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2006 14th IEEE International Conference on Advanced Thermal Processing of Semiconductors最新文献

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Impact of NI Layer Thickness and Anneal Time on Nickel Silicide Formation by Rapid Thermal Processing NI层厚度和退火时间对快速热处理硅化镍形成的影响
T. Huelsmann, J. Niess, W. Lerch, O. Fursenko, D. Bolze
The effects of different initial Ni layer thickness and various anneal times during the nickel silicidation process have been investigated as a function of rapid thermal annealing temperature between 200 and 800degC. By means of electrical and optical measurements the Ni silicide phase transformations are explained. Spectroscopic ellipsometry has been used to measure Ni and Ni silicide thickness. An oxide on the Ni layer was found to be generated, if the time between Ni deposition and annealing is not short enough. Also a method to monitor the Ni silicidation process on RTP systems was introduced
研究了镍硅化过程中不同初始Ni层厚度和不同退火次数对快速退火温度(200 ~ 800℃)的影响。通过电学和光学测量对硅化镍相变进行了解释。利用椭偏光谱法测量了镍和硅化镍的厚度。如果Ni沉积和退火之间的时间不够短,则会在Ni层上产生氧化物。介绍了一种监测RTP系统Ni硅化过程的方法
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引用次数: 1
NBTI Immune First Plasma Nitridation SiON with Multiple Single-Wafer Tools for 45nm node Gate Dielectrics 45纳米节点栅极电介质的NBTI免疫等离子体氮化
M. Tanaka, S. Koyama, E. Hasegawa, C. Olsen, S. Shishiguchi, M. Hane
Nitrogen-rich and thin SiON gate dielectrics process using first plasma nitridation approach has been examined for 45nm-node CMOS application. This new process provides Tinv 1.8 nm with almost no degradation of the gm and no shift of Vth, and especially exhibits the higher immunity of the negative bias temperature instability (NBTI) even though the interfacial nitrogen concentration was observed to be higher than that of the conventional SiON process
研究了45纳米节点CMOS富氮薄硅栅电介质的首次等离子体氮化工艺。该工艺制备的Tinv 1.8 nm几乎不存在gm的降解和Vth的移位,特别是在界面氮浓度高于传统工艺的情况下,具有更高的抗负偏置温度不稳定性(NBTI)的能力
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引用次数: 1
Laser Thermal Annealing for Power Field Effect Transistor by using Deep Melt Activation 利用深熔体激活法对功率场效应晶体管进行激光热退火
T. Gutt, H. Schulze, T. Rupp, J. Venturini
For chips with vertical flow of electrical current, an ohmic contact and/or emitter on the backside of the wafer are required. The formation of this electrical contact can be done using a laser annealing method in overlapping mode. Test on bare wafers and on productive chips were carried out using an excimer laser (lambda = 308 nm) with a laser energy density of more than 2 J/cm2 and a laser pulse duration of 180ns. Owing to the long pulse duration, deep melt activation with a molten zone with up to 400nm could be reached and an efficient emitter could be achieved
对于具有垂直电流流的芯片,需要在晶圆背面安装欧姆触点和/或发射器。这种电接触的形成可以用激光退火方法在重叠模式下完成。使用准分子激光器(λ = 308 nm),激光能量密度大于2 J/cm2,激光脉冲持续时间为180ns,在裸晶片和生产芯片上进行了测试。由于脉冲持续时间长,可以实现深度熔体激活,熔体区域可达400nm,并且可以实现高效的发射器
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引用次数: 9
Influence of the Atmosphere on Ultra - Thin Oxynitride Film for Precisely Controled Plasma Nitridation Process 气氛对精确控制等离子体氮化过程中超薄氮氧膜的影响
K. Saki, M. Tamaoki, T. Shimizu, S. Ito, S. Mori, A. Shimazaki, I. Mizushima, A. Yamamoto
Influence of the atmosphere on ultra-thin oxynitride film was investigated for the precisely controlled plasma nitridation process. Some organic contaminant adsorb on the wafer before plasma nitridation process in clean room atmosphere. The adsorbed organic contaminant reduces the efficiency of plasma nitridation and increases the electrical thickness. The TDDB characteristic of ultra-thin oxynitride film was degraded due to the adsorbed organic contaminant. On the other hand, nitrogen concentration decreases due to exposure to an atmosphere after plasma nitridation process. The drop of nitrogen concentration causes Vth shift and Vth variation in MOSFET. The atmosphere and waiting time for post nitridation anneal affect on the drop of nitrogen concentration. It was demonstrated that the suppression of organic contamination before plasma nitridation and the control of the waiting time and atmosphere before post nitridation are the most important factors for the precise control of ultra-thin oxynitride film
采用精密控制等离子体渗氮工艺,研究了气氛对超薄氮化氧膜的影响。在洁净室气氛中,等离子体氮化处理前,硅片上吸附了一些有机污染物。吸附的有机污染物降低了等离子体氮化的效率,增加了电层厚度。超薄氮氧膜的TDDB特性由于吸附了有机污染物而被降解。另一方面,由于等离子体氮化过程后暴露于大气中,氮浓度降低。氮浓度的下降引起MOSFET的Vth位移和Vth变化。氮化后退火的气氛和等待时间对氮浓度的下降有影响。结果表明,抑制等离子体氮化前的有机污染、控制后氮化前的等待时间和气氛是精确控制超薄氮化氧膜的最重要因素
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引用次数: 1
Kinetics of Shallow Junction Activation: Physical Mechanisms 浅结活化动力学:物理机制
H. Kennel, M. Giles, M. Diebel, P. Keys, J. Hwang, S. Govindaraju, M. Liu, A. Budrevich
Forming highly active shallow junctions is a key component enabling low external resistance and high transistor performance. Millisecond flash or scanning laser anneals can be used to contain diffusion and optimize activation, either directly by leveraging temperatures exceeding 1200C, or in combination with non-equilibrium processes such as amorphization plus solid phase epitaxy or liquid phase epitaxy. Diffusionless profiles can be obtained, but may not be optimal for devices. Consideration of deactivation physics is crucial to incorporation of any process leveraging superactive doping, since relaxation of doping is frequently very rapid, and may be crucially influenced by implant damage effects. Developing an understanding of dominant mechanisms is essential for the exploitation of millisecond or faster anneals to form superactive doping
形成高活性的浅结是实现低外部电阻和高晶体管性能的关键组件。毫秒闪光或扫描激光退火可用于控制扩散和优化活化,要么直接利用超过1200℃的温度,要么结合非平衡过程,如非晶化加固相外延或液相外延。可以获得无扩散轮廓,但对于器件可能不是最佳的。考虑失活物理对于纳入任何利用超活性掺杂的过程都是至关重要的,因为掺杂的松弛通常非常迅速,并且可能受到植入物损伤效应的关键影响。发展对主要机制的理解对于利用毫秒或更快的退火形成超活性掺杂至关重要
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引用次数: 9
Ni-Silicide/Si and SiGe(C) Contact Technology for ULSI Applications 用于ULSI应用的ni -硅化物/Si和SiGe(C)接触技术
O. Nakatsuka, S. Zaima, A. Sakai, M. Ogawa
We have investigated the crystalline and electrical properties of Ni silicide/Si and SiGeC contacts for ULSI applications. NiSi/Si contacts promises the contact resistivity as low as 10-8 Omegacm2 for both n+- and p+-Si. Degradation of the sheet resistance of NiSi layers critically depends on the annealing time particularly at temperatures ranging from 650degC to 750degC. The enlargement of the Si-exposed region concomitant with the NiSi agglomeration is a dominant factor responsible for the increase in sheet resistance and the activation energy of this process is estimated to be 2.8plusmn0.4 eV. Incorporation of Ge into Ni/Si systems is effective in raising the transformation temperature from NiSi to NiSi2. Incorporation of C into NiSi/Si system effectively suppresses the NiSi agglomeration. C introduction also causes the pile-up of B atoms at the NiSi/Si interface, which promises the reduction of the contact resistivity
我们研究了用于ULSI应用的硅化镍/Si和SiGeC触点的晶体和电学性能。NiSi/Si触点保证n+-和p+-Si的接触电阻率低至10-8 Omegacm2。NiSi层的片电阻退化主要取决于退火时间,特别是在650℃至750℃的温度范围内。硅暴露区扩大是导致硅片电阻增大的主要原因,该过程的活化能估计为2.8±0.4 eV。在Ni/Si体系中掺入Ge可以有效地提高NiSi到NiSi2的转变温度。在NiSi/Si体系中加入C可有效抑制NiSi团聚。C的引入还会导致B原子在NiSi/Si界面堆积,从而有望降低接触电阻率
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引用次数: 0
Ultra-shallow Junction Formed by Plasma Doping and Laser Annealing 等离子体掺杂与激光退火形成的超浅结
S. Heo, H. Hwang
We investigated ultra-shallow junction prepared by plasma doping (PLAD) and laser annealing (LA). Although PLAD is promising doping technology for the sub-45nm technology node due to the high dose rate at low energy, it has problems which is related with hydrogen or fluorine. The implanted hydrogen generally increases damage in the Si substrate. The fluorine also retards dopant activation and increases dopant deactivation during post-annealing step. Conventional one step annealing processes such as rapid thermal annealing (RTA) or excimer laser annealing (LA) are not effective method for high dopant activation. To minimize the effect of hydrogen or fluorine, we propose additional pre-annealing followed by conventional laser annealing. By employing low temperature pre-annealing, we can improve electrical characteristics such as low sheet resistance, high activation rates, shallow junction depth and reduced dopant deactivation. The improvement can be explained by reduced defect density and out-diffusion of fluorine or hydrogen which in turn enhances dopant activation during ELA
研究了等离子体掺杂(PLAD)和激光退火(LA)制备的超浅结。PLAD因其在低能量下的高剂量率是在sub-45nm技术节点上很有前途的掺杂技术,但存在与氢或氟相关的问题。注入的氢通常会增加硅衬底的损伤。在退火后的步骤中,氟还延缓了掺杂剂的活化并增加了掺杂剂的失活。传统的一步退火工艺,如快速热退火(RTA)或准分子激光退火(LA)都不是高掺杂激活的有效方法。为了尽量减少氢或氟的影响,我们建议在常规激光退火之后进行额外的预退火。通过采用低温预退火,我们可以改善电学特性,如低片电阻,高激活率,浅结深度和减少掺杂失活。这种改善可以通过降低缺陷密度和氟或氢的外扩散来解释,这反过来又增强了ELA过程中掺杂剂的活化
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引用次数: 1
Double-Pulsed Laser Annealing Technologies and Related Applications 双脉冲激光退火技术及其应用
T. Kudo
New applications of the double-pulsed laser annealing (DPLA) technologies were opened up in the coming-generation high-performance devices: insulated gate bipolar transistors (IGBTs) and low-temperature polycrystalline silicon thin-film transistors (LTPS-TFTs). The DPLA system was equipped with two solid-state lasers of a green wavelength as pulse laser sources. The line-beam irradiation was done in the same way as conventional excimer laser annealing (ELA) by making a sample stage scan at a constant speed while emitting the double-pulsed laser at 1kHz. The IGBTs demand deep PN junction in high electrical activation, while the LTPS-TFTs do high quality silicon thin films like a single crystal. The low-thermal budget annealing process enabled only the B- and P-implant layers within a depth of about 2mum to be activated without heating the whole wafer. The PN junction consisting of a B-implant layer and a P-implant layer reached more than 80% in activation ratios to adjust a delay time between double laser pulses. The advanced lateral crystal growth (ALCG) process enabled Si grains to be laterally and sequentially grown. The n-channel TFTs (L/W: 5mum/5mum) made of the ALCG-Si thin films reached a level of 600cm2/Vs in average mobility when the drain current flowed along the lateral-growth direction
双脉冲激光退火(DPLA)技术在新一代高性能器件:绝缘栅双极晶体管(igbt)和低温多晶硅薄膜晶体管(LTPS-TFTs)中开辟了新的应用。DPLA系统配备了两个绿色波长的固体激光器作为脉冲激光源。线束辐照的方式与传统准分子激光退火(ELA)相同,即以恒定速度进行样品级扫描,同时以1kHz发射双脉冲激光。igbt需要在高电激活下的深PN结,而ltps - tft则需要像单晶一样的高质量硅薄膜。低热收支退火工艺只激活了约2mum深度内的B-和p -植入层,而无需加热整个晶圆。由b -植入层和p -植入层组成的PN结激活比达到80%以上,可以调节双激光脉冲之间的延迟时间。先进的横向晶体生长(ALCG)工艺使Si晶粒能够横向有序生长。由ALCG-Si薄膜制成的n沟道tft (L/W: 5mum/5mum)在沿横向生长方向流动时,平均迁移率达到600cm2/Vs
{"title":"Double-Pulsed Laser Annealing Technologies and Related Applications","authors":"T. Kudo","doi":"10.1109/RTP.2006.367978","DOIUrl":"https://doi.org/10.1109/RTP.2006.367978","url":null,"abstract":"New applications of the double-pulsed laser annealing (DPLA) technologies were opened up in the coming-generation high-performance devices: insulated gate bipolar transistors (IGBTs) and low-temperature polycrystalline silicon thin-film transistors (LTPS-TFTs). The DPLA system was equipped with two solid-state lasers of a green wavelength as pulse laser sources. The line-beam irradiation was done in the same way as conventional excimer laser annealing (ELA) by making a sample stage scan at a constant speed while emitting the double-pulsed laser at 1kHz. The IGBTs demand deep PN junction in high electrical activation, while the LTPS-TFTs do high quality silicon thin films like a single crystal. The low-thermal budget annealing process enabled only the B- and P-implant layers within a depth of about 2mum to be activated without heating the whole wafer. The PN junction consisting of a B-implant layer and a P-implant layer reached more than 80% in activation ratios to adjust a delay time between double laser pulses. The advanced lateral crystal growth (ALCG) process enabled Si grains to be laterally and sequentially grown. The n-channel TFTs (L/W: 5mum/5mum) made of the ALCG-Si thin films reached a level of 600cm2/Vs in average mobility when the drain current flowed along the lateral-growth direction","PeriodicalId":114586,"journal":{"name":"2006 14th IEEE International Conference on Advanced Thermal Processing of Semiconductors","volume":"32 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123671205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Improvement of within Wafer Uniformity of Device Parameters by Gradient Temperature Control with Bell Jar Hot Wall RTP 用钟罩热壁RTP梯度温度控制改善晶圆内器件参数均匀性
KyungWon Lee, S. Kim, P. Frisella, B. Jacobs, G. Cai, R. Reece, N. Kwak, Chulyoung Ham, K. Joo, Dongho Lee, SangWook Park, Sungki Park
This paper presents a method to minimize cross-wafer threshold voltage variation, specifically radial variation, on device wafers using the inherent characteristics and repeatability of a bell-jar hot wall RTP system. The temperature uniformity of Axcelis' bell-jar hot wall RTP is controlled by a three-zone temperature gradient. It is possible to change the cross-wafer thermal uniformity from a flat or uniform distribution to either edge-hot, or edge-cold. The settings are characterized and optimized using sheet resistance monitors. It is demonstrated that by optimizing the power levels of the three-zone furnace, an optimized temperature gradient can be repeatedly formed and visualized by convex or concave sheet resistance maps. As results of the radial uniformity tuning, the RTP user can minimize the affect of process variations from other FEOL processes, such as etch or lithography as it is compensated by RTP process. This capability could enhance wafer yield below 80nm technology flash device through better control and uniformity of device parameters
本文提出了一种利用钟罩热壁RTP系统的固有特性和可重复性来最小化器件晶圆上的跨晶圆阈值电压变化,特别是径向变化的方法。Axcelis型钟罩热壁RTP的温度均匀性由三区温度梯度控制。可以将晶圆间的热均匀性从平坦或均匀分布改变为边热或边冷。使用薄片电阻监视器对设置进行表征和优化。结果表明,通过优化三区炉的功率水平,可以反复形成优化后的温度梯度,并通过凸或凹板电阻图进行可视化。作为径向均匀性调整的结果,RTP用户可以最大限度地减少其他FEOL工艺变化的影响,如蚀刻或光刻,因为它是由RTP工艺补偿的。这种能力可以通过更好的控制和均匀的器件参数来提高80nm以下工艺闪存器件的晶圆良率
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引用次数: 1
Growing Importance of Fundamental Understanding of the Source of Process Variations 对过程变化来源的基本理解日益增长的重要性
S. Sato
Statistical process control (SPC) has been widely practiced as a quality control method in the semiconductor industry. SPC is a system for monitoring, controlling, and improving a process through statistical analysis of monitored data. Control charts are widely used for process monitoring, but they are often misinterpreted. To improve process capability, the source of process variations must be properly identified from the control charts for proper feedback. Since the process tolerance is getting increasingly narrow, the importance of fundamental understanding of the source of process variations is an imperative. By eliminating or reducing process variation, a small improvement in process capability, can have a very significant business impact
统计过程控制(SPC)作为一种质量控制方法在半导体工业中得到了广泛的应用。SPC是一种通过对监测数据的统计分析来监测、控制和改进过程的系统。控制图被广泛用于过程监控,但它们经常被误解。为了提高过程能力,必须从控制图中正确识别过程变化的来源,以获得适当的反馈。由于过程容忍度越来越小,对过程变化来源的基本理解的重要性就变得势在必行。通过消除或减少过程变化,过程能力的一个小改进可以产生非常重要的业务影响
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引用次数: 5
期刊
2006 14th IEEE International Conference on Advanced Thermal Processing of Semiconductors
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