Long-wavelength infrared technology for astronomy at the Hughes Technology Center

Astronomy and Astrophysics – Astronomy

Scientific paper

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Arrays, Focal Plane Devices, Infrared Detectors, Readout, Cmos, Cryogenic Equipment, Infrared Astronomy, Infrared Telescopes, Quantum Efficiency

Scientific paper

The Hughes Technology Center (HTC) has developed a family of high-performance Si:As impurity-band conduction (IBC) hybrid focal plane arrays (FPAs) optimized for low background applications: 58 x 62 pixels (76 micrometer pitch), 128 x 128 pixels (75- and 120-micrometer pitch), and 256 x 256 pixels (30-micrometer pitch). These FPAs exhibit state-of-the-art low noise (less than 100 e(-)) achieved by using readout arrays fabricated on HTC's Cryo-Complementary Metal Oxide Semiconductor (CryoCMOS) process line. The IBC detector arrays, also fabricated at HTC, exhibit high quantum efficiency over a wide waveband with operating temperature of 4-12 K. In addition, Hughes is developing a 256 x 256 Si:As IBC FPA for high background applications as well as a 512 x 512 FPA. Readout development includes design and fabrication of 256 x 256 readouts with large well size of 1 x 107e(-) for the high-background FPA and 512 x 512 readouts with moderate well size (1 x 106e(-)).

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