Electrical properties of N-polar AlGaN/GaN high electron mobility transistors grown on SiC by metalorganic chemical vapor deposition

David F. Brown, Rongming Chu, Stacia Keller, Steven P. Denbaars, Umesh K. Mishra

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Abstract

N-polar high electron mobility transistors (HEMTs) were fabricated from GaN/AlGaN/GaN heterostructures grown on n -type vicinal C-face SiC substrates by metalorganic chemical vapor deposition. The heterostructures had a sheet charge density and mobility of 6.6× 1012 cm-2 and 1370 cm2 V-1 s-1, respectively. HEMTs with a gate length of 0.7 μm had a peak transconductance of 135 mS/mm, a peak drain current of 0.65 A/mm, and a three-terminal breakdown voltage greater than 150 V. At a drain bias of 20 V, the current-gain and power-gain cutoff frequencies with the pad capacitances de-embedded were 17 and 33 GHz, respectively.

Original languageEnglish (US)
Article number153506
JournalApplied Physics Letters
Volume94
Issue number15
DOIs
Publication statusPublished - Apr 27 2009

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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