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    • 5. 发明授权
    • Alignment apparatus
    • 校准装置
    • US4170418A
    • 1979-10-09
    • US689818
    • 1976-05-25
    • Susumu AiuchiMinoru IkedaYoshio Matsumoto
    • Susumu AiuchiMinoru IkedaYoshio Matsumoto
    • G03B27/32G03F9/00G05D3/12H01L21/027H01L21/30G01B11/26
    • G03F9/70
    • An alignment apparatus, in which a mask is overlaid on a wafer and a relative displacement between the wafer and a target pattern formed on the mask is detected to effect alignment thereof, comprises a slit frame adapted to reciprocate in a direction substantially parallel to the top surface of the mask and having a slit formed therein, an illumination optical system for illuminating the target pattern, an image formation optical system for forming the image of the target pattern onto the slit of the slit frame, a light sensing element mounted on the slit frame for detecting the target pattern image formed by the image formation optical system through the slit to convert the image into an electric signal, and a displacement detector for detecting the amount of movement of the reciprocation of the slit frame to convert the amount of movement into a position signal which the light sensing element scans, whereby the output signals from the displacement detector and the light sensing element are used to detect the relative position between the mask and the target pattern on the wafer and the mask is moved relative to the wafer such that the relative displacement amount becomes zero.
    • 其中掩模覆盖在晶片上并且在晶片和形成在掩模上的目标图案之间的相对位移被检测以对准其中的对准装置,包括适于沿基本上平行于顶部的方向往复运动的狭缝框架 表面,其中形成有狭缝,用于照射目标图案的照明光学系统,用于将目标图案的图像形成在狭缝框的狭缝上的图像形成光学系统,安装在狭缝上的光感测元件 框架,用于通过狭缝检测由图像形成光学系统形成的目标图案图像,以将图像转换为电信号;以及位移检测器,用于检测狭缝框架的往复运动量以将移动量转换为 光感测元件扫描的位置信号,从而来自位移检测器和感光元件的输出信号 nt用于检测晶片上的掩模和目标图案之间的相对位置,并且掩模相对于晶片移动,使得相对位移量变为零。