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    • 4. 发明授权
    • Defect detection system
    • 缺陷检测系统
    • US06829047B2
    • 2004-12-07
    • US10061235
    • 2002-02-04
    • Tatsuya FujiiAyumu OnoyamaKoichi Sakurai
    • Tatsuya FujiiAyumu OnoyamaKoichi Sakurai
    • G01N2100
    • G01N21/95607G01N21/9501
    • A defect detection system to check any defect in the pattern to be checked by comparing a pattern to be checked with a reference pattern includes an edge detection means for detecting a pattern edge of the pattern to be checked by scanning a substrate by laser beams and detecting reflected light thereof. After the relative position between the substrate and the imaging means is adjusted so that the pattern edge of the pattern to be checked is substantially aligned with one side of CCD pixels, an image of the pattern to be checked is picked up. Therefore, the defect detection system corrects misalignment less than one pixel between a pattern to be checked and a reference pattern to prevent occurrence of a false defect.
    • 通过将待检查的图案与参考图案进行比较来检查要检查的图案中的任何缺陷的缺陷检测系统包括边缘检测装置,用于通过激光束扫描基板来检测要检查的图案的图案边缘,并且检测 反射光。 在调整基板和成像装置之间的相对位置使得要检查的图案的图案边缘基本上与CCD像素的一侧对准的情况下,拾取要检查的图案的图像。 因此,缺陷检测系统校正小于待检查图案与参考图案之间的一个像素的不对准,以防止发生假缺陷。