Method and apparatus for cleaning by-products from plasma chamber
surfaces
    7.
    发明授权
    Method and apparatus for cleaning by-products from plasma chamber surfaces 失效
    从等离子体室表面清洗副产品的方法和设备

    公开(公告)号:US5756400A

    公开(公告)日:1998-05-26

    申请号:US568064

    申请日:1995-12-08

    CPC分类号: B08B7/0042 Y10S438/905

    摘要: The present invention provides an apparatus and process for plasma cleaning the interior surfaces of semiconductor processing chambers. The method is directed to the dry etching of accumulated contaminant residues attached to the inner surfaces of the plasma processing chamber and includes introducing a cleaning gas mixture of a halogen-containing gas; activating a plasma in an environment substantially free of oxygen species; contacting the contaminant residues with the activated cleaning gas to volatilize the residues; and removing the gaseous by-products from the chamber. The etchant gaseous mixture comprises an even or greater amount of at least one fluorine-containing gas and an even or lesser amount of at least one chlorine-containing gas. The instant invention enables the intermittent use of the cleaning steps in an ongoing plasma processing of semiconductor wafers without chamber downtime and significant loss of wafer production.

    摘要翻译: 本发明提供了一种用于等离子体清洁半导体处理室内表面的装置和方法。 该方法涉及连接到等离子体处理室的内表面上的累积污染物残留物的干蚀刻,并且包括引入含卤素气体的清洁气体混合物; 在基本上不含氧物质的环境中激活等离子体; 使污染物残留物与活化的清洁气体接触以挥发残余物; 并从室中除去气态副产物。 蚀刻剂气体混合物包含甚至或更多量的至少一种含氟气体和甚至或更少量的至少一种含氯气体。 本发明能够在半导体晶片的持续等离子体处理中间歇地使用清洁步骤,而无需室停机和晶片生产的显着损失。