Arrangement for plasma processing system control based on RF voltage
US9455126B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2015 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jul 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arrangement for controlling a plasma processing system is provided. The arrangement includes an RF sensing mechanism for obtaining an RF voltage signal. The arrangement also includes a voltage probe coupled to the RF sensing mechanism to facilitate acquisition of the signal while reducing perturbation of RF power driving a plasma in the plasma processing system. The arrangement further includes a signal processing arrangement configured for receiving the signal, split the voltage signals into a plurality of channels, convert the signals into a plurality of direct current (DC) signals, convert the DC signals into digital signals and process the digital signal in a digital domain to generate a transfer function output. The arrangement moreover includes an ESC power supply subsystem configured to receive the transfer function output as a feedback signal to control the plasma processing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.