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arXiv 2107.08412physics.app-ph
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不同碳掺杂浓度的AlGaN/GaN HEMT的可靠性比较

Reliability comparison of AlGaN/GaN HEMTs with different carbon doping concentration

Z. Gao, M. Meneghini, F. Rampazzo, M. Rzin, C. De Santi, G. Meneghesso, E. Zanoni

摘要:

采用不同应力测试方法研究了Fe和C共掺杂的AlGaN/GAN HEMT在高、低碳掺杂浓度下的可靠性。首先讨论了室温下的直流和脉冲I-V特性,然后比较了不同栅压下的漏阶跃应力测试,最后讨论了不同偏置点下的恒定应力。结果表明,高C HEMT显示出减少的DIBL,更小的漏电流,以及减少的电场,导致在导通状态应力测试期间的鲁棒性提高,相对于参考。恒压应力下的失效模式包括漏电流和漏电流的降低,温度和电场加速了失效模式。

英文摘要:

The reliability of AlGaN/GaN HEMTs adopting Fe and C co-doping, with high and low carbon doping concentration was investigated by means of different stress tests. Firstly, DC and pulsed I-V characterization at room temperature are discussed, then drain step stress tests at different gate voltages are compared, afterwards, the constant stress at different bias points are discussed. Results show that the high C HEMTs showed reduced DIBL, smaller leakage current, as well as decreased electric field, leading to an improved robustness during on-state stress testing, with respect to the reference ones. Failure modes during constant voltage stress consists in a decrease of drain current and transconductance, accelerated by temperature and electric field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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