摘要:
A positioning device for positioning an object that includes a first actuator and a connector arranged between the first actuator and the object. The connector includes a resilient member and a second actuator connected in series with the resilient member. The first actuator being constructed and arranged to exert a force in a first direction on the connector and the second actuator is controlled to maintain a distance between the first actuator and the object in the first direction substantially constant.
摘要:
In a lithographic apparatus the shape of the focal plane is adjusted using available manipulators in the projection lens system so that it is in closer conformity to the shape of the wafer surface in the exposure area. The control of the focal plane shape can be integrated with the leveling control which determines the height and tilt of the wafer surface.
摘要:
An imprint lithography apparatus includes an actuator configured to displace an imprint template holder relative to a substrate holder to perform an imprint process. The imprint template holder and/or the substrate holder being supported on a support structure, the support structure being mounted to a vibration isolation system that is mounted to a base of the apparatus. The vibration isolation system is configured to provide a vibration isolation of the support structure relative to the base. A control unit is configured to control the actuator during the imprint process. The control unit is arranged to control an adjustable member of the vibration isolation system to adjust a dynamical characteristic of the vibration isolation system during at least part of the imprint process so as to reduce a displacement of the support structure relative to the base due to a force exerted on the support structure during the imprint process.
摘要:
In a lithographic apparatus, a scanning mechanism is coarse compared with precise patterns to be exposed onto a substrate. In order to ensure that the image and the substrate are aligned at some point in time, an oscillation is imparted to either the substrate table, or to a device that aligns the image, such as a mask table. The oscillation frequency is chosen to compliment a maximum alignment error. The frequency of a radiation pulse is arranged to coincide with the image and the substrate being most accurately aligned. The radiation pulse of the image may be timed to coincide with the alignment without the use of the imparted oscillation.
摘要:
A method for damping an object in two or more degrees of freedom, including measuring a position quantity at each of the two or more measurement locations; extracting from the measured position quantities a measurement signal for each dynamic mode; feeding the measurement signal of a dynamic mode to a controller unit associated with the respective dynamic mode, the controller unit providing for each dynamic mode an output signal on the basis of the respective measurement signal; and providing a control signal to each of the two or more actuators, the control signal for each actuator being based on output signals of one or more controller units.
摘要:
A lithographic apparatus includes an illumination system configured to condition a radiation beam and a support constructed to support a patterning device, the patterning device being 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, the position controller being arranged to drive the positioner and the substrate surface actuator.
摘要:
A positioning system to position a table within a base frame of a lithographic apparatus, the positioning system including first and second actuators and a controller. The first actuator exerting an actuation force on the table. The first actuator being connected to a balance mass constructed and arranged to absorb a reaction force of the first actuator. The controller and second actuator constructed and arranged to exert a compensation force and/or torque to compensate a torque caused by the actuation force exerted by the first actuator on the balance mass.
摘要:
A lithographic apparatus is disclosed having a projection system housing supporting internally one or more lens elements, and a movement damper connected to the projection system housing, the movement damper configured to damp movement of the projection system housing at an eigenfrequency of at least one of the one or more lens elements and/or of the projection system housing.
摘要:
A lithographic projection apparatus is disclosed in which a space between the projection system and the substrate is filled with a liquid. An edge seal member at least partly surrounds the substrate or other object on a substrate table to prevent liquid loss when edge portions of the substrate or other object are, for example, imaged or illuminated.
摘要:
An imprint lithography apparatus includes an actuator configured to displace an imprint template holder relative to a substrate holder to perform an imprint process. The imprint template holder and/or the substrate holder being supported on a support structure, the support structure being mounted to a vibration isolation system that is mounted to a base of the apparatus. The vibration isolation system is configured to provide a vibration isolation of the support structure relative to the base. A control unit is configured to control the actuator during the imprint process. The control unit is arranged to control an adjustable member of the vibration isolation system to adjust a dynamical characteristic of the vibration isolation system during at least part of the imprint process so as to reduce a displacement of the support structure relative to the base due to a force exerted on the support structure during the imprint process.