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Development of Low Stress Ohmic Contacts to HgCdTe

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
73960
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
A052-099-1062
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
EPIR Technologies Inc
590 Territorial Drive, Suite B Bolingbrook, IL -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2005
Title: Development of Low Stress Ohmic Contacts to HgCdTe
Agency / Branch: DOD / ARMY
Contract: W15P7T-06-C-T003
Award Amount: $69,967.00
 

Abstract:

The problem to be solved in the proposed work is that the deposition of the usual In and Au metal contacts on HgCdTe-based IR detectors creates additional stress in the HgCdTe immediately below the contacts, This stress has been observed to getter threading dislocations, which, in turn, creates misfit dislocation segments just below the detector surface and parallel to the surface, in the active area under and close to the contacts. The dangling bonds across these dislocations enhance random generation-recombination processes, thereby reducing quantum efficiencies and detectivities. Because of their location, these misfit dislocations act as especially efficient trapping and recombination centers and strongly degrade detector performance, especially in the long wavelength and very long wavelength ranges. They degrade the zero-bias impedance (R0A) and increase the dark current. The dangling bonds across these dislocations enhance random generation-recombination processes, thereby reducing quantum efficiencies and detectivities. We propose to eliminate or greatly reduce this gettering of threading dislocations and the resultant formation of misfit dislocations by contact deposition on HgCdTe long wavelength infrared (LWIR) detectors.

Principal Investigator:

Paul Boieriu
Senior Engineer
6307710203
pboieriu@epir.com

Business Contact:

Sivalingam Sivananthan
President
6307710201
siva@epir.com
Small Business Information at Submission:

EPIR TECHNOLOGIES, INC.
590 Territorial Drive, Suite B Bolingbrook, IL 60440

EIN/Tax ID: 364196918
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No