Materials Science Forum, Vol.389-3, 165-170, 2002
Recent achievements and future challenges in SiC homoepitaxial growth
Recent progress in SiC homoepitaxial growth at the authors' roup is reviewed. The background doping and deep trap concentrations have been reduced to 2 x 10(13) cm(-3) and 4 x 10(10) cm(-3), respectively, for 4H-SiC(0001) epilayers; grown by horizontal hot-wall CVD. High-temperature growth by chimney-type vertical hot-wall CVD has resulted in a high growth rate of 25 mum/h and a low doping concentration of 1 x 10(13) cm(-3) or less. A novel crystal orientation, 4H-SiC(03 (3) over bar8), is proposed as an attractive alternative, and is compared with off-axis (0001) and (11 (2) over bar0) from viewpoints of crystal growth and impurity doping. Remaining issues in SiC epitaxy are discussed.