Apparatus for transferring wafer, method for transferring wafer using the same with three sensors

    公开(公告)号:US11315817B2

    公开(公告)日:2022-04-26

    申请号:US16906820

    申请日:2020-06-19

    Abstract: An apparatus for transferring a wafer includes a main body, a first support installed in the main body, a sensor support fixed to the first support, a finger member slidably installed along the first support to transfer the wafer and positioned at a lower level than the sensor support, three sensors each including a light emitter installed on the first support and a light receiver installed on the sensor support, the three sensors respectively configured to detect three points of an edge of the wafer seated on the finger member, and a controller connected to the three sensors, wherein the controller is configured to determine whether any of the three points of the edge of the wafer is detected from a notch of the wafer based on signals received from the sensors.

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