中国物理B ›› 2023, Vol. 32 ›› Issue (12): 127102-127102.doi: 10.1088/1674-1056/acd8a1
Yuwei Zhou(周雨威)1, Minhan Mi(宓珉瀚)2,†, Pengfei Wang(王鹏飞)2, Can Gong(龚灿)2, Yilin Chen(陈怡霖)1, Zhihong Chen(陈治宏)2, Jielong Liu(刘捷龙)1, Mei Yang(杨眉)1, Meng Zhang(张濛)2, Qing Zhu(朱青)2, Xiaohua Ma(马晓华)2, and Yue Hao(郝跃)2
Yuwei Zhou(周雨威)1, Minhan Mi(宓珉瀚)2,†, Pengfei Wang(王鹏飞)2, Can Gong(龚灿)2, Yilin Chen(陈怡霖)1, Zhihong Chen(陈治宏)2, Jielong Liu(刘捷龙)1, Mei Yang(杨眉)1, Meng Zhang(张濛)2, Qing Zhu(朱青)2, Xiaohua Ma(马晓华)2, and Yue Hao(郝跃)2
摘要: Improved radio-frequency (RF) power performance of InAlN/GaN high electron mobility transistor (HEMT) is achieved by optimizing the rapid thermal annealing (RTA) process for high-performance low-voltage terminal applications. By optimizing the RTA temperature and time, the optimal annealing condition is found to enable low parasitic resistance and thus a high-performance device. Besides, compared with the non-optimized RTA HEMT, the optimized one demonstrates smoother ohmic metal surface morphology and better heterojunction quality including the less degraded heterojunction sheet resistance and clearer heterojunction interfaces as well as negligible material out-diffusion from the barrier to the channel and buffer. Benefiting from the lowered parasitic resistance, improved maximum output current density of 2279 mA·mm-1 and higher peak extrinsic transconductance of 526 mS·mm-1 are obtained for the optimized RTA HEMT. In addition, due to the superior heterojunction quality, the optimized HEMT shows reduced off-state leakage current of 7×10-3 mA·mm-1 and suppressed current collapse of only 4%, compared with those of 1×10-1 mA·mm-1 and 15% for the non-optimized one. At 8 GHz and VDS of 6 V, a significantly improved power-added efficiency of 62% and output power density of 0.71 W·mm-1 are achieved for the optimized HEMT, as the result of the improvement in output current, knee voltage, off-state leakage current, and current collapse, which reveals the tremendous advantage of the optimized RTA HEMT in high-performance low-voltage terminal applications.
中图分类号: (III-V semiconductors)