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Proceedings Paper

New generation of long linear-butted HgCdTe arrays for high-resolution infrared imaging
Author(s): Pierre Castelein; Philippe Rambaud; Jean-Paul Chamonal; Arnaud Laflaquiere; Andre Perez; Michel Ravetto; Gerard L. Destefanis; Marcel Caes
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Paper Abstract

This paper presents a new generation of long linear butted arrays developed at LETI / LIR and dedicated to high resolution IR imaging for space and airborne applications. These IR focal plane arrays are based on modular architecture composed of butted CdHgTe photovoltaic detection circuits and Si CMOS multiplexers. CdHgTe detectors are made with the new planar technology leading to very high performances with low dark current. Specific in house techniques of dicing and butting are used in order to perform linear detection arrays, free of defect. Detectors redundancy has also been implemented in order to compensate bad detectors (deselection) or to improve the sensor uniformity. A presentation of the main electro-optical performances obtained in the two spectral ranges - 3-5 and 8-10 micrometers - is given. Comparison with the previous prototype (first generation) developed at LIR will also be discussed in the paper. Details of involved technologies, FPA architecture, operability and performances (NETD, responsivity, dark current .) of butted sensors working in the 3-5 and 8-10 micrometers spectral ranges will be presented.

Paper Details

Date Published: 5 August 2002
PDF: 8 pages
Proc. SPIE 4721, Infrared Detectors and Focal Plane Arrays VII, (5 August 2002); doi: 10.1117/12.478854
Show Author Affiliations
Pierre Castelein, CEA-LETI (France)
Philippe Rambaud, CEA-LETI (France)
Jean-Paul Chamonal, CEA-LETI (France)
Arnaud Laflaquiere, CEA-LETI (France)
Andre Perez, CEA-LETI (France)
Michel Ravetto, CEA-LETI (France)
Gerard L. Destefanis, CEA-LETI (France)
Marcel Caes, ONERA (France)

Published in SPIE Proceedings Vol. 4721:
Infrared Detectors and Focal Plane Arrays VII
Eustace L. Dereniak; Robert E. Sampson, Editor(s)

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