Abstract:
The invention relates to a vibration isolator (VI), comprising: a base (10); a coupling element (20) to be coupled to a vibration sensitive object; a decoupling mass (30); a first vibration isolator part (31) arranged between the base (10) and the decoupling mass (30); and a second vibration isolator part (40) arranged between the decoupling mass (30) and the coupling element (20), and wherein at least one of the first and second vibration isolator part comprises a pneumatic isolator.
Abstract:
The invention relates to a vibration isolation system to support a structure on a basis. The vibration isolation system being provided with a low frequency support. The vibration isolation system comprises: a force sensor to provide a force signal representative of the force; an internal force actuator for applying an internal force in parallel to the force; and, an internal force controller operably connected to the force sensor and the internal force actuator and the internal force controller is configured to control the internal force actuator on the basis of the force signal.
Abstract:
An actuator (51) comprises: coil assemblies (60) arranged in an array, wherein each coil assembly defines a core chamber (61) having a core chamber height (61d); and at least one magnetic member (62) that extends partly along the core chamber height of the core chamber of a corresponding at least one coil assembly, wherein the at least one magnetic member is made of a magnetic material. At least one of a shape of the at least one magnetic member, a size of the at least one magnetic member, a position of the at least one magnetic member and the magnetic material of the at least one magnetic member may be selected so as to control one or more parameters of the actuator.
Abstract:
A method of modifying a lithographic apparatus comprising an illumination system for providing a radiation beam, a support structure for supporting a patterning device to impart the radiation beam with a pattern in its cross-section, a first lens for projecting the radiation beam at the patterning device with a first magnification, a substrate table for holding a substrate, and a first projection system for projecting the patterned radiation beam at a target portion of the substrate with a second magnification. The first lens and the first projection system together provide a third magnification. The method comprises reducing by a first factor the first magnification to provide a second lens for projecting the radiation beam with a fourth magnification; and increasing by the first factor the second magnification to provide a second projection system for projecting the patterned radiation beam at the target portion of the substrate with a fifth magnification.
Abstract:
An object positioning system includes an object (P); a measurement system (MS) for measuring the position (APOS) of the object; an actuator system (AS) for positioning the object; a control system (CU, OBS) configured to drive the actuator system, wherein each sensor of the measurement system has an associated measurement area on the object, wherein a location of at least one measurement area on the object is dependent on the position of the object, wherein the control system (CU, OBS) comprises an observer (OBS) with a dynamic model of the object to estimate an internal dynamic behavior (IDB) of the object, wherein the dynamic model includes the dependency of the location of at least one measurement area on the position of the object, and wherein the control system (CU, OBS) is configured to drive the actuator system (AS) in dependency of an output (IDB) of the observer (OBS) as well.
Abstract:
A masking device (200) for use in an immersion lithographic apparatus. The masking device comprising a blade assembly (250.1, 250.2) configured to limit a width (260) of a cross-section (270) of a radiation beam in a direction substantially perpendicular to a scanning direction. The blade assembly is further configured to adjust, during exposure of a target portion comprising a substrate edge, the width of the cross-section of the radiation beam, thereby reducing a radiation dose of the substrate edge to a value less than a nominal radiation dose of the target portion.
Abstract:
A lithographic apparatus includes a patterning device support constructed to support a patterning device (5), the patterning device being capable of imparting a radiation beam with a pattern in its cross-section to form a patterned radiation beam, the patterning device support including a moveable structure (3) movably arranged with respect to an object, a patterning device holder (4) movably arranged with respect to the movable structure and configured to hold the patterning device, an actuator (8) configured to move the movable structure (3) with respect to the object, and an ultra short stroke actuator (9) configured to move the patterning device holder (4) with respect to the movable structure (3); a substrate support (WT) constructed to hold a substrate (W); and a projection system (PS) configured to project the patterned radiation beam onto a target portion (C) of the substrate, a position measurement system (IF) for measuring a substrate positional error (e WS ) which is a difference between a desired position (SP WS ) of the substrate relative to a reference object and an actual position of the substrate relative to the reference object; and a controller (100, 200) configured to move the actuator (8) and the ultra short stroke actuator (9) at least partly on the basis of the substrate positional error (e WS ).
Abstract:
There is provided a charged particle apparatus comprising: a particle beam generator, optics, a first and a second positioning device, both configured for positioning the substrate relative to the particle beam generator along its optical axis, and a controller configured for switching between a first operational mode and a second operational mode. The apparatus is configured, when operating in the first operational mode, for irradiating the substrate by the particle beam at a first landing energy of the particle beam and, when operating in the second operational mode, for irradiating the substrate at a second, different landing energy. When operating in the first operational mode, the second positioning device is configured to position the substrate relative to the particle beam generator at a first focus position of the particle beam and in the second operational mode, to position the substrate at a second, different focus position.
Abstract:
The invention relates to an electronic system for an accelerometer having a piezoelectric element and a first mechanical resonance frequency, comprising: a) a damping circuit configured to: - receive an acceleration signal from the piezoelectric element; - electronically dampen an amplitude of the first mechanical resonance frequency; and - generate a damped acceleration signal, b) an extender configured to: - receive the damped acceleration signal; - extend the frequency response; and - output an extended damped acceleration signal, wherein the extender is configured to have a first electronic anti-resonance frequency matching the damped first mechanical resonance frequency, and to have a frequency response between the first electronic anti-resonance frequency and a higher second frequency that is substantially opposite to a corresponding frequency response of the combination of the accelerometer and the damping circuit.
Abstract:
A lithographic apparatus comprises a projection system comprising position sensors to measure a position of optical elements of the projection system. The positions sensors are referenced to a sensor frame. Damping actuators damp vibrations of the sensor frame. A control device drives the actuators and is configured to derive sensor frame damping force signals from at least one of the acceleration signals and the sensor frame position signals, derive an estimated line of sight error from the position signals, determine actuator drive signals from the sensor frame damping force signals and the estimated line of sight error, drive the actuators using the actuator drive signals to dampen the sensor frame and to at least partly compensate the estimated line of sight error.