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Indexed by:期刊论文

Date of Publication:2014-06-14

Journal:JOURNAL OF APPLIED PHYSICS

Included Journals:SCIE、EI、Scopus

Volume:115

Issue:22

ISSN No.:0021-8979

Abstract:Computer simulations based on the particle-in-cell/Monte Carlo collision method are performed to study the plasma characteristics and especially the transition in electron heating mechanisms in a hybrid direct current (dc)/dual-frequency (DF) capacitively coupled CF4 discharge. When applying a superposed dc voltage, the plasma density first increases, then decreases, and finally increases again, which is in good agreement with experiments. This trend can be explained by the transition between the four main heating modes, i.e., DF coupling, dc and DF coupling, dc source dominant heating, and secondary electron dominant heating. (C) 2014 AIP Publishing LLC.