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    • 7. 发明专利
    • Pattern position detector
    • 图案位置检测器
    • JPS59210312A
    • 1984-11-29
    • JP8546083
    • 1983-05-16
    • Nippon Kogaku Kk
    • HAMASHIMA MUNEKI
    • G01B15/00H01J37/28H01J37/304
    • H01J37/28H01J37/3045
    • PURPOSE:To detect a pattern position accurately and automatically at a high speed by obtaining time-series pattern information by a moving means which is independent of a scanner at an invariably prescribed position in the scanning track of an energy beam. CONSTITUTION:The horizontal scanning signal HS and vertical scanning signal VS from a scanning signal generating circuit 11 are applied to a scanning coil 4, and consequently an electron beam EB makes a raster scan in a sample WP. The detection signal A of a detector 7 is inputted to a brightness modulating circuit 16 to form an image SEM of the sample WP synchronously with the scanning of the electron beam EB. The horizontal scanning signal HS from an OSC11 is compared with a reference voltage Vr1, and a pulse signal B is outputted when they coincide with each other and inputted as a signal for cursor display to the brightness modulating circuit 16. The voltage of the detection signal A is smoothed by an integral smoothing circuit 22, whose signal C is compared with a slice voltage Vr2 by a comparator 23. When the signal C is larger, a gate signal D is outputted, and measuring operation starts at the rising of th signal D and ends at the falling.
    • 目的:通过在能量束的扫描轨迹中的不变的规定位置处独立于扫描仪的移动装置获得时间序列图案信息来高速地精确和自动地检测图案位置。 构成:扫描信号发生电路11的水平扫描信号HS和垂直扫描信号VS被施加到扫描线圈4,因此电子束EB在样本WP中进行光栅扫描。 检测器7的检测信号A被输入到亮度调制电路16,以与扫描电子束EB同步地形成样本WP的图像SEM。 将来自OSC11的水平扫描信号HS与参考电压Vr1进行比较,并且当它们彼此一致时输出脉冲信号B,并将其作为用于光标显示的信号输入到亮度调制电路16.检测信号的电压 A由积分平滑电路22平滑,积分平滑电路22的信号C通过比较器23与片电压Vr2进行比较。当信号C较大时,输出栅极信号D,并且在信号D的上升开始测量操作 并以坠落结束。
    • 8. 发明专利
    • Focus controller
    • 聚焦控制器
    • JPS5919913A
    • 1984-02-01
    • JP12994082
    • 1982-07-26
    • Nippon Kogaku Kk
    • HAMASHIMA MUNEKIMURAKAMI SHIGEO
    • G03B13/36G02B7/36G02B7/38
    • G02B7/36
    • PURPOSE:To widen the control range of a focus position and to improve precision by splitting reflected light into two pieces of luminous flux, guiding one to a photoelectric detector for front and rear out-of-focus detection and the other to a photoelectric detector for focusing detection, and increasing the image formation magnifiction of the focusing detection. CONSTITUTION:Luminous flux from a half-mirror 3 is aplit into two pieces of luminous flux; one piece of luminous flux is incident to a short-focus lens 9 through a mirror 8, and the other piece of luminous flux is incident to a long- focus lens 10. The luminous flux passed through the lens 9 reaches the center part of a charge coupled device CCD15 through a split surface 13a. Luminous flux reflected by a split surface 13a reaches the leftside part of the CCD15 and luminous flux passed through a lens 10 reaches the right-side part of the CCD15. The photodetection surface of a focusing detection area 15a is arranged at an expected focal plane when the focal point of an objective 5 coincides with a sample surface. Then, the image formation magnification of a photoelectric detector for a focusing surface is increased. Consequently, the control range of the focus position is widened and the precision is improved.
    • 目的:扩大对焦位置的控制范围,通过将反射光分成两束光通量来提高精度,将其引导到光电检测器进行前后离焦检测,另一种用于光电检测器 聚焦检测,并增加聚焦检测的图像形成宏观。 构成:半透镜3的光通量分为两片光通量; 一束光束通过反射镜8入射到短焦透镜9,另一束光通量入射到长焦聚焦透镜10.透过透镜9的光束到达中心部分 电荷耦合器件CCD15通过分离表面13a。 由分割面13a反射的光通量到达CCD15的左侧部分,通过透镜10的光束到达CCD15的右侧部分。 当物镜5的焦点与样品表面重合时,聚焦检测区域15a的光电检测表面被布置在预期的焦平面处。 然后,增加了用于聚焦表面的光电检测器的图像形成倍率。 因此,聚焦位置的控制范围变宽,精度提高。
    • 10. 发明专利
    • Pattern position detector using laser beams
    • 使用激光束的图案位置检测器
    • JPS61141449A
    • 1986-06-28
    • JP26403784
    • 1984-12-14
    • Nippon Kogaku Kk
    • HAMASHIMA MUNEKIKATO KINYA
    • G03F9/00G03F7/20H01L21/027H01L21/66
    • G03F7/70616G03F7/70625G03F7/70633
    • PURPOSE:To detect the position of a pattern with high resolution and high precision by scanning a pattern with a laser spot beam and separately obtaining 3 kinds of optical information; scattered light from the edge of the pattern, reflected light from the pattern, and fluorescent light from the pattern, at the same time, and detecting the position of the pattern. CONSTITUTION:The device is provided with an optical system for condensing laser beams into a minute spot light and irradiating it on a semiconductor wafer W, a scanning means 3 for relatively scanning the sample to be tested and the spot light, the first photoelectric detectors 10, 13 for receiving at least one of reflected light from the pattern, and scattered light produced from the border of the pattern (level difference edge) by the irradiation of the spot light, and the second photoelectric detector 24 for receiving fluorescent light or phosphorescence produced from the pattern by irradiation of the spot light. The position of the pattern is detected in accordance with the detection information of the first detectors 10, 13, and that of the second detector 24, and the information on the relative scanning position of the spot light.
    • 目的:通过用激光点光束扫描图案并分别获得3种光学信息,以高分辨率和高精度检测图案的位置; 来自图案的边缘的散射光,来自图案的反射光,以及来自图案的荧光,同时检测图案的位置。 构成:该装置设置有用于将激光束聚光到微小的点光并将其照射在半导体晶片W上的光学系统,用于相对扫描被测试样品的扫描装置3和聚光灯,第一光电检测器10 13,用于从图案接收至少一个反射光,以及通过点光的照射从图案的边界(电平差边缘)产生的散射光,以及用于接收荧光或磷光的第二光电检测器24 从图案通过照射点光。 根据第一检测器10,13的检测信息和第二检测器24的检测信息以及关于聚光的相对扫描位置的信息来检测图案的位置。