MA Li-ya, LI Yu-dong, GUO Qi etc. Electron Beam Radiation Effects on CMOS Active Pixel Sensor[J]. Chinese Journal of Luminescence, 2017,38(2): 182-187 DOI: 10.3788/fgxb20173802.0182.
Electron Beam Radiation Effects on CMOS Active Pixel Sensor
Electron beam irradiation experiments were taken on the domestic CMOS image sensors
the irradiation effect and damage mechanism of the devices were analyzed. By using off-line measuring method before and after irradiation and in the process of annealing
the parameters such as dark signal
saturated voltage
spectral response characteristics were measured. The experiment results show that the non-uniformity of dark signal and dark current increase with the increase of irradiation dose and high temperature annealing time. The saturation voltages reduce significantly under the electron beam irradiation and recover in the process of high temperature annealing. There is no significant change for spectral response characteristics before and after the irradiation. The changes of the dark current
saturation voltage are due to the broadening of the photodiode depletion layer caused by irradiation-induced oxide trapped charge and the increase of recombination centers caused by irradiation-induced interface states.
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references
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