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

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
63589
Program Year/Program:
2003 / SBIR
Agency Tracking Number:
023732
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
SVT Associates
7620 Executive Drive Eden Prairie, MN 55344-3677
View profile »
Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2003
Title: High-Frequency, Low-Noise Nitride-Based Power Transistors Grown on Bulk III-N
Agency: NASA
Contract: NAS3-03019
Award Amount: $69,939.00
 

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.

Principal Investigator:

Amir Dabiran
Principal Investigator
9529342100
dabiran@svta.com

Business Contact:

Jane Marks
Project Manager
9529342100
marks@svta.com
Small Business Information at Submission:

SVT Associates, Inc.
7620 Executive Drive Eden Prairie, MN 55344

EIN/Tax ID: 411764876
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No