Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985honi.rept.....s&link_type=abstract
Quarterly Report Honeywell, Inc., Lexington, MA.
Astronomy and Astrophysics
Astronomy
Arrays, Carrier Density (Solid State), Infrared Detectors, Low Temperature Tests, Mercury Cadmium Tellurides, Mosaics, Charge Carriers, Electron Tunneling, Semiconductors (Materials), Short Wave Radiation, Spaceborne Astronomy
Scientific paper
Short wavelength (1 to 3 micron) HgCdTe mosaic detector arrays for space astronomy purposes were fabricated and studied. Honeywell will test and analyze these arrays at moderate temperatures (300-130K). Low temperature testing will be performed at the University of Hawaii. Short wavelength mosaic arrays were fabricated on three wafers and one array from each wafer was tested and analyzed. The p-type base carrier concentration on these wafers was an order of magnitude lower than typically used so far on this program (10 to the 14/cc as compared to 10 to the 15/cc). Tunneling currents are expected to decrease with this decrease in carrier concentration, resulting in improved performance at very low temperatures. The risk with such a low carrier concentration is that fixed charge in the surface passivating layer must be carefully controlled to prevent surface inversion layers.
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