Piezoelectric strain in AlGaN∕GaN heterostructure field-effect transistors under bias
- 6 March 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (10), 103502
- https://doi.org/10.1063/1.2182011
Abstract
Micro-Raman spectroscopy was used to study piezoelectric strain in heterostructure field-effect transistors under bias. The measurements were made through the transparent SiC substrate. Strain in the GaN layer varied over the device area and was dependent on bias voltage, and affected, in particular, the gate-drain gap and area underneath the drain contact. The observed strain in GaN was shown to be related to the electric field component normal to the surface. Finite element simulations of electric field distribution show good qualitative agreement with the experimental data. Effects of strain on Raman temperature measurements in transistors are also discussed.
This publication has 18 references indexed in Scilit:
- IP handover delay for host-based micromobility protocolsElectronics Letters, 2005
- Electromechanical coupling in free-standing AlGaN/GaN planar structuresJournal of Applied Physics, 2003
- Effect of electromechanical coupling on the strain in AlGaN/GaN heterojunction field effect transistorsJournal of Applied Physics, 2003
- Wide band gap semiconductor reliability : Status and trendsMicroelectronics Reliability, 2003
- Reliability Evaluation of High Power AlGaN/GaN HEMTs on SiC Substratephysica status solidi (a), 2001
- Influence of spontaneous and piezoelectric polarizations on the phonon frequencies in strained GaN/AlN superlatticesPhysical Review B, 2001
- Two dimensional electron gases induced by spontaneous and piezoelectric polarization in undoped and doped AlGaN/GaN heterostructuresJournal of Applied Physics, 2000
- Spontaneous polarization and piezoelectric constants of III-V nitridesPhysical Review B, 1997
- Converse piezoelectric effect in [111] strained-layer heterostructuresPhysical Review B, 1995
- The influence of the strain-induced electric field on the charge distribution in GaN-AlN-GaN structureJournal of Applied Physics, 1993