Vertical Leakage/Breakdown Mechanisms in AlGaN/GaN-on-Si Devices

被引:159
|
作者
Zhou, Chunhua [1 ]
Jiang, Qimeng [1 ]
Huang, Sen [1 ]
Chen, Kevin J. [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China
关键词
AlGaN/GaN high-electron-mobility transistors (HEMTs); silicon substrate; space-charge-limited current (SCLC) conduction; traps; vertical breakdown; CHARGE-LIMITED CURRENTS; CURRENT COLLAPSE; TRAPS; BUFFER;
D O I
10.1109/LED.2012.2200874
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Vertical leakage/breakdown mechanisms in AlGaN/GaN high-electron-mobility transistors grown on low-resistivity p-type (111) Si substrate are studied by temperature-dependent current-voltage (I-V) measurements. It is found that the top-to-substrate vertical breakdown voltage (BV) is dominated by the space-charge-limited current conduction involving both acceptor and donor traps in the GaN buffer/transition layer. From the temperature-dependent transient backgating measurements, the acceptor level at E-V + 543 meV and the donor level at E-C-616 meV were identified.
引用
收藏
页码:1132 / 1134
页数:3
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