Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 154, Issue 4, Pages H318-H324Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2456199
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Ge2Sb2Te5 (GST) thin films were deposited on SiO2/Si and TiN/Si substrates by cyclic metallorganic chemical vapor deposition using Ge(i-C4H9)(4), Sb(i-C3H7)(3), Te(i-C3H7)(2) as Ge, Sb, and Te precursors, respectively, with the help of Ar+H-2 plasma at temperatures ranging from 180 to 290 degrees C. The application of plasma power was essential in obtaining a high growth rate and stoichiometric GST thin films. The chemical composition of the films was properly controlled by the cycling ratio and sequence of each precursor pulse. The stoichiometric films grown at 200 degrees C showed a smooth surface morphology, highest density, and lowest impurity concentration. GST film was selectively grown inside the contact hole having a TiN/W plug. (c) 2007 The Electrochemical Society.
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