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RF High-Power Operation of AlGaN/GaN HEMTs Epitaxially Grown on Diamond

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3 Author(s)
Hirama, K. ; NTT Basic Res. Labs., NTT Corp., Atsugi, Japan ; Kasu, M. ; Taniyasu, Yoshitaka

We epitaxially grow AlGaN/GaN high-electron-mobility transistors (HEMTs) on IIa-type single-crystal diamond (111) substrates. A 0.4-μm gate-length HEMT showed a dc drain-current density IDS of 770 mA/mm and a breakdown voltage of 165 V. In the RF large-signal measurements at 1 GHz, an RF output-power density POUT of 2.13 W/mm was obtained. This is the first report of RF power operation of AlGaN/GaN HEMTs epitaxially grown on diamond. The AlGaN/GaN HEMTs epitaxially grown on diamond showed a low thermal resistance of 1.5 K·mm/W.

Published in:

Electron Device Letters, IEEE  (Volume:33 ,  Issue: 4 )

Date of Publication:

April 2012

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