Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus capable of supplying liquid with a high refractive index to a space between a final lens element and a substrate and reducing distortion of the substrate. SOLUTION: A burl plate for use in immersion lithography has a higher burl density in a peripheral portion than in a medial portion, so that even when a higher differential pressure is applied in the peripheral portion, the compression of the burls in the peripheral portion is substantially the same as in the medial portion. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To correct thermal inductive deformation of a wafer substrate in a lithography device. SOLUTION: A correction method includes a stage P204 where a pattern is exposed on a plurality of fields of a substrate according to prespecified exposure information P204 and stages P206 and P208 where properties of fields are measured and deformations of fields induced by thermal effect of exposure processing are evaluated. The present method further includes a stage to determine correction information based on measured properties and stage P210 where the prespecified exposure information is adjusted based on the correction information to compensate thermal inductive field deformation. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an exposure device capable of removing an immersion liquid in the edge of a substrate in immersion exposure. SOLUTION: A drain 10 is provided around an outer edge of a substrate W arranged such that a gap 15 exists between the substrate W and a substrate table WT. In this drain 10, the pressure of gas within a chamber 70 is maintained to be equal to the pressure of gas outside of the substrate table WT (i.e., the pressure of ambient gas.) This means the fact that, in a usual operation, substantially no gas flow which passes the gap 15 is present during a period when the gap 15 is not covered with a liquid supply system and one or more gas flow devices of the liquid supply system blow the gas away through the gap 15. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve the throughput of an exposure apparatus by increasing scanning speed in an immersion exposure apparatus. SOLUTION: A liquid supply system for supplying liquid between a projection system PL and a substrate is provided with a barrier member 12 for sealing the liquid, however, the relative speed between the barrier member 12 and the substrate can be reduced, thereby to increase the speed of the substrate relative to the projection system PL by forming the barrier member 12 so that the barrier member can move relatively to the projection system PL and independently of the substrate. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide lithography equipment and a device manufacturing method. SOLUTION: Lithography equipment has a substrate support formed such that it supports a substrate, and a projection system formed such that it projects a patterned radiation beam to a target part of the substrate. The substrate support is operated such that the substrate is moved along a specified path of the target part as the next target of the substrate. The substrate support has a duct fabric for thermally stabilizing the substrate. This duct fabric supplies a thermal stabilization medium to the substrate through the duct, and removes the thermal stabilization medium virtually using the duct from a portion of the substrate support that supports the target part via the substrate support part that supports the target part preceding the substrate, thereby maintaining the target part as a next target thermally stably. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a system for reducing lithographic errors caused by immersion liquid. SOLUTION: A lithography apparatus comprises an illumination system so constituted as to control a radiation beam, a support so constituted as to support a pattern forming device which imparts patterns on a crosssection of the radiation beam to form a patternized radiation beam, a substrate table so constituted as to hold a substrate, a projection system so constituted as to project the patternized radiation beam on the target of the substrate, a liquid supply system so constituted as to fill at least part of a space between a final element of the projection system and the substrate with the liquid, a sealing member so disposed as to substantially enclose the liquid inside the space between the final element of the projection system and the substrate, and an element for controlling and/or compensate evaporation of the immersion liquid from the substrate. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide lithography equipment capable of supplying a liquid having a high index of refraction to a space between a final lens element and a substrate and reducing distortion of the substrate. SOLUTION: The lithography equipment comprises a lighting system for providing a projection beam of radiation; a support structure for supporting a pattern forming device that gives a pattern to the cross-section of the projection beams; a substrate table for supporting the substrate, having a bur plate and a vacuum system for establishing a pressure difference across the entire substrate held by the bur plate, in which the pressure difference is larger at the circumferential part of the substrate than the central part; a projection system for projecting the pattern-formed beam onto the target part of the substrate; and a liquid supply system for supplying a liquid having a high index of refraction to a space between the final element of the projection system and the substrate held by the substrate table, wherein the density of the bur on the bur plate is higher at the circumferential part than the central part. COPYRIGHT: (C)2006,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 provide a method for exposing a structure on a substrate in non-rectangular region, such as a circumference of a region to be protected, in a shorter period. SOLUTION: While exposing a target portion of the substrate edge by scanning, a radiation is prevented from being exposed on the substrate table or its radiation is decreased, or a position of an edge of an illuminating field is changed so as to expose an L-shaped region. A thermal load on the substrate table can be decreased by this method, and a mouse bite can be filled into a dummy structure without overlapping with an alignment mark. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a system that reduces lithography errors caused by immersion liquid.SOLUTION: A lithographic apparatus comprises: an illumination system configured to adjust a radiation beam; a support body configured to support a pattern forming device capable of imparting a pattern to the radiation beam in a cross section of the radiation beam to form a pattern formed radiation beam; a substrate table configured to hold a substrate; a projection system configured to project the pattern formed radiation beam onto a target portion of the substrate; a liquid supply system configured to fill at least a part of 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 the immersion liquid from the substrate.