共查询到18条相似文献,搜索用时 78 毫秒
1.
对超深亚微米PMOS器件的负栅压温度不稳定性(NBTI)退化机理进行了研究.主要集中在对器件施加NBT和随后的PBT应力后器件阈值电压的漂移上.实验证明反型沟道中空穴在栅氧中的俘获以及氢分子在栅氧中的扩散是引起NBTI退化的主要原因.当应力条件变为PBT时,陷落的空穴可以快速退陷,但只有部分氢分子可以扩散回栅氧与衬底界面钝化硅悬挂键,这就导致了PBT条件下阈值电压只能部分恢复.
关键词:
超深亚微米PMOS器件
负偏压温度不稳定性
界面陷阱
氢气 相似文献
2.
分析了槽栅器件中的热载流子形成机理,发现在三个应力区中,中栅压附近热载流子产生概率达到最大.利用先进的半导体器件二维器件仿真器研究了槽栅和平面PMOSFET的热载流子特 性,结果表明槽栅器件中热载流子的产生远少于平面器件,且对于栅长在深亚微米和超深亚 微米情况下尤为突出.为进一步探讨热载流子加固后对器件特性的其他影响,分别对不同种 类和浓度的界面态引起的器件栅极和漏极特性的漂移进行了研究,结果表明同样种类和密度 的界面态在槽栅器件中引起的器件特性的漂移远大于平面器件.为开展深亚微米和亚0.1微米 新型槽栅
关键词:
槽栅PMOSFET
热载流子退化机理
热载流子效应 相似文献
3.
通过对功率金属氧化物半导体场效应晶体管在静态应力下的负偏置温度不稳定性的实验研究, 发现器件参数的退化随时间的关系遵循反应扩散模型所描述的幂函数关系, 并且在不同栅压应力下, 实验结果中均可观察到平台阶段的出现. 基于反应扩散理论的模型进行了仿真研究, 通过仿真结果分析和验证了此平台阶段对应于反应平衡阶段, 并且解释了栅压应力导致平台阶段持续时间不同的原因.
关键词:
功率金属氧化物半导体场效应晶体管
负偏置温度不稳定性
反应扩散模型 相似文献
4.
由于负偏置温度不稳定性和热载流子注入,p型金属氧化物半导体场效应晶体管(pMOSFET)将在工作中不断退化,而其SiO2/Si界面处界面态的积累是导致其退化的主要原因之一. 采用三维器件数值模拟方法,基于130 nm体硅工艺,研究了界面态的积累对相邻pMOSFET之间单粒子电荷共享收集的影响. 研究发现,随着pMOSFET SiO2/Si界面处界面态的积累,相邻pMOSFET漏端的单粒子电荷共享收集量均减少. 还研究了界面态的积累对相邻反相器中单粒子电荷共享收集
关键词:
负偏置温度不稳定性
电荷共享收集
双极放大效应
单粒子多瞬态 相似文献
5.
研究了深亚微米PMOS器件在负偏压温度(negative bias temperature, NBT) 应力前后的电流电压特性随应力时间的退化,重点分析了NBT应力对PMOS器件阈值电压漂移的影响,通过实验证明了在栅氧化层和衬底界面附近的电化学反应和栅氧化层内与氢相关的元素的扩散,是PMOS器件中NBT效应产生的主要原因.指出NBT导致的PMOS器件退化依赖于反应机理和扩散机理两种机理的平衡.
关键词:
深亚微米PMOS器件
负偏压温度不稳定性
界面态
氧化层固定正电荷 相似文献
6.
对0.18 μm互补金属氧化物半导体(CMOS)工艺的N型金属氧化物半导体场效应晶体管(NMOSFET)及静态随机存储器(SRAM)开展了不同剂量率下的电离总剂量辐照试验研究. 结果表明: 在相同累积剂量, SRAM的低剂量率辐照损伤要略大于高剂量率辐照的损伤, 并且低剂量率辐照损伤要远大于高剂量率辐照加与低剂量率辐照时间相同的室温退火后的损伤. 虽然NMOSFET 低剂量率辐照损伤略小于高剂量率辐照损伤, 但室温退火后, 高剂量率辐照损伤同样要远小于低剂量率辐照损伤. 研究结果表明0.18 μm CMOS工艺器件的辐射损伤不是时间相关效应. 利用数值模拟的方法提出了解释CMOS器件剂量率效应的理论模型. 相似文献
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以描述负折射材料中包含拉曼效应的高阶非线性薛定谔方程为模型,采用分步傅里叶算法数值分析了高阶效应,尤其是饱和非线性效应对自聚焦负折射率材料中的孤子拉曼自频移的影响。结果表明,在自聚焦负折射率材料中饱和非线性效应使孤子拉曼自频移速度加快;饱和非线性效应与负的自陡效应共同作用进一步加快孤子自频移的速度;饱和非线性效应同正的自陡效应、三阶色散效应共同作用时孤子拉曼自频移在整体上受到抑制。 相似文献
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随着CMOS器件的不断微缩,硅有源区面积的缩小,工艺导致的机械应力对器件的影响越来越显著,许多工艺步骤会造成有源区应力的累积.应力不仅导致器件性能对版图产生依赖性,而且带来各种可靠性问题,影响芯片的长期使用寿命.在很多情况下,应力相关的问题直接影响芯片制造的良率.在总结各种应力来源的基础上,回顾了到目前为止人们所观察或理解的应力对CMOS器件性能和可靠性的各种影响,提出了分析和解决工业生产中应力相关问题的基本思路.
关键词:
机械应力
CMOS 相似文献
13.
A.A. Bykov L.V. Litvin N.T. Moshegov A.I. Toropov 《Superlattices and Microstructures》1998,23(6):1285-1288
Photovoltaic effect is investigated for ballistic AlGaAs/GaAs rings under microwave radiation. The comparison of microwave EMF versus magnetic field dependencies and magnetoresistance shows that in ballistic rings the photovoltaic effect is due to the absence of central symmetry in microstructure geometry. 相似文献
14.
Effect of STI-induced mechanical stress on leakage current in deep submicron CMOS devices 总被引:1,自引:0,他引:1 下载免费PDF全文
The shallow trench isolation (STI) induced mechanical stress
significantly affects the CMOS device off-state leakage behaviour. In
this paper, we designed two types of devices to investigate this
effect, and all leakage components, including sub-threshold leakage
($I_{\rm sub})$, gate-induced-drain-leakage ($I_{\rm GIDL})$, gate
edge-direct-tunnelling leakage ($I_{\rm EDT})$ and
band-to-band-tunnelling leakage ($I_{\rm BTBT})$ were analysed. For
NMOS, $I_{\rm sub}$ can be reduced due to the mechanical stress
induced higher boron concentration in well region. However, the GIDL
component increases simultaneously as a result of the high well
concentration induced drain-to-well depletion layer narrowing as well
as the shrinkage of the energy gap. For PMOS, the only mechanical
stress effect on leakage current is the energy gap narrowing induced
GIDL increase. 相似文献
15.
Kida N Yamada T Konoto M Okimoto Y Arima T Koike K Akoh H Tokura Y 《Physical review letters》2005,94(7):077205
The optical magnetoelectric effect, which is a nonreciprocal directional dichroic response, has been demonstrated in a submicron patterned magnet by monitoring the diffracted visible or near-infrared light intensity. An artificial magnetic superstructure is composed of chevron shaped ">" islands made of the ferromagnetic permalloy Ni(80)Fe(20) with a pitch of 1 microm on silicon substrate, in which both space inversion and time reversal symmetry are broken simultaneously. On the basis of the light-polarization angle and magnetic field H dependence, and also comparing the results with the those of the submicron square patterns, we show that the optical magnetoelectric effect emerges as the finite change (approximately 10(-3) at room temperature in H of 500 Oe) of the diffracted intensity. 相似文献
16.
L. J. Kozlowski 《Opto-Electronics Review》2006,14(1):11-18
Infrared sensor designers have long maximized S/N ratio by employing pixel-based amplification in conjunction with supplemental
noise suppression. Instead, we suppress photodiode noise using novel SoC implementation with simple three transistor pixel;
supporting SoC components include a feedback amplifier having elements distributed amongst the pixel and column buffer, a
tapered reset clock waveform, and reset timing generator. The tapered reset method does not swell pixel area, compel processing
of the correlated reset and signal values, or require additional memory. Integrated in a 2.1 M pixel imager developed for
generating high definition television, random noise is ∼8e-at video rates to 225 MHz. Random noise of ∼30e-would otherwise
he predicted for the 5 μm 5 μm pixels having 5.5 fF detector capacitance with negligible image lag. Minimum sensor S/N ratio
is 52 dB with 1920 by 1080 progressive readout at 60 Hz, 72 Hz and 90 Hz. Fixed pattern noise is <2 DN via on-chip signal
processing.
The paper presented there appears in Infrared Photoelectronics, edited by Antoni Rogalski, Eustace L. Dereniak, Fiodor F. Sizov, Proc. SPIE Vol. 5957, 595701 (2005). 相似文献
17.
Gribelyuk MA McCartney MR Li J Murthy CS Ronsheim P Doris B McMurray JS Hegde S Smith DJ 《Physical review letters》2002,89(2):025502
Quantitative two-dimensional maps of electrostatic potential in device structures are obtained using off-axis electron holography with a spatial resolution of 6 nm and a sensitivity of 0.17 V. Estimates of junction depth and variation in electrostatic potential obtained by electron holography, process simulation, and secondary ion mass spectroscopy show close agreement. Measurement artifacts due to sample charging and surface "dead layers" do not need to be considered provided that proper care is taken with sample preparation. The results demonstrate that electron holography could become an effective method for quantitative 2D analysis of dopant diffusion in deep-submicron devices. 相似文献