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Similarities Between Proton and Neutron Induced Dark Current Distribution in CMOS Image Sensors

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8 Author(s)
Virmontois, C. ; Université de Toulouse, ISAE, Toulouse, France ; Goiffon, V. ; Magnan, P. ; Girard, S.
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Several CMOS image sensors were exposed to neutron or proton beams (displacement damage dose range from 4 TeV/g to 1825 TeV/g) and their radiation-induced dark current distributions are compared. It appears that for a given displacement damage dose, the hot pixel tail distributions are very similar, if normalized properly. This behavior is observed on all the tested CIS designs (4 designs, 2 technologies) and all the tested particles (protons from 50 MeV to 500 MeV and neutrons from 14 MeV to 22 MeV). Thanks to this result, all the dark current distribution presented in this paper can be fitted by a simple model with a unique set of two factors (not varying from one experimental condition to another). The proposed normalization method of the dark current histogram can be used to compare any dark current distribution to the distributions observed in this work. This paper suggests that this model could be applied to other devices and/or irradiation conditions.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:59 ,  Issue: 4 )

Date of Publication:

Aug. 2012

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