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    • 7. 发明申请
    • Inspection apparatus and an inspection method
    • 检验仪器和检验方法
    • US20080099675A1
    • 2008-05-01
    • US11976965
    • 2007-10-30
    • Takashi HiroiHiroshi MiyaiHirokazu ItoMichio Nakano
    • Takashi HiroiHiroshi MiyaiHirokazu ItoMichio Nakano
    • G21K5/04
    • G06T7/001G06T2200/24G06T2207/10061G06T2207/30148H01J2237/2817
    • An inspection apparatus includes an irradiation optical system for irradiating an inspection target with an electron beam, a scanning unit for scanning an irradiation position in the X direction and the Y direction, an electrification control electrode for controlling secondary electrons or reflected electrons generated on the inspection target by the irradiation with the electron beam, a sensor for detecting the secondary electrons or the reflected electrons, an A/D converter for sequentially converting the signals into digital image signals from an irradiation start point-in-time of the electron beam, an addition circuit for creating a detection image by adding the digital image signals from a first set point-in-time to a second set point-in-time on each pixel basis, and an image processing circuit for judging a defect by comparing the detection image with a reference image of a circuit pattern formed on the inspection target.
    • 一种检查装置,包括:用于用电子束照射检查对象的照射光学系统,用于扫描X方向和Y方向的照射位置的扫描单元,用于控制在检查中产生的二次电子或反射电子的带电控制电极 通过用电子束照射的目标,用于检测二次电子或反射电子的传感器,用于从电子束的照射开始时间点将信号顺序地转换成数字图像信号的A / D转换器, 用于通过在每个像素的基础上将来自第一设定时刻的数字图像信号与第二设定时间点相加来创建检测图像的加法电路,以及用于通过比较检测图像来判断缺陷的图像处理电路 具有形成在检查对象上的电路图案的参照图像。