RF impedance model based fault detection
US10748748B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2018 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Oct 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H2242/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method to detect a potential fault in a plasma system is described. The method includes accessing a model of one or more parts of the plasma system. The method further includes receiving data regarding a supply of RF power to a plasma chamber. The RF power is supplied using a configuration that includes one or more states. The method also includes using the data to produce model data at an output of the model. The method includes examining the model data. The examination is of one or more variables that characterize performance of a plasma process of the plasma system. The method includes identifying the fault for the one or more variables. The method further includes determining that the fault has occurred for a pre-determined period of time such that the fault is identified as an event. The method includes classifying the event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.