中国物理B ›› 2020, Vol. 29 ›› Issue (3): 37201-037201.doi: 10.1088/1674-1056/ab696b
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Tao-Tao Que(阙陶陶), Ya-Wen Zhao(赵亚文), Liu-An Li(李柳暗), Liang He(何亮), Qiu-Ling Qiu(丘秋凌), Zhen-Xing Liu(刘振兴), Jin-Wei Zhang(张津玮), Jia Chen(陈佳), Zhi-Sheng Wu(吴志盛), Yang Liu(刘扬)
Tao-Tao Que(阙陶陶)1, Ya-Wen Zhao(赵亚文)1, Liu-An Li(李柳暗)1, Liang He(何亮)2, Qiu-Ling Qiu(丘秋凌)1, Zhen-Xing Liu(刘振兴)1, Jin-Wei Zhang(张津玮)1, Jia Chen(陈佳)1, Zhi-Sheng Wu(吴志盛)1, Yang Liu(刘扬)1
摘要: The effect of high overdrive voltage on the positive bias temperature instability (PBTI) trapping behavior is investigated for GaN metal-insulator-semiconductor high electron mobility transistor (MIS-HEMT) with LPCVD-SiNx gate dielectric. A higher overdrive voltage is more effective to accelerate the electrons trapping process, resulting in a unique trapping behavior, i.e., a larger threshold voltage shift with a weaker time dependence and a weaker temperature dependence. Combining the degradation of electrical parameters with the frequency-conductance measurements, the unique trapping behavior is ascribed to the defect energy profile inside the gate dielectric changing with stress time, new interface/border traps with a broad distribution above the channel Fermi level are introduced by high overdrive voltage.
中图分类号: (III-V and II-VI semiconductors)