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    • 2. 发明授权
    • Method and apparatus for measuring gripping strength of a vacuum wand
    • 用于测量真空棒的夹紧强度的方法和装置
    • US06971270B2
    • 2005-12-06
    • US10782036
    • 2004-02-19
    • Ruei-Hung JangChih-Lin YingTsung-Chi HsiehSheng-Liang PanChing-Hui Tai
    • Ruei-Hung JangChih-Lin YingTsung-Chi HsiehSheng-Liang PanChing-Hui Tai
    • G01L1/00G01L5/00G01L5/22G01L7/00
    • G01L5/0033G01L5/226
    • A method and apparatus for measuring the vacuum gripping strength of a vacuum wand or robotic arm provides a pressure gauge and a conduit extending from the pressure gauge and terminating at an opening formed in a receiving surface. A vacuum wand head is positioned on the receiving surface such that the gripping surface of the vacuum wand forms a conterminous boundary with the receiving surface and the vacuum port of the vacuum wand is aligned over the opening formed in the receiving surface. The receiving surface replicates a wafer surface so that the same vacuum gripping strength as would be delivered to a wafer being gripped by the vacuum wand, is thereby sensed by the pressure gauge. Spring loaded positioning members act in conjunction with a clamp member and a mechanical stop position the vacuum wand head in the receiving area and over the opening and also to assure that the gripping surface of the vacuum wand head is flush against the surface of the receiving area. Diminution of vacuum gripping strength caused by scratches or other defects of the gripping surface that cause vacuum leaks between gripping surface and the wafer surface, are similarly reproduced and sensed by the pressure gauge.
    • 用于测量真空棒或机器人手臂的真空夹紧强度的方法和装置提供压力计和从压力计延伸并终止于形成在接收表面中的开口的导管。 真空棒头定位在接收表面上,使得真空棒的抓握表面与接收表面形成一个连续的边界,并且真空棒的真空端口在形成在接收表面中的开口上对准。 接收表面复制晶片表面,从而通过压力计感测到与由真空棒夹持的晶片相同的真空夹紧强度。 弹簧加载的定位构件与夹紧构件一起作用并且机械地将真空棒头位于接收区域中并在开口上并且还确保真空棒头的夹持表面与接收区域的表面齐平 。 通过压力计类似地再现和感测由夹紧表面上的擦伤或其他缺陷导致抓握表面和晶片表面之间的真空泄漏的真空夹紧强度的减小。