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    • 76. 发明申请
    • Lithographic Apparatus and Method
    • 平版印刷设备和方法
    • US20080309899A1
    • 2008-12-18
    • US11763275
    • 2007-06-14
    • Johannes Jacobus Matheus BaselmansArno Jan Bleeker
    • Johannes Jacobus Matheus BaselmansArno Jan Bleeker
    • G03B27/68
    • G03F7/70291G03F7/706
    • Systems and methods are provided for measuring aberration in a lithographic apparatus. A radiation beam is modulated using an array of individually controllable elements, and the modulated beam is projected using a projection system. A pattern is provided on the array of individually controllable elements to modulate the radiation beam, and the pattern comprises a repeating structure that is formed from a plurality of features that are dimensioned such that first order diffraction of the radiation beam substantially fills the pupil of the projection system. A sensor detects the projected radiation and measures interference in the radiation projected by the projection system. Aberration in the detected radiation beam is then measured.
    • 提供了用于测量光刻设备中的像差的系统和方法。 使用单独可控元件的阵列来调制辐射束,并且使用投影系统投影调制束。 在单独可控元件的阵列上提供图案以调制辐射束,并且图案包括由多个特征形成的重复结构,其尺寸使得辐射束的一阶衍射基本上填充了辐射束的瞳孔 投影系统 传感器检测投射的辐射并测量由投影系统投射的辐射的干扰。 然后测量检测到的辐射束中的畸变。