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| Home > Publications database > 20 nm Gate length Schottky MOSFETs with ultra-thin NiSi/epitaxial NiSi2 source/drain |
| Journal Article | PreJuSER-111886 |
; ; ; ; ;
2012
Pergamon, Elsevier Science
Oxford [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.sse.2011.10.026
Abstract: Schottky barrier (SB)-MOSFETs with NiSi and epitaxial NiSi2 S/D contacts with gate lengths as small as 20 nm are presented. Epitaxial NiSi2 FETs show higher on-currents than corresponding NiSi devices due to its lower SB height. A striking observation is that tunnelling currents through the fairly large SB decrease at very short gate lengths in SB-MOSFETs, in contrast to the scaling behavior of conventional MOSFETs. Simulations indicate that the potential in the channel increases due to overlap of the high source and drain barriers with decreasing gate length, leading to lower currents. Boron implantation into the silicide (IIS) was used to lower the SBH. Devices with epitaxial NiSi2 show an improved performance after barrier lowering by (IIS). It is shown, that the parasitic potential increase of the two S/D Schottky barriers can be either minimized by IIS and by enhanced gate control due to EOT scaling using high-k as the gate oxide. (C) 2011 Elsevier Ltd. All rights reserved.
Keyword(s): J ; Schottky-MOSFET (auto) ; High-k (auto) ; Scaling (auto) ; NiSi (auto) ; Epitaxial NiSi2 (auto) ; Short channel effects (auto) ; Silicide source/drain (auto) ; Implantation into silicide (auto) ; Dopant segregation (auto)
; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; JCR ; Nationallizenz
; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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