Verfahren zum Herstellen eines diffraktiven optischen Elements

    公开(公告)号:DE102020108192A1

    公开(公告)日:2021-03-04

    申请号:DE102020108192

    申请日:2020-03-25

    Abstract: Die Erfindung betrifft ein Verfahren zum Herstellen eines diffraktiven optischen Elements (110, 320) mit einem Bereitstellen eines Substrats (104), wobei das Substrat (104) eine Basisschicht (100) und mindestens eine auf der Basisschicht (100) angeordnete Zusatzschicht (102) aufweist, wobei die Zusatzschicht (102) aus einem vorgebbaren Schichtmaterial gebildet ist, sowie einem Erzeugen von diffraktiven Strukturen (108) in mindestens in einer Zusatzschicht (102) des Substrats (108) durch abschnittsweise chemische Veränderung des Schichtmaterials. Die chemische Veränderung erfolgt derart, dass die Brechzahl des chemisch veränderten Schichtmaterials sich von der Brechzahl des chemisch unveränderten Schichtmaterials unterscheidet. Weiterhin betrifft die Erfindung ein diffraktives optisches Element (110, 320).

    19.
    发明专利
    未知

    公开(公告)号:AT544096T

    公开(公告)日:2012-02-15

    申请号:AT09169802

    申请日:2009-09-09

    Abstract: A radiation source for generation of extreme ultraviolet radiation or use in high resolution lithography includes a plasma formation site where fuel is contacted by a radiation beam to form a plasma (12) generating EUV radiation. A mirrored collector (10) collects and reflects the EUV radiation generated at a first focus towards a second focus (F2). A contamination barrier (20) is positioned such the periphery of the contamination barrier does not occlude more than 50% of the solid angle subtended by the mirror at the second focus, such that EUV radiation reflected by the collector mirror is not excessively attenuated by passing through the contamination barrier. The contamination barrier serves to trap fuel material such as ions, atoms, molecules or nanodroplets from the plasma to prevent their deposition onto the collector mirror where they reduce the mirror's effective lifetime. Gas extraction ports may be provided near the plasma formation site to suppress diffusion of fuel debris and contamination towards the collector mirror.

    ILLUMINATION SYSTEM, LITHOGRAPHIC APPARATUS AND METHOD OF FORMING AN ILLUMINATION MODE

    公开(公告)号:SG173857A1

    公开(公告)日:2011-09-29

    申请号:SG2011061553

    申请日:2010-02-25

    Abstract: Provided is an illumination system of a lithographic apparatus, the illumination system having a plurality of reflective elements arranged to receive radiation from a radiation source, the reflective elements being movable between different orientations. In the different orientations the reflective elements direct radiation towards different locations at a reflective component in a pupil plane of the illumination system, thereby forming different illumination modes. Each reflective element is moveable between a first orientation which directs radiation towards a first location the pupil plane and a second orientation which directs radiation towards a second location in the pupil plane, the first orientation and the second orientation of the reflective element being defined by end stops.

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