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Proceedings Paper

Improved cell design for Schottky barrier infrared detector arrays
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Paper Abstract

The responsivity of large scale platinum silicide arrays, having small pixels, is low compared to the responsivity of large area test diodes fabricated on the same wafer. Often, the responsivity loss is described by assigning a lower Fowler emission coefficient to the detectors. We find the reduced responsivity to be the direct result of a reduction in the effective active area of the detector. This reduction in effective active area becomes more pronounced as the detector cell size is reduced. We provide a simple model for the area reduction in terms of modulation of detector Schottky potential by the underlying depletion region of the detector guard ring. We also suggest changes in the detector array unit cell design, which will maximize responsivity.

Paper Details

Date Published: 8 September 1995
PDF: 8 pages
Proc. SPIE 2552, Infrared Technology XXI, (8 September 1995); doi: 10.1117/12.218235
Show Author Affiliations
Freeman D. Shepherd, Rome Lab. (United States)
Jonathan Martin Mooney, Rome Lab. (United States)
Alexis P. Tzannes, Rome Lab. (United States)
James E. Murguia, Solid State Scientific Technology Corp. (United States)

Published in SPIE Proceedings Vol. 2552:
Infrared Technology XXI
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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