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Proceedings Paper

CCD/CMOS hybrid FPA for low light level imaging
Author(s): Xinqiao Liu; Boyd A. Fowler; Steve K. Onishi; Paul Vu; David D. Wen; Hung Do; Stuart Horn
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Paper Abstract

We present a CCD / CMOS hybrid focal plane array (FPA) for low light level imaging applications. The hybrid approach combines the best of CCD imaging characteristics (e.g. high quantum efficiency, low dark current, excellent uniformity, and low pixel cross talk) with the high speed, low power and ultra-low read noise of CMOS readout technology. The FPA is comprised of two CMOS readout integrated circuits (ROIC) that are bump bonded to a CCD imaging substrate. Each ROIC is an array of Capacitive Transimpedence Amplifiers (CTIA) that connect to the CCD columns via indium bumps. The proposed column parallel readout architecture eliminates the slow speed, high noise, and high power limitations of a conventional CCD. This results in a compact, low power, ultra-sensitive solid-state FPA that can be used in low light level applications such as live-cell microscopy and security cameras at room temperature operation. The prototype FPA has a 1280×1024 format with 12-um square pixels. Measured dark current is less than 5.8 pA/cm2 at room temperature and the overall read noise is as low as 2.9e at 30 frames/sec.

Paper Details

Date Published: 7 September 2005
PDF: 9 pages
Proc. SPIE 5881, Infrared and Photoelectronic Imagers and Detector Devices, 58810C (7 September 2005); doi: 10.1117/12.629497
Show Author Affiliations
Xinqiao Liu, Fairchild Imaging, Inc. (United States)
Boyd A. Fowler, Fairchild Imaging, Inc. (United States)
Steve K. Onishi, Fairchild Imaging, Inc. (United States)
Paul Vu, Fairchild Imaging, Inc. (United States)
David D. Wen, Fairchild Imaging, Inc. (United States)
Hung Do, Fairchild Imaging, Inc. (United States)
Stuart Horn, Army Night Vision and Electronic Sensors Directorate (United States)

Published in SPIE Proceedings Vol. 5881:
Infrared and Photoelectronic Imagers and Detector Devices
Randolph E. Longshore, Editor(s)

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