High-Frequency, Low-Noise Nitride-Based Power Transistors Grown on Bulk III-N

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,939.00
Award Year:
2003
Program:
SBIR
Phase:
Phase I
Contract:
NAS3-03019
Award Id:
63589
Agency Tracking Number:
023732
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
7620 Executive Drive, Eden Prairie, MN, 55344
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Amir Dabiran
Principal Investigator
(952) 934-2100
dabiran@svta.com
Business Contact:
Jane Marks
Project Manager
(952) 934-2100
marks@svta.com
Research Institute:
n/a
Abstract
One of the main issues for III-nitride growth is the lack of a suitable native substrate. Growth on foreign substrates such as sapphire or SiC results in nitride material with a high density of defects due to large mismatches in lattice constant and thermal expansion. Nonetheless, nitride devices grown on these substrates have demonstrated optical and electronic properties that are practically unmatched by other material systems. In particular, the AlGaN/GaN high electron mobility transistors (HEMTs) constitute a leading candidate for simultaneously realizing ultrahigh-frequency low-noise amplifiers and power amplifiers. Here, we propose to use high quality bulk GaN and AlN substrates for substantial improvements in the operation of AlGaN/GaN HEMTs. We also propose a method of isolating the n-type substrate from the active layer. In this way, we take advantage of the reduced thermal and lattice mismatch, lower density of treading dislocations, and improved thermal conductance to significantly improve the dc and RF operation of these devices. Some projected HEMT device parameters to achieve are a current density > 1.5A/mm, extrinsic transconductance values > 400 mS/mm, fmax > 200 GHz, and power density > 10 W/mm at 40 GHz.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government