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 300∘C, and the fluence was fixed at 1015 e/cm2. For most experimental conditions, the threshold voltage (VTH) is observed to recover partially during 100∘C and the saturation voltage (VCEsat) increase is most pronounced at 100∘C. 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