基于Synopsys公司3D TCAD器件模拟,该文通过改变3种工艺参数,研究65 nm体硅CMOS工艺下PMOS晶体管工艺参数变化对静态随机存储器(Static Random Access Memory,SRAM)存储单元翻转恢复效应的影响。研究结果表明:降低PMOS晶体管的P+深阱掺...基于Synopsys公司3D TCAD器件模拟,该文通过改变3种工艺参数,研究65 nm体硅CMOS工艺下PMOS晶体管工艺参数变化对静态随机存储器(Static Random Access Memory,SRAM)存储单元翻转恢复效应的影响。研究结果表明:降低PMOS晶体管的P+深阱掺杂浓度、N阱掺杂浓度或调阈掺杂浓度,有助于减小翻转恢复所需的线性能量传输值(Linear Energy Transfer,LET);通过降低PMOS晶体管的P+深阱掺杂浓度和N阱掺杂浓度,使翻转恢复时间变长。该文研究结论有助于优化SRAM存储单元抗单粒子效应(Single-Event Effect,SEE)设计,并且可以指导体硅CMOS工艺下抗辐射集成电路的研究。展开更多
We analyzed the temporal and spatial variation, and interannual variability of the North Pacific meridional overturning circulation using an empirical orthogonal function method, and calculated mass transport using Si...We analyzed the temporal and spatial variation, and interannual variability of the North Pacific meridional overturning circulation using an empirical orthogonal function method, and calculated mass transport using Simple Ocean Data Assimilation Data from 1958-2008. The meridional streamfunction field in the North Pacific tilts N-S; the Tropical Cell （TC）, Subtropical Cell （STC）, and Deep Tropical Cell （DTC） may be in phase on an annual time scale; the TC and the STC are out of phase on an interannual time scale, but the interannual variability of the DTC is complex. The TC and STC interannual variability is associated with ENSO （El Nifio-Southem Oscillation）. The TC northward, southward, upward, and downward transports all weaken in E1 Nifios and strengthen in La Nifias. The STC northward and southward transports are out of phase, while the STC northward and downward transports are in phase. Sea-surface water that reaches the middle latitude and is subducted may not completely return to the vopics. The zonal wind anomalies over the central North Pacific, which control Ekman transport, and the east-west slope of the sea level may be major factors causing the TC northward and southward transport interannual variability and the STC northward and southward transports on the interannual time scale. The DTC northward and southward transports decrease during strong E1 Nifios and increase during strong La Nifias. DTC upward and downward transports are not strongly correlated with the Nifio-3 index and may not be completely controlled by ENSO.展开更多
文摘基于Synopsys公司3D TCAD器件模拟,该文通过改变3种工艺参数,研究65 nm体硅CMOS工艺下PMOS晶体管工艺参数变化对静态随机存储器(Static Random Access Memory,SRAM)存储单元翻转恢复效应的影响。研究结果表明:降低PMOS晶体管的P+深阱掺杂浓度、N阱掺杂浓度或调阈掺杂浓度,有助于减小翻转恢复所需的线性能量传输值(Linear Energy Transfer,LET);通过降低PMOS晶体管的P+深阱掺杂浓度和N阱掺杂浓度,使翻转恢复时间变长。该文研究结论有助于优化SRAM存储单元抗单粒子效应(Single-Event Effect,SEE)设计,并且可以指导体硅CMOS工艺下抗辐射集成电路的研究。
基金Supported by the National Basic Research Program of China(973 Program)(Nos.2012CB417402,2007CB816002)
文摘We analyzed the temporal and spatial variation, and interannual variability of the North Pacific meridional overturning circulation using an empirical orthogonal function method, and calculated mass transport using Simple Ocean Data Assimilation Data from 1958-2008. The meridional streamfunction field in the North Pacific tilts N-S; the Tropical Cell （TC）, Subtropical Cell （STC）, and Deep Tropical Cell （DTC） may be in phase on an annual time scale; the TC and the STC are out of phase on an interannual time scale, but the interannual variability of the DTC is complex. The TC and STC interannual variability is associated with ENSO （El Nifio-Southem Oscillation）. The TC northward, southward, upward, and downward transports all weaken in E1 Nifios and strengthen in La Nifias. The STC northward and southward transports are out of phase, while the STC northward and downward transports are in phase. Sea-surface water that reaches the middle latitude and is subducted may not completely return to the vopics. The zonal wind anomalies over the central North Pacific, which control Ekman transport, and the east-west slope of the sea level may be major factors causing the TC northward and southward transport interannual variability and the STC northward and southward transports on the interannual time scale. The DTC northward and southward transports decrease during strong E1 Nifios and increase during strong La Nifias. DTC upward and downward transports are not strongly correlated with the Nifio-3 index and may not be completely controlled by ENSO.
