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 in a movement plane including a first axis and a second axis orthogonal to each other, the method comprising:
- a measuring process in which positional information of the movable body in the movement plane is measured using at least one encoder of an encoder system including a plurality of encoders having a head that irradiates a detection light on a grating and receives the detection light from the grating; and
a switching process in which at least one of an encoder used for position control of the movable body is switched to another encoder so as to maintain a position of the movable body in the movement plane before and after the switching.
1 Assignment
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Accused Products
Abstract
During the drive of a stage, positional information in a movement plane of a stage is measured by three encoders that include at least one each of an X encoder and a Y encoder of an encoder system, and a controller switches an encoder used for a measurement of positional information of a stage in the movement plane from an encoder to an encoder so that the position of the stage in the movement plane is maintained before and after the switching. Therefore, although the switching of the encoder used for controlling the position of the stage is performed, the position of the stage in the movement plane is maintained before and after the switching, and a correct linkage becomes possible.
315 Citations
424 Claims
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1. A movable body drive method in which a movable body is driven in a movement plane including a first axis and a second axis orthogonal to each other, the method comprising:
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a measuring process in which positional information of the movable body in the movement plane is measured using at least one encoder of an encoder system including a plurality of encoders having a head that irradiates a detection light on a grating and receives the detection light from the grating; and
a switching process in which at least one of an encoder used for position control of the movable body is switched to another encoder so as to maintain a position of the movable body in the movement plane before and after the switching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 153, 154, 155)
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14-152. -152. (canceled)
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156. A movable body drive method in which a movable body is driven in a movement plane, the method comprising:
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an intake process in which measurement data corresponding to a detection signal of at least one head of an encoder system including a plurality of heads that measure positional information of the movable body within the movement plane is taken in at a predetermined control sampling interval when the movable body is driven in a predetermined direction in the movement plane; and
a drive process in which the movable body is driven so as to correct a measurement error of the head due to a measurement delay that accompanies propagation of the detection signal, based on a plurality of data which include the most recent measurement data that was taken in the latest and previous measurement data including at least data just before the most recent measurement data, and information of a delay time that accompanies propagation of the detection signal through a propagation path. - View Dependent Claims (157, 158, 159, 160, 161, 162, 163, 164, 165)
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166. An exposure method in which an object on a movable body that moves in a movement plane is sequentially exchanged, and a pattern is formed respectively on each object by sequentially exposing the object after exchange, wherein
each time the exchange of the object is performed on the movable body, position control of the movable body in the movement plane is started once more, using at least three encoders of an encoder system that measures positional information of the movable body in the movement plane within a predetermined effective area including an exposure position.
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173. A movable body drive method in which a movable body is driven in a movement plane, the method comprising:
an execution process in which of an encoder system including a plurality of encoders respectively having a head that irradiates a detection light on a grating and receives the detection light from the grating and measures positional information of the movable body in the movable plane, an output of each encoder is constantly taken in, and an operation of switching an encoder used for position control of the movable body from an encoder that has been used for position control of the movable body to another encoder, at a timing in synchronization with the position control of the movable body is executed.
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174. A movable body drive method in which a movable body is driven in a movement plane including a first axis and a second axis orthogonal to each other, the method comprising:
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a measuring process in which positional information of the movable body in the movement plane is measured using at least one encoder of an encoder system including a plurality of encoders respectively having a head that irradiates a detection light on a grating and receives the detection light from the grating;
a scheduling process in which a combination of encoders subject to a switching where an encoder used for position control of the movable body is switched from an arbitrary encoder to another encoder is made and a switching timing is prepared, based on a movement course of the movable body; and
a switching process in which the arbitrary encoder is switched to the another encoder based on the contents prepared in the scheduling. - View Dependent Claims (175, 176)
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177. A movable body drive system in which a movable body is driven in a movement plane including a first axis and a second axis orthogonal to each other, the system comprising:
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an encoder system having a plurality of encoders respectively having a head that irradiates a detection light on a grating and receives the detection light from the grating, including a first encoder used for measuring positional information of the movable body in a direction parallel to the first axis; and
a controller that measures positional information of the movable body in the movement plane using at least one encoder of the encoder system, and also switches at least one of an encoder used for measurement of the positional information of the movable body in the movement plane to another encoder so as to maintain a position of the movable body in the movement plane before and after the switching. - View Dependent Claims (178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192)
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193. A movable body drive system in which a movable body is driven in a movement plane, the system comprising:
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an encoder system including a plurality of heads that measure positional information of the movable body in the movement plane; and
a controller that takes in measurement data corresponding to a detection signal of at least one head of an encoder system at a predetermined control sampling interval when the movable body is driven in a predetermined direction in the movement plane, and drives the movable body so that the measurement error of the head due to a measurement delay that accompanies propagation of the detection signal is corrected, based on a plurality of data that include the most recent measurement data that was taken in the latest and previous measurement data including at least data just before the most recent measurement data, and information of a delay time that accompanies propagation of the detection signal through a propagation path. - View Dependent Claims (194, 195, 196, 197, 198, 199, 200, 201, 202)
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203. A movable body drive system in which a movable body is driven in a movement plane, the system comprising:
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an encoder system including a plurality of heads that measure positional information of the movable body in the movement plane;
an interferometer system that measures positional information of the movable body in the movement plane;
a processing unit that executes a delay time acquisition processing of driving the movable body in a predetermined direction, taking in a detection signal of each head and a detection signal of the interferometer system simultaneously at a predetermined sampling timing for a plurality of heads of the encoder system during the drive, and based on both detection signals, acquiring information of the delay time of the detection signals of the respective plurality of heads that accompanies the propagation through the propagation path, with the detection signal of the interferometer system serving as a reference; and
a controller that drives the movable body, based on measurement data corresponding to the respective detection signals of the plurality of heads of the encoder system and information of a delay time of the plurality of heads, respectively. - View Dependent Claims (204, 205)
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206. An exposure apparatus that sequentially exchanges an object on a movable body that moves in a movement plane, and forms a pattern respectively on each object by sequentially exposing the object after exchange, the apparatus comprising:
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an encoder system including at least three encoders that measure positional information of the movable body in the movement plane in a predetermined effective area including an exposure position; and
a controller that starts position control of the movable body in the movement plane using at least three encoders of the encoder system once more, each time exchange of the object is performed on the movable body. - View Dependent Claims (207, 208, 209, 210, 211)
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212. A movable body drive system in which a movable body is driven in a movement plane, the system comprising:
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an encoder system including a plurality of encoders respectively having a head that irradiates a detection light on a grating and receives the detection light from the grating and measures positional information of the movable body in the movable plane; and
a controller that constantly takes in an output of each encoder of the encoder system, and also executes an operation to switch the encoder used for control of the movable body from an encoder that has been used for position control of the movable body to another encoder in synchronization with the timing of the position control of the movable body. - View Dependent Claims (213, 214, 215)
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216. A movable body drive system in which a movable body is driven in a movement plane including a first axis and a second axis orthogonal to each other, the system comprising:
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an encoder system including a plurality of encoders having a head that irradiates a detection light on a grating and receives the detection light from the grating and measures positional information of the movable body in the movable plane; and
a controller that makes a combination of encoders subject to a switching where an encoder used for position control of the movable body is switched from an arbitrary encoder to another encoder and prepares a switching timing, based on a movement course of the movable body. - View Dependent Claims (217, 218, 219, 220, 221)
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222. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising:
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a movable body that holds the object and is movable at least in a first and second directions which are orthogonal in a predetermined plane;
an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit; and
a controller that decides the positional information which should be measured by a head after a switching, during the switching of the head used for the measurement that accompanies the movement of the movable body, based on positional information measured by a head before the switching and positional information of the movable body in a direction different from the first and second directions. - View Dependent Claims (223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255)
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256. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising:
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a movable body that holds the object and is movable at least in a first and second directions which are orthogonal in a predetermined plane;
an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit; and
a controller that continues the measurement while switching the head used for the measurement to another head during the movement of the movable body, and controls a position of the movable body in the predetermined plane, based on measurement information of the encoder system measured by the another head and positional information of the movable body in a direction different from the first and second directions on the switching. - View Dependent Claims (257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289)
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290. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising:
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a movable body that holds the object and is movable at least in a first and second directions which are orthogonal in a predetermined plane;
an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the first and second directions, and rotational direction in the predetermined plane is measured by at least three heads that face the grating section of a plurality of heads of the head unit; and
a controller that continues the measurement while switching the three heads used for the measurement to three heads having at least one different head during the movement of the movable body, and during the switching, decides position information that should be measured by at least one head of the three heads after the switching which are different from the three heads before the switching, based on positional information measured by the three heads before the switching. - View Dependent Claims (291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318)
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319. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising:
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a movable body that holds the object and is movable at least in a first and second directions which are orthogonal in a predetermined plane;
an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit; and
a controller that controls a position of the movable body in the predetermined plane, based on positional information of the head used for measuring the positional information in a surface parallel to the predetermined plane and measurement information of the encoder system.
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320. An exposure apparatus that exposes an object with an energy beam, the apparatus comprising:
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a movable body that holds the object and is movable at least in a first and second directions which are orthogonal in a predetermined plane;
an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit; and
a controller that measures positional information of the plurality of heads of the head unit in a surface parallel to the predetermined plane and controls a position of the movable body in the predetermined plane, based on positional information that has been measured and measurement information of the encoder system.
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321. An exposure method of exposing an object with an energy beam wherein
the object is mounted on a movable body that can move in at least a first and second direction which are orthogonal in a predetermined plane, whereby positional information of the movable body is measured using an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is mounted and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit, and the positional information which should be measured by a head after a switching during the switching of the head used for the measurement that accompanies the movement of the movable body is decided, based on positional information measured by a head before the switching and positional information of the movable body in a direction different from the first and second directions.
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356. An exposure method of exposing an object with an energy beam wherein
the object is mounted on a movable body that can move in at least a first and second direction which are orthogonal in a predetermined plane, whereby positional information of the movable body is measured using an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is mounted and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit, and the measurement is continued while switching the head used for the measurement to another head during the movement of the movable body, and a position of the movable body in the predetermined plane is controlled based on measurement information of the encoder system measured by the another head and positional information of the movable body in a direction different from the first and second directions on the switching.
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391. An exposure method of exposing an object with an energy beam wherein
the object is mounted on a movable body that can move in at least a first and second direction which are orthogonal in a predetermined plane, whereby positional information of the movement body is measured using an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body and which also measures positional information of the movable body in the first direction, the second direction, and rotational direction in the predetermined plane with at least three heads that face the grating section of a plurality of heads of the head unit, and the measurement is continued while switching the three heads used for the measurement to three heads having at least one different head during the movement of the movable body, and during the switching, position information that should be measured by at least one head of the three heads after the switching which are different from the three heads before the switching is decided, based on positional information measured by the three heads before the switching.
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421. An exposure method of exposing an object with an energy beam wherein
the object is mounted on a movable body that can move in at least a first and second direction which are orthogonal in a predetermined plane, whereby one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and the position of the movable body in the predetermined plane is controlled, based on measurement information of an encoder system that measures positional information of the movable body in the predetermined plane by a head that faces the grating section of a plurality of heads of the head unit, and positional information of the head used to measure the positional information in a surface parallel to the predetermined plane.
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423. An exposure method of exposing an object with an energy beam wherein
the object is mounted on a movable body that can move in at least a first and second direction which are orthogonal in a predetermined plane, whereby of an encoder system in which one of a grating section and a head unit is arranged on a surface of the movable body where the object is held and the other is arranged facing the surface of the movable body, and positional information of the movable body in the predetermined plane is measured by a head that faces the grating section of a plurality of heads of the head unit, the positional information of a plurality of heads of the head unit in a surface parallel to the predetermined plane is measured, and based on measured positional information and the measurement information of the encoder system, the position of the movable body in the predetermined plane is controlled.
Specification