MOS Interface Properties and MOSFET Performance on 4H-SiC{0001} and Non-Basal Faces Processed by N 2 O Oxidation
MOS Interface Properties and MOSFET Performance on 4H-SiC{0001} and Non-Basal Faces Processed by N 2 O Oxidation
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经过 N 2 O 氧化处理的 4H-SiC{0001} 和非基面的 MOS 界面特性和 MOSFET 性能
DOI:
10.1557/proc-815-j8.2
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
H. Matsunami
中科院分区:
文献类型:
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作者:
T. Kimoto;Y. Kanzaki;M. Noborio;H. Kawano;H. Matsunami
4H-SiC(0001), (000-1), and (11-20) have been directly oxidized by N 2 O at 1300°C, and the MOS interfaces have been characterized. The interface state density has been significantly reduced by N 2 O oxidation on any face, compared to conventional wet O 2 oxidation at 1150°C. Planar n-channel MOSFETs fabricated on lightly-doped 4H-SiC(0001), (000-1) and (11-20) faces have shown an effective channel mobility of 26, 43, and 78 cm 2 /Vs, respectively. The mobility decreased with increasing the doping concentration of p-body. SIMS analyses have revealed a clear pile-up of nitrogen atoms near the MOS interface. The thickness of interfacial SiC x O y layer can be decreased by utilizing N 2 O oxidation. The crystal face dependence of interface structure is discussed.
DOI:
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