7Casady J B,Johnson R W. Status of silicon carbide(SiC) as a wide-bandgap semiconductor for high-temperature applications: A review[J].State Electronics, 1996,39 (10) : 1409
8Ueda Y, et al. Liquid phase homoepitaxial growth of 4H-SiC crystals and fabrication techniques of bluish-purple lightmitting diodes[J]. Mat Res Soc Symp Proc, 1990,162:427
9Amano H, Kito M. P-type conduction in Mg-doped GaN treated with low-energy electron beam irradiation (LEEBI)[J]. Jpn J Appl Phys, 1989,28(12) : L2112
10Nakamura S J, Mukai T. High-power GaN P-N juntion bluelight-emitting diodes[J].Jpn J Appl Phys, 1991,30(12A): L1998
