Method and apparatus for generating radiation
    39.
    发明授权
    Method and apparatus for generating radiation 有权
    用于产生辐射的方法和装置

    公开(公告)号:US09442380B2

    公开(公告)日:2016-09-13

    申请号:US14439476

    申请日:2013-10-03

    CPC classification number: G03F7/70033 H05G2/003 H05G2/006 H05G2/008

    Abstract: A radiation source (e.g., LPP—laser produced plasma source) for generation of extreme UV (EUV) radiation has at least two fuel particle streams having different trajectories. Each stream is directed to cross the path of an excitation (laser) beam focused at a plasma formation region, but the trajectories are spaced apart at the plasma formation region, and the streams phased, so that only one stream has a fuel particle in the plasma formation region at any time, and so that when a fuel particle from one stream is generating plasma and EUV radiation at the plasma generation region, other fuel particles are sufficiently spaced so as to be substantially unaffected by the plasma. The arrangement permits potential doubling of the radiation intensity achievable for a particular fuel particle size.

    Abstract translation: 用于产生极端UV(EUV)辐射的辐射源(例如,LPP激光产生的等离子体源)具有至少两个具有不同轨迹的燃料粒子流。 每个流被引导以跨过等离子体形成区域聚焦的激发(激光)束的路径,但是轨迹在等离子体形成区域处被间隔开,并且流被相位化,使得仅一条流在 等离子体形成区域,并且使得当来自一个流的燃料粒子在等离子体产生区域产生等离子体和EUV辐射时,其它燃料颗粒被充分间隔开,以致基本上不受等离子体的影响。 该布置允许对于特定燃料粒子尺寸可实现的辐射强度的潜在加倍。

    Lithographic Apparatus
    40.
    发明申请
    Lithographic Apparatus 审中-公开
    平版印刷设备

    公开(公告)号:US20150286145A1

    公开(公告)日:2015-10-08

    申请号:US14438482

    申请日:2013-09-23

    Abstract: A radiation source for a lithographic apparatus uses a plurality of fiber lasers to ignite a fuel droplet at an ignition location to generate EUV radiation. The fiber lasers may be provided to emit parallel to an optical axis and a telescopic optical system is provided to focus the lasers at the ignition location, or the lasers may be directed towards the optical axis with a final focus lens being used to reduce beam waist. The lasers may be provided in two or more groups to allow them to be independently controlled and some of the lasers may be focused at a different location to provide a pre-pulse. Radiation from fiber lasers may also be combined using dichroic mirrors.

    Abstract translation: 用于光刻设备的辐射源使用多个光纤激光器在点火位置点燃燃料液滴以产生EUV辐射。 可以将光纤激光器设置成平行于光轴发射,并且提供伸缩光学系统以将激光器聚焦在点火位置,或者激光器可以被引导到光轴,最终聚焦透镜用于减小光束腰部 。 激光器可以以两个或更多个组提供,以允许它们被独立控制,并且一些激光器可以聚焦在不同的位置以提供预脉冲。 光纤激光器的辐射也可以使用二向色镜来组合。

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