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

Claim 26:
27. 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, wherein each of the plurality of reflection parameter values corresponds to a bin of each of the one or more cycles of operation of the first 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;
determining values of a 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 a plurality of values of a reflection coefficient parameter at an input of the computer-based model for each of the bins;

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 frequency generator is performed during a set of one or more cycles of operation of a fourth radio frequency generator.