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Accession Number N20130013408
Title Development of a 2K x 2K GaAs QWIP Focal Plane Array.
Publication Date Apr 2013
Media Count 4p
Personal Author A. Ewin A. La A. Wacynski C. Jhabvala D. Kelly J. Sun K. Choi L. Hess M. Jhabvala N. Costen Q. Ni R. Foltz S. Snodgrass T. Adachi
Abstract We are developing the next generation of GaAs Quantum Well Infrared Photodetector (QWIP) focal plane arrays (FPAs) in preparation for future NASA space-borne Earth observing missions. It is anticipated that these missions will require both wider ground spatial coverage as well as higher ground imaging resolution. In order to demonstrate our capability in meeting these future goals we have taken a two-tiered approach in the next stage of advanced QWIP focal plane array development. We will describe our progress in the development of a 512 x 3,200 (512 x 3K) array format for this next generation thermal imaging array for the NASA Landsat project. However, there currently is no existing readout integrated circuit (ROIC) for this format array.so to demonstrate the ability to scale-up an existing ROIC we developed a 1,920 x 2,048 (2K x 2K) array and it hybridized to a Raytheon SB419 CTIA readout integrated circuit that was scaled up from their existing 512 x 640 SB339 ROIC. Two versions of the 512 x 3K QWIP array were fabricated to accommodate a future design scale-up of both the Indigo 9803 ROIC based on a 25 micron pixel dimension and a scale up of the Indigo 9705 ROIC based on a 30 micron pixel dimension. Neither readout for the 512 x 3K has yet to be developed but we have fabricated both versions of the array. We describe the design, development and test results of this effort as well as the specific applications these FPAs are intended to address.
Keywords Earth observations(From space)
Fabrication
Focal plane devices
Gallium arsenides
Imaging techniques
Integrated circuits
Nasa programs
Pixels
Quantum well infrared photodetector
Readout
Thermal mapping

 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 82B - Photographic Techniques & Equipment
Corporate Author Goddard Space Flight Center, Greenbelt, MD.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1323
Contract Number N/A

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