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Improved breakdown voltage and impact ionization in InAlAs/InGaAs metamorphic high-electron-mobility transistor with a liquid phase oxidized InGaAs gate

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5 Author(s)
Kuan-Wei Lee ; Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, Tainan 701, Taiwan ; Nan-Ying Yang ; Mau-Phon Houng ; Yeong-Her Wang
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The In0.52Al0.48As/In0.53Ga0.47As metal-oxide-semiconductor metamorphic high-electron-mobility transistors (MOS-MHEMTs) with a thin InGaAs native oxide layer (∼10–15 nm) are demonstrated. The gate dielectric is directly obtained by oxidizing InGaAs material in a liquid phase solution. As compared to its counterpart MHEMTs, the MOS-MHEMTs have larger gate swing voltages, higher gate-to-drain breakdown voltages, and lower gate leakage currents with the suppressed impact ionization effect due to its higher barrier height.

Published in:

Applied Physics Letters  (Volume:87 ,  Issue: 26 )

Date of Publication:

Dec 2005

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