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1/f Noise in the Tunneling Current of thin Gate Oxides

  • G. B. Alers (a1), D. Monroe (a1), K. S. Krisch (a1), B. E. Weir (a1) and A. M. Chang (a1)...


We have observed fluctuations in the tunneling current through 3.5 nm gate oxides with a 1/f power spectrum where f is the frequency. For voltages in the direct tunneling regime we lind an anomalous current dependence of the noise relative to previous observations of noise in thin oxides. We present a simplified model for the current noise in terms of fluctuations in a trap assisted tunneling current that exists in the oxide in addition to the direct tunneling current. Current noise appears to be a very sensitive probe of trap assisted tunneling and degradation in oxides.



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  • EISSN: 1946-4274
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