Patent ID: 11923175
Assignee: COMET TECHNOLOGIES USA, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A method for adjusting a match tuning capacitor in a matching network in a radio frequency plasma processing device, the method including:
determining a plurality of different variable gain settings for the match tuning capacitor based, at least in part, on a plurality of different match region of operation associated with the match tuning capacitor;
applying the plurality of different variable gain settings to a feedback signal from the matching network to determine a plurality of different adjustments for the match tuning capacitor; and
implementing the plurality of different adjustments for the match tuning capacitor;
wherein:
the match tuning capacitor is responsive to both positive errors and negative errors in each match region of operation; and
the variable gain settings avoid over-damped and under-damped adjustment of the tuning motor in the different regions of operation of the match tuning capacitor.