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Effects of high temperature electron irradiation on trench-IGBT

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Abstract

The degradation of the electrical properties of IGBTs (Insulated-Gate Bipolar Transistors) by 2-MeV electron irradiation at high-temperatures was studied. The irradiation temperatures were 25, 100, 200 and 300C, and the fluence was fixed at 1015 e/cm2. For most experimental conditions, the threshold voltage (VTH) is observed to recover partially during 100C and the saturation voltage (VCEsat) increase is most pronounced at 100C. It is shown that in this irradiation temperature range, the temperature dependency of the voltage shift due to the radiation-induced interface traps (Δ Vit) and the voltage shift due to the radiation-induced oxide traps (Δ Vot) are different, which suggests a possible degradation mechanism for these phenomena. It is tentatively suggested that the diffusion of hydrogen released from the gate by the 2-MeV electrons passivates the interface traps during the high temperature irradiation.

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Nakabayashi, M., Ohyama, H., Hanano, N. et al. Effects of high temperature electron irradiation on trench-IGBT. J Mater Sci: Mater Electron 16, 463–467 (2005). https://doi.org/10.1007/s10854-005-2319-z

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  • DOI: https://doi.org/10.1007/s10854-005-2319-z

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