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20 October 1993 256 x 256 pixel InSb FPA for SIRTF and other astronomical applications
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As part of the NASA Space Infrared Telescope Facility (SIRTF), a low noise multiplexer has been developed. The hybridization of this multiplexer to a high quality indium antimonide (InSb) photodiode array has resulted in a MWIR detector of outstanding performance. The multiplexer is made of a 256 X 256 array of source follower amplifiers on a 30 micron square pitch. Random access binary decoders are used to access each pixel of the array, allowing any read-out scheme to be implemented. Dark current has been measured at temperatures ranging from 4 K to 77 K. Generation recombination currents dominate above 45 K. With 100 mV of reverse bias applied, less than 3 X 10-17 A is typical below 50 K with 8 X 10-19 A (5 electrons/second) at 4 K. Under the same conditions 0.25 pA was measured at 77 K. Read noise has been measured as low as 186 electrons using non-correlated techniques. Detector quantum efficiency is 50 to 80 percent through the entire wavelength band of 1 to 5 micrometers .
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey D. Biggs, Michael A. Blessinger, and Marie L. Louderback "256 x 256 pixel InSb FPA for SIRTF and other astronomical applications", Proc. SPIE 1946, Infrared Detectors and Instrumentation, (20 October 1993);


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