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Proceedings Paper

Development activities on NIR large format MCT detectors for astrophysics and space science at CEA and SOFRADIR
Author(s): Olivier Boulade; Vincent Moreau; Patrick Mulet; Olivier Gravrand; Cyril Cervera; Jean-Paul Zanatta; Pierre Castelein; Fabrice Guellec; Bruno Fièque; Philippe Chorier; Julien Roumegoux
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Paper Abstract

CEA and SOFRADIR have been manufacturing and characterizing near infrared detectors in the frame of ESA's near infrared large format sensor array roadmap to develop a 2Kx2K large format low flux low noise device for space applications such as astrophysics. These detectors use HgCdTe as the absorbing material and p/n diode technology. The technological developments (photovoltaic technology, readout circuit, ...) are shared between CEA/LETI and SOFRADIR, both in Grenoble, while most of the performances are evaluated at CEA/IRFU in Saclay where a dedicated test facility has been developed, in particular to measure very low dark currents. The paper will present the current status of these developments at the end of ESA's NIRLFSA phase 2. The performances of the latest batch of devices meet or are very close to all the requirements (quantum efficiency, dark current, cross talk, readout noise, ...) even though a glow induced by the ROIC prevents the accurate measurement of the dark current. The current devices are fairly small, 640x512 15μm pixels, and the next phase of activity will target the development of a full size 2Kx2K detector. From the design and development, to the manufacturing and finally the testing, that type of detector requests a high level of mastering. An appropriate manufacturing and process chain compatible with such a size is needed at industrial level and results obtained with CEA technology coupled with Sofradir industrial experience and work on large dimension detector allow French actors to be confident to address this type of future missions.

Paper Details

Date Published: 29 July 2016
PDF: 17 pages
Proc. SPIE 9915, High Energy, Optical, and Infrared Detectors for Astronomy VII, 99150C (29 July 2016); doi: 10.1117/12.2231295
Show Author Affiliations
Olivier Boulade, Commissariat à l'Énergie Atomique (France)
Vincent Moreau, Commissariat à l'Énergie Atomique (France)
Patrick Mulet, Commissariat à l'Énergie Atomique (France)
Olivier Gravrand, Univ. Grenoble Alpes and CEA, LETI, MINATEC Campus (France)
Cyril Cervera, Univ. Grenoble Alpes and CEA, LETI, MINATEC Campus (France)
Jean-Paul Zanatta, Univ. Grenoble Alpes and CEA, LETI, MINATEC Campus (France)
Pierre Castelein, Univ. Grenoble Alpes and CEA, LETI, MINATEC Campus (France)
Fabrice Guellec, Univ. Grenoble Alpes and CEA, LETI, MINATEC Campus (France)
Bruno Fièque, SOFRADIR (France)
Philippe Chorier, SOFRADIR (France)
Julien Roumegoux, SOFRADIR (France)


Published in SPIE Proceedings Vol. 9915:
High Energy, Optical, and Infrared Detectors for Astronomy VII
Andrew D. Holland; James Beletic, Editor(s)

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