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Beem and UHV-TEM Studies of PtSi/Si(001)

Published online by Cambridge University Press:  15 February 2011

K. L. Kavanagh ,
B. A. Morgan ,
A. A. Talin ,
K. M. Ring ,
R. S. Williams ,
M. C. Reuter  and
R. M. Tromp
K. L. Kavanagh
Affiliation:
ECE Dept., University of California, San Diego, La Jolla, CA 92093-0407
B. A. Morgan
Affiliation:
ECE Dept., University of California, San Diego, La Jolla, CA 92093-0407
A. A. Talin
Affiliation:
Chemistry and Materials Science Depts., University of California, Los Angeles, CA
K. M. Ring
Affiliation:
ECE Dept., University of California, San Diego, La Jolla, CA 92093-0407
R. S. Williams
Affiliation:
Chemistry and Materials Science Depts., University of California, Los Angeles, CA
M. C. Reuter
Affiliation:
IBM T. J. Watson Research Center, Yorktown Heights, NY 10598
R. M. Tromp
Affiliation:
IBM T. J. Watson Research Center, Yorktown Heights, NY 10598
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Abstract

Recent work using ballistic electron emission microscopy (BEEM) and ultra-high vacuum transmission electron microscopy (UHV-TEM) to study structure-property correlations of PtSi/Si(001) contacts is described. The spatial uniformity of the Schottky barrier height (SBH) for diodes grown at room temperature and 350°C was compared with the interface microstructure using TEM. Narrow SBH distributions with standard deviations of 7–12 meV were obtained independent of the deposition system and temperature. Analysis of the distributions compared well with standard current-voltage and capacitance-voltage measurements on the same diode. These low temperature depositions produced fine grained PtSi films (10–20 nm) with an interface roughness dependent on the cleaning process. Probable orientation effects on the SBH distribution were apparently screened out because of the low doping of the substrates that were used. As the deposition temperature is increased the PtSi tends towards polycrystalline epitaxy with island growth beginning at 700°C. Grains are rectangular and develop a large shape anisotropy of great interest for future investigations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 402: Symposium H – Silicide Thin Films-Fabrication, Properties and Applications , 1995 , 461
Copyright
Copyright © Materials Research Society 1996

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