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• W4380048900 abstract "In this work, a dramatic reduction in current collapse is achieved in GaN-based high-electron-mobility transistors (HEMTs) using dual-layer SiNx stressor passivation (DSSP), and the related mechanism is proposed. The SiNx compression neutralizes the inherent piezo polarization caused by the lattice mismatch at the heterojunction and effectively mitigates the peak electric field crowding at the drain-side gate edge, as supported by technology computer-aided design simulation. Thus, the inverse piezoelectric effect is suppressed and the trapped charge density is reduced under high electrical stress. As a result, the current collapse effect can be significantly restrained. Upon pulsing (Vg = −6 and Vds = 20 V), the device with DSSP exhibits a negligible current collapse (∼3%), which is significantly lower than the baseline device (∼34%). Moreover, it shows a one-order-of-magnitude reduction in gate leakage and a significant enhancement in gate stability. These results prove that the DSSP process is an attractive technique to facilitate high-reliability GaN-on-Si HEMTs." @default.
• W4380048900 created "2023-06-10" @default.
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• W4380048900 date "2023-06-05" @default.
• W4380048900 modified "2023-09-27" @default.
• W4380048900 title "Current collapse suppression in AlGaN/GaN HEMTs using dual-layer SiNx stressor passivation" @default.
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• W4380048900 doi "https://doi.org/10.1063/5.0135074" @default.
• W4380048900 hasPublicationYear "2023" @default.
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