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Twenty First IEEE/CPMT International Electronics Manufacturing Technology Symposium Proceedings 1997 IEMT Symposium最新文献

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Thick-film intelligent sensors using new Du Pont and ESL high technology materials 厚膜智能传感器采用新的杜邦和ESL高科技材料
J. Fitt, J. Gondek, Zygmunt Parzelka, W. Zaraska
The paper presents the design and technology of production of thick-film intelligent sensors (TF-ASIC), their characteristics and applications. The novel hybrid sensors and application specific integrated sensors were made with the use of high technology materials manufactured by Du Pont Nemours Co. (USA) and ESL (USA). The authors also discuss the prospects of industrial and other applications of such sensors.
本文介绍了厚膜智能传感器(TF-ASIC)的设计、生产工艺、特点及应用。新型混合传感器和专用集成传感器采用美国杜邦内穆尔公司和美国ESL公司生产的高科技材料制成。作者还讨论了这种传感器的工业和其他应用前景。
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引用次数: 1
Silicon device pad design considerations for solder flip chip applications 焊接倒装芯片应用的硅器件衬垫设计考虑
R. Kubin, V. Ho
As the use of solder flip chip devices increases, it is important to ensure that the design and materials used in the die to solder bump structure are compatible with one another and provide a robust system that will meet reliability requirements. The key elements of this system are the final metal pad design, die passivation, and under bump metallization. This paper examines the interactions of these elements and offers some recommendations based on experimental observations.
随着焊料倒装芯片器件使用的增加,确保用于焊接凸点结构的模具的设计和材料彼此兼容并提供满足可靠性要求的强大系统是很重要的。该系统的关键是最终金属衬垫设计、模具钝化和碰撞下金属化。本文探讨了这些元素的相互作用,并根据实验观察提出了一些建议。
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引用次数: 0
Thermal enhancement and reliability of 40 mm EPBGA packages with interface materials 采用界面材料的40mm EPBGA封装的热增强和可靠性
Z. Celik, D. Copeland, A. Mertol
Increasing power requirements for Plastic Ball Grid Array (PBGA) packages demand better thermal management for increased performance and reliability. One of the important parameters that affect the rate of thermal dissipation is the thermal resistance between the package surface and the heat sink. An Enhanced PBGA package of 40 mm /spl times/40 mm body size with an Intricast plate fin heat sink was used to evaluate commercially available interface materials. Junction-to-ambient resistance of the package and the base temperature at the center of the heat sink was measured with respect to air velocity. Thermal cycling was carried out to determine the long term effects on the the thermal performance. In addition to experiments, a computational model was also used. Relative performance of interface materials was determined.
塑料球栅阵列(PBGA)封装的功率要求越来越高,需要更好的热管理来提高性能和可靠性。影响散热速率的重要参数之一是封装表面与散热器之间的热阻。采用40mm /spl倍/ 40mm机身尺寸的增强型PBGA封装和Intricast板翅片散热器来评估市售界面材料。测量了封装的结对环境电阻和散热器中心的基底温度与空气速度的关系。进行了热循环,以确定对热性能的长期影响。除实验外,还采用了计算模型。测定了界面材料的相对性能。
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引用次数: 2
Kinetics of flux residue formation in a humid environment 湿润环境中通量残留物形成动力学
A. Sinni, M. A. Palmer
Flux residue has been a manufacturing concern for many decades, as these potentially conductive residues increase the possibility of circuit failure. To avoid this, printed wire assemblies were cleaned with chloroflourocarbon (CFC) solvents. However, CFC's are very detrimental to the environment, contributing to the destruction of the ozone layer. While it is possible to identify an environmentally friendly cleaner, eliminating residue formation, and thus the need for any cleaning is also desirable. A series of studies conducted at Rensselaer demonstrated that residue forms as a result of a reaction between either the retained flux or the by-product of the fluxing reaction, and water vapor. This study evaluates the growth of residue and residue precursor (flux or by-product) in order to determine the chemical kinetics of residue formation and the relation to the soldering flux.
焊剂残留几十年来一直是制造业关注的问题,因为这些潜在的导电残留物增加了电路故障的可能性。为了避免这种情况,印刷线组件用氯氟烃(CFC)溶剂清洗。然而,氯氟烃对环境是非常有害的,有助于破坏臭氧层。虽然有可能确定一种环境友好型清洁剂,消除残留形成,因此需要任何清洁也是可取的。在伦斯勒进行的一系列研究表明,残留物的形成是残留的助熔剂或助熔剂反应的副产品与水蒸气发生反应的结果。本研究对残渣和残渣前驱体(助焊剂或副产物)的生长进行了评价,以确定残渣形成的化学动力学及其与焊剂的关系。
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引用次数: 6
Integrated development and manufacturing methodology for advanced power MOSFETs 先进功率mosfet的集成开发和制造方法
M. Kasem
This paper briefly illustrates the principles of Integrated Product Development (IPD) as an effective framework for new product development. However, the success of management implementing IPD is dependent on a number of fundamental changes in the current development process. These include emphasis on teamwork and the expansion of the role of manufacturing, as well as the application of Design for Manufacturability (DFM) as a business driver. The paper also describes the superior characteristics of 8-lead power TSSOP packages, which were developed for ultra high density Trench MOSFETs using IPD principles.
本文简要阐述了集成产品开发(IPD)作为新产品开发的有效框架的原理。然而,管理部门执行IPD的成功取决于当前发展进程中的一些根本变化。其中包括强调团队合作和扩大制造业的作用,以及将可制造性设计(DFM)作为业务驱动程序的应用。本文还介绍了采用IPD原理为超高密度沟槽mosfet开发的8引脚功率TSSOP封装的优越特性。
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引用次数: 0
High reliability assembly of chip scale packages 芯片级封装的高可靠性组装
J. Partridge, C. Hart, P. Boysan, B. Surratt, R. Foehringer
Ball Grid Array (BGA) packages with 1.27 mm pitch arrays are now being extended to fine pitch BGAs, or Chip Scale Packages (CSP) with ball diameters of 0.3 mm and array pitches as small as 0.5 mm. The current work analyzes the impact of integrating such packages into a high volume SMT assembly line and examines the impact of process and board variables on the reliability of the total assembly. The CSP chosen for the current study was a 0.75 mm pitch CSP scheduled to replace the 0.5 mm lead pitch Thin Small Outline Package (TSOP) currently used in high volume, small form factor, flash memory products. The CSP dimensions of approximately 5.6 mm by 7.4 mm represents an 80% reduction in package area compared to the traditional TSOP, with a footprint of 12 mm by 20 mm. The study examines the effect of solder paste printing parameters, flux-only assembly, and printed circuit board surface finishes such as immersion gold and solder-leveling. Solder paste volume measurements were made on over 2800 individual CSP pads during the builds using an in-line, automated laser scanning profilometer. Reliability test vehicles were assembled using CSPs, TSOPs and other surface mount components, prior to performing accelerated thermal cycling tests from 0/spl deg/C to 100/spl deg/C, and 40/spl deg/C to 85/spl deg/C. CSP placements were performed using optimized high speed chip placers to place CSPs at rates of up to 5 parts per second. Interim reliability test results after four months of testing are presented with a discussion of TSOP versus MicroBGA package construction.
具有1.27毫米间距阵列的球栅阵列(BGA)封装现在正在扩展到细间距BGA,或者具有球直径0.3毫米和阵列间距小至0.5毫米的芯片级封装(CSP)。目前的工作分析了将这些封装集成到大批量SMT装配线中的影响,并检查了工艺和板变量对整个装配可靠性的影响。目前研究选择的CSP是0.75 mm间距的CSP,计划取代目前用于大容量,小尺寸闪存产品的0.5 mm引线间距薄小轮廓封装(TSOP)。CSP尺寸约为5.6 mm × 7.4 mm,与传统的TSOP相比,封装面积减少了80%,占地面积为12 mm × 20 mm。该研究考察了锡膏印刷参数、纯焊剂组装和印刷电路板表面处理(如浸金和焊料流平)的影响。在构建过程中,使用在线自动激光扫描轮廓仪对2800多个单独的CSP焊盘进行了锡膏体积测量。可靠性测试车辆使用csp、tsop和其他表面贴装组件组装,然后进行从0/spl°C到100/spl°C、40/spl°C到85/spl°C的加速热循环测试。使用优化的高速芯片放置器放置CSP,以高达每秒5个零件的速率放置CSP。经过四个月的测试后,给出了中期可靠性测试结果,并讨论了TSOP与MicroBGA封装结构。
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引用次数: 0
A graph-based disassembly sequence planning for EOL product recycling 基于图的EOL产品回收拆解顺序规划
H. Zhang, T. Kuo
Disassembly sequence planning is an essential issue for end-of-life (EOL) product recycling. Wide diffusion of consumer goods and shortening of product life-cycle have caused an increasing quantity of used products being discarded. The most evident effect is that landfill capacity is being used up. This revolves that a systematic technology in recycling is imperative. This paper developed a graph based heuristic approach for the product recycling. The model is embedded on a graph representation which is obtained by generating disassembly sequences. With graph representation, the problem of identifying the disassembly sequence planning is transformed into a graph search problem. By solving the graph search problem, one can determine the termination of disassembly and generate the disassembly sequence. The disposition of end-of-life product is becoming very important issues recently. The proposed graph-based approach is to find the feasible disassembly sequences from the CAD system directly and automatically. The benefit is to provide some useful information for the designer to evaluate the disassembly problem during the design stage.
拆解顺序规划是报废产品回收的一个重要问题。消费品的广泛扩散和产品生命周期的缩短导致了越来越多的废旧产品被丢弃。最明显的影响是垃圾填埋场的容量正在耗尽。这围绕着一种系统的回收技术是必不可少的。本文提出了一种基于图的产品回收启发式方法。该模型嵌入到通过生成拆卸序列得到的图表示中。通过图的表示,将拆卸序列规划的识别问题转化为图搜索问题。通过求解图搜索问题,可以确定拆卸的终止点并生成拆卸序列。近年来,报废产品的处理已成为一个非常重要的问题。提出了一种基于图的方法,可以直接、自动地从CAD系统中找到可行的拆卸序列。其好处是为设计人员在设计阶段评估拆卸问题提供了一些有用的信息。
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引用次数: 58
Heat slug attach: a cyanate ester based solution 热塞剂:一种氰酸酯基溶液
C. Edwards, P. Nguyen, J. Kennedy
Today's leading-edge integrated circuits are driven by higher performance requirements, including faster operating speeds and enhanced power dissipation. These requirements create a need for thermal management. To address this need, cyanate ester (CE) based materials, commonly used in semiconductor die attach applications, can now be used to attach heat slugs to laminate packages. While other technologies, including epoxy films and solders remain viable alternatives, CE pastes provide several process advantages such as long pot life, quick-cure capability and improved process flexibility.
当今的前沿集成电路被更高的性能要求所驱动,包括更快的运行速度和更强的功耗。这些要求产生了对热管理的需求。为了满足这一需求,氰酸酯(CE)基材料,通常用于半导体芯片连接应用,现在可用于将热塞连接到层压板封装。虽然其他技术(包括环氧树脂薄膜和焊料)仍然是可行的替代方案,但CE浆料具有几个工艺优势,如锅寿命长、快速固化能力强、工艺灵活性高。
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引用次数: 0
Low temperature soldering 低温焊接
Z. Mei, F. Hua, J. Glazer, C. Key
Low temperature soldering may reduce the cost for surface mount electronic assembly by using low cost electronic components and substrate materials. It also provides options for step soldering, and reduces the risk of thermally induced damages. A vast amount of Sn-Pb-Bi-In alloys are available for any given melting temperature (liquidus) between 50/spl deg/C and 183/spl deg/C. Currently available water clean or no-clean fluxes, however, are not suitable for low temperature soldering, because they are activated at temperature higher than 150/spl deg/C. Two solderability test methods were used to evaluate the newly developed fluxes for low temperature soldering: (a) spreading test to compare the relative strength of the fluxes, and (b) wetting balance to determine the activation temperature of the fluxes. The mechanical properties (shear strength, creep, isothermal and thermal fatigue) of several common low temperature solders were determined. Prototypes of PCBs assembled with several low temperature solders were successfully built and passed typical product qualification tests. Potential problems for low temperature soldering are the poor adhesion strength of the low temperature solders to Alloy 42 leaded components, and exceptional grain growth and early thermal failure when 58Bi-42Sn was used to solder on Sn-Pb surface.
低温焊接可以通过使用低成本电子元件和衬底材料来降低表面贴装电子组装的成本。它还提供了步进焊接的选项,并降低了热致损伤的风险。大量的Sn-Pb-Bi-In合金可用于任何给定的熔化温度(液相线)在50/spl℃和183/spl℃之间。然而,目前可用的水清洁或不清洁的助焊剂不适合低温焊接,因为它们在高于150/spl℃的温度下被激活。采用两种可焊性试验方法对新开发的低温焊剂进行评价:(a)涂敷试验,比较焊剂的相对强度;(b)润湿平衡试验,确定焊剂的活化温度。测定了几种常用低温焊料的力学性能(抗剪强度、蠕变、等温和热疲劳)。用几种低温焊料组装的pcb原型成功构建并通过了典型的产品资格测试。低温焊接的潜在问题是低温焊料与42合金含铅元件的附着强度差,以及58Bi-42Sn在Sn-Pb表面上焊接时晶粒生长异常和早期热失效。
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引用次数: 19
Macro model development as a bridge between factory level simulation and LP enterprise systems 宏观模型开发是工厂级仿真与LP企业系统之间的桥梁
R. Allison, J. Yu, L. Tsai, Chih-Ming Liu, M. Drummond, D. Kayton, T. Sustae, J. Witte
The representation of a factory-level capacity model and an enterprise-level model have traditionally been incompatible. The goal of this study is to resolve the incompatibility problem. Factory systems contain detailed data striving to accurately predict facility capabilities. Enterprise optimization systems prefer an aggregation of data, representing key bottleneck resources throughout a corporation. The focus on key resources reduces modeling complexity and subsequently reduces the problem solving cycle. This study attempts to build a bridge between the capabilities of a factory simulation-based capacity planning software tool, ManSim(R)/X, and an enterprise optimization system, TEOS/sup TM/ (TYECIN Enterprise Optimization System), both from TYECIN Systems Inc. The project involves studying the predecessor of TEOS (IMPReSS 2.0) at Harris Semiconductor in Findlay, Ohio.
工厂级容量模型的表示和企业级模型的表示传统上是不兼容的。本研究的目的是解决不相容问题。工厂系统包含详细的数据,力求准确地预测工厂的能力。企业优化系统更喜欢数据聚合,代表整个公司的关键瓶颈资源。对关键资源的关注减少了建模的复杂性,并随后减少了问题解决周期。本研究试图在基于工厂模拟的产能规划软件工具ManSim(R)/X和企业优化系统TEOS/sup TM/ (TYECIN企业优化系统)之间建立一座桥梁,两者都来自TYECIN Systems Inc.。该项目包括在俄亥俄州芬德雷的哈里斯半导体公司研究TEOS的前身(IMPReSS 2.0)。
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引用次数: 4
期刊
Twenty First IEEE/CPMT International Electronics Manufacturing Technology Symposium Proceedings 1997 IEMT Symposium
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