Abstract
High-power microwave damage to enhanced-mode GaN high electron mobility transistors (HEMT) is studied considering the mechanical-electrical synergy effect due to the strong piezoelectric properties of GaN, which has a wurtzite crystal structure. Based on the piezoelectric constitutive equation, the mechanical and electrical energies were equivalently coupled, and the effective numerical model was built in the simulation software The results indicated that a part of the electrical energy was stored in the device as a form of elastic energy, causing the burnout time of GaN HEMT to be extended. The effects of different injection voltages and frequencies were analyzed, and the results revealed that elastic energy plays a different role during the process of device damage. These results are of great significance for the design of GaN HEMTs with better reliability in harsh electromagnetic environments and for improving their protection design.
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This work was supported by the National Natural Science Foundation of China (Grant No. 61974116), the Innovation Fund of Xidian University (Grant No. YJSJ23019), the Fundamental Research Funds for the Central Universities (Grant No. ZYTS23029), and the China Postdoctoral Science Foundation (Grant No. 2019M663927XB).
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Wang, L., Chai, C., Zhao, T. et al. Mechanical-electrical synergy damage effect on GaN HEMT under high-power microwave. Sci. China Technol. Sci. 66, 2373–2380 (2023). https://doi.org/10.1007/s11431-023-2407-3
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DOI: https://doi.org/10.1007/s11431-023-2407-3