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2013 13th International Workshop on Junction Technology (IWJT)最新文献

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A low temperature Ohmic contact process for n-type Ge substrates n型Ge衬底的低温欧姆接触工艺
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644500
K. Kakushima, R. Yoshihara, K. Tsutsui, H. Iwai
With continuous demands for high performance and low power consumption CMOS devices, high mobility channel materials have been investigated for future end-of-roadmap electronic devices [1]. Among high mobility semiconductors, Ge channel have been focused as a strong candidate for both n- and p-type channel devices owing to high electron and hole mobility. To benefit the high channel mobility, low resistivity Ohmic contacts are essential for source and drain regions [2]. Commonly, an intuitive approach to achieve low Ohmic contact is to adopt heavily doped source and drain junctions, so as to increase the tunneling probability at metal/semiconductor interfaces. However, doping for Ge substrate suffer from poor solubility of dopants, large diffusion coefficient, incomplete activation of dopants [3]. Also, a strong Fermi-level pinning near the valence band of Ge results in large Schottky barrier height for electrons, which eventually leads to high contact resistance for n-type Ge channel [4]. This work presents a novel approach to obtain Ohmic characteristics with low temperature process on n-type Ge substrate without ion implantation.
随着对高性能低功耗CMOS器件的不断需求,高迁移率通道材料已被研究用于未来的路线图末端电子器件[1]。在高迁移率半导体中,由于具有较高的电子和空穴迁移率,Ge沟道已成为n型和p型沟道器件的有力候选。为了提高通道迁移率,源极和漏极区域的低电阻率欧姆接触是必不可少的[2]。通常,实现低欧姆接触的一种直观方法是采用高掺杂的源极和漏极结,以增加金属/半导体界面处的隧穿概率。然而,Ge衬底掺杂存在掺杂剂溶解度差、扩散系数大、掺杂剂活化不完全等问题[3]。此外,Ge价带附近的强费米能级钉住导致电子的高肖特基势垒高度,最终导致n型Ge通道的高接触电阻[4]。本文提出了一种在不注入离子的情况下,利用低温工艺在n型锗衬底上获得欧姆特性的新方法。
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引用次数: 3
Future micro/nano-electronics: Towards full 3D and zero variability 未来微/纳米电子学:走向全3D和零可变性
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644491
S. Deleonibus, F. Andrieu, P. Batude, X. Jehl, F. Martin, F. Milési, S. Morvan, F. Nemouchi, M. Sanquer, M. Vinet
Nanoelectronics will have to face major challenges in the next decades in order to proceed with increasing progress to the sub 10 nm nodes level and face the challenge to approach zero variability. The main requirements will be to reduce leakage currents and reduce access resistances at the same time in order to fully exploit 3D integration at the device, elementary function, chip and system. New progress laws combined to the scaling down of CMOS based technology will emerge to enable new paths to Functional Diversification. New materials and disruptive architectures, mixing logic and memories, Heterogeneous Integration, introducing 3D schemes at the Front End and Back End levels, will come into play to make it possible.
纳米电子学将在未来几十年面临重大挑战,以便继续向10纳米以下节点水平发展,并面临接近零可变性的挑战。主要的要求将是减少漏电流,同时减少接入电阻,以便在器件、基本功能、芯片和系统上充分利用3D集成。新的发展规律与CMOS技术的缩小相结合,将为功能多样化提供新的途径。新材料和颠覆性架构、混合逻辑和存储器、异构集成、在前端和后端级别引入3D方案,将发挥作用,使其成为可能。
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引用次数: 4
Microwave and RTA annealing of phos-doped, strained Si(100) and (110) implanted with molecular Carbon ions 微波和RTA退火的phop掺杂,应变Si(100)和(110)注入分子碳离子
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644511
M. Current, Yao-Jen Lee, Yu-Lun Lu, Ta-Chun Cho, T. Chao, H. Onoda, K. Sekar, N. Tokoro
Effects of microwave (MWA) at ≈500 C and rapid-thermal annealing at 600 to 1000 C are compared for phosphorous-doped, strained Si(100) and (110) implanted with molecular Carbon (C7H7) ions. Substitutional Carbon levels at 1.44% were achieved for P-doped, C7 implanted strained nMOS S/D type junctions with MWA.
比较了在≈500℃下微波(MWA)和600 ~ 1000℃下快速退火对掺杂磷的应变Si(100)和注入分子碳(C7H7)离子的Si(110)的影响。p掺杂、C7植入的MWA应变nMOS S/D型结的取代碳含量达到1.44%。
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引用次数: 1
Advanced power semiconductor technologies for efficient energy conversion 先进的功率半导体技术,实现高效的能量转换
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644505
G. Majumdar
Summary form only given. The role of power electronics and power devices in addressing the challenges in power and energy conversions and storage have continuously been very important and have been given wide attention also due to the fact that energy issues arising from climate change has risen to be a crucial global issue. In power electronic applications, the power density factor related to system designs has improved remarkably in the past two decades. The main contributions in this growth have come from timely development of newer power modules achieved through multi-dimensional major breakthroughs in IGBT and other power chip technologies, packaging structures and functionality integration concepts. Driven by various application needs in the past decades, various generations of power modules have evolved so far and have been widely applied in different power electronics equipment covering industrial motor controls, house-hold appliances, railway traction automotive power-train electronics, windmill and solar power generation systems etc. Today, power devices have become an extremely important component group for its role to sustain growth of power electronics and, thus, to contribute effectively in the current global effort to curb climate change. Under such backgrounds, this presentation is prepared to explain various state-of-the-art power device technologies focusing on IGBT modules and IPMs. It will also include highlights of future technological trends in such fields including prospects of SiC devices. Fig. 1 and 2 provide a summary of the presentation.
只提供摘要形式。电力电子和电力设备在解决电力和能源转换和存储方面的挑战方面的作用一直非常重要,并且由于气候变化引起的能源问题已经上升为一个至关重要的全球问题,因此受到了广泛的关注。在电力电子应用中,与系统设计相关的功率密度因子在过去二十年中有了显著的提高。这一增长的主要贡献来自于及时开发新的功率模块,通过在IGBT和其他功率芯片技术、封装结构和功能集成概念方面的多维重大突破来实现。几十年来,在各种应用需求的推动下,各代电源模块不断发展,已广泛应用于工业电机控制、家用电器、铁路牵引汽车动力系统电子、风车和太阳能发电系统等不同的电力电子设备中。今天,电力设备已经成为一个极其重要的组件组,因为它的作用是维持电力电子的增长,从而有效地为当前全球遏制气候变化的努力做出贡献。在这样的背景下,本报告准备解释各种最先进的功率器件技术,重点是IGBT模块和ipm。它还将包括这些领域未来技术趋势的亮点,包括SiC器件的前景。图1和图2提供了演示的摘要。
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引用次数: 2
Formation of Ge-on-Insulator Structures on Si platform by SiGe-mixing-triggered rapid-melting growth using RTA technique 利用RTA技术在硅平台上通过硅混合触发的快速熔化生长形成绝缘子上的锗结构
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644498
I. Mizushima, T. Sadoh, M. Miyao
Single-crystal Ge layers on insulating films (GOI) are desired to achieve advanced 3-dimensional large-scale integrated circuits and high-performance thin-film transistors. Rapid-melting Ge growth seeded from Si substrates, which utilizes rapid thermal annealing (RTA) technique with narrow Ge stripes on insulator, achieves chip-scale (~cm length) GOI structures with (100), (110), and (111) orientations. Profile of Si in Ge stripe is robustly controlled by sample structures (stripe length) and process conditions (cooling rate).
为了实现先进的三维大规模集成电路和高性能薄膜晶体管,需要在绝缘薄膜(GOI)上建立单晶锗层。在Si衬底上快速熔炼Ge生长,利用绝缘体上窄Ge条纹的快速热退火(RTA)技术,实现了(100)、(110)和(111)取向的芯片级(~cm) GOI结构。硅锗条的形状受样品结构(条长)和工艺条件(冷却速率)的控制。
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引用次数: 0
Strain-induced I-V characteristics modulation of p-n junctions and MOS capacitors in Si CMOS devices Si CMOS器件中p-n结和MOS电容的应变诱导I-V特性调制
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644514
Yi Zhao, Wangran Wu, Jiabao Sun, Yi Shi
In this paper, we review the recent progresses about the effect of the uniaxial tensile strain on the electrical properties of the Si p-n junctions and MOS capacitors. We found that the uniaxial tensile stress could increase the junction current in the large-forward-bias region significantly. However, only a slight current increase has been observed in the diffusion-current-dominant region. In nMOSFETs the uniaxial tensile strain could enhance Isub significantly, while decreasing Ig slightly. Furthermore, in pMOSFETs, the uniaxial tensile strain could enhance both Ig and Isub. All these results have been explained by taking the strain induced subband structure modulation, current components variation and the piezoresistance effect into consideration.
本文综述了单轴拉伸应变对Si - p-n结和MOS电容器电性能影响的最新研究进展。我们发现单轴拉伸应力可以显著增加大正向偏置区域的结电流。然而,在扩散电流占主导的区域,只观察到轻微的电流增加。在nmosfet中,单轴拉伸应变可以显著提高Isub,而略微降低Ig。此外,在pmosfet中,单轴拉伸应变可以提高Ig和Isub。所有这些结果都可以通过考虑应变引起的子带结构调制、电流分量变化和压阻效应来解释。
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引用次数: 0
Metal gate work function modulation by ion implantation for multiple threshold voltage FinFET devices 离子注入调制多阈值电压FinFET器件的金属栅极功函数
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644516
Keping Han, P. Hsu, Matthew Beach, T. Henry, N. Yoshida, A. Brand
FinFET has emerged as a device structure to enable the device scaling at and beyond the 22nm technology node due to increasingly stringent demands for maximum device speed, lower leakage current and control of random dopant fluctuation effects. High-k dielectric (Hik)/metal gate (MG) technology makes it feasible to obtain improved Effective Oxide Thickness (EOT) scaling and reduced leakage. Replacement metal gate (RMG) flows have been used for high performance logic volume production at and beyond 45nm node [1]. Precise threshold voltage (Vt) control and multiple Vt are required for FinFET device architectures for future devices. This paper proposes an ion implantation approach for modulating metal gate work function for both n-metal and p-metal gate used in a HiK last and replacement gate process. This approach offers simplified integration flow where no additional mask is needed and resist mask can be used. The effective work function (eWF) was measured along with the EOT and Gate Leakage (Jg). Stress Induced Leakage Current (SILC) method was used for testing HiK stack reliability. The results showed up to 200mV eWF modulation by ion implantation with fine control and without EOT and Jg degradation. The effect of implant species and dose on the eWF was studied in this paper. SIMS analysis of HKMG stack on the blanket wafer was used to determine the dopant distribution and explore the possible mechanism for metal gate work function modulation by ion implantation.
由于对最大器件速度、更低泄漏电流和控制随机掺杂剂波动效应的要求越来越严格,FinFET作为一种器件结构已经出现,可以实现器件在22nm技术节点及以上的缩放。高k介电介质(Hik)/金属栅极(MG)技术使得获得提高的有效氧化厚度(EOT)结垢和减少泄漏成为可能。替代金属栅极(RMG)流已用于45纳米及以上节点的高性能逻辑量产[1]。未来器件的FinFET器件架构需要精确的阈值电压(Vt)控制和多个Vt。本文提出了一种离子注入方法,用于调制HiK末栅和替换栅工艺中n-金属和p-金属栅极的金属栅极功函数。这种方法提供了简化的集成流程,不需要额外的掩码,并且可以使用抗掩码。测量了有效功函数(eWF)、EOT和栅漏(Jg)。采用应力感应泄漏电流(SILC)法测试HiK堆的可靠性。结果表明,离子注入可调制高达200mV的eWF,具有良好的控制,且无EOT和Jg降解。本文研究了植入物种类和剂量对eWF的影响。采用SIMS分析方法分析了包层晶圆上HKMG层的掺杂分布,探讨了离子注入对金属栅功函数调制的可能机制。
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引用次数: 4
Formation of arsenic segregated Ytterbium and Nickel silicide using microwave annealing 微波退火制备砷分离的硅化钇镍
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644499
Ming-Kun Huang, Wen-Fa Wu, C. Shih, Shen-Li Chen
This work investigates the formation of arsenic segregated Ytterbium and Nickel silicide using low-temperature microwave annealing. Two types of dopant segregation approaches, implant-before-silicidation and implantation-through-metal, are performed to examine the electrical properties of the microwave annealed silicide. Results of current-voltage curves and dopant distribution profiles are compared with those using rapid thermal annealing.
本文研究了低温微波退火制备砷分离硅化钇和硅化镍的过程。采用两种类型的掺杂剂偏析方法,即硅化前注入和通过金属注入,来检测微波退火硅化物的电学性质。比较了快速热退火的电流-电压曲线和掺杂物分布曲线。
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引用次数: 0
Formation of ultra-shallow junctions with pre-amorphization implant and microwave annealing 预非晶化植入和微波退火形成超浅结
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644513
P. Xu, Xiangbiao Zhou, Na Zhao, Dan Zhao, Dongping Wu
Microwave annealing was used for the activation of both n-and p-type ultra-shallow junctions, formed by pre-amorphization Ge implant followed by low energy n-and p-type dopant implant. The regrowth of a-Si layer was completed after 50 seconds microwave annealing. However, the EOR defects were still clearly visible even after 1200 seconds annealing. The maximum fraction of hall electrical activation was 29.1% for BF2-implanted samples and 79.4% for As-implanted ones. Dopant deactivation occurred when the annealing time was longer than 100 seconds.
采用微波退火的方法激活了n型和p型超浅结,这些超浅结是由预非晶化的Ge掺杂形成的,然后是低能的n型和p型掺杂。微波退火50秒后,a-Si层完成再生。然而,即使在1200秒退火后,EOR缺陷仍然清晰可见。注入bf2的样品霍尔电激活最大比例为29.1%,注入as的样品为79.4%。当退火时间大于100秒时,掺杂剂失活。
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引用次数: 1
Photoluminescence and Raman characterization of excessive plasma etch damage of silicon 硅过度等离子体腐蚀损伤的光致发光和拉曼表征
Pub Date : 2013-06-06 DOI: 10.1109/IWJT.2013.6644501
S. Jian, C. Jeng, Ting-Chun Wang, Chih-Mu Huang, Ying-Lang Wang, H. Nishigaki, N. Hasuike, H. Harima, W. Yoo
Plasma processes have long been used in various stages of semiconductor device fabrication. Plasma enhanced chemical vapor deposition (PECVD) has been widely used as a low temperature silicon dioxide film deposition method in the semiconductor industry. [1,2] Various modes of plasma etching techniques also have been playing major roles in the silicon industry. Physical vapor deposition (PVD or sputtering), ion implantation, plasma ashing and plasma doping (PD) are a few examples of widely adapted plasma process techniques.
等离子体工艺长期以来一直应用于半导体器件制造的各个阶段。等离子体增强化学气相沉积(PECVD)作为一种低温二氧化硅薄膜沉积方法在半导体工业中得到了广泛的应用。[1,2]各种模式的等离子体蚀刻技术也在硅工业中发挥着重要作用。物理气相沉积(PVD或溅射),离子注入,等离子体灰化和等离子体掺杂(PD)是广泛应用的等离子体工艺技术的几个例子。
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引用次数: 0
期刊
2013 13th International Workshop on Junction Technology (IWJT)
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