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    • 5. 发明授权
    • 펄스 증배기를 갖는 엑시머 레이저
    • 펄스증배기를갖는엑시머레이저
    • KR100425861B1
    • 2004-04-03
    • KR1020017002844
    • 1999-08-18
    • 사이머 엘엘씨
    • 모튼리차드지.파틀로윌리엄엔.
    • H01S3/10
    • H01S3/0057H01S3/225
    • An excimer laser with optical pulse multiplication. A pulse multiplier optical system receives the laser output beam and produces a multiplier output beam having a larger number of pulses, each with substantially reduced intensity values as compared to the laser output beam. The present invention is particularly important as an improvement to the ArF excimer laser to reduce two-photon absorption damage to optical equipment in lithography machines. For damage mechanisms involving two-photon processes, such as the compaction and solarization of fused silica in the DUV spectral region, a factor of 4 reduction in peak power decreases the quantity of two photon absorption damage done by the synthesized 4-pulse burst by a factor of about 16 compared to delivering all of the energy in the single pulse emitted by the laser. This is a useful method of prolonging the lifetime of very expensive beam delivery systems such as those used in photolithography stepper systems without reducing the total dose available at the wafer. In preferred embodiments, the pulse multiplier system is contained in a module which can be pre-aligned and quickly installed on the excimer laser.
    • 具有光学脉冲倍增的准分子激光器。 脉冲倍增器光学系统接收激光输出光束并产生具有更多脉冲的倍增输出光束,与激光输出光束相比,每个光束的强度值都大幅降低。 本发明作为改进ArF准分子激光器以减少光刻机中光学设备的双光子吸收损伤是特别重要的。 对于涉及双光子过程的损伤机制,例如在DUV光谱区域中熔融石英的压实和日晒,峰值功率减少4倍减少由合成的4脉冲突发产生的双光子吸收损伤量 与在由激光器发射的单个脉冲中提供所有能量相比,约16倍。 这是延长非常昂贵的光束传输系统(例如在光刻步进系统中使用的光束传输系统的寿命)而不减少晶片上可用的总剂量的有用方法。 在优选实施例中,脉冲倍增系统包含在可以预先对准并快速安装在准分子激光器上的模块中。
    • 9. 发明公开
    • 라인 내로우잉 모듈
    • 线路延迟模块
    • KR1020070084624A
    • 2007-08-24
    • KR1020077012317
    • 2005-11-28
    • 사이머 엘엘씨
    • 알고트스마틴제이.버그스테트로버트에이.글레스피월터디.쿨게이코블라디미르에이.파틀로윌리엄엔.라일로프게르만이.샌드스트롬리차드엘.스트레이트브라이언디.다이어디모티에스.
    • H01S3/22
    • H01S3/1055G03F7/70025G03F7/70041H01S3/005H01S3/036H01S3/08H01S3/08004H01S3/08059H01S3/097H01S3/106H01S3/2251
    • A line narrowing method and module for a narrow band DUV high power high repetition rate gas discharge laser producing output laser light pulse beam pulses in bursts of pulses, the module having a nominal optical path are disclosed which may comprise: a dispersive center wavelength selection optic moveably mounted within an optical path of the line narrowing module, selecting at least one center wavelength for each pulse determined at least in part by the angle of incidence of the laser light pulse beam containing the respective pulse on the dispersive wavelength selection optic; a first tuning mechanism operative in part to select the angle of incidence of the laser light pulse beam containing the respective pulse upon the dispersive center wavelength selection optic, by selecting an angle of transmission of the laser light pulse beam containing the pulse toward the dispersive center wavelength selection optic; a second tuning mechanism operative in part to select the angle of incidence of the laser light pulse beam containing the respective pulse by changing the position of the dispersive center wavelength selection optic relative to the nominal optical path of the line narrowing module; wherein the second tuning mechanism coarsely selects a value for the center wavelength and the first tuning mechanism more finely selects the value for the center wavelength.
    • 一种用于窄带DUV大功率高重复率气体放电激光器的线窄化方法和模块,其产生具有标称光路的脉冲串中的输出激光束脉冲束脉冲,其可以包括:分散中心波长选择光学器件 可移动地安装在线路窄化模块的光路内,为至少部分地由分散波长选择光学器件上包含相应脉冲的激光束的入射角确定的每个脉冲选择至少一个中心波长; 第一调谐机构部分地通过选择包含脉冲朝向分散中心的激光束的透射角度来选择包含分散中心波长选择光学器件上的各个脉冲的激光束的入射角 波长选择光学; 第二调谐机构部分地通过改变色散中心波长选择光学器件相对于线条变窄模块的标称光路的位置来选择包含相应脉冲的激光束的入射角; 其中第二调谐机构粗略地选择中心波长的值,并且第一调谐机构更精细地选择中心波长的值。