Transport Coefficients in Mixtures Ar/H_2

• Authors: Ž. Nikitović , V. Stojanović
• Languages of publication: EN

Abstracts

EN

In this work we present electron transport coefficients for electrons in Ar/H_2 mixtures for the conditions used in plasma assisted technologies for semiconductor production i.e. in moderate to very high reduced electric field E/N (E - electric field, N - gas density). We used a two term numerical solution of the Boltzmann equation at the lowest E/N and mean energies and also Monte Carlo simulation technique at moderate and high E/N. We show that a good agreement with experimental data exists for low and moderate E/N and that based on the tests for pure H_2 and Ar we can model properly the high E/N development. Results were obtained for abundances of H_2 from 1% to 50%. Such data are required to test the sets of cross-section data which are necessary in kinetic models for this mixture and also to produce transport coefficients for fluid models. Hydrogen is used for etching of organic compounds, most importantly low k dielectrics, at the same time argon as a buffer gas is added to control the mean energy and distribution function. Besides, operation at high E/N allows the generation of fast neutrals for charging free etching on nanometer scales.

Keywords

EN

51.10.+y; 52.20.Hv; 52.65.Pp; 52.77.-j

Discipline

• 52.77.-j: Plasma applications
• 52.65.Pp: Monte Carlo methods
• 51.10.+y: Kinetic and transport theory of gases(see also 05.20.Dd Kinetic theory in classical statistical mechanics; see also 47.70.Mc Radiation gas dynamics)
• 52.20.Hv: Atomic, molecular, ion, and heavy-particle collisions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 1
• Pages: 73-75

Dates

published

2013-01

received

2012-08-23

(unknown)

2012-11-23

Contributors

author

Ž. Nikitović

• Institute of Physics, University of Belgrade, POB 68, 11080 Belgrade, Serbia

author

V. Stojanović

• Institute of Physics, University of Belgrade, POB 68, 11080 Belgrade, Serbia

References

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Identifiers

DOI

10.12693/APhysPolA.123.73