Advanced performance and scalability of Si nanowire field-effect transistors analyzed using noise spectroscopy and gamma radiation techniques

High-quality Si nanowire field effect transistors (FETs) were fabricated using thermal nanoimprint and chemical wet etching technologies. FET structures of different lengths demonstrate high carrier mobility with values of about 750 cm2/Vs and low volume densities of active traps in the dielectric l...

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Bibliographic Details
Published in:Journal of applied physics 2013-11, Vol.114 (20)
Main Authors: Li, J, Vitusevich, SA, Petrychuk, M V, Pud, S, Offenhaeusser, A, Danilchenko, BA
Format: Article
Language:English
Subjects:
Biosensors
CARRIER MOBILITY
Channel noise
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Dependence
DIELECTRIC MATERIALS
FIELD EFFECT TRANSISTORS
Gamma irradiation
GAMMA RADIATION
Gamma rays
Nanocomposites
Nanomaterials
Nanowires
Noise
Organic chemistry
RELIABILITY
SCATTERING
Semiconductor devices
SPECTRA
SPECTROSCOPY
Spectrum analysis
Stability
Transistors
Transport properties
TRAPS
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Summary:High-quality Si nanowire field effect transistors (FETs) were fabricated using thermal nanoimprint and chemical wet etching technologies. FET structures of different lengths demonstrate high carrier mobility with values of about 750 cm2/Vs and low volume densities of active traps in the dielectric layers of 5 × 1017 cm−3 eV−1. We investigated the transport properties of these n-type channel structures using low-frequency noise spectroscopy before and after gamma radiation treatment. Before gamma irradiation, FET structures with lengths of less than 4 μm exhibited noise from contact regions with 1/(L2) dependence for the relative 1/f noise. After gamma radiation, the spectra reflected the priority of channel noise with 1/L dependence for all samples. The transport characteristics show that the fabricated nanowire FETs improved scalability, decreased parameter scattering, and increased stability after treatment. The results demonstrate that these nanowire FETs are promising for nanoelectronic and biosensor applications due to the cost-efficient technology and advanced performance of FETs with improved stability and reliability.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4833567