Abstract:
PROBLEM TO BE SOLVED: To provide a position control system for a lithographic device in which an accuracy of positioning a target portion with respect to a lens column or a projection system may be improved. SOLUTION: The position control system for a substrate support of a lithographic device includes a position measurement system constructed to specify a position of a sensor or a sensor target on the substrate support, a controller constructed to provide a control signal based on a desired position of a target portion of the substrate and the specified position, and one or more actuators constructed to act on the substrate support. The position control system includes a stiffness compensation model of the substrate support, which includes a relation between a difference in a change in a position of the target portion and a change in position of the sensor or sensor target, as a result of a force exerted on the substrate support. The position control system is constructed to substantially correct the position of the target portion using the stiffness compensation model at least during projection of a patterned radiation beam on the target portion. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide immersion lithography equipment suitable for preventing or reducing generation of bubbles by preventing bubbles from leaking to a radiation beam passage through one or more gaps in a substrate table, or by extracting bubbles possibly generated in the gap. SOLUTION: The lithography equipment is configured to project a desired pattern image on a substrate W held on a substrate table WT through liquid; in the surface of the substrate table, a gap 22 exists between the substrate table and the outer edge of the substrate, or between the substrate table and other component which comes in contact with the liquid during normal use; and a bubble holding device configured to hold bubbles 24 possibly generated in the gap is provided in the gap. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic projection apparatus which minimizes a liquid loss from a supply system during the exposure of ends of a substrate, in liquid immersion exposure. SOLUTION: Liquid is limited by a middle plate 210 located between the liquid supply system and the substrate W. Spaces 222, 215 among the middle plate 210, a transmitted image sensor (TIS) 220, and the substrate W are also filled with the liquid 111. This procedure can be performed by two separated space liquid-supply systems via holes 230, 240, or can be performed by the same space liquid-supply system via the holes 230, 240. Therefore, both the space 215 between the substrate W and the middle plate 210, and the space 225 between the transmitted image sensor 220 and the middle plate 210 are filled with the liquid, so that both the substrate W and the transmitted image sensor can be illuminated under the same condition. A part 200 provides one or a plurality of support surfaces with the middle plate 210 which can be held at a predetermined position by a vacuum source. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce generation of bubbles in immersion liquid and to reduce evaporation of immersion liquid. SOLUTION: Liquid immersion lithography equipment is provided with a liquid confinement structure for defining a space arranged to contain liquid between a projection system and a substrate at least partially. In order to decrease crossing of the edge of a substrate for forming an image (which may cause inclusion of bubbles in immersion liquid), cross-sectional area of the space is minimized in a plane parallel with the substrate. Minimum theoretical size is the size of a target portion where an image is formed by the projection system. In one embodiment, profile of a final element in the projection system is altered to have the size and/or profile similar to that of the target portion in the cross-section parallel with the substrate. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus capable of moving a substrate in a different direction without switching the direction of a liquid flowing between a projection system of the lithographic apparatus and the substrate, in the lithography apparatus having a liquid supplying system. SOLUTION: This lithographic apparatus has an input port for supplying the liquid to a space between the projection system of the lithography apparatus and the substrate, and an output port for removing at least one part of the liquid. The lithographic apparatus has a liquid supplying system for rotating any one or both of the input port and output port around an axis line substantially perpendicular to an exposure plane of the substrate. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus having a liquid supply system, wherein a substrate can be moved in different directions without switching a direction of a liquid flowing between a projection system of the lithographic apparatus and the substrate. SOLUTION: The immersion lithographic apparatus includes a liquid supply system which has an inlet configured to supply the liquid to a space between the projection system of the lithographic apparatus and the substrate and an outlet configured to remove at least a part of the liquid and is configured to rotate the inlet, the outlet, or both of them about an axis substantially perpendicular to an exposure plane of the substrate. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a system reducing lithography errors arising from the immersion liquid. SOLUTION: A lithographic apparatus includes: an illumination system configured to condition a radiation beam; a support constructed to support a patterning device, the patterning device being capable of imparting the radiation beam with a pattern to its cross-section to form a patterned radiation beam; a substrate table constructed to hold a substrate; a projection system configured to project the patterned radiation beam onto a target portion of the substrate; a liquid supply system configured to at least partly fill a space between a final element of the projection system and the substrate with liquid; a seal member arranged to substantially contain the liquid within the space between the final element of the projection system and the substrate; and elements to control and/or compensate for evaporation of immersion liquid from the substrate. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent or reduce the occurrence of residual liquid on the substrate and/or substrate table after the exposure of a substrate, in an immersion type lithographic apparatus. SOLUTION: In immersion lithography, after the exposure of a substrate is completed, a detector is used for detecting residual liquid that remains on the substrate and/or substrate table. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To disclose and provide an apparatus that is equipped with a substrate table for supporting substrate. SOLUTION: A supporting table includes a plurality of supporting protrusions, coming into contact with a substrate when used to support the substrate. This support table includes a plurality of heat transfer protrusions, extending toward the substrate without making contact with the substrate, when the substrate is supported by the supporting protrusions during use. A heat exchange gap, containing a gas for exchanging heat with the substrate, extends between the heat transfer protrusions and the substrate. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for cleaning the inside of an immersion lithographic apparatus. SOLUTION: A cleaning fluid can be introduced into a space between a projection system and a substrate table of the lithographic apparatus by especially using a liquid supply system of the lithographic apparatus. Additionally or alternatively, a cleaning device may be provided on the substrate table, and an ultrasonic emitter may be provided to create an ultrasonic liquid. COPYRIGHT: (C)2008,JPO&INPIT