Patent ID: 11908660
Assignee: LAM RESEARCH CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A controller for reducing reflected power, comprising:
a processor configured to:
determine a capacitance of an impedance matching circuit for which power reflected towards a high frequency (HF) radio frequency (RF) generator is reduced;
determine a plurality of offsets from a reference frequency of the HF RF generator, wherein each of the plurality of offsets is determined for a corresponding one of a plurality of time intervals of a cycle of a waveform associated with a low frequency (LF) RF generator;
control the impedance matching circuit to have the capacitance; and
control the HF RF generator to operate at the plurality of offsets with respect to the reference frequency; and

a memory device coupled to the processor.