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Proceedings Paper

CMOS buried multi-junction (BMJ) detector for bio-chemical analysis
Author(s): Guo-Neng Lu; Thierry Courcier; Bastien Mamdy; Sylvain Feruglio; Paul G. Charette; Vincent Aimez; Olivier Romain; Patrick Pittet
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Paper Abstract

The CMOS buried multi-junction (BMJ) detector with multiple outputs has distinct spectral responses that may be exploited for applications such as bio-chemical analysis. We tackle here dark current issue by identifying different components inside the detector structure. The identification methods are based on the observation of bias and temperature dependence, as well as measurements of test detector chip integrating different design variations. Surface thermal generation may become predominant when the detector size shrinks, thus causing dark current degradation. To prevent this effect, we propose a low-sized detector structure with passivation of all its surrounding Si/SiO2 interface areas.

Also for the detector readout, we present a multi-channel charge-amplifier architecture with noise analysis. Effects of noise coming from amplifiers and related to the coupled detector’s dynamic conductances are illuminated. To pick up weak signals, synchronous detection can be implemented. A BDJ (Buried Double Junction) detector chip designed with a switched-phase architectural approach gives a minimum detectable signal of 15μlx@555nm or 1μlx@555nm at 27°C or – 10°C, for an integration time of 3s or 45s respectively.

Paper Details

Date Published: 15 October 2015
PDF: 6 pages
Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 967412 (15 October 2015); doi: 10.1117/12.2199232
Show Author Affiliations
Guo-Neng Lu, Nanotechnologies Institute of Lyon, CNRS, Claude Bernard Univ. Lyon 1 (France)
Thierry Courcier, Univ. de Sherbrooke (Canada)
Bastien Mamdy, Nanotechnologies Institute of Lyon, CNRS, Claude Bernard Univ. Lyon 1 (France)
Sylvain Feruglio, UPMC, Univ. Paris 6, CNRS (France)
Paul G. Charette, Univ. de Sherbrooke (Canada)
Vincent Aimez, Univ. de Sherbrooke (Canada)
Olivier Romain, Univ. Cergy Pontoise, ENSEA, CRNS (France)
Patrick Pittet, Nanotechnologies Institute of Lyon, CNRS, Claude Bernard Univ. Lyon 1 (France)


Published in SPIE Proceedings Vol. 9674:
AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Haimei Gong; Nanjian Wu; Yang Ni; Weibiao Chen; Jin Lu, Editor(s)

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