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    • 5. 发明申请
    • METHOD OF CONTROLLING LASER APPARATUS AND LASER APPARATUS
    • 控制激光装置和激光装置的方法
    • US20150188274A1
    • 2015-07-02
    • US14579698
    • 2014-12-22
    • Osamu WakabayashiHiroaki TsushimaKouji Kakizaki
    • Osamu WakabayashiHiroaki TsushimaKouji Kakizaki
    • H01S3/00H01S3/10H01S3/034H01S3/134H01S3/225H01S3/036
    • H01S3/0014H01S3/034H01S3/036H01S3/10069H01S3/134H01S3/225H01S3/2251H01S3/2256H01S3/2258
    • A method of controlling a laser apparatus may include: exchanging a gain medium in a chamber configured to output a laser beam by exciting the gain medium; first measuring, after the exchanging, pulse energy of a laser beam which is oscillated in the chamber under a specific gas pressure and a specific charge voltage; calculating an approximate expression indicating a relationship between the pulse energy of the laser beam and the gas pressure in the chamber and the charge voltage, or a table representing a correlationship between the pulse energy, the gas pressure and the charge voltage, based on the specific pressure, the specific charge voltage and the pulse energy in the first measuring; storing the approximate expression or the table; second measuring, after the first measuring, pulse energy Er of a laser beam oscillated in the chamber; calculating pulse energy Eec which is supposed to be obtained directly after the exchanging under the gas pressure and the charge voltage in the second measuring based on the approximate expression or the table; calculating a reduction amount ΔEd of pulse energy based on the pulse energy Eec and the pulse energy Er using ΔEd=Eec−Er; and calculating a partial gas exchange amount Q for partial gas exchange in the chamber based on the reduction amount ΔEd of pulse energy.
    • 控制激光装置的方法可以包括:在配置成通过激励增益介质输出激光束的腔室中交换增益介质; 在交换之后,首先测量在特定气体压力和特定充电电压下在腔室中振荡的激光束的脉冲能量; 计算表示激光束的脉冲能量与腔室中的气体压力与充电电压之间的关系的近似表达式,或表示脉冲能量,气体压力和充电电压之间的相关性的表格, 压力,第一次测量中的具体充电电压和脉冲能量; 存储近似表达式或表格; 在第一次测量之后,第二次测量激光束的脉冲能量Er在腔室中振荡; 基于近似表达式或表格,计算在气体压力下的交换和第二测量中的充电电压之间直接获得的脉冲能量Eec; 使用&Dgr; Ed = Eec-Er计算基于脉冲能量Eec和脉冲能量Er的脉冲能量的减少量&Dgr; Ed; 并且基于脉冲能量的减少量&Dgr; Ed计算腔室中部分气体交换的部分气体交换量Q。
    • 10. 发明授权
    • Extreme ultraviolet light generation apparatus
    • 极紫外光发生装置
    • US08710474B2
    • 2014-04-29
    • US13532365
    • 2012-06-25
    • Takeshi KodamaOsamu Wakabayashi
    • Takeshi KodamaOsamu Wakabayashi
    • G21K5/00G01K5/00B41C3/02
    • H05G2/008H05G2/006
    • An apparatus used with an external laser apparatus for generating extreme ultraviolet light includes a target storage unit for storing a target material, a nozzle unit having a through-hole in communication with the interior of the storage unit through which the target material is outputted, an electrode having a through-hole facing the nozzle unit, and a target detector for detecting a target formed of the target material and outputting a detection signal. A direct current voltage adjuster applies and adjusts a direct current between the target material and the electrode, a pressure adjuster applies and adjusts a pressure to the target material through gas, and a controller controls at least one of the direct current voltage adjuster and the pressure adjuster based on the detection signal from the target detector.
    • 与用于产生极紫外光的外部激光装置一起使用的装置包括用于存储目标材料的目标存储单元,具有与被输送目标材料的存储单元的内部连通的通孔的喷嘴单元, 电极,其具有面向喷嘴单元的通孔,以及目标检测器,用于检测由目标材料形成的目标并输出检测信号。 直流电压调节器施加并调节目标材料和电极之间的直流电流,压力调节器通过气体施加和调节对目标材料的压力,并且控制器控制至少一个直流电压调节器和压力 基于来自目标检测器的检测信号的调节器。