Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 49, Issue 34, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0022-3727/49/34/345202
Keywords
plasma jet; fluid model; hydrodynamic equations; argon; precursor; HMDSO
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Funding
- German Research Foundation [LO 623/3-1]
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The gas flow and plasma in a miniaturized non-thermal atmospheric pressure plasma jet for plasma enhanced chemical vapour deposition has been investigated by means of hydrodynamic modelling. The investigation focuses on the interplay between the plasma generation in the active zone where the power is supplied by an rf voltage to the filaments, the transport of active plasma particles due to the gas flow into the effluent, their reactions with the thin film precursor molecules and the transport of precursor fragments towards the substrate. The main features of the spatially two-dimensional model used are given. The results of the numerical modelling show that most active particles of the argon plasma are mainly confined within the active volume in the outer capillary of the plasma jet, with the exception of molecular argon ions which are transported remarkably into the effluent together with slow electrons. A simplified model of the precursor kinetics yields radial profiles of precursor fragment fluxes onto the substrate, which agree qualitatively with the measured profiles of thin films obtained by static film deposition experiments.
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