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    • 21. 发明授权
    • Illumination beam measurement
    • 照明光束测量
    • US07436502B2
    • 2008-10-14
    • US11236850
    • 2005-09-28
    • Johannes Jacobus Matheus BaselmansHenricus Jozef Peter LendersDilek Kaya
    • Johannes Jacobus Matheus BaselmansHenricus Jozef Peter LendersDilek Kaya
    • G01J1/00
    • G01J1/4257G01J1/04G01J1/0437G03F7/70133
    • A method of measuring the angular intensity distribution of an illumination beam produced by an illumination system of a lithographic apparatus includes measuring an angular intensity distribution, placing a first optical element above an object plane of the illumination system which causes light therefrom to be deflected in a first direction, and measuring the intensity distribution at said detector, placing a second optical element above said object plane which cases light from said illumination system to be deflected in a second direction, and measuring the intensity distribution at said detector, determining the change in intensity in said first and second directions, and the angular intensity distribution of said illumination beam from the measurements. There is also provided a mask for use in such a method, the mask comprising a plurality of modules, each module comprising a pinhole and an optical element mounted above the pinhole.
    • 测量由光刻设备的照明系统产生的照明光束的角度强度分布的方法包括测量角度强度分布,将第一光学元件放置在照明系统的物平面上方,从而使光从其偏转到 并且测量所述检测器处的​​强度分布,将第二光学元件放置在所述物平面之上,所述第二光学元件将来自所述照明系统的光沿第二方向偏转,并且测量所述检测器处的​​强度分布,确定强度变化 在所述第一和第二方向上,以及所述照明光束的所述测量的角度强度分布。 还提供了一种用于这种方法的掩模,该掩模包括多个模块,每个模块包括针孔和安装在针孔上方的光学元件。