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@ARTICLE{Feste:8894,
author = {Feste, S. F. and Knoch, J. and Buca, D. and Zhao, Q. T. and
Breuer, U. and Mantl, S.},
title = {{F}ormation of steep, low {S}chottky-barrier contacts by
dopant segregation during nickel silicidation},
journal = {Journal of applied physics},
volume = {107},
issn = {0021-8979},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-8894},
pages = {044510-6},
year = {2010},
note = {The authors thank their former colleague Dr. M. Zhang for
discussions and his valuable comments. This research has
received Nanosil funding from the European Community (FP7,
Grant No. 216171) and from the German Federal Ministry of
Education via the MEDEA + project DECISIF (Grant No.
2T104).},
abstract = {We present a systematic analysis of arsenic dopant
segregation during nickel silicide formation. The slopes and
concentrations of the arsenic dopant profiles at the NiSi/Si
interface have been studied as a function of implantation
energy, implantation dose, and NiSi thickness. Silicidation
induced dopant segregation conserves the dopant slope at the
silicide/silicon interface up to NiSi thicknesses of three
times the as-implanted peak depth before degrading. Best
slopes and highest dopant concentrations are obtained for
low implantation energies and thin NiSi layers. We also
demonstrate that the steepness of the dopant profile at the
NiSi/Si interface can be significantly improved through a
two-step annealing process for NiSi formation. For As, 1
keV, 1x10(15) cm(-2), and a 17 nm NiSi layer, a NiSi/Si
junction with a dopant slope of 3.2 nm/decade has been
obtained. An effective Schottky barrier of Phi(SB)=0.12 eV
was determined by low temperature measurements of Schottky
diodes with 20 nm NiSi formed by an optimized annealing
process.},
keywords = {J (WoSType)},
cin = {ZCH / IBN-1 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)ZCH-20090406 / I:(DE-Juel1)VDB799 /
$I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien /
NANOSIL - Silicon-based nanostructures and nanodevices for
long term nanoelectronics applications (216171)},
pid = {G:(DE-Juel1)FUEK412 / G:(EU-Grant)216171},
shelfmark = {Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000275028900099},
doi = {10.1063/1.3284089},
url = {https://juser.fz-juelich.de/record/8894},
}