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6. Conductivity and charge trapping after electrical stress in amorphous and polycrystalline Al2O3-based devices studied with AFM-related techniques

Author

Lanza, M., Porti, M., Nafria, M., Aymerich, X., Benstetter, G., Lodermeier, E., Ranzinger, H., Jaschke, G., Teichert, S., Wilde, L., Michalowski, P.P., and Publica

Abstract

In this paper, atomic force microscopy-based techniques have been used to study, at nanoscale, the dependence of the electrical properties of Al2O3 stacks for flash memories on the annealing temperature (T-A). The electrical characterization has been combined with other techniques (for example, transmission electron microscopy) that have allowed to investigate the dependence of the stack crystallization and the Si diffusion from the substrate to the gate oxide on T-A. The combination of both the analyses has allowed to explore if there is a relation between the percentage of diffused silicon and material crystallization with the conductivity and charge trapping of Al2O3 stacks.

Published
2011

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