Control of ions energy distribution in dual-frequency magnetron sputtering discharges

The ion energy distributions (IEDs) in the dual-frequency magnetron sputtering discharges were investigated by retarding field energy analyzer. Increasing power ratio of 2 MHz to 13.56 (27.12 or 60) MHz led to the evolution of IEDs from a uni-modal distribution towards a uni-modal distribution with...

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Veröffentlicht in:Physics of plasmas 2014-04, Vol.21 (4)
Hauptverfasser: Ye, Chao, He, Haijie, Huang, Fupei, Liu, Yi, Wang, Xiangying
Format: Artikel
Sprache:eng
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Zusammenfassung:The ion energy distributions (IEDs) in the dual-frequency magnetron sputtering discharges were investigated by retarding field energy analyzer. Increasing power ratio of 2 MHz to 13.56 (27.12 or 60) MHz led to the evolution of IEDs from a uni-modal distribution towards a uni-modal distribution with high-energy peak shoulder and a bi-modal distribution. While increasing power ratio of 13.56 MHz to 27.12 MHz and 27.12 MHz to 60 MHz, led to the increase of peak energy. The evolution of IEDs shape and the increase of peak energy are due to the change of ions responding to the average field of high-frequency period towards the instantaneous sheath potential of low-frequency period.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4873401