Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus that enables accurate focus positioning of a substrate.SOLUTION: A lithographic apparatus includes: an illumination system configured to adjust a radiation beam; and a support medium constructed to support a patterning device capable of imparting the radiation beam with a pattern in its cross-section to form a patterned radiation beam. The lithographic apparatus further includes: a substrate table constructed to hold a substrate; a positioner constructed to position the substrate table; a projection system configured to project the patterned radiation beam onto a target portion of the substrate; a substrate surface actuator arranged to engage a part of a surface of the substrate facing the projection system; and a position controller configured to control a position of the substrate table and arranged to drive the positioner and the substrate surface actuator.
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion-type lithography projection device with improved functionality.SOLUTION: An immersion-type lithography projection device comprises: a radiation systems Ex, IL which are provided with a radiation source LA and supply projection beams PB of radiation; a first object table (mask table) MT connected to first positioning means for correctly positioning a mask with respect to a member PL; a second object table (substrate table) WT connected to second positioning means for correctly positioning a substrate with respect to the member PL; and a projection system PL for forming an image of a radiated part of the mask MA on a target part C of a substrate W.
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion-type lithographic projection apparatus with improved functionality.SOLUTION: The immersion-type lithographic projection apparatus comprises: a radiation system Ex which is provided with a radiation source LA and supplies a radiation projection beam PB; an illumination system IL; a first object table (mask table) MT connected to first positioning means for accurately positioning a mask to a member PL; a second object table (substrate table) WT connected to second positioning means for accurately positioning the substrate to the member PL; and a projection system PL for imaging an irradiated part of a mask MA on a target part C of a substrate W. This apparatus also includes at least one sensor that is disposed so as to be illuminated with a radiation projection beam that has passed through an immersion liquid.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved lithographic apparatus of which positional accuracy performance is advanced.SOLUTION: The lithographic apparatus includes: a support being moveable relative to a reference structure in a direction; a first position measurement system configured to provide a first measurement signal in a first frequency range, the first measurement signal representative of a position of the support relative to the reference structure in the direction; a second position measurement system configured to provide a second measurement signal in a second frequency range, the second measurement signal representative of the position of the support relative to the reference structure in the direction; and a processor configured to (a) filter the first measurement signal so as to attenuate a signal component having a frequency in the second frequency range, (b) filter the second measurement signal so as to attenuate a signal component having a frequency in the first frequency range, and (c) combine the filtered first measurement signal and the filtered second measurement signal into a combined measurement signal representative of the position of the support relative to the reference structure in the direction.
Abstract:
PROBLEM TO BE SOLVED: To provide a vibration isolation system for an imprint lithographic apparatus, capable of improving a throughput of an imprint lithographic apparatus. SOLUTION: An imprint lithographic apparatus 100 includes an actuator 130 displacing an imprint template holder 110 relative to a substrate holder 120. A support structure 140 of the imprint template holder 110 and/or the substrate holder 120 is attached to a vibration isolation system 150 attached to a base 160. The vibration isolation system 150 isolates vibration of the support structure 140 relative to the base 160. A control unit controlling the actuator 130 in an imprint process controls an adjusting member of the vibration isolation system 150, and adjusts a dynamic characteristic of the vibration isolation system 150 during at least part of the imprint process to reduce a displacement of the support structure 140 relative to the base 160, the displacement being caused by a force acting the support structure 140. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress the occurrence of vibrations or other disturbances which may act on a projection system of a lithographic apparatus (also referred to as a projection lens) by movements of a substrate stage, a patterning device stage (for example, a mask stage), a cooling device etc. SOLUTION: A projection system is mounted on a reference structure of a lithographic apparatus by an active lens mount. The active lens mount has a top part with a top surface 27 and a bottom part with a bottom surface 28. The top and bottom parts are interconnected by elastic structures 50 at both sides. Furthermore, the top and bottom parts are interconnected by a piezoelectric actuator-sensor combined body shown as 30, 40. By using a suitable electric signal, a required force acting between the top and bottom parts via the piezoelectric elements 30, 40 can be extracted. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To accurately align a projected image and a substrate. SOLUTION: When the substrate is scanned relative to the image in the lithographic apparatus, a scanning mechanism has coarse accuracy compared with precise patterns of the image to be exposed onto the substrate. In order to ensure that the image and the substrate are aligned at some point in time, an oscillation is imparted to a substrate table or a device that aligns the image, such as a mask table. An oscillation frequency is chosen corresponding to the maximum value of an alignment error. The frequency of a radiation pulse is adjusted so as to most accurately align the image and the substrate. The timing of the radiation pulse of the image may be adjusted so as to achieve accurate alignment when the oscillation is not imparted. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a combination of a structure of which attenuation performance in an active attenuation system is improved, and the active attenuation system. SOLUTION: The active attenuation system for attenuating vibration in at least one portion of the structure includes: a device for obtaining the amount of position of the structure; and an actuator for applying force to the structure depending on an obtained amount of position. In this case, the device calculates the amount of position of the structure based on an actuator signal. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus improved in the accuracy and/or the throughput of imaging. SOLUTION: This lithographic apparatus includes a projection system to project a patterned radiation beam to a substrate, and a damping system to damp the vibration of at least part of the projection system, the damping system including an interface damping mass and an active damping sub-system to damp the vibration of at least part of the interface damping mass, the interface damping mass connected to the projection system, and the active damping sub-system connected to the interface damping mass, the active damping sub-system including a sensor to measure a positional quantity of the interface damping mass and an actuator to exert a force on the interface damping mass based on a signal provided by the sensor. COPYRIGHT: (C)2009,JPO&INPIT