Abstract:
PROBLEM TO BE SOLVED: To provide a method of preventing liquid for immersion lithography from relatively deeply entering under a substrate. SOLUTION: A method of helping to prevent liquid reaching under a substrate is disclosed. The method includes steps of: introducing a gas at a bottom edge of the substrate so that a buffer is created at the edge of the substrate; and helping to keep immersion liquid that is present at the top and edge of the substrate away from the lower surface of the substrate. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a hygrometry system which has full accuracy and measurement rate and can be used in a specific environment of lithographic application. SOLUTION: The hygrometry system used for applications is an example for lithographic apparatus. This system includes tunable a laser diode, designed so as to emit the measurement radiation beam, with a wavelength of a certain wavelength region. The wavelength region contains the first wavelength, relevant to the absorption peak of the water molecule. Signal processing unit is connected to an emission detector. The signal processing unit is designed so as to measure the intensity of the absorbed measurement radiation beam of the tunable laser diode. Also the signal processing unit is connected to the tunable laser diode so as to obtain wavelength information. The unit is designed so as to detect the extreme value of the measured intensity as a function of wavelength, while calculating the humidity value from the above the detected extreme value. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve compensation of cooling of a substrate due to evaporation of immersion liquid.SOLUTION: A substrate table assembly, an immersion lithographic apparatus and a device manufacturing method are disclosed. The substrate table assembly includes a substrate table to support a substrate; and a gas handling system to provide a gas to a region between the substrate table and a substrate mounted on the substrate table. The gas provided by the gas handling system has a thermal conductivity greater than or equal to 100 mW/(m K) at 298 K.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus including a position measurement system for accurately measuring a substrate table position.SOLUTION: The lithographic apparatus comprises: a substrate table position measurement system for measuring a substrate table position; and a projection system position measurement system for measuring a projection system position. The substrate table position measurement system comprises: a substrate table reference element mounted on the substrate table; and a first sensor head. The substrate table reference element extends in a measurement plane substantially parallel to a holding plane of a substrate on the substrate table. The holding plane is arranged at one side of the measurement plane and the first sensor head is arranged at an opposite side of the measurement plane. The projection system position measurement system includes one or more projection system reference elements and a sensor assembly. The sensor head and the sensor assembly or the associated projection system measurement elements are mounted on a sensor frame.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus in which liquid can be drained through a gap between, for example, an edge of an object and a substrate table on which the object is disposed.SOLUTION: A liquid immersion lithographic apparatus includes a drain configured to drain liquid through a gap between an edge of a substrate and a substrate table on which the substrate is supported. The drain comprises: means for feeding the liquid to the drain regardless of a position of the substrate table; and/or means for saturating gas in the drain. These means reduce fluctuation of heat loss due to evaporation of the liquid in the drain.
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion lithographic apparatus, in which temperature gradient in an immersion liquid is reduced or avoided.SOLUTION: An immersion lithographic apparatus, arranged in a space where one or a plurality of liquid flow dividers are enclosed by a liquid confinement structure, is disclosed. A function of the liquid flow dividers is to prevent formation of one or a plurality of recycle zones of an immersion liquid which often produce change in refractive index of the immersion liquid in the space, or consequently sometimes produce mapping error.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic process where a process error caused by one or more heat sources can be reduced or minimized. SOLUTION: An immersion lithographic apparatus is provided. The immersion lithographic apparatus has a substrate table including a drain so configured as to receive an immersion liquid leaking into a gap between the edge of a substrate on the substrate table and the edge of a concave portion where the substrate is disposed. By directing one or more jets of the liquid toward the back side of a portion that supports the substrate, at least a portion of the concave portion that supports the substrate is thermally adjusted, thus providing a thermal adjustment system in the immersion lithographic apparatus. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a seal member or a barrier member that reduces a turbulent flow and an overflow of immersion liquid in a liquid supply system for an immersion lithographic apparatus. SOLUTION: The immersion liquid is supplied into a seal member 12 through an inlet 128. The immersion liquid is pushed into orifices 121 that permit fluid communication between a first chamber 120 and a second chamber 122, causing a first pressure drop in the immersion liquid. The orifices 121 are individual holes prepared in a plate 123 separating the chambers 120 and 122, and the orifices 121 disperse a flow in a tangential direction over a plate 126 separating the chamber 122 from a space, ensuring a uniform flow over the width of the array of orifices 124. The orifices 124 are provided as a (regular) two-dimensional array in the plate 126 of the seal member 12. Thus uniform and parallel flows are generated in the space. COPYRIGHT: (C)2011,JPO&INPIT
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.
Abstract:
PROBLEM TO BE SOLVED: To reduce influence of a localized heat load when using immersion fluid in a lithographic apparatus.SOLUTION: A support table configured to support a substrate comprises a support section to support a substrate, and a regulation system to supply heat energy to and/or remove heat energy from the support section. The regulation system comprises a plurality of regulation units that are independently controllable.