Inspection method and apparatus, lithographic apparatus, lithographic processing cell, and device manufacturing method to measure a property of a substrate
    7.
    发明授权
    Inspection method and apparatus, lithographic apparatus, lithographic processing cell, and device manufacturing method to measure a property of a substrate 失效
    检测方法和装置,光刻设备,光刻处理单元和测量基板性质的器件制造方法

    公开(公告)号:US08115926B2

    公开(公告)日:2012-02-14

    申请号:US12256780

    申请日:2008-10-23

    IPC分类号: G01J4/00

    摘要: A system is configured to measure two separately polarized beams upon diffraction from a substrate in order to determine properties of the substrate. Circularly or elliptically polarized light sources are passed via a fixed phase retarder in order to change the phase of one of two orthogonally polarized radiation beams with respect to the two beams. The relative phases of the two radiation beams and other features of the beams are measured in a detector to provide information on the properties of the substrate surface.

    摘要翻译: 系统被配置为在从基板衍射时测量两个分离的偏振光束,以便确定衬底的性质。 圆形或椭圆偏振光源通过固定相位延迟器传递,以改变相对于两个光束的两个正交偏振辐射束之一的相位。 在检测器中测量两个辐射束的相对相位和光束的其它特征以提供关于衬底表面的性质的信息。

    Inspection method and apparatus, lithographic apparatus, lithographic processing cell and device manufacturing method
    10.
    发明授权
    Inspection method and apparatus, lithographic apparatus, lithographic processing cell and device manufacturing method 有权
    检测方法和装置,光刻设备,光刻处理单元和器件制造方法

    公开(公告)号:US07701577B2

    公开(公告)日:2010-04-20

    申请号:US11708678

    申请日:2007-02-21

    IPC分类号: G01J4/00

    摘要: The present invention refers to the simultaneous measurement of four separately polarized beams upon diffraction from a substrate in order to determine properties of the substrate. Circularly or elliptically polarized light sources are passed via up to three polarizing elements. This polarizes the light sources by 0, 45, 90 and 135°. The plurality of polarizing beamsplitters replaces the use of a phase modulator, but enables the measurement of the intensity of all four beams and thus the measurement of the phase modulation and amplitude of the combined beams to give the features of the substrate.

    摘要翻译: 本发明涉及从衬底衍射时同时测量四个分离的偏振光束,以便确定衬底的性质。 圆形或椭圆偏振光源最多通过三个偏振元件。 这使光源偏振0°,45°,90°和135°。 多个偏振分束器取代了相位调制器的使用,但是能够测量所有四个光束的强度,从而测量组合光束的相位调制和幅度,以给出基板的特征。