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HfO_2高k栅介质等效氧化层厚度的提取 被引量:3
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作者 陈勇 赵建明 +2 位作者 韩德栋 康晋锋 韩汝琦 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第5期852-856,共5页
分两步提取了HfO2高k栅介质等效氧化层厚度(EOT).首先,根据MIS测试结构等效电路,采用双频C-V特性测试技术对漏电流和衬底电阻的影响进行修正,得出HfO2高k栅介质的准确C-V特性.其次,给出了一种利用平带电容提取高k介质EOT的方法,该方法... 分两步提取了HfO2高k栅介质等效氧化层厚度(EOT).首先,根据MIS测试结构等效电路,采用双频C-V特性测试技术对漏电流和衬底电阻的影响进行修正,得出HfO2高k栅介质的准确C-V特性.其次,给出了一种利用平带电容提取高k介质EOT的方法,该方法能克服量子效应所产生的反型层或积累层电容的影响.采用该两步法提取的HfO2高k栅介质EOT与包含量子修正的Poisson方程数值模拟结果对比,误差小于5%,验证了该方法的正确性. 展开更多
关键词 高介电常数栅介质 等效氧化层厚度 氧化
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高k栅介质/金属栅结构CMOS器件的等效氧化层厚度控制技术 被引量:1
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作者 陈世杰 王文武 +3 位作者 蔡雪梅 陈大鹏 王晓磊 韩锴 《电子工业专用设备》 2010年第3期11-16,共6页
随着CMOS器件特征尺寸的不断缩小,绝缘栅介质层也按照等比例缩小的原则变得越来越薄,由此而产生的栅漏电流增大和可靠性降低等问题变得越来越严重。传统的SiO2栅介质材料已不能满足CMOS器件进一步缩小的需要,而利用高介电常数栅介质(高k... 随着CMOS器件特征尺寸的不断缩小,绝缘栅介质层也按照等比例缩小的原则变得越来越薄,由此而产生的栅漏电流增大和可靠性降低等问题变得越来越严重。传统的SiO2栅介质材料已不能满足CMOS器件进一步缩小的需要,而利用高介电常数栅介质(高k)取代SiO2已成为必然趋势。综述了国内外对纳米尺度CMOS器件高k栅介质的等效氧化层厚度(EOT)控制技术的一些最新研究成果,并结合作者自身的工作介绍了EOT缩小的动因、方法和展望。 展开更多
关键词 高K栅介质 等效氧化层厚度(EOT) 金属栅 氧吸除
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具有应变沟道及EOT 1.2nm高性能栅长22nm CMOS器件
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作者 徐秋霞 钱鹤 +6 位作者 段晓峰 刘海华 王大海 韩郑生 刘明 陈宝钦 李海欧 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第z1期283-290,共8页
深入研究了亚30nm CMOS关键工艺技术,特别是提出了一种新的低成本的提高空穴迁移率的技术--Ge预非晶化S/D延伸区诱生沟道应变技术,它使栅长90nm pMOS空穴有效迁移率在0.6MV/cm电场下提高32%.而且空穴有效迁移率的改善,随器件特征尺寸缩... 深入研究了亚30nm CMOS关键工艺技术,特别是提出了一种新的低成本的提高空穴迁移率的技术--Ge预非晶化S/D延伸区诱生沟道应变技术,它使栅长90nm pMOS空穴有效迁移率在0.6MV/cm电场下提高32%.而且空穴有效迁移率的改善,随器件特征尺寸缩小而增强.利用零阶劳厄线衍射的大角度会聚束电子衍射分析表明,在沟道区相应的压应变为-3.6%.在集成技术优化的基础上,研制成功了高性能栅长22nm应变沟道CMOS器件及栅长27nm CMOS 32分频器电路(其中分别嵌入了57级/201级环形振荡器),EOT为1.2nm,具有Ni自对准硅化物. 展开更多
关键词 应变硅沟道 压应力 Ge预非晶化注入 等效氧化层厚度 栅长 CMOS
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新一代CMOS器件栅介质材料研究进展
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作者 郭鸣 周松华 刘昌鑫 《井冈山大学学报(自然科学版)》 2011年第5期76-81,共6页
随着微电子技术的飞速发展,按照摩尔定律发展的要求,SiO2的极限厚度已经成为Si基集成电路提高集成度的瓶颈。寻求代替SiO2的其它新一代高k栅介质已成为当今微电子技术发展的必然趋势。文章介绍了几种最有可能成为下一代栅介质的高k材料... 随着微电子技术的飞速发展,按照摩尔定律发展的要求,SiO2的极限厚度已经成为Si基集成电路提高集成度的瓶颈。寻求代替SiO2的其它新一代高k栅介质已成为当今微电子技术发展的必然趋势。文章介绍了几种最有可能成为下一代栅介质的高k材料,并对其研究进展和存在的问题进行了阐述。 展开更多
关键词 高介电常数 栅介质 等效氧化层厚度 漏电流
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适于16纳米及以下的器件和电路的集成工艺基础研究
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作者 尹海洲 刘洪刚 +2 位作者 朱慧珑 王文武 刘云飞 《科技创新导报》 2016年第8期174-174,共1页
该研究2013年度主要围绕研究高迁移率半导体表面态及钝化机理,探索热力学稳定的高k栅介质材料方面,主要开展解决等效氧化层厚度表征,金属栅功函数的调制、沟道迁移率的下降以及高k栅介质的可靠性等相关问题,并实现器件质量的高k介质材... 该研究2013年度主要围绕研究高迁移率半导体表面态及钝化机理,探索热力学稳定的高k栅介质材料方面,主要开展解决等效氧化层厚度表征,金属栅功函数的调制、沟道迁移率的下降以及高k栅介质的可靠性等相关问题,并实现器件质量的高k介质材料与高迁移率沟道材料的集成。 展开更多
关键词 高迁移率沟道 高K栅介质 半导体表面态 等效氧化层厚度 金属栅功函数
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高k HfO2栅介质淀积后退火工艺研究
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作者 刘倩倩 魏淑华 +2 位作者 杨红 张静 闫江 《半导体技术》 CAS CSCD 北大核心 2018年第4期285-290,共6页
研究了淀积后退火(PDA)工艺(包括退火环境和退火温度)对高介电常数(k)HfO2栅介质MOS电容(MOSCAP)电学特性的影响。通过对比O2和N2环境中,不同退火温度下的HfO2栅介质MOSCAP的C-V曲线发现,高k HfO2栅介质在N2环境中退火时具有更... 研究了淀积后退火(PDA)工艺(包括退火环境和退火温度)对高介电常数(k)HfO2栅介质MOS电容(MOSCAP)电学特性的影响。通过对比O2和N2环境中,不同退火温度下的HfO2栅介质MOSCAP的C-V曲线发现,高k HfO2栅介质在N2环境中退火时具有更大的工艺窗口。通过对HfO2栅介质MOSCAP的等效氧化层厚度(dEOT)、平带电压(Vfb)和栅极泄漏电流(Ig)等参数进一步分析发现,与O2环境相比,高k HfO2栅介质在N2环境中PDA处理时dEOT和Ig更小、Vfb相差不大,更适合纳米器件的进一步微缩。HfO2栅介质PDA处理的最佳工艺条件是在N2环境中600℃下进行。该优化条件下高k HfO2栅介质MOSCAP的dEOT=0.75 nm,Vfb=0.37 V,Ig=0.27 A/cm-2,满足14或16 nm技术节点对HfO2栅介质的要求。 展开更多
关键词 HFO2 淀积后退火(PDA) C-V特性 等效氧化层厚度 平带电压 栅极泄漏电流
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Electrical Properties of Ultra Thin Nitride/Oxynitride Stack Dielectrics pMOS Capacitor with Refractory Metal Gate
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作者 钟兴华 吴峻峰 +1 位作者 杨建军 徐秋霞 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第4期651-655,共5页
Electrical properties of high quality ultra thin nitride/oxynitride(N/O)stack dielectrics pMOS capacitor with refractory metal gate electrode are investigated,and ultra thin (<2 nm) N/O stack gate dielectrics with ... Electrical properties of high quality ultra thin nitride/oxynitride(N/O)stack dielectrics pMOS capacitor with refractory metal gate electrode are investigated,and ultra thin (<2 nm) N/O stack gate dielectrics with significant low leakage current and high resistance to boron penetration are fabricated.Experiment results show that the stack gate dielectric of nitride/oxynitride combined with improved sputtered tungsten/titanium nitride (W/TiN) gate electrode is one of the candidates for deep sub-micron metal gate CMOS devices. 展开更多
关键词 equivalent oxide thickness nitride/oxynitride gate dielectric stack high k boron-penetration metal gate
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A High Performance Sub-100nm Nitride/Oxynitride Stack Gate Dielectric CMOS Device with Refractory W/TiN Metal Gates
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作者 钟兴华 周华杰 +1 位作者 林钢 徐秋霞 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第3期448-453,共6页
By complementing the equivalent oxide thickness (EOT) of a 1.7nm nitride/oxynitride (N/O) stack gate dielectric (EOT- 1.7nm) with a W/TiN metal gate electrode,metal gate CMOS devices with sub-100nm gate length a... By complementing the equivalent oxide thickness (EOT) of a 1.7nm nitride/oxynitride (N/O) stack gate dielectric (EOT- 1.7nm) with a W/TiN metal gate electrode,metal gate CMOS devices with sub-100nm gate length are fabricated in China for the first time. The key technologies adopted to restrain SCE and to improve drive ability include a 1.7nm N/O stack gate dielectric, non-CMP planarization technology, a T-type refractory W/TiN metal stack gate electrode, and a novel super steep retrograde channel doping using heavy ion implantation and a double sidewall scheme. Using these optimized key technologies, high performance 95nm metal gate CMOS devices with excellent SCE and good driving ability are fabricated. Under power supply voltages of VDS ± 1.5V and VGS± 1.8V,drive currents of 679μA/μm for nMOS and - 327μA/μm for pMOS are obtained. A subthreshold slope of 84.46mV/dec, DIBL of 34.76mV/V, and Vth of 0.26V for nMOS, and a subthreshold slope of 107.4mV/dec,DIBL of 54.46mV/V, and Vth of 0.27V for pMOS are achieved. These results show that the combined technology has indeed thoroughly eliminated the boron penetration phenomenon and polysilicon depletion effect ,effectively reduced gate tunneling leakage, and improved device reliability. 展开更多
关键词 equivalent oxide thickness nitride/oxynitride gate dielectric stack W/TiN metal gate non-CMP planarization
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System integration and innovation of operating 20 kt combined heavy-haul train on Datong-Qinhuangdao line 被引量:2
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作者 Geng Zhixiu 《Engineering Sciences》 EI 2008年第3期12-26,共15页
Datong-Qinhuangdao line, as the first electrified double-track heavy-haul line dedicated to coal transport in China, extends from Datong in the west, and reaches Qinhuangdao in the east, opened to traffic in December,... Datong-Qinhuangdao line, as the first electrified double-track heavy-haul line dedicated to coal transport in China, extends from Datong in the west, and reaches Qinhuangdao in the east, opened to traffic in December, 1992, totaling 653 km with the designed annual traffic volume of 1×108 t. In order to meet the demands of national economic development, the transport capacity of the line must be enhanced greatly. Depending on independent innovation, MOR, for the first time in the world,realizes the integration between GSM-R and Locotrol, the integration between 800 MHz digital radio and Locotrol, and the integration between a single set of Locotrol and SS4 locomotive. Meanwhile, CR develops equipment portfolio for heavy-haul through combining 2 high power locomotives of HXD series (means harmony) with controllable EOT. Relying on integration and innovation, it succeeds in operating 20 kt-level combined heavy-haul train on Datong-Qinhuangdao line, which tripled the annual traffic volume of the line from 1×108 t in 2002 to 3×108 t in 2007. 展开更多
关键词 China railways Datong-Qinhuangdao line 20 kt-level combined heavy-haul train integration and innovation
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超高频化合物基CMOS器件和电路研究
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《中国科技成果》 2016年第19期18-18,20,共2页
随着晶体管尺寸的持续缩小,不断增加的晶体管密度与工作频率造成集成电路散热量急剧增大,互连寄生效应成为影响芯片功耗与速度的关键因素,应变硅沟道日益逼近极限,在硅基平台上引入更高迁移率的非硅沟道材料来提升CMOS的性能已成为1... 随着晶体管尺寸的持续缩小,不断增加的晶体管密度与工作频率造成集成电路散热量急剧增大,互连寄生效应成为影响芯片功耗与速度的关键因素,应变硅沟道日益逼近极限,在硅基平台上引入更高迁移率的非硅沟道材料来提升CMOS的性能已成为10纳米节点以下高性能逻辑技术的重要发展方向。本课题针对最具应用前景的InP基CMOS技术,围绕InP基半导体材料的生长动力学与迁移率控制和高K介质材料的集成生长与界面控制两个急需解决的核心科学问题进行探索性研究:通过研究化合物半导体材料组分、应力应变、界面散射、能带结构等对载流子输运规律的影响,提出具有高电子迁移率、高空穴迁移率特征的n型与p型MOS器件沟道材料的解决方案;通过研究InP基含铟化合物半导体与含锑的化合物半导体的载流子输运规律,并采用应变工程提高载流子的迁移率,在InP衬底上同时实现高迁移率n型与p型CMOS器件材料;通过研究化合物半导体表面态及钝化机理,探索热力学稳定的高k栅介质材料并解决其等效氧化层厚度表征问题,解决金属栅功函数的调制、沟道迁移率的下降、高k栅介质的可靠性等相关问题;通过研究低电阻源漏结构、电场分布、短沟道效应与电极寄生效应对频率性能的影响,提出限制器件频率特性的关键因数,建立有效的集成技术途径与解决方案;培养和建立一支学术水平高、创新能力强的科研队伍,获得一系列在国际上有影响的原创性成果,形成一套从材料生长到器件制备、具有完全自主知识产权的化合物CMOS器件的核心技术。 展开更多
关键词 CMOS器件 化合物半导体 集成电路 高电子迁移率 超高频 沟道迁移率 载流子输运 等效氧化层厚度
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Effect of Er ion implantation on the physical and electrical properties of TiN/HfO_2 gate stacks on Si substrate 被引量:1
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作者 ZHAO Mei LIANG RenRong +1 位作者 WANG Jing XU Jun 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第7期1384-1388,共5页
In this paper, we report the fabrication, electrical and physical characteristics of TiN/HfO2/Si MOS capacitors with erbium (Er) ion implantation. It is demonstrated that the fiat band voltage can be reduced by 0.4 ... In this paper, we report the fabrication, electrical and physical characteristics of TiN/HfO2/Si MOS capacitors with erbium (Er) ion implantation. It is demonstrated that the fiat band voltage can be reduced by 0.4 V due to the formation of Er oxide. Moreover, it is observed that the equivalent oxide thickness is thinned down by 0.5 nm because the thickness of interfacial layer is significantly reduced, which is thought to be attributed to the strong binding capability of the implanted Er atoms with oxygen atoms. In addition, cross-sectional transmission electron microscopy experiment shows that the HfO2 layer with Er ion implantation is still amorphous after annealing at a high temperature. This Er ion implantation technique has the potential to be implemented as a band edge metal gate solution for NMOS without a capping layer, and may also satisfy the demand of the EOT reduction in 32 nm technology node. 展开更多
关键词 erbium ion implantation high-k/metal-gate equivalent oxide thickness fiat band voltage interfacial layer crystallization
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Is quantum capacitance in graphene a potential hurdle for device scaling?
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作者 Jaeho Lee Hyun-Jong Chung +6 位作者 David H. Seo Jaehong Lee Hyungcheol Shin Sunae Seo Seongjun Park Sungwoo Hwang Kinam Kim 《Nano Research》 SCIE EI CAS CSCD 2014年第4期453-461,共9页
Transistor size is constantly being reduced to improve performance as well as power consumption. For the channel length to be reduced, the corresponding gate dielectric thickness should also be reduced. Unfortunately,... Transistor size is constantly being reduced to improve performance as well as power consumption. For the channel length to be reduced, the corresponding gate dielectric thickness should also be reduced. Unfortunately, graphene devices are more complicated due to an extra capacitance called quantum capacitance (CQ) which limits the effective gate dielectric reduction. In this work, we analyzed the effect of CQ on device-scaling issues by extracting it from scaling of the channel length of devices. In contrast to previous reports for metal-insulator- metal structures, a practical device structure was used in conjunction with direct radio-frequency field-effect transistor measurements to describe the graphene channels. In order to precisely extract device parameters, we reassessed the equivalent circuit, and concluded that the on-state model should in fact be used. By careful consideration of the underlap region, our device modeling was shown to be in good agreement with the experimental data. CQ contributions to equivalent oxide thickness were analyzed in detail for varying impurity concentrations in graphene. Finally, we were able to demonstrate that despite contributions from CQ, graphene's high mobility and low-voltage operation allows for ~raphene channels suitable for next generation transistors. 展开更多
关键词 GRAPHENE equivalent circuit quantum capacitance intrinsic delay
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