Thermal effects were investigated to get a better understanding on the role of self-heating effects on the electrical characteristics of AlGaN/GaN HEMTs. This is implemented by solving simultaneously the acoustic and optical phonon energy balance equations and also takes into account the coupling of the two subsystems. The electro-thermal device simulator was used to observe the temperature profiles across the device. Hot spots or regions of higher temperatures were found along the channel in the gate-drain spacing. These preliminary results from the electro-thermal simulations suggest that the thermal effects do not have a drastic impact on the electrical characteristics, the current reduction falls between 5-10% over the simulated range of voltages. However, the non-equilibrium phonon effects might play an important role in determining the thermal distribution in these HEMTs and thus, resulting in reliability issues such as current collapse.

Original languageEnglish (US)
Title of host publicationLarge-Scale Scientific Computing - 7th International Conference, LSSC 2009, Revised Papers
Number of pages8
StatePublished - Jun 25 2010
Event7th International Conference on Large-Scale Scientific Computations, LSSC 2009 - Sozopol, Bulgaria
Duration: Jun 4 2009Jun 8 2009

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5910 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other7th International Conference on Large-Scale Scientific Computations, LSSC 2009

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)


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