High Electrical Efficiency GaN FETs for Innovative Radar/RF Sensors

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$100,000.00
Award Year:
2006
Program:
SBIR
Phase:
Phase I
Contract:
W9113M-06-C-0064
Award Id:
78445
Agency Tracking Number:
053-1629
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
8829 Midway West Road, Raleigh, NC, 27617
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
020080607
Principal Investigator:
Drew Hanser
Chief Technology Officer
(919) 789-8880
hanser@kymatech.com
Business Contact:
Keith Evans
Chief Executive Officer
(919) 789-8880
evans@kymatech.com
Research Institution:
n/a
Abstract
Improving efficiency and reliability of GaN-based FETs is paramount in enabling system insertion, both of which are limited by thermal effects and self heating in the devices. One factor limiting high voltage and high efficiency operation of GaN HEMTs is leakage current between the gate and drain at high drain bias. Pure screw dislocations arising from the lattice mismatch at the SiC substrate and thread through the GaN and AlGaN epitaxial layers have been identified as a path for reverse-bias leakage currents in GaN. The availability of a low dislocation density GaN substrate would address these issues by reducing the dislocation density to 105 cm-2 or lower. The proposed Phase I SBIR effort will work to identify key factors in improving the efficiency, of GaN-based FET devices for application in radar systems. This program will investigate the impact of defects in and thermal conductivity of device structures on SiC and bulk GaN substrates. Thermal models of GaN-based FETs on GaN substrates with comparisons to SiC substrate-based devices will be used along with thermal imaging measurements of FET structures to identify critical factors in improving the efficiency and reliability of GaN-based FETs for radar and RF sensors.

* information listed above is at the time of submission.

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