We present a comprehensive characterization of amorphous alumina (a-Al2O3) high- k dielectric in metal-insulator-metal (MIM) stacks, self-consistently extracting the space-energy distribution of a-Al2O3 atomic defects and the related bond-breaking process parameters. Active defects are profiled via simultaneous simulation of current-voltage ( I- V), capacitance-voltage ( CV), conductance-voltage (GV) (i.e., defect spectroscopy), and low-field I- V hysteresis analysis. The defect energies extracted ( ETH = 1.55 and 3.55 eV) are consistent with oxygen vacancies and aluminum interstitials. The voltage-dependent dielectric breakdown (VDDB) statistics of a-Al2O(3) is investigated using ramped voltage stress (RVS). The VDDB statistics show a complex and polaritydependent breakdown statistics, correlating with defect distributions, which allows estimating the a-Al2O3 bondbreaking parameters with the support of multiscale atomistic simulations of the breakdown process.

Atomic Defects Profiling and Reliability of Amorphous Al2O3 Metal–Insulator–Metal Stacks / Torraca, P. La; Caruso, F.; Padovani, A.; Tallarida, G.; Spiga, S.; Larcher, L.. - In: IEEE TRANSACTIONS ON ELECTRON DEVICES. - ISSN 0018-9383. - 69:7(2022), pp. 3884-3891. [10.1109/TED.2022.3172928]

Atomic Defects Profiling and Reliability of Amorphous Al2O3 Metal–Insulator–Metal Stacks

Padovani, A.;Larcher, L.
2022

Abstract

We present a comprehensive characterization of amorphous alumina (a-Al2O3) high- k dielectric in metal-insulator-metal (MIM) stacks, self-consistently extracting the space-energy distribution of a-Al2O3 atomic defects and the related bond-breaking process parameters. Active defects are profiled via simultaneous simulation of current-voltage ( I- V), capacitance-voltage ( CV), conductance-voltage (GV) (i.e., defect spectroscopy), and low-field I- V hysteresis analysis. The defect energies extracted ( ETH = 1.55 and 3.55 eV) are consistent with oxygen vacancies and aluminum interstitials. The voltage-dependent dielectric breakdown (VDDB) statistics of a-Al2O(3) is investigated using ramped voltage stress (RVS). The VDDB statistics show a complex and polaritydependent breakdown statistics, correlating with defect distributions, which allows estimating the a-Al2O3 bondbreaking parameters with the support of multiscale atomistic simulations of the breakdown process.
2022
69
7
3884
3891
Atomic Defects Profiling and Reliability of Amorphous Al2O3 Metal–Insulator–Metal Stacks / Torraca, P. La; Caruso, F.; Padovani, A.; Tallarida, G.; Spiga, S.; Larcher, L.. - In: IEEE TRANSACTIONS ON ELECTRON DEVICES. - ISSN 0018-9383. - 69:7(2022), pp. 3884-3891. [10.1109/TED.2022.3172928]
Torraca, P. La; Caruso, F.; Padovani, A.; Tallarida, G.; Spiga, S.; Larcher, L.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1281039
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