22 July 1998 High-MTF hybrid ferroelectric IRFPA
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Proceedings Volume 3379, Infrared Detectors and Focal Plane Arrays V; (1998); doi: 10.1117/12.317605
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States
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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Scott B. Evans, Terrence Hayden, "High-MTF hybrid ferroelectric IRFPA", Proc. SPIE 3379, Infrared Detectors and Focal Plane Arrays V, (22 July 1998); doi: 10.1117/12.317605; https://doi.org/10.1117/12.317605
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KEYWORDS
Modulation transfer functions

Sensors

Thin film coatings

Thermography

Semiconducting wafers

Readout integrated circuits

Coating

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