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Automated Hybridization of X-ray Absorber Elements-A Path to Large Format Microcalorimeter ArraysIn the design of microcalorimeters, it is often desirable to produce the X-ray absorber separately from the detector element. In this case, the attachment of the absorber to the detector element with the required thermal and mechanical characteristics is a major challenge. In such arrays, the attachment has been done by hand. This process is not easily extended to the large format arrays required for future X- ray astronomy missions such as the New x-ray Telescope or NeXT. In this paper we present an automated process for attaching absorber tiles to the surface of a large-scale X-ray detector array. The absorbers are attached with stycast epoxy to a thermally isolating polymer structure made of SU-8. SU-8 is a negative epoxy based photo resist produced by Microchem. We describe the fabrication of the X-ray absorbers and their suspension on a handle die in an adhesive matrix. We describe the production process for the polymer isolators on the detector elements. We have developed a new process for the alignment, and simultaneous bonding of the absorber tiles to an entire detector array. This process uses equipment and techniques used in the flip-chip bonding industry and approaches developed in the fabrication of the XRS-2 instrument. XRS-2 was an X-ray spectrometer that was launched on the Suzaku telescope in July 10, 2005. We describe the process and show examples of sample arrays produced by this process. Arrays with up to 300 elements have been bonded. The present tests have used dummy absorbers made of Si. In future work, we will demonstrate bonding of HgTe absorbers.
Document ID
20070036574
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Moseley, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kelley, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Allen, C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kilbourne, C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Costen, N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Miller, T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2007
Subject Category
Electronics And Electrical Engineering
Meeting Information
Meeting: 12th International Workshop on Low Temperature Detectors
Location: Paris
Country: France
Start Date: July 22, 2007
End Date: July 27, 2007
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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