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Optical Engineering

Schottky-Barrier Infrared Focal Plane Array For Spectroscopic Applications
Author(s): Leland R. Hudson; Hsin-Fu Tseng; Weng-Lyang Wang; Gene P. Weckler
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Paper Abstract

The construction, operation, and performance of a linear in-frared focal plane array employing platinum silicide Schottky-barrier detectors is described. The 1 x256 element array is fabricated with standard integrated-circuit-grade silicon and NMOS processing. This device uses a digital scan readout scheme consisting of a digital shift register and associated MOSFET switches. The inherent advantage of the digital scan read-out is that large signal levels can be handled without saturation. As a result, the pixel size can be made quite large (i.e., high aspect ratios are possible), thus maximizing sensitivity. This is particularly important in spectroscopy applications. In addition, the digital scan readout structure is less susceptible to freeze-out at temperatures below 40 K when compared with other types of readout structures. The array is operated with two-phase clocking, which is relatively simple and not critical to the performance of the device. The device exhibits a very high reverse breakdown voltage Vrb of 30 V, a quantum efficiency coefficient C1 of 42%/eV, and a long-wavelength cutoff Xc of 5.4µm.

Paper Details

Date Published: 1 March 1987
PDF: 7 pages
Opt. Eng. 26(3) 263216 doi: 10.1117/12.7974053
Published in: Optical Engineering Volume 26, Issue 3
Show Author Affiliations
Leland R. Hudson, EG&G Reticon (United States)
Hsin-Fu Tseng, EG&G Reticon (United States)
Weng-Lyang Wang, EG&G Reticon (United States)
Gene P. Weckler, EG&G Reticon (United States)

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