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    • 5. 发明授权
    • Apparatus for determining the concentration of a gas in a vacuum chamber
    • 用于确定真空室中的气体浓度的装置
    • US5283435A
    • 1994-02-01
    • US881618
    • 1992-05-12
    • Christoph DaubeAlfred BelzUwe Kopacz
    • Christoph DaubeAlfred BelzUwe Kopacz
    • C23C14/00H01L21/203
    • C23C14/0036
    • An apparatus for determining the concentration of a gas in a vacuum chamber is described. Internal to the vacuum chamber are one or more cathodes. The chamber is fed via a gas inlet and is connected to a separate measurement chamber for accommodating a measuring device via a connecting line between the two chambers. The connecting line in conjunction with a pumping means produces a pressure gradient between the interior of the vacuum chamber and the interior of the measurement chamber. One end of the connecting line, located within the vacuum chamber terminates directly in the central region of a cathode surfaces facing the interior of the chamber, and the length, as well as the cross section of the connecting line being dimensioned so that the pressure gradient between the interior of the vacuum chamber and the interior of the measurement chamber, is precisely that required for measurement.
    • 描述了一种用于确定真空室中的气体浓度的装置。 真空室内部是一个或多个阴极。 腔室通过气体入口供给,并连接到单独的测量室,用于通过两个腔室之间的连接线容纳测量装置。 连接线与抽吸装置一起产生真空室内部和测量室内部之间的压力梯度。 位于真空室内的连接线的一端直接终止于面向腔室内部的阴极表面的中心区域,并且连接线的长度以及横截面被确定为使得压力梯度 在真空室的内部和测量室的内部之间,正是测量所需的。