Epitaxial overgrowth of13C diamond films on diamond substrates predamaged by ion implantation
作者:
D. Behr,
R. Locher,
J. Wagner,
P. Koidl,
V. Richter,
R. Kalish,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 81,
issue 4
页码: 1720-1725
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.364029
出版商: AIP
数据来源: AIP
摘要:
Homoepitaxial chemical vapor deposited (CVD)13C diamond films were grown on 〈100〉 diamond substrates predamaged by implantation with 620 keV Xe ions. The structural quality of the overgrown films was analyzed by plain-view and cross-sectional micro-Raman spectroscopy. Implantation doses below 2×1014cm−2, for which no damage detectable by Raman spectroscopy was observed in the substrate, had no effect on the quality of the overgrown films. For doses around 4×1014cm−2, a pronounced predamage of the diamond substrate was found which had a strong degrading effect on the quality of the overgrown layer resulting in a drastic increase of the width of the optic zone-center phonon and in the appearance of Raman scattering from sp2-bonded carbon. Higher implantation doses up to 1×1015cm−2resulted in a complete etch removal of the predamaged graphitic surface layer during the initial phase of CVD growth, which thus had no effect on the quality of the film produced by the subsequent overgrowth. ©1997 American Institute of Physics.
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