APPARATUS AND METHOD FOR CLEANING AN INSPECTION SYSTEM

    公开(公告)号:US20220205900A1

    公开(公告)日:2022-06-30

    申请号:US17563867

    申请日:2021-12-28

    摘要: A method and apparatus for cleaning vacuum ultraviolet (VUV) optics (e.g., one or more mirrors of a VUV) of a substrate inspection system is disclosed. The cleaning system ionizes or disassociates hydrogen gas in a VUV optics environment to generate hydrogen radicals (e.g., H*) or ions (e.g., H+, H2+, H3+, which remove water or hydrocarbons from the surface of the one or more mirrors. The one or more VUV mirrors may include a reflective material, such as aluminum. The one or more VUV mirrors may have a protective coating to protect the reflective material from any detrimental reaction to the hydrogen radicals or ions. The protective coating may include a noble metal.

    Radiation system and optical device

    公开(公告)号:US10359710B2

    公开(公告)日:2019-07-23

    申请号:US15766225

    申请日:2016-10-25

    IPC分类号: G03F7/20 H05G2/00 G21K1/06

    摘要: A radiation system comprises a fuel emitter configured to provide fuel to a plasma formation region, a laser arranged to provide a laser beam at the plasma formation region incident on the fuel to generate a radiation emitting plasma, and a reflective or transmissive device (30) arranged to receive radiation emitted by the plasma and to reflect or transmit at least some of the received radiation along a desired path, wherein the reflective or transmissive device comprises a body configured to reflect and/or transmit said at least some of the radiation, and selected secondary electron emission (SEE) material (34) arranged relative to the body such as to emit secondary electrons in response to the received radiation, thereby to clean material from a surface of the device.