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    • 4. 发明申请
    • A HIGH REPETITION RATE LASER PRODUCED PLASMA EUV LIGHT SOURCE
    • 高重复率激光器生产等离子体光源
    • WO2005089130A2
    • 2005-09-29
    • PCT/US2005007056
    • 2005-03-03
    • CYMER INCAKINS ROBERT PSANDSTROM RICHARD LPARTLO WILLIAM NFOMENKOV IGOR VSTEIGER THOMAS DALGOTS MARTIN JBOWERING NORBERT RJACQUES ROBERT NPALENSCHAT FREDERICK ASONG JUN
    • AKINS ROBERT PSANDSTROM RICHARD LPARTLO WILLIAM NFOMENKOV IGOR VSTEIGER THOMAS DALGOTS MARTIN JBOWERING NORBERT RJACQUES ROBERT NPALENSCHAT FREDERICK ASONG JUN
    • G01J1/00G03F7/20H01J65/04H05G2/00
    • B82Y10/00G03F7/70033H05G2/003H05G2/008
    • An EUV light source apparatus and method are disclosed, which may comprise a pulsed laser providing laser pulses at a selected pulse repetition rate focused at a desired target ignition site; a target formation system providing discrete targets at a selected interval coordinated with the laser pulse repetition rate; a target steering system intermediate the target formation system and the desired target ignition site; and a target tracking system providing information about the movement of target between the target formation system and the target steering system, enabling the target steering system to direct the target to the desired target ignition site. The target tracking system may provide information enabling the creation of a laser firing control signal, and may comprise a droplet detector comprising a collimated light source directed to intersect a point on a projected delivery path of the target, having a respective oppositely disposed light detector detecting the passage of the target through the respective point, or a detector comprising a linear array of a plurality of photo-sensitive elements aligned to a coordinate axis, the light from the light source intersecting a projected delivery path of the target, at least one of the which may comprise a plane-intercept detection device. The droplet detectors may comprise a plurality of droplet detectors each operating at a different light frequency, or a camera having a field of view and a two dimensional array of pixels imaging the field of view. The apparatus and method may comprise an electrostatic plasma containment apparatus providing an electric plasma confinement field at or near a target ignition site at the time of ignition, with the target tracking system providing a signal enabling control of the electrostatic plasma containment apparatus. The apparatus and method may comprise a vessel having and intermediate wall with a low pressure trap allowing passage of EUV light and maintaining a differential pressure across the low pressure trap. The apparatus and method may comprise a magnetic plasma confinement mechanism creating a magnetic field in the vicinity of the target ignition site to confine the plasma to the target ignition site, which may be pulsed and may be controlled using outputs from the target tracking system.
    • 公开了一种EUV光源装置和方法,其可以包括脉冲激光,其以所选择的脉冲重复频率提供激光脉冲,聚焦在期望的目标点火部位; 目标形成系统,以与激光脉冲重复率配合的选定间隔提供离散目标; 目标转向系统在目标地层系统和期望的目标点火站点之间; 以及目标跟踪系统,其提供关于目标形成系统和目标转向系统之间的目标移动的信息,使得目标转向系统能够将目标定向到期望的目标点火点。 目标跟踪系统可以提供能够创建激光点火控制信号的信息,并且可以包括液滴检测器,该液滴检测器包括指向与靶的投影传送路径上的点相交的准直光源,具有相应的相对设置的光检测器检测 目标通过相应点的通道,或包括与坐标轴对准的多个光敏元件的线性阵列的检测器,来自光源的光与目标的投影传送路径相交,至少一个 其可以包括平面截距检测装置。 液滴检测器可以包括以不同光频率操作的多个液滴检测器,或者具有视场的摄像机和成像视场的二维像素阵列。 该装置和方法可以包括静电等离子体容纳装置,其在点火时在目标点火点处或附近提供等离子体限制场,目标跟踪系统提供能够控制静电等离子体容纳装置的信号。 该装置和方法可以包括具有中间壁的容器和具有低压阱的容器,其允许EUV光通过并且保持横跨低压阱的压差。 该装置和方法可以包括磁性等离子体限制机构,其在目标点火点附近产生磁场,以将等离子体限制在目标点火位置,该目标点火点可以是脉冲的并且可以使用来自目标跟踪系统的输出进行控制。
    • 10. 发明申请
    • EUV LIGHT SOURCE
    • EUV光源
    • WO2005091879A2
    • 2005-10-06
    • PCT/US2005005935
    • 2005-02-24
    • CYMER INCPARTLO WILLIAM NBOWERING NORBERT RERSHOV ALEXANDER IFOMENKOV IGOR VOLIVER I ROGERVIATELLA JOHNJACQUES ROBERT N
    • PARTLO WILLIAM NBOWERING NORBERT RERSHOV ALEXANDER IFOMENKOV IGOR VOLIVER I ROGERVIATELLA JOHNJACQUES ROBERT N
    • G03F7/20G21K1/06H01J35/20H05G2/00
    • 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.
    • 公开了一种用于EUV光产生的装置和方法,其可以包括激光产生的等离子体(“LPP”)极紫外(“EUV”)光源控制系统,其包括适于递送移动等离子体引发靶的目标传送系统和EUV光收集 光学元件具有限定期望的等离子体起始位置的焦点,包括:目标跟踪和反馈系统,包括:至少一个成像装置,其提供目标流轨迹的图像作为输出,其中,所述目标流轨迹来自所述目标流轨迹的成像速度 摄像机太慢,不能成像形成被作为目标流轨迹成像的目标流的各个等离子体形成目标; 流轨迹误差检测器,从与期望的等离子体起始位置相交的期望的流轨道检测在大致垂直于目标流轨迹的至少一个轴上的目标流轨迹位置的误差。 至少一个目标交叉检测器可以瞄准目标轨道并且检测等离子体形成目标通过目标轨道中的选定点的通过。 驱动激光触发机构利用目标交叉检测器的输出来确定驱动激光触发的定时,以便驱动激光输出脉冲在等离子体引发目标处沿着目标轨道在一般最接近的等离子体起始位置处相交 接近所需的等离子体引发位点。 等离子体起始检测器可以瞄准目标轨道并且检测针对相应目标的等离子体起始位置沿着目标轨迹的位置。 中间焦点照明器可以照亮形成在中间焦点处的孔,以对至少一个成像装置中的孔进行成像。 所述至少一个成像装置可以是至少两个成像装置,每个成像装置基于对所述中间焦点的图像的图像的分析,提供与所述目标轨道与所述中间焦点的图像的垂直中心线轴线分离相关的误差信号 所述至少两个成像装置。 目标传送反馈和控制系统可以包括目标传送单元; 目标传送位移控制机构至少在对应于从第一成像装置中的图像的分析导出的第一位移误差信号的轴上移动目标传送机构,并且至少在与由第二位移误差信号 对第二成像装置中的图像进行分析。