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Title: Effect of surface derived hydrocarbon impurities on Ar plasma properties

The authors report on Langmuir probe measurements that show that hydrocarbon surfaces in contact with Ar plasma cause changes of electron energy distribution functions due to the flux of hydrogen and carbon atoms released by the surfaces. The authors compare the impact on plasma properties of hydrocarbon species gasified from an etching hydrocarbon surface with injection of gaseous hydrocarbons into Ar plasma. They find that both kinds of hydrocarbon injections decrease electron density and slightly increase electron temperatures of low pressure Ar plasma. For low percentages of impurities (∼1% impurity in Ar plasma explored here), surface-derived hydrocarbon species and gas phase injected hydrocarbon molecules cause similar changes of plasma properties for the same number of hydrocarbon molecules injected into Ar with a decrease in electron density of ∼4%.
Authors:
;  [1] ;  [2]
  1. Department of Materials Science and Engineering and the Institute for Research and Applied Physics, University of Maryland, College Park, MD 20742 (United States)
  2. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122 (United States)
Publication Date:
OSTI Identifier:
22258636
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films; Journal Volume: 32; Journal Issue: 3; Other Information: (c) 2014 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ARGON; CARBON; COMPARATIVE EVALUATIONS; ELECTRON DENSITY; ELECTRON TEMPERATURE; ELECTRONS; ENERGY SPECTRA; ETCHING; HYDROCARBONS; HYDROGEN; IMPURITIES; INJECTION; LANGMUIR PROBE; MOLECULES; PLASMA; SURFACES