Abstract:
PROBLEM TO BE SOLVED: To dispense with an actuator for accurately positioning, without deteriorating accuracy in positioning of an actuator driven assembly. SOLUTION: In order to obtain a high acceleration and high traveling speed of a pattern support or a substrate table of a lithography apparatus, one of the pattern support and the substrate table is supported by an actuator for relatively larger displacement, and the actuator for accurately positioning is dispensed with. The other of the pattern support and the substrate table is supported by the actuator assembly including the actuator for accurately positioning and the actuator for relatively larger displacement. By providing a control system adapted to align the other of the pattern support and the substrate table, so that the positioning error of one of the pattern support and the substrate table is compensated by the positioning of the other, a positioning accuracy of the pattern forming apparatus and the substrate is achieved. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithography device using a method for lowering sensitivity of a position control unit for movable objects in the lithography device in order to suppress disturbance influence on the position control unit. SOLUTION: The position control unit has a position controller (6), an object expressed as an object filter (Ho), a position feedback circuit (22) and acceleration control equipment (34). The acceleration control equipment (34) has a subtractor (8), the first filter (Hf) in the first circuit branch, and the second filter (Hs) in the second circuit branch. While signal (Fp) outputted from the position controller is inputted to the subtractor (8), the disturbance force (Fd) is inputted directly to the object (Ho). The first transfer function (G1) relating to the first position controller force (Fp) is different from the second transfer function (G2) relating to the disturbance force (Fd). The first transfer function (G1) is the same as transfer function relating to the position controller force (Fp) in case that there is no acceleration control equipment (34). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion type lithography projection apparatus with improved functionality. SOLUTION: The highlights of this invention are that the lithography apparatus is equipped with a radiation system Ex to provide the projection beams PB of radiation including a radioactive source LA, a primary object table (mask table) MT connected to a primary positioning means to correctly position a mask against IL and a member PL, a secondary object table (substrate table) WT connected to a secondary positioning means to correctly position a substrate against the member PL, and a projection system PL to form an image of the irradiated part of the mask MA on the target part of the substrate W. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To disclose a lithography projector in which a space between the final element of a projection system and a substrate is filled with liquid. SOLUTION: Hermetic edge sealing members 17 and 117 surround a substrate W on a substrate table WT or another object at least partially thus preventing the catastrophic loss of the liquid when the edge part of the substrate is imaged or illuminated. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus, a device-manufacturing method, and a device that is manufactured by the method. SOLUTION: A control system for a mask table (patterning means) and substrate tables predicts the instantaneous position error in the substrate table, and feeds the position error to a control loop of the mask table for adding to the mask table set point as force to be operated on the mask table.
Abstract:
PROBLEM TO BE SOLVED: To further improve control of a substrate table of a lithographic apparatus, for example.SOLUTION: A lithographic apparatus includes a projection system, a substrate table, a plurality of sensors, at least one actuator, and a controller. The projection system is configured to project a patterned beam of radiation onto a substrate. The substrate table is configured to support the substrate and to move relative to the projection system. The plurality of sensors are configured to measure a deformation of the substrate table. The at least one actuator is configured to deform the substrate table. The controller is configured to control the actuator to deform the substrate table on the basis of measurements made by the sensors. The plurality of sensors are located on a first side of the substrate table opposite to a second side of the substrate table facing the projection system. The plurality of sensors are substantially stationary relative to the projection system.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus having an improved positioning accuracy of a stage thereof. SOLUTION: A lithographic apparatus includes: a stage that holds an object and is movable relative to a reference structure within a motion range; a magnet structure that provides a spatially varying magnetic field in at least a part of the motion range and is movable relative to the reference structure and the stage; a first position measuring system to provide a first measurement signal corresponding to a position of the stage and/or the object in a measuring direction relative to the reference structure; a second position measuring system to provide a second measurement signal corresponding to a position of the stage relative to the magnet structure; and a data processor that corrects the first measurement signal with a value dependent on the second measurement signal to provide a first corrected measurement signal representing the position of the stage and/or the object in the measuring direction relative to the reference structure. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce lithographIC errors. SOLUTION: The variations in the position of a substrate, in a direction substantially parallel to the propagation direction of the radiation beam being projected, or to be projected on the substrate, is determined as conditions where lithographic error can occur, when a pattern is projected on the substrate by using the radiation beam. In order to reduce the lithographic error, the nature of radiation beam is controlled, when the radiation beam is projected on the substrate, or while in the course of being projected by utilizing the variations in the position of the substrate. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion type lithography projection apparatus with improved functionality. SOLUTION: The lithography projection apparatus includes: a radiation system Ex, IL also equipped with a radiation source LA, for providing the projection beams PB of radiation; a first object table (mask table) MT connected to a first positioning means, for correctly positioning a mask with respect to a member PL; a second object table (substrate table) WT connected to a second positioning means, for correctly positioning a substrate with respect to the member PL; and a projection system PL for forming an image of the radiated part of the mask MA on the target part C of the substrate W. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a patterning device support that leads to improvement in overlays. SOLUTION: Lithographic apparatus includes a position controller for selectively pressurizing, at least one of sides of a patterning device M to control the position of the patterning device M in its planar direction. The position controller includes a gas supply section and one or a plurality of outflow openings directed to the side of the gas pressure supply section, to apply a pressurized gas to at least one side of the patterning device to control the position of the patterning device, in its planar direction in a non-contact manner. COPYRIGHT: (C)2010,JPO&INPIT