In order to identify the factors controlling the filament characteristics, we perform physics-based simulations of the inherently stochastic and difficult-to-control forming process using a statistical Monte-Carlo method to model the Hf-O bond-breakage, oxygen ion diffusion and vacancy-oxygen recombination. Simulation results well reproduce the experimental trends observed for the conductivity of the post-forming low resistance state under different forming conditions. It is shown that the distribution of the oxygen ions in the surrounding oxide during forming as well as local filament temperature and electrical field all affect the filament stability.
Modeling the Effects of Different Forming Conditions on RRAM Conductive Filament Stability / B., Butcher; G., Bersuker; Vandelli, Luca; Padovani, Andrea; Larcher, Luca; A., Kalantarian; R., Geer; D. C., Gilmer. - ELETTRONICO. - (2013), pp. 52-55. (Intervento presentato al convegno 2013 5th IEEE International Memory Workshop, IMW 2013 tenutosi a Monterey, CA (USA) nel 26-29 Maggio 2013) [10.1109/IMW.2013.6582096].
Modeling the Effects of Different Forming Conditions on RRAM Conductive Filament Stability
VANDELLI, LUCA;PADOVANI, ANDREA;LARCHER, Luca;
2013
Abstract
In order to identify the factors controlling the filament characteristics, we perform physics-based simulations of the inherently stochastic and difficult-to-control forming process using a statistical Monte-Carlo method to model the Hf-O bond-breakage, oxygen ion diffusion and vacancy-oxygen recombination. Simulation results well reproduce the experimental trends observed for the conductivity of the post-forming low resistance state under different forming conditions. It is shown that the distribution of the oxygen ions in the surrounding oxide during forming as well as local filament temperature and electrical field all affect the filament stability.
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