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Updated: Feb 15, 2026

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Investigación sobre el refuerzo estructural de dispositivos AlGaN/GaN HEMT bajo estrés de RF

Xingjun Liu¹, Hongxia Liu², Mengwei Su³

¹Xidian University, Tai Bai road, Xi'an, Shaanxi, 710126, China.

|February 13, 2026

Abstract:

This study investigates the performance and reliability of AlGaN/GaN high electron mobility transistors (HEMTs) under radio frequency (RF) stress through a device-level simulation of a commercial power amplifier. By analyzing the electrical characteristics, breakdown voltage, and RF performance under normal operation and before/after RF stress, we examined the influence of key structural parameters on the device's resistance to RF stress. The parameters studied include the passivation layer thickness, the gate-to-drain to gate-to-source length ratio (Lgd:Lgs), and the buried gate depth. Specifically, an increase in the passivation layer thickness from 0.095 μm to 0.245 μm resulted in a relatively limited improvement in RF stress resistance of 3.45%. In contrast, a variation in Lgd:Lgs from 2:1 to 1:2 and an increase in the buried gate depth from 1 nm to 3 nm led to more pronounced enhancements of 38.3% and 44.4%, respectively. Finally, TCAD simulation results visually illustrate the extent of improvement in RF stress resistance achieved through each structural modification.

Palabras clave:

transistor de alta movilidad de electrones AlGaN/GaN (HEMT)Refuerzo estructura de puerta en T estrés de radiofrecuencia (RF)

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