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Ion Beam Synthesis of IrSi3 by 1-MeV Ir Ion Implantation into Si(111)‡

Published online by Cambridge University Press:  03 September 2012

T. P. Sjoreen  and
H.- J. Hinneberg
T. P. Sjoreen
Affiliation:
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
H.- J. Hinneberg
Affiliation:
Forschungszentrum Jülich, Postfach 1913, 5170 Jülich, Germany
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Abstract

The formation of a Si/IrSi3/Si heterostructurie by 1-MeV Ir ion implantation and subsequent annealing has been studied for different doses (0.1-2.25 × 1017 Ir/cm2), substrate temperatures (450°-600°C) and annealing temperatures (1000°-1200°C) using Rutherford backscattering spectrometry, ion channeling and cross-sectional transmission electron microscopy. The heterostructure formation is observed to depend strongly on the processing conditions. The best structure, nearly continuous and precipitate-free, is obtained by implanting 1.8-2.0× 1017 1r/cm2 at a substrate temperature of 550°C and annealing at 1100°C for 5 h. A stoichiometric IrSi3 layer can also be produced by furnace annealing at 1150°C for 1 h or by rapid-thermal-annealing at 1200°C for 3 min. Other substrate temperatures generally lead to a structure with a discontinuous IrSi3 layer frequently interrupted by large surface precipitates or islands. The origin of these islands, as well as the dependence of the heterostructure on processing parameters, is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 320: Symposium D – Silicides, Germanides, and Their Interfaces , 1993 , 165
Copyright
Copyright © Materials Research Society 1994

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Footnotes

†

Present address: Technische Universitat Chemnitz-Zwickau, Postfach 964, 09009 Chemnitz, Germany

‡

Research sponsored by the Division of Materials Science, U. S. Department of Energy under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc.

References

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