Passivation Technologies for Improved Operability in HgCdTe Focal Plane Arrays

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0147-08-C-7904
Agency Tracking Number: B063-025-0440
Amount: $998,574.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2006
Solicitation Topic Code: MDA06-025
Solicitation Number: 2006.3
Small Business Information
Southern Oklahoma Technology Center, 2610 Sam Noble Parkway, Ardmore, OK, 73401
DUNS: 159048698
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: Y
Principal Investigator
 Wayne Holland
 Senior Research Scientist
 (405) 227-9414
Business Contact
 Sallie Reddy
Title: President and CEO
Phone: (405) 227-9414
Research Institution
High-performance infrared detectors are mission-critical components of each layer of the Ballistic Missile Defense System. MDA is investing heavily in technologies that enhance producibility/operability of LWIR/VLWIR infrared focal plane arrays (FPAs), and reduce BMDS life cycle costs. HgCdTe is clearly the material of choice for these IRFPAs, but presents numerous challenges, including trap-assisted tunneling which results in excessive dark currents. Such defects in HgCdTe FPAs must be addressed for Next Generation detectors to deliver on their promise of better discrimination of low temperature targets against low temperature backgrounds, and large-format arrays. In Phase I, hydrogenation proved effective in passivating defects in MBE-grown HgCdTe/ZnCdTe diodes. Amethyst will team with BAE in Phase II to develop hydrogen passivation technology to improve operability and yields of LWIR/VLWIR FPAs manufactured in LPE-grown HgCdTe/ZnCdTe. The program involves development of tailored hydrogenation and integration schemes targeting passivation of the defects, i.e. traps, responsible for the tunneling current. Amethyst’s research plan also includes parametric studies to optimize passivation techniques for BAE’s process flow. Hydrogenated/non-hydrogenated (striped) hybridized arrays will be characterized to quantify operability gains. Hydrogenation is readily implemented as a straightforward add-on process with little or no impact on the conventional manufacturing flow.

* Information listed above is at the time of submission. *

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