TITLE

Anisotropies in magnetron sputtered carbon nitride thin films

AUTHOR(S)
Hellgren, Niklas; Johansson, Mats P.; Broitman, Esteban; Hultman, Lars; Sundgren, Jan-Eric
PUB. DATE
April 2001
SOURCE
Applied Physics Letters;4/30/2001, Vol. 78 Issue 18, p2703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Carbon nitride CN[sub x] (0≤x≤0.35) thin films, deposited by reactive dc magnetron sputtering in Ar/N[sub 2] discharges have been studied with respect to microstructure using electron microscopy, and elastic modulus using nanoindentation and surface acoustic wave analyses. For growth temperature of 100 °C, the films were amorphous, and with an isotropic Young's modulus of ∼170-200 GPa essentially unaffected by the nitrogen fraction. The films grown at elevated temperatures (350-550 °C) show anisotropic mechanical properties due to a textured microstructure with standing basal planes, as observed from measuring the Young's modulus in different directions. The modulus measured in the plane of the film was ∼60-80 GPa, while in the vertical direction the modulus increased considerably from ∼25 to ∼200 GPa as the nitrogen content was increased above ∼15 at. %. © 2001 American Institute of Physics.
ACCESSION #
4711344

 

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