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Proceedings of Technical Program of 2012 VLSI Technology, System and Application最新文献

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New criteria for the RDF induced drain current variation considering strain and transport effects in strain-silicon CMOS devices 考虑应变和输运效应的应变硅CMOS器件中RDF诱发漏极电流变化的新准则
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210148
E. Hsieh, S. Chung, J.C. Wang, C. S. Lai, C. Tsai, R. Huang, C. Tsai, C. Liang
In this paper, we have studied the Id variation in linear and saturation region by considering the strain-induced effect and the carrier transport of strained CMOS devices. It was found that the origin of linear Id variation comes from the mobility scattering; while in saturation region, the Id variation is dominated by the injection velocity. The higher the injection velocity is, the smaller the saturation Id variation becomes. These results provide us a guideline for achieving good variability control of strain-based CMOS technologies.
本文通过考虑应变效应和载流子输运,研究了CMOS器件在线性区和饱和区的Id变化。发现线性Id变化的来源是迁移率散射;而在饱和区,流速的变化主要受注入速度的影响。注入速度越高,饱和度变化越小。这些结果为我们实现基于应变的CMOS技术的良好可变性控制提供了指导。
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引用次数: 0
Comparative study of geometry-dependent capacitances of planar FETs and double-gate FinFETs: Optimization and process variation 平面场效应管与双栅finfet几何相关电容的比较研究:优化与工艺变化
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210129
C. Sohn, C. Kang, R. Baek, D. Choi, H. Sagong, E. Jeong, Jeong-Soo Lee, P. Kirsch, R. Jammy, J. Lee, Y. Jeong
We quantitatively compared the parasitic capacitance of the planar FETs and the DG FinFETs. Optimization with a fixed Sfin-to-Hfin ratio significantly reduces Cpara/W, which renders DG FinFETs comparable to planar FETs. Process variation on Wfin and Hfin should be controlled, otherwise, the Cpara uniformity will be worse for DG FinFETs than it is planar FETs.
我们定量地比较了平面场效应管和DG finfet的寄生电容。采用固定的fin- hfin比进行优化可显著降低Cpara/W,从而使DG finfet与平面fet相当。应控制Wfin和Hfin的工艺变化,否则,DG fet的Cpara均匀性将比平面fet差。
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引用次数: 7
Characteristics of HfZrOx gate stack engineering for reliability improvement on 28nm HK/MG CMOS technology 提高28nm HK/MG CMOS技术可靠性的HfZrOx栅堆工程特点
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210162
C. Tsai, C. Yang, C. Hsu, C. M. Lai, K. Y. Lo, C. G. Chen, R. Huang, C. T. Tsai, L. Hung, J. You, W. Hung, T. F. Chen, O. Cheng, J. Y. Wu, S. F. Tzou, C. Liang, I. Chen
High-K/Metal-Gate (HK/MG) reliability TDDB and BTI are investigated systematically for the first time through HfZrOx gate stack engineering. To meet reliability requirements, it is shown that the HK film thickness, the position and concentration of a Zr dopant, utilizing post deposition anneal (PDA), and decoupled plasma nitridation (DPN) are important factors.
通过HfZrOx栅堆工程,首次系统地研究了高k /MG金属栅(HK/MG)可靠性TDDB和BTI。为了满足可靠性要求,研究表明HK膜厚度、Zr掺杂剂的位置和浓度、沉积后退火(PDA)和去耦等离子体氮化(DPN)是重要的影响因素。
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引用次数: 10
Improvement of resistive switching memory parameters using IrOx Nanodots in high-κ AlOx Cross-Point 利用IrOx纳米点改善高κ AlOx交叉点的阻性开关记忆参数
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210126
W. Banerjee, S. Maikap
The improvement in resistive switching memory parameters by embedding IrOx nanodots in IrOx/AlOx/IrOx NDs/AlOx/W cross-point structure is reported. The fabricated memory devices exhibit MLC operation of both LRS and HRS, excellent read endurance of >;106 times, program/erase endurance of >;105 cycles, robust data retention of >;104s at 125°C with a small operation voltage of ±2V and a low CC of <;200 μA.
报道了在IrOx/AlOx/IrOx NDs/AlOx/W交叉点结构中嵌入IrOx纳米点对电阻开关存储器参数的改善。所制备的存储器件具有LRS和HRS的MLC操作,优异的读取寿命> 106次,程序/擦除寿命> 105个周期,在125°C下具有> 104s的稳健数据保留,工作电压小(±2V), CC低(< 200 μA)。
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引用次数: 1
Superior filament formation control in HfO2 based RRAM for high-performance low-power operation of 1 µA to 20 µA at +/− 1V 基于HfO2的RRAM具有优越的灯丝形成控制,可实现+/−1V下1µA至20µA的高性能低功耗工作
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210102
D. Gilmer, S. Koveshnikov, B. Butcher, G. Bersuker, A. Kalantarian, M. Sung, R. Geer, Y. Nishi, P. Kirsch, R. Jammy
Low operation current and voltage range are required for scaled low power RRAM devices in high density memory cell arrays. In this work, for the first time we demonstrate 1 uA, +/- 1V bipolar switching of TiN/HfOx/Zr/W RRAM devices. High switching performance up to 108 cycles at low power and a 100× reduction of the high-resistance-state current was achieved by identification and utilization of key parameters for establishing superior control of the conductive filament formation.
在高密度存储单元阵列中,低功耗RRAM器件需要低工作电流和低电压范围。在这项工作中,我们首次展示了TiN/HfOx/Zr/W RRAM器件的1ua, +/- 1V双极开关。通过识别和利用控制导电丝形成的关键参数,实现了低功率下高达108次的高开关性能,并将高阻状态电流降低了100倍。
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引用次数: 8
Metal stanogermanide contacts with enhanced thermal stability for high mobility germanium-tin field-effect transistor 用于高迁移率锗锡场效应晶体管的具有增强热稳定性的金属双锗酰胺触点
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210151
Lanxiang Wang, G. Han, S. Su, Qian Zhou, Yue Yang, P. Guo, Wei Wang, Y. Tong, P. S. Lim, C. Xue, Qiming Wang, B. Cheng, Y. Yeo
We report a novel metal stanogermanide contact metallization process for high-mobility germanium-tin (Ge0.947Sn0.053 or GeSn) channel p-MOSFETs. Nickel-Platinum (NiPt) alloy was used to react with GeSn to form a multi-phase Ni and Pt stanogermanide [NiGeSn+Ptx(GeSn)y] contact on epitaxial Ge0.947Sn0.053. Rapid thermal annealing of co-sputtered Ni and Pt on GeSn/Ge (100) at temperatures from 350 °C to 550 °C in N2 was used for the stanogermanide formation. Compared with nickel stanogermanide (NiGeSn) contact, the Pt-incorporated contact, i.e. NiGeSn+Ptx(GeSn)y, exhibits enhanced thermal stability in a wide range of formation temperatures.
我们报道了一种新型的高迁移率锗锡(Ge0.947Sn0.053或GeSn)沟道p- mosfet的金属双锗化接触金属化工艺。采用镍铂(NiPt)合金与GeSn反应,在外延Ge0.947Sn0.053上形成Ni和Pt双格manide [NiGeSn+Ptx(GeSn)y]多相触点。在350 ~ 550℃的N2条件下,对GeSn/Ge(100)上共溅射的Ni和Pt进行快速热退火,形成双锗酰胺。与双胍化镍(NiGeSn)触点相比,加入pt的触点(即NiGeSn+Ptx(GeSn)y)在较宽的地层温度范围内表现出更强的热稳定性。
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引用次数: 4
Transition to EUV lithography 向极紫外光刻技术过渡
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210110
S. Wurm
Today's materials and tool infrastructure is supporting EUVL for pilot line applications with industry efforts focused on addressing the remaining challenges to introduce EUV into HVM at the 22 nm half-pitch in 2014/15. Ensuring EUV extendibility to the sub-16 nm half-pitch will require additional efforts, such as enabling the research and development tools to support the materials development for next generation EUV resist and EUV mask technology. SEMATECH is leading this industry effort. With the introduction of EUVL, SEMATECH's lithography focus is shifting towards addressing the challenges for patterning at the ≤ 10 nm half-pitch.
如今的材料和工具基础设施正在支持EUVL在中试生产线的应用,业界正致力于解决在2014/15年将EUV引入22纳米半间距HVM的剩余挑战。确保EUV可扩展到低于16纳米半间距需要额外的努力,例如使研发工具能够支持下一代EUV电阻和EUV掩模技术的材料开发。SEMATECH正在引领这一行业的努力。随着EUVL的引入,SEMATECH的光刻重点正在转向解决≤10nm半间距的图案挑战。
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引用次数: 5
A study of novel ALD beryllium oxide as an interface passivation layer for Si MOS devices 新型ALD氧化铍作为Si MOS器件界面钝化层的研究
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210153
J. Yum, G. Bersuker, T. Hudnall, C. Bielawski, P. Kirsch, S. Banerjee
To overcome the issues of mobility degradation and charge trapping between the Si channel and high-k gate dielectric in metal-oxide-semiconductor field effect transistors (MOSFETs), thin BeO layers are deposited by atomic layer deposition (ALD) between (100) p-Si substrates and HfO2 high-k gate dielectric as an alternative interface passivation layer (IPL) to SiO2. We discuss the electrical properties of BeO/HfO2 gate stacks in MOSFETs. Compared to SiO2/HfO2 and Al2O3/HfO2 reference gate stacks, the novel dielectric, BeO, exhibits high drive current, slightly elevated transconductance (Gm), low subthreshold swing (SS), and high mobility at a high electric field.
为了克服金属氧化物半导体场效应晶体管(mosfet)中Si通道和高k栅极介电介质之间的迁移率退化和电荷捕获问题,在(100)p-Si衬底和HfO2高k栅极介电介质之间通过原子层沉积(ALD)沉积薄BeO层,作为SiO2的替代界面钝化层(IPL)。讨论了mosfet中BeO/HfO2栅极堆的电学特性。与SiO2/HfO2和Al2O3/HfO2基准栅叠层相比,新型电介质BeO在高电场下具有高驱动电流、略高跨导(Gm)、低亚阈值摆幅(SS)和高迁移率。
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引用次数: 4
PBTI improvement in gate last HfO2 gate dielectric nMOSFET due to Zr incorporation Zr掺入对栅末HfO2栅介电nMOSFET的PBTI改善
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210161
S. Deora, G. Bersuker, C. Young, J. Huang, K. Matthews, K. Ang, T. Nagi, C. Hobbs, P. Kirsch, R. Jammy
PBTI in the HfxZryO gate dielectric low temperature full gate last process flow nMOSFETs was demonstrated to be reduced compared to the HfO2 gate dielectric devices of a similar EOT. PBTI degradation in both stacks was successfully modeled within a common framework of fast and slow electron trapping components in the gate dielectrics. The fast component was assigned to the resonance electron trapping in the pre-existing high-κ dielectric defects while a slow, temperature dependent component could be attributed to the migration of the trapped electrons to unoccupied defect sites. Lower PBTI degradation in the Zr:HfO2 stack was shown to be caused by a smaller fast electron trapping component.
与类似EOT的HfO2栅极介电器件相比,HfxZryO栅极介电低温全栅末制程nmosfet中的PBTI有所降低。在栅极电介质中快速和慢速电子捕获元件的共同框架内,成功地模拟了两个堆叠中的PBTI降解。快速成分归因于先前存在的高κ介电缺陷中的共振电子捕获,而缓慢的、温度相关的成分可归因于捕获电子向未占据的缺陷位置的迁移。Zr:HfO2叠层中较低的PBTI降解是由较小的快速电子捕获成分引起的。
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引用次数: 1
A high density cylinder-type MIM capacitor integrated with advanced 28nm logic High-K/Metal-Gate process for embedded DRAM 一种高密度圆柱形MIM电容器,集成了先进的28nm逻辑高k /金属门工艺,用于嵌入式DRAM
Pub Date : 2012-04-23 DOI: 10.1109/VLSI-TSA.2012.6210164
K. Tu, C. Wang, Y. Hsieh, Y. Ting, C. Chang, C. Pai, K. Tzeng, H. Chu, H. L. Lin, Y. Chang, C. Pen, K. W. Chen, T. Hsieh, C. Tsai, K. C. Huang, W. Chiang, M. Wang, C. Wang, C. Tsai, S. Wuu, H. Hwang, L. Tran
A cylinder-type Metal-Insulator-Metal (MIM) capacitor integrated with advanced 28nm logic High-K/Metal-Gate (HKMG) process for embedded DRAM has been developed. The stacked cell capacitor is formed using low temperature high-K dielectrics to achieve sufficient storage capacitance without significantly impacting logic transistors. This paper describes techniques to achieve cylinder-type MIM capacitor's capacitance >;10fF/cell and keep the low leakage (<;0.1fA/cell) requirements. The MIM dielectric reliability test passes Time Dependent Dielectric Breakdown (TDDB) lifetime (>;10 years). The test vehicle is composed of 72 macros of 4.5Mb each. We successfully demonstrate fully functional good yield of 28nm eDRAM 324Mb test vehicle with access speed >;330MHz.
采用先进的28nm逻辑高k /金属栅极(HKMG)工艺,研制了一种用于嵌入式DRAM的圆柱形金属-绝缘体-金属(MIM)电容器。堆叠电池电容器采用低温高k介电体形成,在不显著影响逻辑晶体管的情况下实现足够的存储电容。本文介绍了实现圆柱形MIM电容器电容> 10fF/cell并保持低漏损(10年)的技术。测试飞行器由72个宏组成,每个宏大小为4.5Mb。我们成功地展示了全功能良好的28nm eDRAM 324Mb测试车,访问速度>;330MHz。
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引用次数: 2
期刊
Proceedings of Technical Program of 2012 VLSI Technology, System and Application
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