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2010 International Workshop on Junction Technology Extended Abstracts最新文献

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Effective approaches to prevent ambient contaminations impact on the Cobalt Salicide process 防止环境污染对盐化钴工艺影响的有效方法
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474987
Kun Gui, Paul-Chang Lin, Dong Ouyang, Jiwei Zhang, C. Xing
Co-Silicide provides lower contact resistance and better device performance, which is widely used in 0.18um and below technology. Typical Co-Salicide process is composed of Co and Ti/TiN capping layer deposition and two RTA (Rapid Thermal Anneal) process steps. The quality of silicide formation will directly influence its device performance. With the character of Co thin film, which is more sensitive to O2, H2O and other acid contaminations, the micro-contamination control is very critical during Co-silicide formation process steps. In this paper, the Co-Silicide poor formation mechanism is studied and some effective improvement methods are proposed.
co -硅化物具有更低的接触电阻和更好的器件性能,广泛应用于0.18um及以下工艺。典型的Co- salicide工艺由Co和Ti/TiN盖层沉积和两个RTA(快速热退火)工艺步骤组成。硅化物形成的质量将直接影响其器件的性能。由于Co薄膜对O2、H2O等酸性污染更为敏感,因此在Co硅化物形成过程中,微污染控制至关重要。本文对co -硅化物的不良形成机理进行了研究,并提出了一些有效的改善方法。
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引用次数: 0
Suppression of phosphorus diffusion using cluster Carbon co-implantation 簇碳共注入抑制磷扩散
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474979
T. Nagayama, H. Onoda, M. Tanjyo, N. Hamamoto, S. Umisedo, Y. Koga, N. Maehara, Y. Kawamura, Y. Nakashima, Y. Hashino, M. Hashimoto, H. Yoshimi, S. Sezaki, N. Nagai
Phosphorus transient enhanced diffusion (TED) is caused by interstitial diffusion mechanism. It is important for the efficient suppression of phosphorus diffusion that some carbons could be located on lattice point in the initial stage of re-growth during annealing and trap interstitial Silicon. Carbon co-implantation after Germanium, pre-amorphization implantation (PAI) is applied for the applications of n+/p junction formation and the effects of Carbon co-implantation are reported. In our experiments it is shown that suppression of Phosphorus diffusion could be achieved with conventional rapid thermal annealing (RTA) by using cluster Carbon (C16Hx+, C7Hx+) co-implantation for the self-amrphization. Our experimental data suggests that cluster carbon co-implantation enable to suppress phosphorus diffusion without germanium pre-amorphous implantation. In this paper the characteristics of cluster Carbon co-implantation after RTA are introduced from experimental results which were obtained by secondary ion mass spectroscopy (SIMS) measurement, transmission electron microscopy (TEM) and sheet-resistance measurement.
磷的瞬态增强扩散是由间隙扩散机制引起的。在退火过程中,一些碳可以定位在再生长初期的晶格点上,并捕获间隙硅,这对有效抑制磷的扩散具有重要意义。采用预非晶化注入(PAI)后碳共注入的方法制备n+/p结,并报道了碳共注入的效果。实验结果表明,利用簇碳(C16Hx+, C7Hx+)共注入自非晶化,采用传统的快速热退火(RTA)方法可以抑制磷的扩散。我们的实验数据表明,簇碳共注入可以抑制磷的扩散,而不需要锗的预非晶注入。本文从二次离子质谱(SIMS)、透射电子显微镜(TEM)和薄片电阻测量的实验结果介绍了RTA后簇碳共注入的特性。
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引用次数: 1
Dual beam laser spike annealing technology 双光束激光脉冲退火技术
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474998
Y. Wang, Shaoyin Chen, M. Shen, Xiaoru Wang, Senquan Zhou, J. Hebb, D. Owen
A new dual-beam laser spike annealing (DB-LSA) technology is developed to expand the application space of non-melt laser annealing. In the standard LSA configuration, a single narrow laser beam is used to heat the wafer surface from substrate temperature to the peak annealing temperature close to silicon melt. In DB-LSA, a second wide laser beam is incorporated to preheat the wafer. The dual beam system offers flexibility in tuning the temperature and stress profiles. It also enables lower substrate temperature that is compatible with the middle of line applications. In this paper, we will discuss the new capabilities of DB-LSA. Implications on Rs-Xj scaling, defect curing and silicide formations will also be discussed.
为了扩大非熔体激光退火的应用空间,提出了一种新的双光束激光脉冲退火技术。在标准的LSA配置中,使用单个窄激光束将晶圆表面从衬底温度加热到接近硅熔体的峰值退火温度。在DB-LSA中,加入第二束宽激光束来预热晶圆片。双梁系统在调节温度和应力剖面方面提供了灵活性。它还可以降低衬底温度,与中线应用兼容。在本文中,我们将讨论DB-LSA的新功能。对Rs-Xj结垢、缺陷固化和硅化物形成的影响也将进行讨论。
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引用次数: 8
Causes of asymmetry in graphene transfer characteristics 石墨烯转移特性不对称的原因
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474966
Shouheng Xu, Qing Zhang
Back-gated graphene field-effect transistor (FET) with Carrier mobility values over 8000 cm2/Vs is fabricated. Contact resistances and carrier motilities are extracted from an established model. We investigate the asymmetry in its transfer characteristics and attribute it to the differences in contact resistances modulated by the back gate voltages and distinct mobility of electrons and holes. The experimental results are analyzed quantitatively and the mechanisms are discussed.
制备了载流子迁移率超过8000 cm2/Vs的背门控石墨烯场效应晶体管(FET)。从已建立的模型中提取接触电阻和载流子运动。我们研究了其转移特性的不对称性,并将其归因于由后门电压调制的接触电阻的差异以及电子和空穴的不同迁移率。对实验结果进行了定量分析,并讨论了机理。
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引用次数: 8
Substrate doping induced hole barrier lowering in PtSi/n-Si Schottky diode and its implication to PtSi source/drain SBFETs 衬底掺杂诱导PtSi/n-Si肖特基二极管空穴势垒降低及其对PtSi源极/漏极sbfet的影响
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474993
Hongyu Yu
In this paper, Schottky barrier height (SBH) lowering of Pt silicide/n-Si diodes is demonstrated empirically and we study its implications to Schottky-barrier (SB) source/drain p-FETs. We show that the hole SBH can be lowered through an image-force mechanism by increasing the n-Si substrate doping, which can lead to a substantial gain of the drive current in the long-channel bulk p-SBFETs. Numerical simulations show that the channel doping concentration is also critical for short-channel n- & p- SOI SBFETs performance.
本文实证地证明了硅化铂/n-Si二极管的肖特基势垒高度(SBH)降低,并研究了其对肖特基势垒(SB)源极/漏极p场效应管的影响。我们表明,通过增加n-Si衬底掺杂,可以通过像力机制降低空穴SBH,这可以导致长沟道体p- sbet中的驱动电流大幅增加。数值模拟表明,沟道掺杂浓度对短沟道n-和p- SOI sbfet的性能也至关重要。
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引用次数: 0
MD simulation of small boron cluster implantation 小硼簇植入的MD模拟
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474974
T. Aoki, T. Seki, J. Matsuo
Molecular dynamics (MD) simulations of small boron clusters impacting on silicon (100) surface were carried out. The impacts of B10, B18 and B36 accelerated with 2keV, 3.6keV and 7.6keV (200eV per boron atom) showed characteristic irradiation effect, heavy mixing or amourphosization, and crater formation at the impact point. The MD results also suggested, when the incident energy per atom is several hundreds eV/atom and is kept constant for various cluster sizes, the depth profiles of implanted boron atoms and damage increases as the cluster size.
采用分子动力学方法模拟了小硼团簇撞击硅(100)表面的过程。B10、B18和B36分别以2keV、3.6keV和7.6keV(每个硼原子200eV)加速撞击,表现出特有的辐照效应、重混合或无磷化,并在撞击点形成弹坑。MD结果还表明,当每个原子的入射能量为数百eV/原子时,并且保持不同簇大小的入射能量不变,硼原子的深度分布和损伤随簇大小的增加而增加。
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引用次数: 0
Technology options for 22nm and beyond 22nm及以上的技术选项
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5475000
K. Kuhn, Mark Y. Liu, H. Kennel
This paper explores the challenges facing the 22nm process generation and beyond. CMOS transistor architectures such as ultra-thin body, FinFET, and nanowire will be compared and contrasted. Mobility enhancements such as channel stress, alternative orientations, and exotic materials will be explored. Resistance challenges will be reviewed in relation to key process techniques such as silicidation, implantation and anneal. Capacitance challenges with traditional and new architectures will be discussed in light of new materials and processing techniques. The impact of new transistor architectures and enhanced channel materials on traditional junction engineering solutions will be summarized.
本文探讨了22nm制程及其以后所面临的挑战。将比较和对比超薄体、FinFET和纳米线等CMOS晶体管架构。流动性增强,如通道应力,替代取向,和外来材料将被探索。电阻挑战将涉及关键工艺技术,如硅化,注入和退火。我们将根据新材料和加工技术讨论传统和新架构的电容挑战。总结了新型晶体管结构和增强通道材料对传统结工程解决方案的影响。
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引用次数: 39
Depth profiling of chemical bonding states of impurity atoms and their correlation with electrical activity in Si shallow junctions 硅浅结中杂质原子化学键态的深度分布及其与电活动的关系
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474909
K. Tsutsui, Norifumi Hoshino, Y. Nakagawa, Masaoki Tanaka, H. Nohira, K. Kakushima, P. Ahemt, Y. Sasaki, B. Mizuno, T. Hattori, H. Iwai
Chemical bonding states of doped impurities such as B, As, P and Sb in Si were analyzed by soft X-ray photoelectron spectroscopy (SXPES). A step-by-step shallow etching and Hall effect measurements were combined with the SXPES to investigate correlation between chemical bonding state and electrical activation, and to clarify depth profiles of concentration of activated and deactivated impurities in shallow junctions. The study of B doped layer revealed that one chemical bonding state is assined to activated B and the other two states are correlated with deactivated B, which probably form B clusters. On the other hand, two different chemical bonding states were detected for each donor type impurity (As, P and Sb), however, these two states could not be necessarily correlated with the electrically activated and deactivated atoms.
用软x射线光电子能谱(SXPES)分析了Si中掺杂杂质B、as、P和Sb的化学键态。一步一步的浅层蚀刻和霍尔效应测量与SXPES相结合,研究了化学键状态与电激活之间的相关性,并阐明了浅层结中活化和失活杂质浓度的深度分布。对B掺杂层的研究表明,活化的B有一个化学键态,而失活的B有另外两个化学键态,可能形成B簇。另一方面,每种给体类型杂质(As, P和Sb)都检测到两种不同的化学键态,但这两种状态不一定与电激活和失活原子相关。
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引用次数: 0
Carbon incorporation into substitutional silicon site by carbon cryo ion implantation and metastable recrystallization annealing as stress technique in n-metal-oxide-semiconductor field-effect transistor 用碳冷离子注入和亚稳再结晶退火作为应力技术在n-金属氧化物半导体场效应晶体管中将碳掺入取代硅位
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5475009
H. Itokawa, K. Miyano, Y. Oshiki, H. Onoda, M. Nishigoori, I. Mizushima, K. Suguro
Since the lattice constant of silicon-carbon (Si:C) is smaller than that of Si, Si:C embedded in the source and drain (e-Si:C S/D) can induce tensile stress in the channel and improve the electron mobility of n-metal-oxide-semiconductor field-effect transistors (nMOSFETs). In this research, C ion cryo implantation and a metastable recrystallization schemes employed to achieve strained Si:C layers with a high substitutionally incorporated carbon concentration ([C]sub) at a high ratio of substitution, and a high doping activation were studied. we proposed the C cryo implantation for reduced implantation damage, the fast recrystallization by nonmelt laser annealing combined with solid phase epitaxy (SPE) annealing that promote Si regrowth in a high-C-concentration region, and the co-incorporation of phosphorus (P). These processes promoted markedly the recrystallization of C densely incorporated in an amorphous Si layer and realized e-Si:C S/D with high-crystallinity of strained Si:C layer while maintaining a high [C]sub at a high ratio of substitution with a high doping activation.
由于硅碳(Si:C)晶格常数小于Si晶格常数,因此嵌入源极和漏极(e-Si:C S/D)的Si:C可以在沟道中诱导拉伸应力,提高n-金属氧化物半导体场效应晶体管(nmosfet)的电子迁移率。在本研究中,采用C离子冷注入和亚稳再结晶方案,研究了在高取代比下获得具有高取代碳掺入浓度([C]sub)和高掺杂活化的应变Si:C层。我们提出了C低温注入可以减少注入损伤,非熔体激光退火结合固相外延(SPE)退火可以促进Si在高C浓度区域的再结晶,这些过程显著促进了C密集结合在非晶Si层中的再结晶,实现了应变Si:C层具有高结晶度的e-Si:C S/D,同时保持了高取代比和高掺杂活化的高[C]sub。
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引用次数: 1
Advanced Flash Lamp Annealing technology for 22nm and further device 先进的闪光灯退火技术,适用于22nm及更远的器件
Pub Date : 2010-05-10 DOI: 10.1109/IWJT.2010.5474999
H. Kiyama, S. Kato, T. Aoyama, T. Onizawa, K. Ikeda, H. Kondo, K. Hashimoto, H. Murakawa, Toru Kuroiwa
Idea of a very short time annealing technology has evaluated in 1980s. Engineers tried to use Flash lamp, laser or some other lamps [1]. In 1990s, W-halogen lamp annealing replaced furnace annealing in activation and silicidation process. Thermal budget has reduced from minutes to seconds. Eager for Milli-second Annealing (MSA) really came out in 2000s. Since dopant diffusion and an activation ratio have been considered to be more critical obstacle in scaled down microstructure devices, FLA activation technology came into spotlight again [2–9]. A 65nm device was a first product which used Flash Lamp Annealing (FLA) in manufacturing. Today, milli-second process has become an indispensable method in device manufacturing. But device generation keeps proceeding 45nm, 32nm and so on. Furthermore, a new material like high-k/metal is selected as a latest device material. Difficulty in MSA for 32 and 22 generation devices is reported recently.
短时间退火技术的思想在20世纪80年代得到了评价。工程师们尝试使用闪光灯、激光或其他一些灯[1]。20世纪90年代,钨卤素灯退火取代了炉退火在活化和硅化工艺中的应用。热收支从几分钟缩短到几秒钟。渴望毫秒退火(Eager for毫秒退火,MSA)在2000年才真正出现。由于掺杂剂扩散和激活比被认为是微结构器件缩小的关键障碍,FLA激活技术再次受到关注[2-9]。65nm器件是第一个采用闪光灯退火技术(FLA)制造的器件。如今,毫秒制程已经成为器件制造中不可或缺的一种方法。但器件的生产一直在45nm、32nm等工艺上进行。此外,还选择了高k/金属等新材料作为最新的器件材料。最近报道了32代和22代器件的MSA困难。
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引用次数: 5
期刊
2010 International Workshop on Junction Technology Extended Abstracts
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