PROCESS FOR PRODUCING A REFLECTIVE OPTICAL ELEMENT FOR THE EXTREME ULTRAVIOLET WAVELENGTH RANGE AND REFLECTIVE OPTICAL ELEMENT
Production techniques of a reflective optical element for the extreme ultraviolet wavelength range having a multilayer system reflective coating arranged on a substrate. The multilayer system has mutually alternating layers of at least two different materials with different real parts of their refra...
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| description | Production techniques of a reflective optical element for the extreme ultraviolet wavelength range having a multilayer system reflective coating arranged on a substrate. The multilayer system has mutually alternating layers of at least two different materials with different real parts of their refractive indexes at a wavelength in the extreme ultraviolet wavelength range. A layer of one of the at least two materials forms a stack with the layer or layers arranged between the former and the closest layer of the same material with increasing distance from the substrate. At least one layer of the multilayer system is polished during or after deposition thereof, such roughness of the reflective optical element rises significantly less over all layers than in a corresponding reflective optical element with a reflective coating in the form of a multilayer system composed of unpolished layers. The multilayer system may have more than 50 layer stacks. |
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The multilayer system has mutually alternating layers of at least two different materials with different real parts of their refractive indexes at a wavelength in the extreme ultraviolet wavelength range. A layer of one of the at least two materials forms a stack with the layer or layers arranged between the former and the closest layer of the same material with increasing distance from the substrate. At least one layer of the multilayer system is polished during or after deposition thereof, such roughness of the reflective optical element rises significantly less over all layers than in a corresponding reflective optical element with a reflective coating in the form of a multilayer system composed of unpolished layers. 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| subjects | APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY DRESSING OR CONDITIONING OF ABRADING SURFACES ELECTROGRAPHY FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GAMMA RAY OR X-RAY MICROSCOPES GRINDING HOLOGRAPHY IRRADIATION DEVICES MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MATERIALS THEREFOR NUCLEAR ENGINEERING NUCLEAR PHYSICS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORIGINALS THEREFOR PERFORMING OPERATIONS PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS POLISHING TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR TRANSPORTING |
| title | PROCESS FOR PRODUCING A REFLECTIVE OPTICAL ELEMENT FOR THE EXTREME ULTRAVIOLET WAVELENGTH RANGE AND REFLECTIVE OPTICAL ELEMENT |
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