Method and apparatus for chemical monitoring

The present invention relates to monitoring chemicals in a process chamber using a spectrometer having a plasma generator, based on patterns over time of chemical consumption. The relevant patterns may include a change in consumption, reaching a consumption plateau, absence of consumption, or presen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Powell, Gary B, Litvak, Herbert E
Format: Patent
Sprache:eng
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