Patent ID: 11881381
Assignee: LAM RESEARCH CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  C  G | IPC C  G  H

Claim 0:
1. A method of plasma-assisted semiconductor processing in multiple stations in a process chamber, the method comprising:
a) providing substrates at each of the multiple stations;
b) distributing RF power including a first target frequency to multiple stations to thereby generate a plasma in the stations, wherein the RF power is distributed according to a RF power parameter configured to reduce station to station variations;
c) tuning an impedance matching circuit for a first station included in the multiple stations while distributing RF power to the first station by:
i) measuring a capacitance of a capacitor in the impedance matching circuit without disconnecting the capacitor from the impedance matching circuit; and
ii) adjusting, according to the capacitance measured in (i) and the RF power parameter, a capacitance of the capacitor; and
d) performing a semiconductor processing operation on the substrate at each station.