A 256 by 256 HgCdTe hybrid focal plane for low-background earth resources and astronomy applications

Astronomy and Astrophysics – Astronomy

Scientific paper

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Earth Resources, Field Effect Transistors, Focal Plane Devices, Infrared Detectors, Mercury Cadmium Tellurides, Indium Antimonides, Infrared Astronomy, Photovoltaic Effect, Pixels

Scientific paper

This paper describes a 256 x 256 HgCdTe hybrid focal plane with a 0.9- to 2.6-micron spectral range. The silicon FET switch multiplexer (mux) is based on previous hybrid work with a 128 x 128 Reticon mux. The high-density device described has a 40-micron pixel pitch vs 60-micron pixel pitch for the 128 x 128 devices. A read noise of about 1,000 e(-) has been obtained on developmental hybrid structures, along with full well capacities of about 1 x 10 to the 6th e(-). Preliminary device characterization for the 256 x 256 device, along with the first low-background astronomy test results for the 128 x 128 devices, will be presented.

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