Inventors:
- Fremont CA, US
Felix Kozakevich - Sunnyvale CA, US
Michael C. Kellogg - San Francisco CA, US
John Patrick Holland - San Jose CA, US
Zhigang Chen - Campbell CA, US
Kenneth Lucchesi - Newark CA, US
Lin Zhao - Fremont CA, US
International Classification:
H01J 37/32
H01L 21/3065
H01L 21/67
H01L 21/687
Abstract:
Systems and methods for achieving a pre-determined factor associated with the edge region within the plasma chamber is described. One of the methods includes providing an RF signal to a main electrode within the plasma chamber. The RF signal is generated based on a frequency of operation of a first RF generator. The method further includes providing another RF signal to an edge electrode within the plasma chamber. The other RF signal is generated based on the frequency of operation of the first RF generator. The method includes receiving a first measurement of a variable, receiving a second measurement of the variable, and modifying a phase of the other RF signal based on the first measurement and the second measurement. The method includes changing a magnitude of a variable associated with a second RF generator to achieve the pre-determined factor.