Lithographic apparatus, alignment system, and device manufacturing method
    1.
    发明申请
    Lithographic apparatus, alignment system, and device manufacturing method 审中-公开
    光刻设备,校准系统和器件制造方法

    公开(公告)号:US20060061743A1

    公开(公告)日:2006-03-23

    申请号:US10946334

    申请日:2004-09-22

    IPC分类号: G03B27/42

    CPC分类号: G03F9/7088 G03F9/7092

    摘要: A lithographic apparatus according to one embodiment includes an alignment system for aligning a substrate. The alignment system comprises an illuminator system configured to illuminate an alignment mark on the substrate with an illumination spot, the alignment mark comprising a plurality of lines and spaces. The system also includes a combiner system configured to transfer two-images of the illuminated alignment mark without spatial filtering of the images, rotate the images 180° relatively to each other, and combine the two images; and a detection system configured to detect an alignment signal from the combined images and to determine a unique alignment position by selecting a specific one of extreme values in the detected alignment signal.

    摘要翻译: 根据一个实施例的光刻设备包括用于对准衬底的对准系统。 对准系统包括照明器系统,其被配置为用照明点照射基板上的对准标记,该对准标记包括多个线和间隔。 该系统还包括一个组合器系统,配置成传递照明的对准标记的两个图像,而不对图像进行空间滤波,使图像相对于彼此旋转180度,并组合两个图像; 以及检测系统,被配置为检测来自组合图像的对准信号,并且通过选择检测到的对准信号中的特定值之一来确定唯一的对准位置。