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Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
We present model calculations for high-field electron transport in silicon dioxide based on recently measured energy-dependent electron-phonon scattering rates and impact ionization rates. We find a hot-electron runaway phenomenon in SiO2, acoustic-phonon runaway. This phenomenon occurs at electric fields exceeding 7 MV/cm, when acoustic-phonon scattering can no longer stabilize the hot electrons. A fraction of the electrons are accelerated in the electric field to energies high enough to generate electron-hole pairs by impact ionization. Simulated hole currents due to high-field impact ionization in SiO2 gate oxides with thicknesses greater than 200 A agree well with measured substrate hole currents in n-channel field-effect transistors. This suggests that these currents are due to holes generated by hot-electron impacts in the gate oxide. © 1992 The American Physical Society.
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
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