Impact of single trapped charge in gate-all-around nanowire channels studied by ensemble monte Carlo/Molecular dynamics simulation

T. Kamioka, H. Imai, T. Watanabe, K. Ohmori, K. Shiraishi, M. Niwa, K. Yamada, Y. Kamakura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Impact of a single trapped charge in an oxide layer on the carrier transport is numerically investigated for gate-allaround nanowire (GAA NW) channels, using the ensemble Monte Carlo / molecular dynamics simulation. The relative amplitude of current reduction caused by a single trapped charge increases in smaller NWs. This is due to the closer mean distance of carriers and the trapped charge in a downsized device, resulting increased impact of Coulomb scattering from the trapped charge to carriers. Under the same trap density, however, the smaller NWs show a decreasing tendency of the relative amplitude of current reduction if the current per NW is the same. Even in the practical operation conditions in which the current density per unit width is kept constant for each channel diameter, the relative amplitude of current reduction does not depend on the NW diameter. This indicates that the impact of the trapped charge on the relative amplitude of current reduction is determined by the trap density.

Original languageEnglish
Title of host publicationInternational Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2012 Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages11-14
Number of pages4
ISBN (Electronic)9780615717562
Publication statusPublished - 2012
Event2012 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2012 - Denver, United States
Duration: 2012 Sep 52012 Sep 7

Publication series

NameInternational Conference on Simulation of Semiconductor Processes and Devices, SISPAD

Conference

Conference2012 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2012
CountryUnited States
CityDenver
Period12/9/512/9/7

Keywords

  • Enesmble Monte Carlo/molecular dynamics (EMC/MD)
  • Gate-all-around nanowire
  • MOSFETs
  • Random telegraph noise

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Modelling and Simulation

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