The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2010
Filed:
Aug. 14, 2008
Darrel W. Endres, West Chester, OH (US);
Richard Rawe, Melbourne, KY (US);
Charles Martin, West Chester, OH (US);
Darrel W. Endres, West Chester, OH (US);
Richard Rawe, Melbourne, KY (US);
Charles Martin, West Chester, OH (US);
L-3 Communications Cincinnati Electronics Corporation, Mason, OH (US);
Abstract
According to one embodiment, an infrared focal plane comprises an array of pixels configured to detect optical radiation in a predetermined radiation band are positioned on a support substrate. The pixels are connected to pixel contacts on a read-out integrated circuit via pixel interconnects comprising bonding bumps. According to some embodiments, indium migration is blocked by a patterned electrical insulator comprising a plurality of intersecting walls defining a plurality of cells that surround each pixel interconnect. The patterned electrical insulator may be dimensioned such that it does not physically contact the support substrate, the array of pixels or pixel interconnects. In this manner, pixel-pair defects due to indium migration resulting from cryogenic thermal-cycling may be prevented, thereby extending the thermal-cycling lifetime of the focal plane array.