Apparatus for detection of surface contaminations on silicon wafers
    5.
    发明授权
    Apparatus for detection of surface contaminations on silicon wafers 失效
    用于检测硅晶片表面污染的装置

    公开(公告)号:US5689112A

    公开(公告)日:1997-11-18

    申请号:US631059

    申请日:1996-04-12

    摘要: Surface contamination of silicon wafers is detected by a combined beam-deflecting magnet and magnetic spectrometer system. Heavy ions are directed onto the surface of a silicon wafer through the beam-deflecting magnet, and ions back-scattered from contaminants in the surface of the wafer pass through the magnetic spectrometer onto a focal-plane detector. One or more Einzel lenses prevent ions back-scattered from the silicon in the wafer from reaching the detector.

    摘要翻译: 通过组合的光束偏转磁体和磁谱仪系统检测硅晶片的表面污染。 重离子通过光束偏转磁体被引导到硅晶片的表面上,并且从晶片表面的污染物反向散射的离子通过磁性光谱仪进入焦平面检测器。 一个或多个Einzel透镜防止从晶片中的硅反向散射的离子到达检测器。