Abstract
Aluminum and nitrogen have been introduced asp- andn-type dopants, respectively, during chemical vapor deposition (CVD) ofα(6H)-SiC films on 6H-SiC substrates. The atomic concentration of each dopant in the films showed a linear dependence on partial pressure of the dopant source gas. The Al species exhibited ideal behavior based on a dilute solution model. Thus elemental Al and/or a complex containing only one Al atom were the principal species which contributed to the incorporation of this constituent. The incorporation of N was greater than expected from the dilute solution theory which implied interaction between N and Si in the SiC. The relationship between ionized dopant concentration (carrier concentration) and the concentration in each dopant source gas was also linear and parallel to its atomic concentration. The ratios of the carrier concentration to the atomic concentration for Al and N were 0.02 and 0.06, respectively.P-n junction diodes were fabricated which exhibited rectification and reverse leakage currents at 100 V of 0.19, 0.75, and 1.3 ΜA at 298, 523, and 623 K, respectively. The turn-on voltage decreased from 2.2 to 2.1 and 1.9 V with each incremental increase in temperature.
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References
H. B. Philipp and E. A. Taft, in Silicon Carbide, A High Temperature Semiconductor, J. R. O'Connor and J. Smiltens, eds., Pergamom, New York (1960), pp. 366–375.
W. v. Muench and I. Pfaffeneder, J. Appl. Phys.48, 4831 (1977).
G. A. Slack, J. Appl. Phys.35, 3460 (1964).
B. Wessels, H. C. Gatos and A. F. Witt, in Silicon Carbide-1973, R. C. Marshall, J. W. Faust, Jr. and C. E. Ryan, eds., University of South Carolina Press, Columbia, SC (1974), pp. 25–35.
S. Nishino, H. Matsunami and T. Tanaka, J. Cryst. Growth45, 144 (1978).
W. v. Muench and I. Pfaffeneder, Thin Solid Films31, 39 (1976).
J. A. Powell and H. A. Will, J. Appl. Phys.44, 5177 (1973).
H. S. Kong, H. J. Kim, J. A. Edmond, J. W. Palmour, J. Ryu, C. H. Carter, Jr., J. T. Glass and R. F. Davis, in Novel Refractory Semiconductors, Mater. Res. Soc. Symp. Proc., Vol. 97, T. Aselage, D. Emin and C. Wood, eds., Mater. Res. Soc, Pittsburgh, PA (1987), pp. 233–245.
N. Kuroda, K. Shibahara, W. Yoo, S. Nishino and H. Matsunami, in Extended Abstracts of the 19th Conference on Solid State Devices and Materials, Business Center for Academic Societies, Tokyo, Japan (1987), pp. 227–230.
H. S. Kong, J. T. Glass and R. F. Davis, J. Appl. Phys.64, 2672 (1988).
S. Nishino, A. Ibaraki, H. Matsunami and T. Tanaka, Jpn J. Appl. Phys.19, L353 (1980).
S. Yoshida, E. Sakuwa, S. Misawa and S. Gonda, J. Appl. Phys.55, 169 (1984).
K. Shibahara, N. Kuroda, S. Nishino and H. Matsunami, Jpn. J. Appl. Phys. Part 2,26, L1815 (1987).
M. Ikeda, H. Matsunami and T. Tanaka, J. Lumin.20, 111 (1979).
W. H. Shepherd, ibid.115, 541 (1968).
H. Reiss, J. Chem. Phys.21, 1209 (1953).
P. Rai-Choudhury and E. I. Salkovitz, J. Cryst. Growth7, 353 (1970).
H. J. Kim and R. F. Davis, J. Electrochem. Soc.133, 2350 (1986).
J. A. Lely, Ber. Deut. Keram. Ges.32, 229 (1955).
P. Liaw and R. F. Davis, J. Electrochem. Soc.132, 642 (1985).
J. W. Palmour, R. F. Davis, P. Astell-Burt, and P. Blackborow, in Silicon Carbide '87, Ceram. Trans. 1989, Vol. 2, D. Cawley and C. E. Semler, eds., Am. Ceramic Soc, Westervill, OH (1989), pp. 491–500.
G. A. Lomakina, Yu. A. Vodakov, E. N. Mokhov, C. G. Oding and G. F. Kholuyanov, Sov. Phys.-Solid State,12, 2356 (1971).
M. Mitomo, Y. Inomata and M. Kkumanomido, Yogyo-Kyokai-Shi78, 224 (1970).
Y. Tajima and W. D. Kingery, Commun. Am. Ceram. Soc.65, C27 (1982).
L.T. Kroko and Milnes, Solid State Electron.9, 1125 (1966).
A. R. Kieffer, P. Ettmayer, E. Gugel and A. Schmidt, Mater. Res. Bull.4, S153 (1969).
J. A. Lely, U.S. Pat. No. 2 854 364, 1955.
G. S. Kamath, Mater. Res. Bull.4, S57 (1969).
C. H. Carter, Jr., J. A. Edmond, J. W. Palmour, J. Ryu, H. J. Kim and R. F. Davis, in Microscopic Identification of Elec-tronic Defects in Semiconductors, Mater. Res. Soc. Symp. Proc., Vol. 46, N. M. Johnson, S. G. Bishop and G. Watkins, eds., North Holland, Amsterdam (1985), pp. 593–598.
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Wang, Y.C., Davis, R.F. & Edmond, J.A. Insitu incorporation of Al and N andp-n junction diode fabrication in alpha(6H)-SiC thin films. J. Electron. Mater. 20, 289–294 (1991). https://doi.org/10.1007/BF02657892
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DOI: https://doi.org/10.1007/BF02657892