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2020 China Semiconductor Technology International Conference (CSTIC)最新文献

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Yield Enhancement by Virtual Fabrication: Using Failure Bin Classification, Yield Prediction and Process Window Optimization to Identify and Prevent Process Failures 通过虚拟制造提高良率:利用失效仓分类、良率预测和工艺窗口优化来识别和预防工艺故障
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282443
Qingpeng Wang, Yu De Chen, Jacky Huang, Wuping Liu, Ervin Joseph
This paper provides an example of yield enhancement using virtual fabrication. A 6 transistors based static random access memory example on 7nm node technology was used in this case study. Yield loss caused by via contact-metal edge placement error was modeled and analyzed. The results show that yield can be enhanced from 48.4% to 99.0% through process window optimization and improved specification control. We identified high resistance failure as the top failure mode in both non-optimized and optimized process models.
本文提供了一个利用虚拟制造技术提高良率的实例。本文以一个基于6晶体管的7nm节点静态随机存取存储器为例进行了研究。模拟并分析了通孔接触-金属边缘放置误差造成的良率损失。结果表明,通过优化工艺窗口和改进规格控制,收率可从48.4%提高到99.0%。在非优化和优化过程模型中,我们都发现高电阻失效是最主要的失效模式。
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引用次数: 1
Crystal Oscillator Frequency compensation technology of High Precision Clock Synchronization for Time-triggered Ethernet 时间触发式以太网高精度时钟同步的晶振频率补偿技术
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282586
Haiying Yuan, Kai Zhang, Tong Zheng, Yichen Wang
Temperature change, aging and voltage fluctuation also cause clock deviation of the crystal oscillator frequency, which makes a great impact on the real-time communication and network stability in the distributed control system. While local clock value is periodically corrected based on SAE AS6802 clock synchronization protocol in Time- Triggered Ethernet, but a large cumulative error occurs to the calibration cycle, which reduces the clock synchronization accuracy. According to the severe influence of temperature on crystal oscillator frequency, a digital frequency calibration circuit is designed in Local_clock module ofTTEthernet nodes, and it is modeled based on the frequency error Look-Up table generated by Temperature-Frequency characteristics. The maximum clock deviation between network nodes was analyzed to verify the synchronization performance of the TTEthernet. Numerous experimental results show that proposed digital frequency calibration scheme achieves high clock synchronization accuracy.
温度变化、老化和电压波动也会引起晶体振荡器频率的时钟偏差,对集散控制系统的实时通信和网络稳定性造成很大影响。时间触发式以太网中基于SAE AS6802时钟同步协议的本地时钟值定期校正,但校正周期累积误差较大,降低了时钟同步精度。针对温度对晶体振荡器频率的严重影响,在以太网节点Local_clock模块中设计了数字频率校准电路,并基于温度-频率特性产生的频率误差查找表对其进行建模。分析了网络节点间的最大时钟偏差,验证了以太网的同步性能。大量实验结果表明,所提出的数字频率校准方案具有较高的时钟同步精度。
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引用次数: 0
High Performance HVNMOS Development for Advanced Planner Nand Flash 高级规划Nand闪存的高性能HVNMOS开发
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282600
Juanjuan Li, Zhi Tian, Xiao-Hua Ju, Tao Liu, Shaokang Yao, Haewan Yang, Yaoyu Chen
As the flash cell physical size is scaled down, the related down scaling of decoder and page buffer area are also a challenge for chip design. High performance N type MOS including HVN_PT (in word-line decode circuit) and HVN_PB (in page buffer circuit) for l×-nm planner NAND flash are described in this paper. These N type MOS adopted a series of optimized structure and process integrated methods based on 2D TCAD process and device simulation, to achieve high channel, junction breakdown, and isolation voltage with smaller transistor area limited by down scaled NAND flash cell unit. Finally, these structure and process integrated methods were validated in HLMC 12-inch l×-nm NAND process flow.
随着闪存单元物理尺寸的缩小,相应的解码器和页面缓冲区的缩小也是芯片设计的一个挑战。本文介绍了用于l×-nm规划NAND闪存的HVN_PT(字行解码电路)和HVN_PB(页面缓冲电路)的高性能N型MOS。这些N型MOS采用了一系列基于二维TCAD工艺和器件仿真的优化结构和工艺集成方法,在缩小的NAND闪存单元限制下,以更小的晶体管面积实现高通道、结击穿和隔离电压。最后,在HLMC 12英寸l×-nm NAND工艺流程中验证了这些结构和工艺集成方法。
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引用次数: 0
Optimization on Deposition of Aluminum Nitride by Pulsed Direct Current Reactive Magnetron Sputtering 脉冲直流反应磁控溅射沉积氮化铝的优化研究
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282480
Yu-Pu Yang, T. Lu, Song-Ho Wang, Hsueh-Er Chang, Peter j. Wang, Walter Lai, Y. Fuh, Tomi T. T. Li
In this study, pulsed dc reactive sputtering of aluminum nitride (AlN) thin films was investigated. The aluminum nitride thin films were deposited on Si (100) using a reactive direct current (DC) unbalanced magnetron sputtering system. The DC reactive sputtering was used in sputtering the aluminum targets in a mixture of argon (Ar) and nitrogen (N2) plasma. Processes of aluminum target sputtering were carried out in an atmosphere of a mixture of Ar and N2. However, pulsed DC reactive sputtering of aluminum targets was carried out at total pressures with N2:Ar ratios from 7:30 to 45:15. In-situ optical emission spectrometry (OES) was applied to obtain the optimal deposition rate and the highest sputtering yield from the effects of flow nitrogen/argon (N2:Ar) ratio and pulse frequency on OES intensity. Thus, we have compared Fourier-transform infrared spectroscopy (FTIR) spectra and X-ray diffraction (XRD) patterns of AlN films deposited on Si (100) by DC reactive sputtering with an Al target in the mixture of Ar and N2. FTIR and XRD investigated the quality of the films and the preferred orientation.
本文研究了氮化铝(AlN)薄膜的脉冲直流反应溅射。采用无功直流(DC)非平衡磁控溅射系统在Si(100)表面沉积氮化铝薄膜。采用直流反应溅射技术在氩气和氮气混合等离子体中溅射铝靶。在Ar和N2混合气氛中进行了铝靶溅射过程。在N2:Ar比为7:30 ~ 45:15的总压力下,对铝靶材进行了脉冲直流反应溅射。利用原位发射光谱法(OES)研究了流氮/氩(N2:Ar)比和脉冲频率对OES强度的影响,获得了最佳沉积速率和最高溅射率。因此,我们比较了在Ar和N2混合的Al靶材料中,用直流反应溅射沉积在Si(100)上的AlN薄膜的傅里叶变换红外光谱(FTIR)和x射线衍射(XRD)谱图。FTIR和XRD研究了薄膜的质量和择优取向。
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引用次数: 0
Solving CMP Challenges for Chemically Stable Materials and 3D Shapes 解决化学稳定材料和3D形状的CMP挑战
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282567
H. Morinaga
In order to expand the use of CMP technologies into new applications, it is necessary to develop polishing technologies for a diverse range of materials and shapes. To improve the material removal rate of chemically stable materials, it is important i) to increase the abrasive particle velocity (vs. polishing object) to maximize the friction, and ii) to increase the number of working (adhered/active) particles by controlling the surface charge. To polish 3D shape precisely, design of polishing consumables (3D pad, magnetic polish slurry, polishing compound) and accurate pressure control are the keys.
为了将CMP技术扩展到新的应用领域,有必要开发针对各种材料和形状的抛光技术。为了提高化学稳定材料的材料去除率,重要的是1)提高磨料颗粒速度(相对于抛光物体)以最大限度地增加摩擦,2)通过控制表面电荷来增加工作(粘附/活性)颗粒的数量。为了精确抛光3D形状,抛光耗材(3D垫、磁性抛光浆、抛光剂)的设计和精确的压力控制是关键。
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引用次数: 0
Role of slurry Additions on Chemical Mechanical Polishing of Cu/Ru/TEOS in H2O2-based Slurry 浆料添加剂对h2o2基浆料中Cu/Ru/TEOS化学机械抛光的影响
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282596
Chao Wang, Jianwei Zhou, Chenwei Wang, Xue Zhang
In this paper, the influence of a novel complex agent (NH4)2SO3 and inhibitor 2,2’ -[[(methyl-1H-benzotriazol-1-yl) methyl]imino]diethanol (TT) based on hydrogen peroxide (H2O2) on Cu/Ru/TEOS was studied. Since our research group has studied the relationship between Cu and Ru before, we now make further supplement. The results showed that both Ru and TEOS increased with the increase of ammonium ion/NH4+) concentration, and the mechanism was studied by means of electrochemistry, possibly because of the electrostatic attraction between the NH4+ ions and Ru, and the addition of ammonium ions may reduce the thickness of the double electric layer on the surface of TEOS. So the Ru and TEOS removal rate goes up.
本文研究了一种新型配合剂(NH4)2SO3和以过氧化氢(H2O2)为基料的抑制剂2,2′-[[(甲基- 1h -苯并三唑-1-基)甲基]亚氨基]二乙醇(TT)对Cu/Ru/TEOS的影响。由于我们课题组之前已经研究过Cu和Ru的关系,所以我们现在做进一步的补充。结果表明,Ru和TEOS均随着铵离子/NH4+)浓度的增加而增加,并通过电化学手段研究了其机理,可能是由于NH4+离子与Ru之间的静电吸引作用,而铵离子的加入可能会降低TEOS表面双电层的厚度。所以Ru和TEOS的去除率上升。
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引用次数: 0
Characterterization of Multi-Scale Nanosilver Paste Reinforced with SIC Particles SIC颗粒增强多尺度纳米银浆料的表征
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282590
Ziwei Jiang, Yongqian Sun, Qiaoran Zhang, Zhenlin Lv, Yan-pei Wu, Weijuan Xi, Cheng Zhou, Shujin Chen, Maomao Zhang, Johan Liu, Xiuzhen Lu
Nanosilver paste with high operation temperature and low sintering temperature has attracted more and more attention for its promising application in high power devices. In this paper, the thermal properties of multi-scale nanosilver paste composed of nanometer and micrometer silver particles, and Ag-coated SiC particles were investigated. The thermal conductivity of multi-scale nanosilver paste increases with the increasing amount of SiC particles with Ag coating. The maximum value of Vickers hardness for multi-scale nanosilver paste with 0.5 wt.% Ag-coated SiC particles were 24.
高操作温度和低烧结温度的纳米银浆料在大功率器件中的应用前景越来越受到人们的关注。本文研究了由纳米级、微米级银颗粒和镀银SiC颗粒组成的多尺度纳米银浆料的热性能。多尺度纳米银浆料的导热系数随SiC颗粒用量的增加而增加。0.5 wt.% ag包覆SiC颗粒的多尺度纳米银浆料的维氏硬度最大值为24。
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引用次数: 1
Reliability Simulation and Life Prediction of Sn63Pb37 BGA Solder Joint Under Thermal Cycling Load 热循环载荷下Sn63Pb37 BGA焊点可靠性仿真及寿命预测
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282446
Jiahao Liu, Liang He, Hua Chen, Pan Zhao, Yahui Su, Li Chao, Q. Pan
The reliability of solder joint determines whether the electronic system operates steadily and lastingly. As a common type of load, thermal stress has a non-ignorable effect on the reliability of electronic products. During the thermal cycles, the solder joints are subjected to periodic tensile and compressive stresses since the difference in thermal expansion coefficient of adjacent materials, whereby causing creep and thermal fatigue damage. As fatigue damage builds up, cracks generate and propagate continuously, which will lead to solder joint failure. In this paper, the finite element simulation method is used to simulate the stress-strain distribution in the Sn63Pb37 BGA solder joint array under temperature cyclic loading, the position of dangerous solder joint is located, and the lifetime of solder joints is predicted through the Manson-coffin model. Furthermore, the influence of PCB thickness and solder joint height on lifetime are analyzed.
焊点的可靠性决定着电子系统能否稳定、持久地运行。热应力作为一种常见的载荷类型,对电子产品的可靠性有着不可忽视的影响。在热循环过程中,由于相邻材料的热膨胀系数不同,焊点受到周期性的拉压应力,从而产生蠕变和热疲劳损伤。随着疲劳损伤的积累,裂纹不断产生和扩展,最终导致焊点失效。本文采用有限元模拟方法,模拟了温度循环加载下Sn63Pb37 BGA焊点阵列的应力应变分布,确定了危险焊点的位置,并通过Manson-coffin模型预测了焊点的寿命。进一步分析了PCB板厚度和焊点高度对寿命的影响。
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引用次数: 2
Study of High-Precision Interferometer Dynamic Switching for TFT Long-Travel-Range Moving Stage TFT长行程移动台高精度干涉仪动态切换研究
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282492
Dan Chen, Zhiyong Yang, Yuebin Zhu
Interferometer dynamic switching (IDS) is one of core technologies of long-travel-range moving stage of high-generation TFT scanner. The accuracy and repeat -ability of IDS have a major influence on the servo performance of moving stage, further, on the hierarchical overlay error of lithography machine. Zeroing model and dynamic switching strategy are of great significance to IDS. To solve IDS problem efficiently, in this paper, a novel zeroing model as well as a dynamic switching strategy have been proposed. Experiment results show that, the IDS error specification has been satisfied in both single and multiple IDS test scenarios by using our proposed method.
干涉仪动态切换是高代TFT扫描仪长行程移动台的核心技术之一。IDS的精度和重复能力对移动工作台的伺服性能有重要影响,进而影响光刻机的分层叠加误差。归零模型和动态切换策略对入侵检测系统具有重要意义。为了有效地解决入侵检测问题,本文提出了一种新的归零模型和动态切换策略。实验结果表明,该方法在单个和多个IDS测试场景下都满足了IDS的误差规范。
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引用次数: 0
Effects of Electron Beam on Photo Resist Shrinkage and Critical Dimension in SEM Measurement 电子束对光刻胶收缩率及SEM测量中临界尺寸的影响
Pub Date : 2020-06-26 DOI: 10.1109/CSTIC49141.2020.9282495
Yuyang Bian, Hongxu Sun, Lipeng Wang, Xijun Guan, Xiaobo Guo, Biqiu Liu, Cong Zhang, Jun Huang, Yu Zhang
Scanning electron microscope (SEM) measurement is the dominant method to obtain critical dimension (CD) in lithography. In SEM measurement, electron beam exposed on photo resist (PR) will affect PR physical-chemically and cause PR shrinkage inevitably. This phenomenon is well-known in lithography and also studied by many researchers. In this paper, we reviewed previous research results and investigated the PR shrinkage effects on CD measurement of 193nm immersion photo resist in 14nm node. With patterns sizing down, it is important to choose an appropriate voltage, current and frame to avoid large amount shrinkage in the measurement. A 30nm size CD shrinks more than 10% until getting saturation. Different patterns and CD sizes possess different through pitch shrinkage performance, which means PR shrinkage will also impact OPC model setup.
扫描电镜(SEM)测量是光刻中获得临界尺寸(CD)的主要方法。在扫描电镜测量中,电子束照射在光刻胶上,会对光刻胶产生物理化学影响,不可避免地造成光刻胶的收缩。这种现象在光刻中是众所周知的,也被许多研究者研究过。本文综述了前人的研究成果,探讨了PR收缩对193nm浸没光阻14nm节点CD测量的影响。随着图案尺寸的缩小,选择合适的电压,电流和框架以避免在测量中大量收缩是很重要的。30nm尺寸的CD在达到饱和之前收缩超过10%。不同的图案和CD尺寸具有不同的螺距收缩性能,这意味着PR收缩也会影响OPC模型的设置。
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引用次数: 1
期刊
2020 China Semiconductor Technology International Conference (CSTIC)
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