Gradually buffered, delta-doped AlGaN/GaN/AlGaN Heterostructure Field-Effect Transistors

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$99,867.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
HQ0006-05-C-7205
Award Id:
74622
Agency Tracking Number:
044-1577
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1195 Atlas Road, Columbia, SC, 29209
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
135907686
Principal Investigator:
Qhalid Fareed
Senior Growth Engineer
(803) 647-9757
fareed@s-et.com
Business Contact:
Remis Gaska
President and CEO
(803) 647-9757
gaska@s-et.com
Research Institute:
n/a
Abstract
New structure GaN-based field effect transistors (FETs) are proposed to solve the problem. A composition graded buffer, aiming at eliminating dislocations arising from hetero-epitaxy interface and suppressing channel electrons spillover under negative gate bias, a Si-delta-doped GaN layer just below the two-dimensional electron gas (2DEG) channel, used for polarization fields screening as well as carrier supplier, are the major innovations of the new structure. We propose to use a composition-graded AlGaN transition layer in-between the AlN buffer and the GaN layer. This carefully designed transition layer will be insulating and can gradually accommodate the lattice mismatch between AlN and GaN, eliminating/alleviating the dislocation generation. The piled-up polarization fields, which could deplete the 2DEG channel, will be taken care of by inserting a Si-delta-doping layer in the vicinity to the channel. Simulations will be done to guide experiments and find out the interactions among the composition grading, polarization fields and Si-delta-doping (concentration and position).

* 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