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An effective-field approach for the Fowler–Nordheim tunneling current through a metal–oxide–semiconductor charged barrier

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3 Author(s)
Miranda, E. ; Laboratorio de Fı´sica de Dispositivos, Facultad de Ingenieria, Universidad de Buenos Aires, Paseo Colón 850, 1063-Buenos Aires, Argentina ; Redin, G. ; Faigon, A.

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The tunneling current through the gate insulator of a poly Si–SiO2–Si structure with trapped charge within the oxide is described by a modified Fowler–Nordheim expression, in which the cathode electric field is substituted by the local electric field in the insulator corresponding to the Fermi energy at the injecting electrode. Trap creation in the oxide was induced by a high-field constant current injection, and the flatband voltage and the tunneling current were measured after reaching the steady states corresponding to different applied gate voltages. The trapped charge is considered to be uniformly distributed within the insulator and its value is calculated from the flatband voltage shift. The proposed model applies for positive gate injection regardless of the stress polarity used for sample degradation. © 1997 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:82 ,  Issue: 3 )