SENSORS AND SYSTEM FOR IN-SITU EDGE RING EROSION MONITOR

The present disclosure generally relates to a method and apparatus for determining a metric related to erosion of a ring assembly used in an etching within a plasma processing chamber. In one example, the apparatus is configured to obtain a metric indicative of erosion on an edge ring disposed on a substrate support assembly in a plasma processing chamber. A sensor obtains the metric for the edge ring. The metric correlates to the quantity of erosion in the edge ring. In another example, the ring sensor may be arranged outside of a periphery of a substrate support assembly. The metric may be acquired by the ring sensor through a plasma screen. 本公开内容总体上涉及一种用于确定与在等离子体处理腔室内的蚀刻中使用的环组件的腐蚀有关的度量的方法和设备。在一个示例中，设备被配置为获取指示在等离子体处理腔室中设置在基板支撑组件上的边缘环上的腐蚀的度量。传感器获取边缘环的度量。度量与边缘环中的腐蚀量相关。在另一示例中，环传感器可布置在基板支撑组件的外周的外部。度量可由环传感器通过等离子体屏来获取。