OPTICAL ELEMENT
    2.
    发明申请
    OPTICAL ELEMENT 审中-公开

    公开(公告)号:US20180196362A1

    公开(公告)日:2018-07-12

    申请号:US15912722

    申请日:2018-03-06

    IPC分类号: G03F7/20 G02B1/115

    摘要: In order to make possible both good laser resistance and good antireflection properties, an optical element, in particular for UV lithography, comprising a substrate and a coating on the substrate having at least four layers, is proposed, wherein a first layer comprising a low refractive index inorganic fluoride compound is arranged on the substrate, a layer comprising an inorganic oxide-containing compound is arranged as a layer the most distant from the substrate, and at least two further layers each comprising an inorganic fluoride compound or an inorganic oxide-containing compound are arranged alternately between the first and the most distant layers.