection positions placed in at least a part of an operating area of the movable body, and detects positional information of the movable body in the direction perpendicular to the two-dimensional plane using detection information detected when the movable body is positioned at any one of the detection points, and a second detection device that detects positional information of the movable body in the direction perpendicular to the two-dimensional plane from measurement results using a measurement beam irradiated along the two-dimensional plane between the outside of the operating area of the movable body and the movable body, and the movable body is driven in at least one of the direction perpendicular to the two-dimensional plane and the tilt direction with respect to the two-dimensional plane based on detection results of the first detection device; a second process in which relation information between a first positional information of the movable body computed from detection information of the first detection device and a second positional information of the movable body computed from detection in formation of the second detection device is updated at every predetermined timing; and a third process in which when abnormality occurring in an output of the first detection device has been detected, the detection device used for drive control of the movable body in at least one of the direction perpendicular to the two-dimensional plane and the tilt direction with respect to the two-dimensional plane is switched from the first detection device to the second detection device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A movable body drive system in which a movable body is driven substantially along a two-dimensional plane, the system comprising:
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a first detection device that has ones or more than one detection positions placed in at least a part of an operating area of the movable body, and detects positional information of the movable body in a direction perpendicular to the two-dimensional plane using detection information detected when the movable body is positioned at any one of the detection points; a second detection device that detects positional information of the movable body in the direction perpendicular to the two-dimensional plane from measurement results using a measurement beam irradiated along the two-dimensional plane between the outside of the operating area of the movable body and the movable body; and a controller that drives the movable body at least one of a direction perpendicular to the two-dimensional plane and a tilt direction with respect to the two-dimensional plane based on detection results of the first detection device, and also updates relation information between a first positional information of the movable body computed from detection information of the first detection device and a second positional information of the movable body computed from detection information of the second detection device at every predetermined timing, and when abnormality occurring in the output of the first detection device is detected, switches a detection device used for drive control of at least one of the direction perpendicular to the two-dimensional plane and a tilt direction with respect to the two-dimensional plane from the first detection device to the second detection device. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification