Logarithmic behavior of degradation dynamics in metal--oxide semiconductor devices

Details Logarithmic behavior of degradation dynamics in metal--oxide semiconductor devices Logarithmic behavior of degradation dynamics in metal--oxide semiconductor devices

2010-02-18

arxiv.org/abs/1002.3571v1

Physics

Condensed Matter

Materials Science

Scientific paper

In this paper the authors describe a theoretical simple statistical modelling of relaxation process in metal-oxide semiconductor devices that governs its degradation. Basically, starting from an initial state where a given number of traps are occupied, the dynamics of the relaxation process is measured calculating the density of occupied traps and its fluctuations (second moment) as function of time. Our theoretical results show a universal logarithmic law for the density of occupied traps $\bar{} \sim \phi (T,E_{F}) (A+B \ln t)$, i.e., the degradation is logarithmic and its amplitude depends on the temperature and Fermi Level of device. Our approach reduces the work to the averages determined by simple binomial sums that are corroborated by our Monte Carlo simulations and by experimental results from literature, which bear in mind enlightening elucidations about the physics of degradation of semiconductor devices of our modern life.

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