摘要:
A damping apparatus that supports and dampens a stage apparatus that positions and drives a stage to a target position is provided herein. The damping apparatus including a support plate part, a support force generating means, and a first controlling means. The support plate part supports the stage apparatus. The support force generating means exerts a damping action by applying a support force to the support plate part in the vertical directions. The first controlling means uses the acceleration of the stage, which is derived from a target track, to the target position, to control the support force generated by the support force generating means so as to compensate for forces that both occur as a result of the acceleration of the stage and cause the support plate part to tilt. The present invention controls vibration and the tilt of a base plate with high precision.
摘要:
A damping apparatus that supports and dampens a stage apparatus that positions and drives a stage to a target position is provided herein. The damping apparatus including a support plate part, a support force generating means, and a first controlling means. The support plate part supports the stage apparatus. The support force generating means exerts a damping action by applying a support force to the support plate part in the vertical directions. The first controlling means uses the acceleration of the stage, which is derived from a target track, to the target position, to control the support force generated by the support force generating means so as to compensate for forces that both occur as a result of the acceleration of the stage and cause the support plate part to tilt. The present invention controls vibration and the tilt of a base plate with high precision.
摘要:
A command trajectory drives a stage to produce a smooth motion while minimizing any vibrations or oscillations of the structure. The command trajectory provides an acceleration and a deceleration that have derivatives, known as the jerk, equal to zero at the beginning and end of the acceleration and deceleration periods. Because the jerk is equal to zero at the beginning and end of acceleration and deceleration, the influence of the reactive forces on the positioning system's structure is reduced, thereby minimizing oscillation of the structure. Moreover, the jerk is continuous throughout the acceleration and deceleration periods, resulting in a smooth continuous motion of the stage. The jerk on the stage during acceleration and deceleration has an adjustable duration to reduce the structural disturbances and decrease settling time.
摘要:
The present invention provides a scanning exposure apparatus for projecting an image of a pattern area of a mask having a first alignment mark onto a photosensitive substrate disposed on a substrate stage. A second alignment mark is provided on at least one of the photosensitive substrate and the substrate stage. The scanning exposure apparatus includes a plurality of projection optical systems disposed along a predetermined direction and adapted to receive the luminous fluxes passed through the mask and to project elected images of unchanged dimension of the plurality of illuminated regions of the mask onto the substrate. There is provided a mark detection system for detecting the first alignment mark on the mask and the second alignment mark, and at least one of the projection optical systems constitutes a part of the mark detection system.
摘要:
At a carriage that shows a resonance mode in opposite phase to a resonance mode shown by a plate table where an interferometer which measures a position (a first controlled variable) of a plate stage driven according to a control input is installed, another interferometer is installed which measures a position (the second controlled variable) of the plate stage. By using the interferometer and the another interferometer, it becomes possible to design a driving system robust in a high bandwidth that drives the plate stage.
摘要:
A high-precision scanning positioning system with magnification and orthogonality correction. A scanning position system, such as a microlithographic system, has a mask fine stage and a plate fine stage mounted on a coarse stage that moves at a constant velocity during exposure. By moving one fine stage relative to the other fine stage in the same or opposite direction of the scan during the exposure of the plate, an increase or decrease in magnification may be achieved. Likewise, by moving one fine stage relative to the other fine stage perpendicular to the direction of the scan during the exposure, a change in orthogonality may be achieved, and by rotating one fine stage relative to the other, correction of any rotation error may be achieved. A position control apparatus controls the motion of the fine stage relative to the other fine stage, such that the scanning position system can simultaneously correct synchronous error between the fine stages and reduce settling time while changing the magnification and orthogonality.
摘要:
A scanning exposure apparatus is arranged to illuminate a mask, to project an image of the mask through a projection optical system onto a photosensitive substrate, and to move the mask and the photosensitive substrate relative to the projection optical system, thereby effecting exposure of an entire surface of the mask on the photosensitive substrate, and the exposure apparatus comprises a position detector which detects a relative positional relation between the mask and the photosensitive substrate; a memory which stores positional information obtained by the position detector; a position correcting device which corrects the relative positional relation between the mask and the photosensitive substrate, based on the positional information read out from the memory device; and a controller which makes the position detector detect the relative positional relation between the mask and the photosensitive substrate while the mask and the photosensitive substrate are carried past a projection region of the projection optical system to an exposure start position, and makes the position correcting device correct the relative positional relation between the mask and the photosensitive substrate, based on the positional information read out from the memory, while the mask and the photosensitive substrate are stopped at the exposure start position and/or during the exposure.
摘要:
A stage device, usable in, e.g., an exposure apparatus, can include an inexpensive passive type vibration control pad system, while avoiding problems such as contact between stationary and movable parts and deterioration of stage control performance. The stage device includes a stage main body that moves on a base, and a support that is vibrationally isolated from the base. A movable part is disposed on the stage main body. A stationary part is supported by the support, the movable part moving relative to the stationary part. A detector detects a size of a gap between the movable part and the stationary part. An actuator adjusts a relative positional relationship between the movable part and the stationary part based on the detected gap size.
摘要:
A scanning exposure apparatus of the present invention is constructed in such an arrangement that while a mask and a substrate are moved relatively to a projection optical system, a pattern formed on the mask is projected for exposure through the projection optical system onto the substrate. The scanning exposure apparatus is provided with a leveling control portion for successively controlling an amount of relative inclination between the substrate and the mask with movement thereof, based on a predetermined leveling angle command .theta., so that an exposure area of the substrate becomes approximately coincident with an image plane of the pattern of the mask, a positional deviation measuring and control portion for measuring and controlling an amount of relative positional deviation between the mask and the substrate, and a positional deviation calculating and correcting portion for calculating an amount of relative positional deviation between the mask and the substrate, which will be caused by the control of the leveling control portion, based on the leveling angle command, and effecting correction of the relative positional deviation on the positional deviation measuring and control portion.
摘要:
A position control apparatus for synchronously controlling the movement of fine stages in a high-precision scanning positioning instrument. The position control apparatus uses actuators to adjust the fine stages with six degrees of freedom. By adjusting the fine stages, any synchronous errors between the fine stages during scanning may be dynamically corrected. Further, the fine stages may be adjusted during periods of acceleration and deceleration to reduce the settling time and consequently increasing throughput. Encoders directly attached to the actuators produce signals that are used in a velocity feedback loop. The locations of the fine stages are measured by interferometers. The position control apparatus uses a position control circuit to control the actuators to compensate for synchronous error.