Characterization of transient behavior of AlGaN/GaN HEMTs

T. Mizutani

doi:10.1117/12.697685

8 February 2007 Characterization of transient behavior of AlGaN/GaN HEMTs

T. Mizutani

Proceedings Volume 6473, Gallium Nitride Materials and Devices II; 64731L (2007) https://doi.org/10.1117/12.697685
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

We have studied transient behavior of AlGaN/GaN high electron mobility transistors (HEMTs) using various kinds of measurement techniques such as frequency dispersion of the drain conductance, low-frequency noise, drain current DLTS, and Kelvin probe force microscopy. It has been shown that the frequency dispersion has a correlation with the low-frequency noise. In order to study the transient behavior of the device in more detail, the drain current DLTS was applied to various types of HEMTs. Even though electron-trap-related negative peaks were observed for all types of devices, surface-states-related positive peaks were observed only for devices without Si₃N₄ passivation film. It has been shown by KFM measurement that the surface potential of the device which was subjected to the gate bias stress increased with time due to the emission of electrons which were captured at the surface states. These phenomena are consistent with the current collapse model where the collapse is caused by the electrons which are injected from the gate electrode and captured at the surface states.

Citation Download Citation

T. Mizutani "Characterization of transient behavior of AlGaN/GaN HEMTs", Proc. SPIE 6473, Gallium Nitride Materials and Devices II, 64731L (8 February 2007); https://doi.org/10.1117/12.697685

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available