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Proceedings Paper

GaAs arrays for x-ray spectroscopy
Author(s): Alan Owens; Hans Andersson; M. Campbell; David H. Lumb; Seppo Arvo Anter Nenonen; Lukas Tlustos
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Paper Abstract

We present results from our compound semiconductor laboratory program and describe the development of a large area GaAs imaging array for planetary remote sensing applications. The device is fabricated from ~150 micron thick epitaxial material, patterned into a 64 x 64 pixel array, back-thinned and contacted. It will be flip-chip bump bonded onto a custom designed, fully spectroscopic, low noise (< 20 e- rms) active pixel sensor ASIC. At present, the ASIC is still under development and so in order to validate and qualify the various technological steps, we have produced a GaAs imager based on the MEDIPIX-1 format using a MEDIPIX-1 readout chip. In X-ray tests, the device was found to work well with a bump yield of 99.9%. After flat field corrections, the spatial uniformity of the array was commensurate with Poisson noise.

Paper Details

Date Published: 29 September 2004
PDF: 8 pages
Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.552930
Show Author Affiliations
Alan Owens, European Space Agency/ESTEC (Netherlands)
Hans Andersson, Metorex International Oy (Finland)
M. Campbell, CERN Geneva (Switzerland)
David H. Lumb, European Space Agency/ESTEC (Netherlands)
Seppo Arvo Anter Nenonen, Metorex International Oy (Finland)
Lukas Tlustos, CERN Geneva (Switzerland)

Published in SPIE Proceedings Vol. 5501:
High-Energy Detectors in Astronomy
Andrew D. Holland, Editor(s)

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