Physical model for enhanced interface-trap formation at low dose rates

Sergey Rashkeev, Claude R. Cirba, Daniel M. Fleetwood, Ronald D. Schrimpf, Steven C. Witczak, Alain Michez, Sokrates T. Pantelides

Research output: Contribution to journalArticle

186 Citations (Scopus)

Abstract

We describe a model for enhanced interface-trap formation at low dose rates due to space-charge effects in the base oxides of bipolar devices. The use of analytical models allows one to reduce significantly the number of free parameters of the theory and to elucidate the main physical mechanisms that are responsible for interface-trap and oxide-trap formation processes. We found that the hole trapping in the oxide cannot be responsible for all the enhanced low-dose-rate sensitivity (ELDRS) effects in SiO2, and the contribution of protons is also essential. The dynamics of interface-trap formation are defined by the relation between the proton mobility (transport time of the protons across the oxide) and the time required for positive-charge buildup near the interface due to trapped holes. The analytically estimated and numerically calculated interface-trap densities were found to be in very good agreement with available experimental data.

Original languageEnglish
Pages (from-to)2650-2655
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume49 I
Issue number6
DOIs
Publication statusPublished - 1 Dec 2002
Externally publishedYes

Fingerprint

traps
dosage
Protons
Oxides
oxides
protons
Electric space charge
Analytical models
space charge
trapping

Keywords

  • Bipolar transistors
  • Interface phenomena
  • Radiation effects
  • Space technology

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

Cite this

Rashkeev, S., Cirba, C. R., Fleetwood, D. M., Schrimpf, R. D., Witczak, S. C., Michez, A., & Pantelides, S. T. (2002). Physical model for enhanced interface-trap formation at low dose rates. IEEE Transactions on Nuclear Science, 49 I(6), 2650-2655. https://doi.org/10.1109/TNS.2002.805387

Physical model for enhanced interface-trap formation at low dose rates. / Rashkeev, Sergey; Cirba, Claude R.; Fleetwood, Daniel M.; Schrimpf, Ronald D.; Witczak, Steven C.; Michez, Alain; Pantelides, Sokrates T.

In: IEEE Transactions on Nuclear Science, Vol. 49 I, No. 6, 01.12.2002, p. 2650-2655.

Research output: Contribution to journalArticle

Rashkeev, S, Cirba, CR, Fleetwood, DM, Schrimpf, RD, Witczak, SC, Michez, A & Pantelides, ST 2002, 'Physical model for enhanced interface-trap formation at low dose rates', IEEE Transactions on Nuclear Science, vol. 49 I, no. 6, pp. 2650-2655. https://doi.org/10.1109/TNS.2002.805387
Rashkeev, Sergey ; Cirba, Claude R. ; Fleetwood, Daniel M. ; Schrimpf, Ronald D. ; Witczak, Steven C. ; Michez, Alain ; Pantelides, Sokrates T. / Physical model for enhanced interface-trap formation at low dose rates. In: IEEE Transactions on Nuclear Science. 2002 ; Vol. 49 I, No. 6. pp. 2650-2655.
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