Electron beam irradiating apparatus and electric signal detecting
apparatus
    1.
    发明授权
    Electron beam irradiating apparatus and electric signal detecting apparatus 失效
    电子束照射装置和电信号检测装置

    公开(公告)号:US5818217A

    公开(公告)日:1998-10-06

    申请号:US222392

    申请日:1994-04-04

    CPC分类号: H01J37/3026 H01J37/026

    摘要: To prevent electric charge up from being accumulated on the plane scanned by an electron beam and further to improve the S/N ratio, an electron beam irradiating apparatus comprising: position information signal outputting section for outputting position information signals, in sequence to designate positions at which an electron beam is irradiated on a plane scanned by the electron beam, so as to designate the irradiation positions at random; and irradiation controller for-controlling the electron beam to irradiate the electron beam at the irradiation positions in response to the outputted position information signals. Further, to integrate an photoelectric signal over a sufficient time interval within the period of the pixel clock signal, the electric signal detecting circuit comprises a plurality of sample hold circuits and a selecting circuit for selecting and activating the sample hold circuits in sequence.

    摘要翻译: 为了防止电荷积累在由电子束扫描的平面上并进一步提高S / N比,电子束照射装置包括:位置信息信号输出部分,用于输出位置信息信号,以依次指定位置信息信号 电子束照射在由电子束扫描的平面上,以便随机地指定照射位置; 以及照射控制器,用于响应于输出的位置信息信号,控制电子束在照射位置照射电子束。 此外,为了在像素时钟信号的周期内在足够的时间间隔内积分光电信号,电信号检测电路包括多个采样保持电路和用于依次选择和激活采样保持电路的选择电路。

    Pattern dimension measuring system and pattern dimension measuring method
    2.
    发明授权
    Pattern dimension measuring system and pattern dimension measuring method 失效
    图案尺寸测量系统和图案尺寸测量方法

    公开(公告)号:US06515296B1

    公开(公告)日:2003-02-04

    申请号:US09570538

    申请日:2000-05-12

    IPC分类号: G01N2300

    CPC分类号: G01N23/225

    摘要: In an operation of a pattern dimension measuring system comprising a stage, an electron gun part, electron lens systems for scanning electron beam on a sample and having a MOL mechanism thereto, a secondary electron detector for detecting secondary electrons and so forth emitted from the sample, and a host computer having a pattern dimension measuring part, the stage is moved at a constant velocity, the coordinates of the stage is measured by a laser interferometer in real time, the variation in working distance of the electron beam is measured in real time by the optical lever system from a focal length measuring part to be fed back to a stage control part and an objective lens. When a pattern serving as an object to be measured reaches a region capable of scanning, the electron beam is scanned in the best focus while moving the scanning start position of the electron beam in synchronism with the constant velocity movement of the stage, so that the SEM image thereof is acquired.

    摘要翻译: 在包括阶段,电子枪部分,用于在样品上扫描电子束并具有MOL机制的电子透镜系统的图案尺寸测量系统的操作中,用于检测从样品发射的二次电子等的二次电子检测器 和具有图形尺寸测量部件的主机,以等速移动平台,通过激光干涉仪实时测量舞台的坐标,实时测量电子束的工作距离的变化 通过光学杆系统从焦距测量部分反馈到舞台控制部分和物镜。 当作为被测量物体的图案到达能够扫描的区域时,电子束以最佳聚焦扫描,同时与舞台的等速运动同步地移动电子束的扫描开始位置, 获取其SEM图像。

    Electron beam irradiating apparatus and electric signal detecting
apparatus
    3.
    发明授权
    Electron beam irradiating apparatus and electric signal detecting apparatus 失效
    电子束照射装置和电信号检测装置

    公开(公告)号:US5315119A

    公开(公告)日:1994-05-24

    申请号:US983229

    申请日:1992-11-19

    CPC分类号: H01J37/3026 H01J37/026

    摘要: To prevent electric charge up from being accumulated on the plane scanned by an electron beam and further to improve the S/N ratio, an electron beam irradiating apparatus comprising: position information signal outputting section for outputting position information signals, in sequence to designate positions at which an electron beam is irradiated on a plane scanned by the electron beam, so as to designate the irradiation positions at random; and irradiation controller for controlling the electron beam to irradiate the electron beam at the irradiation positions in response to the outputted position information signals. Further, to integrate an photoelectric signal over a sufficient time interval within the period of the pixel clock signal, the electric signal detecting circuit comprises a plurality of sample hold circuits and a selecting circuit for selecting and activating the sample hold circuits in sequence.

    摘要翻译: 为了防止电荷积累在由电子束扫描的平面上并进一步提高S / N比,电子束照射装置包括:位置信息信号输出部分,用于输出位置信息信号,以依次指定位置信息信号 电子束照射在由电子束扫描的平面上,以便随机地指定照射位置; 以及照射控制器,用于响应于输出的位置信息信号,控制电子束在照射位置照射电子束。 此外,为了在像素时钟信号的周期内在足够的时间间隔内积分光电信号,电信号检测电路包括多个采样保持电路和用于依次选择和激活采样保持电路的选择电路。

    Apparatus and method for controlling irradiation of an electron beam at
a fixed position in an electron beam tester system
    4.
    发明授权
    Apparatus and method for controlling irradiation of an electron beam at a fixed position in an electron beam tester system 失效
    用于控制电子束测试仪系统中固定位置的电子束照射的装置和方法

    公开(公告)号:US4807159A

    公开(公告)日:1989-02-21

    申请号:US897429

    申请日:1986-08-18

    CPC分类号: G01R31/305

    摘要: Before detecting the surface state of specific patterns a sample by means of an electron beam tester system, patterns formed in a specified surface area of the sample, are detected by deflecting an electron beam by a deflection coil. Data representing current supplied to the deflection coil, data representing the position of the sample during the pattern-detecting operation, and image signals representing the patterns found in the specified surface area, are stored in a memory. While the specific patterns of a sample are being detected, the electron beam is used to perform a second pattern-detecting operation. Data representing current supplied to the deflection coil during the second pattern-detecting operation, such data representing the position of the sample, and image signals provided by the second pattern-detecting operation representing the patterns formed in the specified surface area, afe compared with those data items already stored in the memory. From the difference between the compared two sets of data items, any drift in the electron beam is calculated. In accordance with the drift thus calculated, the deflection coil is energized to deflec the electron beam such that the beam is applied onto the desired portion of the sample.

    摘要翻译: 在通过电子束测试仪系统检测特定图案的表面状态之前,通过偏转线圈偏转电子束来检测在样品的规定表面积中形成的图案。 表示提供给偏转线圈的电流的数据,表示图案检测操作期间的样品的位置的数据和表示在指定表面积中发现的图案的图像信号被存储在存储器中。 当正在检测样品的特定图案时,电子束用于执行第二图案检测操作。 表示在第二图案检测操作期间提供给偏转线圈的电流的数据,表示样品位置的数据和表示在指定表面积中形成的图案的第二图案检测操作提供的图像信号 已存储在存储器中的数据项。 根据比较的两组数据项之间的差异,计算电子束中的任何漂移。 根据如此计算的漂移,偏转线圈被通电以使电子束分离,使得光束被施加到样品的期望部分上。

    Pattern Measurement method
    5.
    发明授权
    Pattern Measurement method 失效
    图案测量方法

    公开(公告)号:US4910398A

    公开(公告)日:1990-03-20

    申请号:US257862

    申请日:1988-10-14

    摘要: This method is a method of measuring a taper angle, a thickness or a depth of a semiconductor integrated circuit pattern. Electron beam, light beam or the like is irradiated to a semiconductor integrated circuit pattern provided on a reference plane, thus to form a projected image. The projected image forms a predetermined angle with respect to a reference line set with respect to the reference plane. Then, lengths in a direction of the reference line of the projected images of symmetrical side walls of the pattern are measured to calculate from the ratio of those lengths and angle that the side walls and the reference plane form.