Published March 2017 | Version v1
Journal article

Anomalous DC and RF behavior of virgin AlGaN/AlN/GaN HEMTs

Contributors

Others:

Description

The performance of gallium nitride transistors is still limited by technological problems often related to defects and traps. In this work, virgin AlGaN/AlN/GaN HEMTs exhibiting an anomalous DC behavior accompanied by frequency dispersion in the microwave range, both in the transconductance and output conductance, are analyzed. This anomalous response, which is mitigated by high-bias conditions, is attributed to the presence of traps and defects both in the volume of the GaN channel and in the source and drain contacts. A simple equivalent circuit model is proposed to replicate the dispersive response of the transistor, achieving an excellent agreement with the measured S-parameters and thus providing relevant information about its characteristic frequency.

Abstract

International audience

Additional details

Identifiers

URL
https://hal.archives-ouvertes.fr/hal-03270095
URN
urn:oai:HAL:hal-03270095v1

Origin repository

Origin repository
UNICA