Paper Title:
Advances in AlGaN/GaN/SiC Microwave Devices
  Abstract

Recent work on the thermal and electrical challenges in realizing AlGaN/GaN microwave heterojunction field effect transistors grown on SiC substrates is discussed. Raman thermography has been used to directly measure the self-heating induced lattice temperature rise with dramatically improved resolution and accuracy compared to traditional infrared techniques. It is demonstrated that defects in the SiC substrate can influence the temperature distribution within the active device with potential consequences for reliability. Microwave devices require an insulating GaN substrate material for device isolation. It is shown that the net deep level acceptor concentration has to be accurately controlled to suppress short-channel effects and to achieve radio frequency power efficient operation.

  Info
Periodical
Materials Science Forum (Volumes 556-557)
Edited by
N. Wright, C.M. Johnson, K. Vassilevski, I. Nikitina and A. Horsfall
Pages
1017-1022
DOI
10.4028/www.scientific.net/MSF.556-557.1017
Citation
M. J. Uren, M. Kuball, "Advances in AlGaN/GaN/SiC Microwave Devices", Materials Science Forum, Vols. 556-557, pp. 1017-1022, 2007
Online since
September 2007
Export
Price
$32.00
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