New high-performance PtSi IRCCD and its electrical shutter operation

Masahiro Shoda; Keiichi Akagawa; Atsushi Komai

doi:10.1117/12.279001

23 October 1997 New high-performance PtSi IRCCD and its electrical shutter operation

Masahiro Shoda, Keiichi Akagawa, Atsushi Komai

Proceedings Volume 3122, Infrared Spaceborne Remote Sensing V; (1997) https://doi.org/10.1117/12.279001
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

In this work the design and performance of a 537 (H) x505 (V) -element PtSi Schottky-barrier diode (SBD) IRCCD are described. To downsize the JR camera, the pixel size of the IRCCD has been reduced to 15.2mx11.8jtm. The package size of the IRCCD is l4mmxl4mm. The reduction of the pixel size causes a decrease in thermal sensitivity. However, the noise equivalent temperature difference (NETD) of the IRCCD is less than 0.13°C, because the transfer conversion gain from the electrons to the voltage has been increased, by decreasing the capacitance of its FDA. Furthermore, the NETD can be decreased to 0.1 1°C by increasing the platinum deposition temperature to 340°C. The IRCCD has an electrical shutter function with which the exposure time can be varied from 1/500 second to 1/5000 second. In addition, the IRCCD has a mixed-signal-mode shutter function, which was developed to expand the dynamic range. The mixed-signal-mode shutter function is performed by mixing the signal electrons of two kinds of pixels, one shuttered and the other unshuttered. The IRCCD also has a temperature monitor diode on a chip to control the cooling system of the JR camera. However, inclusion of this diode causes an increase in the fixed pattern noise. To reduce this noise, the monitor diode is forward biased for only a moment for temperature measurement. Keywords: PtSi SBD IRCCD, downsizing, electrical shutter, temperature monitor diode

Citation Download Citation

Masahiro Shoda, Keiichi Akagawa, and Atsushi Komai "New high-performance PtSi IRCCD and its electrical shutter operation", Proc. SPIE 3122, Infrared Spaceborne Remote Sensing V, (23 October 1997); https://doi.org/10.1117/12.279001

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