Patent ID: 11956883
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A plasma processing chamber comprising:
a susceptor positioned within a processing volume and configured to support one or more substrate during processing;
an RF plasma generator configured to output a variable voltage, variable current and variable phase between the voltage and the current;
at least one RF voltage-current (V/I) sensor positioned within the processing volume and configured to measure a first voltage, a first current and a phase difference between the first voltage and the first current of a substrate heater powered at 50/60 Hz; and
a controller connected to the RF plasma generator and the at least one RF voltage-current sensor, the controller configured to control the RF generator based on inputs from the at least one RF voltage-current sensor.