HIERARCHICAL CLUSTERING OF FOURIER TRANSFORM BASED LAYOUT PATTERNS

    公开(公告)号:WO2022229312A1

    公开(公告)日:2022-11-03

    申请号:PCT/EP2022/061319

    申请日:2022-04-28

    Abstract: Apparatuses, systems, and methods for grouping a plurality of patterns extracted from image data are disclosed. In some embodiments, the method for grouping the patterns comprises receiving the image data including the plurality of patterns that represent features to be formed on a portion of a wafer. The method also comprises separating the plurality of patterns after Fourier Transform into multiple sets of patterns. The method further comprises performing, to a respective set of patterns, a hierarchical clustering to obtain a plurality of subsets of patterns by recursively evaluating features related to similarity between patterns within the respective set of patterns.

    PROCESSING REFERENCE DATA FOR WAFER INSPECTION

    公开(公告)号:WO2021204739A1

    公开(公告)日:2021-10-14

    申请号:PCT/EP2021/058831

    申请日:2021-04-06

    Abstract: An improved apparatus and method for facilitating inspection of a wafer are disclosed. An improved method for facilitating inspection of a wafer comprises identifying a plurality of repeating patterns from reference image data associated with a layout design of the wafer. The method also comprises determining a pattern feature of one of the identified plurality of repeating patterns based on a change of a first characteristic of the reference image data. The method further comprises causing a first area of the wafer corresponding to the determined pattern feature to be evaluated.

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