Abstract:
PROBLEM TO BE SOLVED: To enclose humid air in a lithography apparatus. SOLUTION: Liquid is supplied to a space between a final element of a projection system and a substrate. The leakage of the humid air into the other components of the projecting apparatus is prevented by a flow of gas toward a vacuum chamber, thereby preventing complicated components of the lithography apparatus from being damaged by the presence of the humid air. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus for eliminating vibrations caused by reaction forces applied on a base frame BF by acceleration in the apparatus without requiring a complex positioning device and a plurality of balance masses. SOLUTION: On the basis of information on the movement and acceleration of a substrate table WT and other components in an apparatus, a compensating force is applied on a base frame BF by an actuator 26 by using feedforward control (by a control device 25). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a mobile apparatus at a low cost usable even in the vacuum, controlling a first/second part moved high accurately relating to each other, positioning a mask holder relating to a projected beam in a lithograph projector, and in a manner of positioning a wafer table relating to the projected beam. SOLUTION: The mobile apparatus includes three-phase coil devices 1, 2, 3 of a first part, and a platen 7 of a second part. An AC current is supplied by a current supply 8 to the first/second coil devices 1, 2, 3. The platen 7 is arranged in a region where an induction field is generated when the current is supplied to the coil device. The coil device and the platen are arranged in such a manner that a magnetic field, generated in the platen when the current is allowed to flow in a coil, causes movement toward a first/second direction between the platen and the coil. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus intended to reduce liquid which remains on the surface of a substrate after exposure by a projection system. SOLUTION: In the lithographic apparatus, a local region on the surface of the substrate under a projection system PL is immersed in a liquid. The height of a liquid feed system 310 above the surface of a substrate W can be varied using an actuator 314. In a control system, the liquid feed system 310 is maintained at a predetermined height above the surface of the substrate W, using feedforward control or feedback control by inputting the height of the surface of the substrate W. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method for Y-direction position correction of masked object shifts caused by Z-direction offset and oblique lighting. SOLUTION: In a reflective lithographic projection apparatus, shifts of a mask pattern image in the scanning direction, which are caused by changes in the position of the mask pattern surface along the optical axis, are corrected by shifting the relative position(s) of the mask and/or a substrate in the scanning direction. Rotating the relative position(s) of the mask and/or the substrate around the optical axis can correct image rotation errors. After installing the mask in the lithographic projection apparatus, changes in the position of the mask pattern surface along the optical axis can be determined by using an interferometer. These changes can be mapped and stored to be used for controlling the lithographic projection apparatus. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithography projector in which a space between a substrate and a projection system is filled with liquid while minimizing the quantity of the liquid required to be accelerated during a stage operation. SOLUTION: In the lithography projector, the space between the final element of the projection system and the substrate table of the lithography projector is surrounded by a sealing member. A gas seal is formed between the sealing member and the plane of the substrate and the liquid is confined in that space. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing technique for manufacturing an optical element having a relief profile with which a reflective film can surely be deposited on a multilayered stack. SOLUTION: In this manufacturing technique, the relief profile is formed by selectively applying a plasma etching to a multilayered stack including alternative layers of a first material and a second material, which have relative etching selectivity. The relief profile is coated with the film such as a reflective coating film. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a radiation source in which an output level and a repeating speed that are suitable for production are realized. SOLUTION: The radiation source comprises an anode 220 and a cathode 210 that are configured and arranged to create a discharge in a gas or vapor in a space between the anode 220 and cathode 210 to form a plasma pinch so as to generate electromagnetic radiation. The gas or vapor may comprise xenon, indium, lithium, and tin. In order to improve heat dissipation, the radiation source LA comprises a plurality of plasma discharge elements 240, each of which is only used for short intervals, after which another discharge element is selected. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a projection system which realizes high positioning precision necessary for an EUV lithographic apparatus and does not need to cool a frame to which an optical element is fixed, and to perform predictive temperature compensation positioning control which is complicated and expensive. SOLUTION: In this lithographic projection apparatus, the projection system comprises a plurality of optical elements or sensors mounted on a frame. The frame is made of a glass ceramic material with a coefficient of thermal expansion of less than or approximately equal to 0.1×10 K thereby avoiding the need for expensive cooling system and/or predictive temperature compensation.
Abstract:
An adjustable diffraction grating comprises: an optical element and a distortion mechanism. The optical element has an optical surface for receiving an input radiation beam. The optical element is provided with a plurality of closed channels below the optical surface, above each closed channel the optical surface being formed from a membrane of material. The distortion mechanism comprises one or more actuators that are operable to distort the membranes over the closed channels so as to control the shape of the optical surface and to form a periodic structure on the optical surface which acts as a diffraction grating such that the input radiation beam is diffracted from the optical element to form a plurality of angularly separated sub-beams.