对某国产0.5μm CMOS(Complementary Metal Oxide Semiconductor,互补金属氧化物半导体)N阱工艺CMOS有源像素传感器的电离总剂量效应进行了研究,通过60Co-γ射线辐照试验,着重分析了对辐射最敏感的暗信号和暗信号非均匀性随总剂量退化...对某国产0.5μm CMOS(Complementary Metal Oxide Semiconductor,互补金属氧化物半导体)N阱工艺CMOS有源像素传感器的电离总剂量效应进行了研究,通过60Co-γ射线辐照试验,着重分析了对辐射最敏感的暗信号和暗信号非均匀性随总剂量退化的物理机理.实验发现,随着辐照剂量的增加,暗信号和暗信号非均匀性显著退化,并且静态偏置条件下器件的辐射损伤最大.暗信号退化的主要原因是光电二极管pn结和复位晶体管源端N+/Psub结表面边界周围的SiO2产生了大量的界面态;暗信号非均匀性显著退化是由于光电二极管的暗信号增大引起.上述工作可为深入研究CMOS有源像素传感器的抗辐射加固及其辐射损伤评估提供参考.展开更多
对某国产0.5μm工艺制造的互补金属氧化物半导体有源像素传感器进行了10 Me V质子辐射试验,当辐射注量达到预定注量点时,采用离线的测试方法,定量测试了器件暗信号的变化情况.试验结果表明,随着辐射注量的增加暗信号迅速增大.采用MULASS...对某国产0.5μm工艺制造的互补金属氧化物半导体有源像素传感器进行了10 Me V质子辐射试验,当辐射注量达到预定注量点时,采用离线的测试方法,定量测试了器件暗信号的变化情况.试验结果表明,随着辐射注量的增加暗信号迅速增大.采用MULASSIS(multi-layered shielding simulation software)软件计算了电离损伤剂量和位移损伤剂量,在与γ辐射试验数据对比的基础上,结合器件结构和工艺参数,建立了分离质子辐射引起的电离效应和位移效应理论模型,深入分析了器件暗信号的退化机理.研究结果表明,对该国产器件而言,电离效应导致的表面暗信号和位移效应导致的体暗信号对整个器件暗信号退化的贡献大致相当.展开更多
A novel transmitter to generate a dark RZ signal with tunable duty cycle and extinction ratio is proposed, by modifying the process of precoding, modulating and coding. A dark RZ signal is generated simply by using on...A novel transmitter to generate a dark RZ signal with tunable duty cycle and extinction ratio is proposed, by modifying the process of precoding, modulating and coding. A dark RZ signal is generated simply by using one dual-arm Mach-Zehnder LiNbO3 modulator. We demonstrate experimentally that this optical dark RZ signal can be directly measured by a conven- tional binary intensity modulation direct detection (IM-DD) receiver. When different values of duty cycles at 2.5 Gbit/s are adjusted, the experimental results show different BER curves and eye diagrams of the optical dark RZ signal.展开更多
文摘对某国产0.5μm CMOS(Complementary Metal Oxide Semiconductor,互补金属氧化物半导体)N阱工艺CMOS有源像素传感器的电离总剂量效应进行了研究,通过60Co-γ射线辐照试验,着重分析了对辐射最敏感的暗信号和暗信号非均匀性随总剂量退化的物理机理.实验发现,随着辐照剂量的增加,暗信号和暗信号非均匀性显著退化,并且静态偏置条件下器件的辐射损伤最大.暗信号退化的主要原因是光电二极管pn结和复位晶体管源端N+/Psub结表面边界周围的SiO2产生了大量的界面态;暗信号非均匀性显著退化是由于光电二极管的暗信号增大引起.上述工作可为深入研究CMOS有源像素传感器的抗辐射加固及其辐射损伤评估提供参考.
基金This work is supported by the National Natural Science Founda-tion of China (Grant No.10576012)the Specialized ResearchFund for the Doctoral Program of Higher Education of China(Grant No.20040532005)
文摘A novel transmitter to generate a dark RZ signal with tunable duty cycle and extinction ratio is proposed, by modifying the process of precoding, modulating and coding. A dark RZ signal is generated simply by using one dual-arm Mach-Zehnder LiNbO3 modulator. We demonstrate experimentally that this optical dark RZ signal can be directly measured by a conven- tional binary intensity modulation direct detection (IM-DD) receiver. When different values of duty cycles at 2.5 Gbit/s are adjusted, the experimental results show different BER curves and eye diagrams of the optical dark RZ signal.