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    • 1. 发明申请
    • EUV light source
    • US20050199829A1
    • 2005-09-15
    • US10900839
    • 2004-07-27
    • William PartloNorbert BoweringAlexander ErshovIgor FomenkovDavid MyersIan OliverJohn ViatellaRobert Jacques
    • William PartloNorbert BoweringAlexander ErshovIgor FomenkovDavid MyersIan OliverJohn ViatellaRobert Jacques
    • G03F7/20G21K1/06H01J35/20H05G2/00H01J65/04
    • G03F7/70033B82Y10/00G03F7/70175G03F7/70916G21K1/062G21K2201/061G21K2201/065G21K2201/067H05G2/003H05G2/005H05G2/006H05G2/008
    • An apparatus and method for EUV light production is disclosed which may comprise a laser produced plasma (“LPP”) extreme ultraviolet (“EUV”) light source control system comprising a target delivery system adapted to deliver moving plasma initiation targets and an EUV light collection optic having a focus defining a desired plasma initiation site, comprising: a target tracking and feedback system comprising: at least one imaging device providing as an output an image of a target stream track, wherein the target stream track results from the imaging speed of the camera being too slow to image individual plasma formation targets forming the target stream imaged as the target stream track; a stream track error detector detecting an error in the position of the target stream track in at least one axis generally perpendicular to the target stream track from a desired stream track intersecting the desired plasma initiation site. At least one target crossing detector may be aimed at the target track and detecting the passage of a plasma formation target through a selected point in the target track. A drive laser triggering mechanism utilizing an output of the target crossing detector to determine the timing of a drive laser trigger in order for a drive laser output pulse to intersect the plasma initiation target at a selected plasma initiation site along the target track at generally its closest approach to the desired plasma initiation site. A plasma initiation detector may be aimed at the target track and detecting the location along the target track of a plasma initiation site for a respective target. An intermediate focus illuminator may illuminate an aperture formed at the intermediate focus to image the aperture in the at least one imaging device. The at least one imaging device may be at least two imaging devices each providing an error signal related to the separation of the target track from the vertical centerline axis of the image of the intermediate focus based upon an analysis of the image in the respective one of the at least two imaging devices. A target delivery feedback and control system may comprise a target delivery unit; a target delivery displacement control mechanism displacing the target delivery mechanism at least in an axis corresponding to a first displacement error signal derived from the analysis of the image in the first imaging device and at least in an axis corresponding to a second displacement error signal derived from the analysis of the image in the second imaging device.
    • 9. 发明申请
    • LPP EUV drive laser input system
    • LPP EUV驱动激光输入系统
    • US20060289806A1
    • 2006-12-28
    • US11168785
    • 2005-06-28
    • Rodney SimmonsJohn ViatellaJerzy HoffmanR. WebbAlexander BykanovOleh Khodykin
    • Rodney SimmonsJohn ViatellaJerzy HoffmanR. WebbAlexander BykanovOleh Khodykin
    • G21G4/00
    • H05G2/001
    • A laser produced plasma (“LPP”) extreme ultraviolet (“EUV”) light source and method of operating same is disclosed which may comprise an EUV plasma production chamber having a chamber wall; a drive laser entrance window in the chamber wall; a drive laser entrance enclosure intermediate the entrance window and a plasma initiation site within the chamber and comprising an entrance enclosure distal end opening; at least one aperture plate intermediate the distal opening and the entrance window comprising at least one drive laser passage aperture. The at least one aperture plate may comprise at least two aperture plates comprising a first aperture plate and a second aperture plate defining an aperture plate interim space. The at least one drive laser aperture passage may comprise at least two drive laser aperture passages. The laser passage aperture may define an opening large enough to let the drive laser beam pass without attenuation and small enough to substantially reduce debris passing through the laser passage aperture in the direction of the entrance window.
    • 公开了一种激光产生的等离子体(“LPP”)极紫外(“EUV”)光源及其操作方法,其可以包括具有室壁的EUV等离子体生产室; 在室壁中的驱动激光入口窗口; 在入口窗口中间的驱动激光入口外壳和腔室内的等离子体起始位置,并且包括入口外壳远端开口; 在远端开口和入口窗之间的至少一个孔板包括至少一个驱动激光通道孔。 至少一个孔板可以包括至少两个孔板,其包括限定孔板中间空间的第一孔板和第二孔板。 至少一个驱动激光孔通道可以包括至少两个驱动激光孔通道。 激光通道孔可以限定足够大的开口,使得驱动激光束通过而不衰减,并且足够小以基本上减少通过入口窗口方向的穿过激光通道孔的碎屑。