Apparatus and methods of controlling surface charge and focus
    11.
    发明授权
    Apparatus and methods of controlling surface charge and focus 有权
    控制表面电荷和聚焦的装置和方法

    公开(公告)号:US06828571B1

    公开(公告)日:2004-12-07

    申请号:US10699708

    申请日:2003-11-03

    IPC分类号: H01L2100

    摘要: One embodiment disclosed relates to a method of setting a surface charge of an area on a substrate to a desired level. The substrate is held on a stage, and a stage bias voltage applied to the stage is controlled. A flood of electrons is directed to the area. The stage bias voltage is controlled such that the surface charge of the area reaches an equilibrium at the desired level. Another embodiment disclosed relates to a method of auto-focusing a main electron beam incident upon an imaging area of a substrate. A monitor electron beam is generated and directed towards a monitoring area of the substrate at a non-perpendicular incidence angle. An in-focus band in data collected from the monitor beam is detected. The focal length of an objective lens focusing the main beam is adjusted based upon a position of the in-focus band.

    摘要翻译: 公开的一个实施例涉及一种将衬底上的区域的表面电荷设置到期望水平的方法。 将基板保持在平台上,并且控制施加到载物台的载物台偏置电压。 大量的电子被引导到该地区。 阶段偏置电压被控制使得该区域的表面电荷达到期望水平的平衡。 公开的另一实施例涉及一种自动聚焦入射到基板的成像区域上的主电子束的方法。 产生监视电子束并以非垂直入射角朝向基板的监视区域。 检测从监视器束收集的数据中的对焦带。 聚焦主光束的物镜的焦距基于对焦带的位置进行调整。

    Filtered e-beam inspection and review
    12.
    发明授权
    Filtered e-beam inspection and review 有权
    过滤电子束检查和审查

    公开(公告)号:US06797955B1

    公开(公告)日:2004-09-28

    申请号:US10607224

    申请日:2003-06-26

    IPC分类号: H01J37147

    摘要: The disclosure relates to filtered e-beam inspection and review. One embodiment pertains to the filtered inspection or review of a specimen with a high aspect ratio feature. Advantageously, the energy and/or angular filtering improves the information retrievable relating to the high aspect ratio feature on the specimen. Another embodiment pertains to a method for energy-filtered electron beam inspection where a band-pass energy filtered image data is generated by determining the difference between a first high-pass energy-filtered image data set and a second high-pass energy-filtered image data set.

    摘要翻译: 本公开涉及过滤的电子束检查和审查。 一个实施例涉及具有高纵横比特征的样本的过滤检查或检查。 有利地,能量和/或角度滤波改善了与样本上的高纵横比特征有关的信息。 另一个实施例涉及一种用于能量过滤的电子束检查的方法,其中通过确定第一高通能量滤波图像数据集和第二高通能量滤波图像之间的差异来生成带通能量滤波图像数据 数据集。