The effects of H-2 or N-2 plasma exposure on the current-voltage characteristics of GaN Schottky diodes were examined as a function of source power and rf chuck power. Under all conditions there was a strong reduction in diode reverse breakdown voltage and an increase in forward and reverse currents, The results are consistent with creation of a thin (less than or equal to 600 Angstrom) n-type conducting surface region after ion bombardment of the GaN surface. Much of the degradation in diode quality can be recovered by annealing in N-2 at 750 degrees C. (C) 1999 American Vacuum Society. [S0734-211X(99)06804-3].
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Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
Kato, M.
Mikamo, K.
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Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
Mikamo, K.
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Ichimura, M.
Kanechika, M.
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Toyota Central R and D Laboratories, Inc., Nagakute, Aichi, 480-1192, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
Kanechika, M.
Ishiguro, O.
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Toyota Central R and D Laboratories, Inc., Nagakute, Aichi, 480-1192, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
Ishiguro, O.
Kachi, T.
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Toyota Central R and D Laboratories, Inc., Nagakute, Aichi, 480-1192, JapanDepartment of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan