Impact of post-deposition annealing on SiO2/SiC interfaces formed by plasma nitridation of the SiC surface and SiO2 deposition

被引：1
|
作者：
Fujimoto, Hiroki [1 ]
Kobayashi, Takuma [1 ]
Watanabe, Heiji [1 ]
机构：
[1] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
来源：
APPLIED PHYSICS EXPRESS | 2024年 / 17卷 / 11期
关键词：
silicon carbide; MOS interface; interface state density; 4H-SIC MOSFETS;
D O I：
10.35848/1882-0786/ad918f
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We examined the impact of post-deposition annealing (PDA) on SiO2/SiC structures formed by plasma nitridation of the SiC surface followed by sputter deposition of SiO2. The interface state density near the conduction band edge of SiC was reduced from about 2 x 10(12) to 1 x 10(11) eV(-1) cm(-2) as the CO2-PDA temperature increased from 1050 degrees C to 1250 degrees C. In addition, the sample treated by CO2-PDA exhibited substantially higher immunity against positive gate bias stress than the standard NO nitridation. Our findings indicate that defect passivation by CO2-PDA plays a crucial role in improving the performance and reliability of SiC MOS devices formed by sputter-SiO2 deposition.
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页数：4
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