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Proceedings Paper

High-MTF hybrid ferroelectric IRFPA
Author(s): Scott B. Evans; Terrence Hayden
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Paper Abstract

Low cost, uncooled hybrid infrared focal plane arrays (IRFPA's) are in full-scale production at Raytheon Systems Company (RSC), formerly Texas Instruments Defense Systems and Electronics Group. Detectors consist of reticulated ceramic barium strontium titanate (BST) arrays of 320 X 240 pixels on 48.5 micrometer pitch. The principal performance shortcoming of the hybrid arrays has been low MTF due to thermal crosstalk between pixels. In the past two years, significant improvements have been made to increase MTF making hybrids more competitive in performance with monolithic arrays. The improvements are (1) the reduction of the thickness of the IR absorbing layer electrode that maintains electrical continuity and increases thermal isolation between pixels, (2) reduction of the electrical crosstalk from the ROIC, and (3) development of a process to increase the thermal path-length between pixels called 'elevated optical coat.' This paper describes all three activities and their efficacy. Also discussed is the uncooled IRFPA production capability at RSC.

Paper Details

Date Published: 22 July 1998
PDF: 11 pages
Proc. SPIE 3379, Infrared Detectors and Focal Plane Arrays V, (22 July 1998); doi: 10.1117/12.317605
Show Author Affiliations
Scott B. Evans, Raytheon Systems Co. (United States)
Terrence Hayden, Raytheon Systems Co. (United States)


Published in SPIE Proceedings Vol. 3379:
Infrared Detectors and Focal Plane Arrays V
Eustace L. Dereniak; Robert E. Sampson, Editor(s)

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