电荷耦合器件中子辐照诱发的位移效应

汪波; 李豫东; 郭旗; 汪朝敏; 文林

doi:10.3788/fgxb20163701.0044

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电荷耦合器件中子辐照诱发的位移效应

器件制备及器件物理 | 更新时间：2020-08-12

- 电荷耦合器件中子辐照诱发的位移效应
- Neutron Irradiation Induced Displacement Damage Effects on Charge Coupled Device
- 发光学报 2016年37卷第1期页码：44-49
- 作者机构：
  
  1. 中国科学院大学北京,100049
  2. 重庆光电技术研究所重庆,400060
  3. 中国科学院特殊环境功能材料与器件重点实验室, 新疆电子信息材料与器件重点实验室, 中国科学院新疆理化技术研究所,新疆乌鲁木齐,830011
- 作者简介：
- 基金信息：
  
  国家自然科学基金(11005152)资助项目()
- DOI：10.3788/fgxb20163701.0044
  中图分类号： TN386.5
- 纸质出版日期：2016-1-10，
  
  收稿日期：2015-9-25，
  
  修回日期：2015-11-18，
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汪波, 李豫东, 郭旗等. 电荷耦合器件中子辐照诱发的位移效应[J]. 发光学报, 2016,37(1): 44-49

WANG Bo, LI Yu-dong, GUO Qi etc. Neutron Irradiation Induced Displacement Damage Effects on Charge Coupled Device[J]. Chinese Journal of Luminescence, 2016,37(1): 44-49
汪波, 李豫东, 郭旗等. 电荷耦合器件中子辐照诱发的位移效应[J]. 发光学报, 2016,37(1): 44-49 DOI： 10.3788/fgxb20163701.0044.

WANG Bo, LI Yu-dong, GUO Qi etc. Neutron Irradiation Induced Displacement Damage Effects on Charge Coupled Device[J]. Chinese Journal of Luminescence, 2016,37(1): 44-49 DOI： 10.3788/fgxb20163701.0044.

摘要

为研究电荷耦合器件空间辐照效应、参数退化机理

对国产6464像元电荷耦合器件进行了中子辐照位移损伤效应研究。样品在中子辐照下

暗信号、暗信号非均匀性和电荷转移效率等关键性能参数退化显著。研究结果表明:暗信号的退化是由于中子辐照产生的体缺陷能级在耗尽层中充当复合-产生中心

增大了热载流子的产生率所致

而各像素单元暗信号退化的不一致性使暗信号非均匀性增大;电荷转移效率显著减小则是由于中子辐照在转移沟道中产生的体缺陷不断捕获、发射电子所引起。在整个实验过程中

饱和输出电压的退化可以忽略不计

表现出较好的抗位移损伤能力。

Abstract

Displacement damage effects due to neutron irradiations of charge coupled devices were presented through the analysis of the dark signals behavior in pixel arrays. When the fluence of neutron reached the predetermined point

the change of dark signal

dark signal non-uniformity

charge transfer efficiency and saturated output signal was measured off line. The major effect of neutron induced displacement damage on charge coupled device is the increase in dark signals as a result of carrier generation in the bulk depletion region of the pixel. Although the increase in the mean dark signals with neutron irradiation is important

the dark signals non-uniformity is generally the biggest concern for charge coupled device applications in space. Very large dark signals pixels can be produced when a collision occurs in a high electric field region of a pixel as a result of electric field enhanced emission. Another important performance parameter for a charge coupled device is the charge transfer efficiency

which is the fraction of signal charge transferred from pixel to pixel during read out. If a signal charge is trapped by neutron induced defect

and remains trapped for more than one clock cycle

it will be lost from the signal charge packet. Saturation output signal voltage does not have any obvious degradation even at the highest DDD level. The research will help the designers to know the radiation damage in charge coupled device and improve the tolerance by radiation hardening design.

关键词

电荷耦合器件中子辐照位移效应电荷转移效率暗信号

Keywords

charge coupled devicesneutron irradiationdisplacement damage effectcharge transfer efficiencydark signal

references

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