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Plasma Enhanced Chemical Vapor Deposition of Zirconium Nitride Thin Films

Published online by Cambridge University Press:  10 February 2011

Lauren M. Atagi
Affiliation:
Los Alamos National Laboratory, MST-7, Los Alamos, NM 87545
John A. Samuels
Affiliation:
Los Alamos National Laboratory, MST-7, Los Alamos, NM 87545
David C. Smith
Affiliation:
Los Alamos National Laboratory, MST-7, Los Alamos, NM 87545
David M. Hoffman
Affiliation:
Department of Chemistry, University of Houston, Houston, TX 77204
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Abstract

Depositions of high quality zirconium nitride, (Zr3N4), films using the metal-organic precursor Zr(Net2)4 were carried out in a microwave argon/ammonia plasma (2.45 GHz). The films were deposited on crystalline silicon wafers and quartz substrates at temperatures of 200–400 °C. The transparent yellow films have resistivity values greater than MΩ cm. The stoichiometry is N/Zr = 1.3, with less than 5 atom % carbon and little of no oxygen. The hydrogen content is less than 9 atom %, and it does not vary with deposition temperature. The growth rates range from 600 to 1200 Å/min, depending on the flow rates and precursor bubbler temperature. X-ray diffraction studies show a Zr3N4 film deposited at 400 °C is polycrystalline with some (220) orientation. The crystallite size is approximately 30 Å. The band gap, as estimated from transmission spectra, is 3.1 eV.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

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