Extrinsic and Intrinsic Performance of Vertical InAs Nanowire MOSFETs on Si Substrates

Karl-Magnus Persson, Martin Berg, Mattias Borg, Jun Wu, Sofia Johansson, Johannes Svensson, Kristofer Jansson, Erik Lind, Lars-Erik Wernersson

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Abstract

This paper presents DC and RF characterization as
well as modeling of vertical InAs nanowire MOSFETs with LG =
200 nm and Al2O3/HfO2 high-κ dielectric. Measurements at VDS =
0.5 V show that high transconductance (gm = 1.37 mS/μm), high
drive current (IDS = 1.34 mA/μm), and low on-resistance (RON =
287 Ωμm) can be realized using vertical InAs nanowires on Si
substrates. By measuring the 1/f-noise, the gate area normalized
gate voltage noise spectral density, SVG·LG·WG, is determined to
be lowered one order of magnitude compared to similar devices
with a high-κ film consisting of HfO2 only. Additionally, with a
virtual source model we are able to determine the intrinsic
transport properties. These devices (LG = 200 nm) show a high
injection velocity (vinj = 1.7·107 cm/s) with a performance
degradation for array FETs predominantly due to an increase in
series resistance.
Original languageEnglish
Pages (from-to)2761-2767
JournalIEEE Transactions on Electron Devices
Volume60
Issue number9
DOIs
Publication statusPublished - 2013

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering
  • Condensed Matter Physics

Free keywords

  • MOSFET
  • RF
  • InAs
  • Nanowire (NW)

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