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    • 30. 发明授权
    • Method for pattern inspection and apparatus therefor
    • 图案检查方法及其设备
    • US5301248A
    • 1994-04-05
    • US904892
    • 1992-06-25
    • Ninomiya TakanoriKazushi YoshimuraMineo Nomoto
    • Ninomiya TakanoriKazushi YoshimuraMineo Nomoto
    • G01R31/308G06T7/00G06K9/00
    • G06T7/001G01R31/308G06T7/0006G06T2207/20036G06T2207/20144G06T2207/30141
    • A detected pattern is binarized, the binarized pattern is expanded, an image size is reduced while a connectivity of the expanded pattern is preserved and stored in a first memory. In turn, the binarized pattern is contracted, the image size is reduced while a connectivity of the contracted pattern is preserved and stored in a second memory. Then the expanded pattern is read out from the first memory and a connectivity of the pattern is selected. The contracted pattern is read out from the second pattern and the connectivity of the pattern is extracted. The selected connectivities are compared with the connectivity of a normal pattern to detect a non-coincidence. The circuit pattern having a short circuit or a semi-short circuit defect and a circuit pattern having an open circuit or a semi-open circuit defect are classified and selected in response to these non-coincidences. Further, a pattern shape stored in the first memory is analyzed to specify the position where the short circuit or a semi-short circuit defect is present.
    • 检测到的图案被二值化,二值化图案被扩展,图像尺寸减小,而扩展图案的连接被保存并存储在第一存储器中。 反过来,二进制图案被缩小,图像尺寸减小,而合同图案的连接被保存并存储在第二存储器中。 然后,从第一存储器读出扩展模式,并且选择模式的连接。 从第二模式读出收缩模式,并提取模式的连接。 将所选择的连接性与正常模式的连接进行比较以检测不重合。 具有短路或半短路缺陷的电路图案以及具有开路或半开路缺陷的电路图案被分类并响应于这些非重合而选择。 此外,分析存储在第一存储器中的图案形状以指定存在短路或半短路缺陷的位置。