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Proceedings Paper

Far-infrared focal plane development for SIRTF
Author(s): Erick T. Young; Michael J. Scutero; George H. Rieke; Thomas E. Milner; Frank J. Low; William Hubbard; James T. Davis; Eugene E. Haller; Jeffrey W. Beeman
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Paper Abstract

We describe the development of sensitive extrinsic germanium focal plane arrays for the Space Infrared Telescope Facility (SIRTF). The cryogenic telescope of SIRTF will be used for natural-background-limited astronomical observations, an application that requires arrays of far-infrared sensors of unprecedented sensitivity. For the 30 -55 tm wavelength range, we describe the development of monolithic Ge:Be arrays with associated readouts bump-bonded to a common substrate. For the 55 - 120 im wavelength range, we describe arrays based on a 1 x32 building block that can be stacked into fully-filled two-dimensional arrays. We show results from tests of a 3 x 32 demonstration array that operates at the SIRTF performance levels. This array demonstrates solutions to the problems of 1) maintaining the required detector operating temperature ( < 2K ) ; 2) isolating the array from the heat and photon emission of the readout; 3) achieving long absorption paths in the detectors; and 4) maintaining constant detector bias and low noise from the readout amplifier. The array design permits stacking into the full 32x32 format required for SIRTF The array thermally isolates the readout from the detectors to take advantage of the improved electronics noise performance at the elevated temperature of 20 K. We also show designs for improved versions of the array that emphasize manufacturability and the ability to be space qualified

Paper Details

Date Published: 1 July 1992
PDF: 12 pages
Proc. SPIE 1684, Infrared Readout Electronics, (1 July 1992); doi: 10.1117/12.60496
Show Author Affiliations
Erick T. Young, Steward Observatory/Univ. of Arizona (United States)
Michael J. Scutero, Steward Observatory/Univ. of Arizona (United States)
George H. Rieke, Steward Observatory/Univ. of Arizona (United States)
Thomas E. Milner, Steward Observatory/Univ. of Arizona (United States)
Frank J. Low, Steward Observatory/Univ. of Arizona (United States)
William Hubbard, Steward Observatory/Univ. of Arizona (United States)
James T. Davis, Steward Observatory/Univ. of Arizona (United States)
Eugene E. Haller, Lawrence Berkeley Lab. (United States)
Jeffrey W. Beeman, Lawrence Berkeley Lab. (United States)

Published in SPIE Proceedings Vol. 1684:
Infrared Readout Electronics
Eric R. Fossum, Editor(s)

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