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垂直GaN-on-Si沟槽MOSFET关断状态偏置诱导不稳定性实验与数值分析

Experimental and Numerical Analysis of Off-State Bias Induced Instabilities in Vertical GaN-on-Si Trench MOSFETs

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中文摘要

本文分析了伪垂直GaN-on-Si沟槽MOSFET(TMOS)在关断状态应力下的阈值电压(VT)动态不稳定性。实验表明,关断应力会导致VT逐渐升高,且仅在高温循环后才能完全恢复,在室温下表现为永久性退化。

English Abstract

We analyzed the threshold-voltage dynamic instabilities induced by off-state stress in pseudo-vertical GaN-on-Si Trench mosfets (TMOS). Extensive measurements revealed that off-state stress experiments induce a progressive increase of threshold voltage (VT), that is fully recoverable only after high-temperature cycles, so that it can appear as permanent degradation at room temperature. VT increase...
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SunView 深度解读

GaN作为第三代宽禁带半导体,在提升功率密度和转换效率方面具有巨大潜力。该研究揭示了垂直GaN沟槽器件在关断状态下的阈值漂移机理,这对阳光电源未来在户用光伏逆变器及小型化储能PCS中引入高性能GaN器件至关重要。建议研发团队在评估GaN器件选型时,重点关注其在高温环境下的长期可靠性与阈值稳定性,并针对性优化驱动电路设计,以规避应力诱导的性能退化,确保产品在长寿命周期内的稳定运行。