Patent ID: 11887820
Assignee: COMET TECHNOLOGIES USA, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A system for controlling the electromagnetic wave power spectrum on a surface of a wafer in a radio frequency plasma processing system comprising:
a reaction chamber for receiving radio-frequency power generating a plasma;
an electrode having an electrode symmetry axis, the electrode for receiving a flow of the plasma in the reaction chamber as the plasma performs a plasma process on a wafer positioned adjacent to the electrode;
a plurality of sensors disposed in the reaction chamber and positioned adjacent to and spaced around a perimeter of the electrode at a gap from the electrode;
an automated controller operative for:
determining a plasma fault condition within the chamber based measurements received from the sensors;
implementing one or more response actions in response to the plasma fault condition.