Growth and electrical characterization of 4H-SiC epilayers

被引:1
|
作者
Kimoto, T. [1 ]
Danno, K. [1 ]
Hori, T. [1 ]
Matsunami, H. [2 ]
机构
[1] Kyoto Univ, Dept Elect Sci & Engn, Nishikyo Ku, Kyoto 6158510, Japan
[2] Innovat Plaza Kyoto, JST, Kyoto 6158245, Japan
来源
关键词
chemical vapor deposition; fast epitaxy; basal plane dislocation; deep level; carbon vacancy;
D O I
10.4028/www.scientific.net/MSF.556-557.35
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Homoepitaxial growth of 4H-SiC and characterization of deep levels obtained mainly in the authors' group have been reviewed. The growth rate has been increased to 24 mu m/h with keeping very good surface morphology and low trap concentration on 8 degrees off-axis 4H-SiC(0001) by hot-wall chemical vapor deposition at 1650 degrees C. The increased growth rate has resulted in the enhanced conversion of basal-plane dislocations into threading edge dislocations in epilayers. The Z(1/2) and EH6/7 concentrations can be decreased to about 1x10(12) cm(-3) by increasing the C/Si ratio during CVD. Extensive investigation on as-grown and electron-irradiated epilayers indicates that both the Z(1/2) and EH6/7 centers may be attributed to the same origin related to carbon displacement, probably a carbon vacancy. Deep levels observed in as-grown and irradiated p-type 4H-SiC are also presented.
引用
收藏
页码:35 / +
页数:2
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