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Proceedings Paper

Modeling of BDJ and BTJ structures for color detection
Author(s): Mohamed Sedjil; Guo Neng Lu; Mohamed Ben Chouikha; Annick Alexandre
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Paper Abstract

Two color-sensitive detectors, based respectively on BDJ and BTJ structures, have recently been developed in standard VLSI processes. The BDJ structure implemented in a CMOS process can produce two photocurrents, and the photocurrent ratio is a monotone function of the wavelength. The BTJ structure realized in a BiCMOS process gives three band-pass spectral response, thus allowing trichromatic color detection. In order to obtain better insight into the behavior of these two structures, and to simulate their characteristics, we have established physical models for photocurrent calculations. The following approach has been adopted: i) calculating drift and diffusion photocurrent components which are produced in different depletion layers and neutral regions of silicon; ii) according to their contributions, determining photocurrents flowing through each buried junction. A computer program can be written for device simulations. The validity of these models has been verified through comparison between simulations and measurements. These models can also be used to study effects of parameters involved in the presented models.

Paper Details

Date Published: 10 March 1999
PDF: 10 pages
Proc. SPIE 3680, Design, Test, and Microfabrication of MEMS and MOEMS, (10 March 1999); doi: 10.1117/12.341225
Show Author Affiliations
Mohamed Sedjil, Univ. Paris et Marie Curie (France)
Guo Neng Lu, Univ. Paris et Marie Curie (France)
Mohamed Ben Chouikha, Univ. Paris et Marie Curie (France)
Annick Alexandre, Univ. Paris et Marie Curie (France)


Published in SPIE Proceedings Vol. 3680:
Design, Test, and Microfabrication of MEMS and MOEMS

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