Paper
1 September 1992 128 x 128 PACE-I HgCdTe hybrid FPAs for thermoelectrically cooled applications
Lester J. Kozlowski, S. L. Johnston, William V. McLevige, A. H.B. Vanderwyck, Donald E. Cooper, Scott A. Cabelli, Edward R. Blazejewski, Kadri Vural, William E. Tennant
Author Affiliations +
Abstract
Staring 128 X 128 hybrid HgCdTe FPAs have been demonstrated with very good sensitivity and operability at temperatures compatible with thermoelectric cooling (> 160 K). The FPAs consist of HgCdTe/sapphire (PACE-I; producible alternative to CdTe for epitaxy) detector arrays hybridized to a CMOS readout having a gate modulation input circuit. FPAs with SWIR (2.5 micrometers at 78 K) and MWIR (4.56 micrometers at 180 K) cutoff wavelengths ((lambda) co) were made and evaluated. The SWIR arrays were ZnS passivated; the MWIR arrays were CdTe-passivated. Though the (lambda) co of the MWIR devices was not specifically optimized for terrestrial imaging at TE-cooled temperatures in the preferred 3.4 to 4.1 micrometers band, very good sensitivity was achieved, particularly relative to other technologies at temperatures >= 120 K. Mean laboratory noise equivalent temperature differences (NE(Delta) T) at 120 K, 170 K, and 180 K were 0.0048 K, 0.053 K, and 0.061 K respectively, for the MWIR device. While the NE(Delta) T was measured without a spectral filter, the sensitivity for 3.4 to 4.1 micrometers bandpass extrapolates to camera NE(Delta) T <EQ 0.05 K, if f/1.5 or faster optics are used. Near BLIP Detectivity (D*) of 1.62 X 1013 cm-Hz1/2/W and mean NE(Delta) T of 0.04 K were measured on the SWIR hybrid at 22.5 msec integration time and operating temperatures <EQ 162 K. Imagery of corresponding quality was subsequently generated. Since the CMOS multiplexer dissipates little power and needs a minimum of support circuitry, a viable thermoelectrically cooled FPA technology is implied.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lester J. Kozlowski, S. L. Johnston, William V. McLevige, A. H.B. Vanderwyck, Donald E. Cooper, Scott A. Cabelli, Edward R. Blazejewski, Kadri Vural, and William E. Tennant "128 x 128 PACE-I HgCdTe hybrid FPAs for thermoelectrically cooled applications", Proc. SPIE 1685, Infrared Detectors and Focal Plane Arrays II, (1 September 1992); https://doi.org/10.1117/12.137796
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Cited by 10 scholarly publications.
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KEYWORDS
Staring arrays

Sensors

Mid-IR

Mercury cadmium telluride

Short wave infrared radiation

Detector arrays

Field effect transistors

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