ALIGNMENT STRATEGY OPTIMIZATION METHOD
    7.
    发明申请
    ALIGNMENT STRATEGY OPTIMIZATION METHOD 有权
    对齐策略优化方法

    公开(公告)号:US20060103822A1

    公开(公告)日:2006-05-18

    申请号:US10990335

    申请日:2004-11-17

    IPC分类号: G03B27/52

    CPC分类号: G03F7/70633 G03F9/7046

    摘要: The invention relates to a method of optimizing an alignment strategy for processing batches of substrates in a lithographic projection apparatus. First, all substrates in a plurality of batches of substrates in the lithographic projection apparatus are sequentially aligned and exposed using a predefined alignment strategy. Then, alignment data is determined for each substrate in the plurality of batches of substrates. Next, at least one substrate in each batch of substrates is selected to render a set of selected substrates comprising at least one substrate in each batch. In a metrology tool, overlay data for each of the selected substrates is determined. Then, overlay indicator values for a predefined overlay indicator are calculated for the predefined alignment strategy and for other possible alignment strategies. In this calculation, the alignment data and the overlay data of the selected substrates is used. Finally, an optimal alignment strategy is determined, the strategy being defined as alignment strategy among the predefined alignment strategy and the other possible alignment strategies with a lowest overlay indicator value.

    摘要翻译: 本发明涉及一种优化用于在光刻投影设备中处理批次的基板的对准策略的方法。 首先,光刻投影设备中的多批基板中的所有基板使用预定义的对准策略顺序对准和曝光。 然后,确定多批基板中的每个基板的对准数据。 接下来,选择每批衬底中的至少一个衬底,以在每批中提供包含至少一个衬底的一组选定衬底。 在计量工具中,确定每个所选择的基底的覆盖数据。 然后,为预定义的对齐策略和其他可能的对准策略计算预定义重叠指示符的覆盖指示符值。 在该计算中,使用所选择的基板的对准数据和覆盖数据。 最后,确定最佳对准策略,该策略被定义为预定义对准策略中的对准策略和具有最低覆盖指标值的其他可能的对准策略。