Patent ID: 11929235
Assignee: LAM RESEARCH CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A tuning method comprising:
during recipe development,
accessing, for a set of one or more cycles of operation of a first radio frequency generator, a plurality of reflection parameter values associated with a second radio frequency generator;
calculating a plurality of load impedance parameter values from the plurality of reflection parameter values by applying the plurality of reflection parameter values to a computer-based model of at least a portion of a radio frequency path, wherein the radio frequency path is between the second radio frequency generator and an electrode of a plasma chamber;
receiving a plurality of frequency modulation parameters of a radio frequency signal to be generated by the second radio frequency generator;
determining values of the plurality of frequency modulation parameters by applying the plurality of load impedance parameter values to the computer-based model, wherein the values of the plurality of frequency modulation parameters are determined to minimize one or more reflection coefficient parameters at an input of the computer-based model;

during processing of a substrate within another plasma chamber,
controlling a third radio frequency generator according to the values of the plurality of frequency modulation parameters determined during the recipe development, wherein said controlling the third radio frequency generator is performed during a set of one or more cycles of operation of a fourth radio frequency generator.