Patent ID: 9652567
Date: 2017-05-16
CPC Classifications: G06F,H01J,H05H

Claim:
1. Method for determining an RF transmission line model for a complete RF transmission system comprising: generating a baseline RF transmission line model characterizing the RF transmission system, the baseline RF transmission line model having a plurality of stages ending at an input to an electrostatic chuck; calculating at least one of a plasma RF voltage (Vrf), and/or a plasma RF current (Irf) and/or a plasma RF power (Prf) from the baseline RF transmission line model based on an empirically measured RF induced DC bias voltage; adding an end module to the baseline RF transmission line model to create at least one revised RF transmission line model, the end module including the electrostatic chuck, a plasma and an RF return path; calculating at least one of a revised plasma RF voltage (V′rf) and/or a revised plasma RF current (I′rf) and/or a revised plasma RF power (P′rf) and/or a corresponding revised RF induced DC bias voltage from each of the at least one revised baseline RF transmission line models; scoring each one of the at least one revised RF transmission line models to identify a best fitting revised RF transmission line model; and recording the best fitting revised RF transmission line model as a complete RF transmission line model.