中国物理B ›› 2016, Vol. 25 ›› Issue (3): 37306-037306.doi: 10.1088/1674-1056/25/3/037306
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Qing-Wen Song(宋庆文), Xiao-Yan Tang(汤晓燕), Yan-Jing He(何艳静), Guan-Nan Tang(唐冠男),Yue-Hu Wang(王悦湖), Yi-Meng Zhang(张艺蒙), Hui Guo(郭辉), Ren-Xu Jia(贾仁需),Hong-Liang Lv(吕红亮), Yi-Men Zhang(张义门), Yu-Ming Zhang(张玉明)
Qing-Wen Song(宋庆文)1,2, Xiao-Yan Tang(汤晓燕)2, Yan-Jing He(何艳静)2, Guan-Nan Tang(唐冠男)2,Yue-Hu Wang(王悦湖)2, Yi-Meng Zhang(张艺蒙)2, Hui Guo(郭辉)2, Ren-Xu Jia(贾仁需)2,Hong-Liang Lv(吕红亮)2, Yi-Men Zhang(张义门)2, Yu-Ming Zhang(张玉明)2
摘要: In this paper, the normally-off N-channel lateral 4H-SiC metal-oxide-semiconductor field-effect transistors (MOSFFETs) have been fabricated and characterized. A sandwich-(nitridation-oxidation-nitridation) type process was used to grow the gate dielectric film to obtain high channel mobility. The interface properties of 4H-SiC/SiO2 were examined by the measurement of HF I-V, G-V, and C-V over a range of frequencies. The ideal C-V curve with little hysteresis and the frequency dispersion were observed. As a result, the interface state density near the conduction band edge of 4H-SiC was reduced to 2×1011 eV-1·cm-2, the breakdown field of the grown oxides was about 9.8 MV/cm, the median peak field-effect mobility is about 32.5 cm2·V-1·s-1, and the maximum peak field-effect mobility of 38 cm2· V-1· s-1 was achieved in fabricated lateral 4H-SiC MOSFFETs.
中图分类号: (Electronic transport in interface structures)