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    • 71. 发明申请
    • Defect Review Apparatus and Method of Reviewing Defects
    • 缺陷评估装置及缺陷检查方法
    • US20110062328A1
    • 2011-03-17
    • US12953170
    • 2010-11-23
    • Takehiro HIRAIKenji ObaraKohei Yamaguchi
    • Takehiro HIRAIKenji ObaraKohei Yamaguchi
    • G01N23/04
    • H01J37/265H01J37/28H01J2237/221H01J2237/2817H01J2237/2826
    • The present invention aims to provide a defect review apparatus capable of suppressing a reduction in throughput with a minimized deviation-amount measurement, and capable of optimizing an FOV of a monitoring image. To this end, the review apparatus for reviewing a specimen by moving the specimen to pre-calculated coordinate includes: a function to measure a deviation amount between the pre-calculated coordinates and coordinates of an actual position of the specimen; a function to optimize a coordinate correcting expression to minimize the measured deviation amount; and a function to determine that the deviation amounts have converged. When the deviation amounts have converged, the measurement for the coordinate-correcting-expression optimization is terminated. Thereby, the reduction in throughput is suppressed to the minimum level, and furthermore a FOV necessary for the specimen to be within the field of view is set according to a convergence value of the calculated deviation amount.
    • 本发明的目的在于提供一种缺陷检查装置,其能够以最小化的偏差量测量来抑制吞吐量的降低,并能够优化监视图像的FOV。 为此,用于通过将样本移动到预先计算的坐标来检查样本的检查装置包括:测量预先计算的坐标与样本的实际位置的坐标之间的偏差量的函数; 优化坐标校正表达式以最小化所测量的偏差量的函数; 以及确定偏差量已经收敛的函数。 当偏差量收敛时,终止坐标校正表达式优化的测量。 由此,将吞吐量的降低抑制到最小水平,并且根据计算出的偏差量的收敛值来设定样本在视野范围内所需的FOV。
    • 74. 发明授权
    • Scanning electron microscope
    • 扫描电子显微镜
    • US07732765B2
    • 2010-06-08
    • US11984319
    • 2007-11-15
    • Kohei YamaguchiKenji Obara
    • Kohei YamaguchiKenji Obara
    • H01J37/26
    • H01J37/28H01J37/222H01J37/244H01J37/265H01J2237/216H01J2237/24475H01J2237/2448H01J2237/24495
    • A technique executes autofocus adjustment stably even when a plurality of patterns or foreign matter capable of being imaged only by a specific detector are included independently. Such an image as a concavo-convex image having a weak contrast can be picked up. The technique can automatically focus such an image even when it is difficult to find a focus position in the image. A scanning electron microscope includes a plurality of detectors for detecting secondary signals from a specimen when irradiated with an electron beam, and a calculation unit for combining the signals obtained from the detectors. At least two of the detectors are provided to be symmetric with respect to the electron beam. The focus of the electron beam is adjusted based on the signals of the detectors or on a signal corresponding to a combination of the signals.
    • 即使独立地包括仅能够由特定检测器成像的多个图案或异物也能够稳定地执行自动聚焦调整。 可以拾取这样的具有弱对比度的凹凸图像的图像。 即使在图像中难以找到焦点位置,该技术也可以自动对焦这样的图像。 扫描电子显微镜包括多个用于在用电子束照射时检测来自样本的次级信号的检测器,以及用于组合从检测器获得的信号的计算单元。 至少两个检测器被提供为相对于电子束对称。 基于检测器的信号或对应于信号的组合的信号来调整电子束的焦点。
    • 76. 发明授权
    • Imaging method
    • 成像方法
    • US07526143B2
    • 2009-04-28
    • US11411154
    • 2006-04-26
    • Kohei YamaguchiKazuo AokiKenji Obara
    • Kohei YamaguchiKazuo AokiKenji Obara
    • G06K9/36
    • G01N23/2251
    • A method which, while displacing the field-of-view, allows the image in a target area to be acquired without degradations such as out-of-focus of the image. Plural pieces of images are acquired before and after a target area while displacing the field-of-view. Next, these images are grouped into groups each of which includes several pieces of images, and integrated images on each group basis are created. Moreover, a relational expression is calculated which holds between image displacement quantity calculated by comparing the integrated images with each other and the number of the photographed pieces of images. Furthermore, image displacement quantities between the acquired plural pieces of images are calculated from this relational expression. Finally, these images are corrected by the amounts of these displacement quantities, then being integrated. This process allows reconfiguration of the image in the target area.
    • 在移动视野的同时允许获取目标区域中的图像而不降低诸如图像的失焦的方法。 在移动视野之前,在目标区域之前和之后获取多张图像。 接下来,将这些图像分组成各自包括几个图像的组,并且创建基于每个组的集成图像。 此外,计算出通过比较集成图像计算的图像位移量与拍摄的图像数量之间的关系表达式。 此外,从该关系式计算所获取的多张图像之间的图像位移量。 最后,这些图像被这些位移量的量校正,然后被整合。 该过程允许重新配置目标区域中的图像。
    • 78. 发明申请
    • Method and apparatus for collecting defect images
    • 用于收集缺陷图像的方法和装置
    • US20050199808A1
    • 2005-09-15
    • US11020255
    • 2004-12-27
    • Kenji ObaraToshifumi HondaToshiro Kubo
    • Kenji ObaraToshifumi HondaToshiro Kubo
    • G01N23/225H01J37/28H01L21/66
    • H01J37/28H01J37/241H01J37/263H01J37/265H01J2237/2809H01J2237/2817
    • To acquire defect images even when a defect exists below an optically transparent film, an electron optical system of an electron microscope is set to a first imaging condition. A defect position of a specimen is set so as to fall within the visual field of the electron microscope, using position data of a defect of the specimen. The position of the defect is imaged by the electron microscope set to the first imaging condition to obtain a first image corresponding to the defect position. The first image is processed to determine whether a defect exists. The electron optical system is then set to a second imaging condition on the basis of the result of determination. A point imaged under the first imaging condition is imaged by the electron microscope set to the second imaging condition to acquire a second image corresponding to a defect position.
    • 为了获得缺陷图像,即使当缺陷存在于光学透明膜下方时,将电子显微镜的电子光学系统设置为第一成像条件。 使用试样的缺陷的位置数据,将试样的缺陷位置设定为落入电子显微镜的视野内。 通过设置为第一成像条件的电子显微镜对缺陷的位置成像,以获得对应于缺陷位置的第一图像。 处理第一个图像以确定是否存在缺陷。 然后基于确定的结果将电子光学系统设置为第二成像条件。 在第一成像条件下成像的点通过设置为第二成像条件的电子显微镜成像,以获得对应于缺陷位置的第二图像。