 On the contrary, a neutral trap site, i.e.a site that is neutral when empty and charged (negatively for electrons) when filled, will not exhibit Poole-Frenkel effect.Among the others, Simmons has proposed an alternative to the classical model with shallow neutral traps and deep donors, capable to exhibit a bulk-limited conduction with a Schottky electric field dependence, even in presence of a Poole-Frenkel conduction mechanism, thus explaining the "anomalous Poole-Frenkel effect" revealed by Ta205 and SiO films.