Passivation Technologies for Improved Operability and Radiation Tolerance in VLWIR HgCdTe Focal Plane Arrays

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-07-C-7705
Agency Tracking Number: B063-025-0440
Amount: $99,894.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
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
 Salle Reddy
Title: President & CEO
Phone: (405) 227-9414
Research Institution
HgCdTe, with its high quantum efficiency, remains the material of choice for most high-performance infrared detector applications. By varying its alloy composition, HgCdTe can be used for short wavelength to very long wavelength infrared (VLWIR); however, its use in VLWIR (12-16 microns) applications is problematic, even when grown on lattice-matched CdZnTe substrates, due to material and substrate quality issues. Ongoing work by Amethyst Research is proving hydrogenation effective in passivating defects and improving carrier lifetime/mobility in HgCdTe/Si infrared focal plane arrays (IRFPAs), offering the potential for increased producibility of large arrays, extended effective spectral response to longer wavelengths, and reduced cooling requirements. Recent research by Amethyst suggests that hydrogenation may also be effective in defect mitigation and the attendant operability improvements of HgCdTe/ZnCdTe focal plane arrays. There is also evidence to suggest that hydrogenation may improve radiation hardness of the HgCdTe/ZnCdTe, providing a self-healing material with immunity to a variety of defect sources. Amethyst proposes to investigate hydrogenation of HgCdTe/ZnCdTe for defect passivation and radiation hardening. Amethyst’s collaboration with BAE, Raytheon Vision Systems and Teledyne Imaging Sensors (formerly Rockwell Scientific), the country’s major IRFPA manufacturers, will ensure rapid transition of this manufacturing technology to MDA platforms.

* information listed above is at the time of submission.

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