Patent ID: 9720022
Date: 2017-08-01
CPC Classifications: G01R,H01J

Claim:
1. A method comprising: receiving a reference impedance, wherein the reference impedance is measured for a frequency operating range of a sensor and for a position range associated with one or more reference variable capacitors within a reference impedance matching network that is coupled to a load, wherein the load has an impedance; accessing an impedance matching model; when the load impedance is applied at an output of the impedance matching model, generating a set of reference characteristics of pre-determined elements of the impedance matching model to achieve the reference impedance at an input of the impedance matching model; receiving a test impedance, wherein the test impedance is measured for the frequency operating range of the sensor and for the position range associated with one or more test variable capacitors within a test impedance matching network coupled to the load, wherein the reference impedance matching network has a same arrangement of components as that of the test impedance matching network; when the load impedance is applied at the output of the impedance matching model, generating a set of test characteristics of the pre-determined elements of the impedance matching model to achieve the test impedance at the input of the impedance matching model; determining whether information indicating that the test impedance matching network is included within a plasma tool or information indicating that the reference impedance matching network is included within the plasma tool is received; applying in the plasma tool having the test impedance matching network the set of test characteristics to the impedance matching model to calculate one or more values of one or more parameters at the output of the impedance matching model upon determining that the information indicating that the test impedance matching network is included within the plasma tool is received; and applying in the plasma tool the set of reference characteristics to the impedance matching model to calculate one or more values of the one or more parameters at the output of the impedance matching model upon determining that the information indicating that the reference impedance matching network is included within the plasma tool is received.