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Proceedings Paper

CMOS/HgCdTe 2D array technology for staring systems
Author(s): Ian M. Baker; Graham J. Crimes; Roger A. Lockett; Maria Elena Marini; Salvatore Alfuso
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Paper Abstract

This paper describes the technology used for large, medium wavelength infrared arrays based on HgCdTe/CMOS hybrids. Such arrays are being produced for lightweight imagers and for space applications at wavelengths from 2.5 to 7.0 micrometers. The paper concentrates on a detector for the EUCLID CEPA 8 program. This is a 384 by 288 staring HgCdTe infrared array designed for the 3 - 5 micrometer band. The use of HgCdTe enables operation at temperatures up to 140 K and provides sensitivities (NETDs) around 17 to 20 mK. The array has a 20 micrometer pixel to minimize the size and cost of the focal plane subcomponents. The silicon architecture uses alternate stare and scan, or so-called blinking mode, so that the array can be used with microscan. The aim is to produce full PAL-TV resolution (768 by 576) when the four frames are combined. The benefits to the overall system of a small image diagonal (9.6 mm), a relatively high operating temperature (for low cooler power) and the low power consumption of CMOS technology are assessed during the program. The EUCLID dewar designed by Alenia is a purpose built encapsulation that offers some unique features over existing products. It has small physical size, low weight and low intrinsic heat load (50 mW). The dewar is designed for low cost and is fully integrated with the engine. The benefits in future of newer heterojunction detector technology to increase the operating temperature and further reduce cooler power and cool-down time are described.

Paper Details

Date Published: 27 June 1996
PDF: 10 pages
Proc. SPIE 2744, Infrared Technology and Applications XXII, (27 June 1996); doi: 10.1117/12.243486
Show Author Affiliations
Ian M. Baker, GEC-Marconi Infrared Ltd. (United Kingdom)
Graham J. Crimes, GEC-Marconi Infrared Ltd. (United Kingdom)
Roger A. Lockett, GEC-Marconi Infrared Ltd. (United Kingdom)
Maria Elena Marini, Alenia (Italy)
Salvatore Alfuso, Alenia (Italy)


Published in SPIE Proceedings Vol. 2744:
Infrared Technology and Applications XXII
Bjorn F. Andresen; Marija S. Scholl, Editor(s)

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