共查询到20条相似文献,搜索用时 734 毫秒
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Influence of Interconnection Configuration on Thermal Dissipation of ULSI Interconnect Systems 总被引:1,自引:0,他引:1
应用一个三层互连布线结构研究了诸多因素尤其是布线的几何构造对互连系统散热问题的影响,并对多种不同金属与介质相结合的互连布线的散热情况进行了详细模拟.研究表明互连线上焦耳热的主要散热途径为金属层内的金属线和介质层中热阻相对小的路径.因此互连系统的几何布线对系统散热具有重要影响.在相同条件下,铝布线系统的温升约为铜布线的ρAl/ρCu倍.此外,模拟了0.13μm工艺互连结构中连接功能块区域的信号线上的温升情况,探讨了几种用于改善热问题的散热金属条对互连布线的导热和附加电容的影响. 相似文献
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铜互连布线及其镶嵌技术在深亚微米IC工艺中的应用 总被引:4,自引:0,他引:4
近几年来 ,随着 VLSI器件密度的增加和特征尺寸的减小 ,铜互连布线技术作为减小互连延迟的有效技术 ,受到人们的广泛关注。文中介绍了基本的铜互连布线技术 ,包括单、双镶嵌工艺 ,CMP工艺 ,低介电常数材料和阻挡层材料 ,及铜互连布线的可靠性问题 相似文献
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本文提出了一种基于拓扑分析的多层通道布线算法。算法把整个布线过程分成拓扑分层和物理布线两个部分。拓扑分层利用线段交叠图及模拟退火算法解决线段分层及通孔最少化问题,物理布线过程引入虚拟走线道解决交叉问题,再利用轮廓线跟踪的方法来决定最终确定各线段的布线位置。算法还解决了多层布线分层的管脚约束问题和相邻约束问题。实验结果表明,这是一种有效的方法。 相似文献
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MCM-D多层金属布线互连退化模式和机理 总被引:1,自引:0,他引:1
介绍了MCM-D多层金属互连结构的工艺及材料特点,并就Cu薄膜布线导体的结构特点和元素扩散特性。说明了多层布线互连退化的模式和机理,以及防止互连退化的技术措施,实验分析表明,Au/Ni/Cu薄膜布线结构的互连退化原因是,Cu元素沿导带缺陷向表层扩散后,被氧化腐蚀,导致互连电阻增大,而Cu元素在温度应力作用下向PI扩散,导致PI绝缘电阻下降。 相似文献
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集成电路元器件密度与性能的不断提高是以集成电路关键尺寸的不断缩小和芯片内信号互连布线不断复杂化,布线层数不断增加为代价的。 相似文献
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互连线时延是集成电路设计中非常重要的影响因素。本文根据Elmore延迟模型推导出多端互连线的延迟估算公式,得出了在满足设计规则的前提下,多端互连线网络应尽量遵守的布线规则,即互连线之间不要有重叠,且从源点到每个终点都要走最短的曼哈顿路径。这种布线规则可以在不增加芯片面积的基础上使互连线时延减少,这对指导高速IC芯片的版图设计有重要的理论和实践指导意义。 相似文献
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Baojun Fei Mingbing Fei Zhenghong Chen 《Electromagnetic Compatibility, IEEE Transactions on》1999,41(3):196-201
The authors of this paper discover the high electric conduction property of the composite copper-clad steel wire; that is to say, in a specific frequency domain, its electric conduction property is higher than that of copper wire having the same diameter. This paper describes the relationship between this high conduction property as a function of the frequency and structure of the wire and points out that the property results from the reflection of an electromagnetic (EM) wave at the interface inside the composite wire 相似文献
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铝丝键合作为一项半导体产品的封装工艺,被广泛用于连接半导体器件内具有铝焊盘4的芯片与其它元件。然而,如果产品内铝丝连接设计或者键合工艺参数超出铝丝材料承受能力,会降低产品的可靠性。本文以铝丝键合失效案例为起始,设计铝丝键合工艺研究试验,对铝丝所能承受的最高弧度和最大跨度进行了讨论和总结,并提出修改意见。通过对比调整前后产品内铝键合丝拉断力和拉断力标准差,证明修改后该产品可靠性明显得到了提升,也论证本文更改建议的正确性。 相似文献
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Wire bonding is one of the main processes of the LED packaging which provides electrical interconnection between the LED chip and lead frame.The gold wire bonding process has been widely used in LED packaging industry currently.However,due to the high cost of gold wire,copper wire bonding is a good substitute for the gold wire bonding which can lead to significant cost saving.In this paper,the copper and gold wire bonding processes on the high power LED chip are compared and analyzed with finite element simulation.This modeling work may provide guidelines for the parameter optimization of copper wire bonding process on the high power LED packaging. 相似文献
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The results and methods of calculation of resistance of hollow wire in gigahertz range by Bessel function are given. According to the results of computation, it is found that the resistor of conductor can be optimized using hollow wire with specific wall thickness. At high frequency the current distribution across a circular hollow wire is at surface of wire, which is called skin depth. We found that optimum wall thickness is proportional to skin depth and the phase abrupt change point of H field. Theoretical analysis and mechanism optimized round hollow wire will be presented in this paper. The calculation indicates that cylindrical hollow wire can be optimized to decrease resistance above 8%. 相似文献
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FENG Yong-jian ZHANG Tao 《微纳电子技术》2003,40(7):415-418
The results and methods of calculation of resistance of hollow wire in gigahertz range by Bessel function are given. According to the results of computation, it is found that the resistor of conductor can be optimized using hollow wire with specific wall thickness. At high frequency the current distribution across a circular hollow wire is at surface of wire, which is called skin depth. We found that optimum wall thickness is proportional to skin depth and the phase abrupt change point of H field. Theoretical analysis and mechanism optimized round hollow wire will be presented in this paper. The calculation indicates that cylindrical hollow wire can be optimized to decrease resistance above 8%. 相似文献
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The deformation of gold wire bonds during transfer molding of stacked chip scale package (CSP) can seriously cause wire crossover and shorting. The major challenges of the stacked CSP development are to reduce the wire sweep (deflection), and make the sufficient space clearance between the wires of first to second die. In this paper, M shape wire looping program is developed to increase the wire sweep resistance in the stacked CSP. Both linear elastic finite element analysis and experiments based on wire bonding and molding process evaluation are conducted. It is found that M shape looping program is much better than conventional normal wire shape in terms of wire sweep resistance after molding. X-ray and scanning electronic microscopy (SEM) can verify the improvement of wire deflection after chemical de-capsulation. It is believed that using M shape looping program can efficiently overcome the risk of wire shorting and improve the yield of wire bonds in high volume production of stacked CSP. 相似文献
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Transmission lines with rectangular cross sections are usually used in integrated circuit (IC) and computer chip problems. In this paper, a full-wave method is proposed based on an efficient wire model to analyze transmission-line circuits, where the cross sections of wires can be arbitrary. Comparing the existing wire models in the method of moments, it has been shown that the best performance occurs when the current is assumed to flow along the electrical axis of a wire and the testing is on the whole surface if two wires are very close. The physical significance of such modeling implies that the surface current on a wire is equivalent to a current filament along the electrical axis. For a single round wire, the electrical axis is exactly the same as its geometrical axis. For two parallel round wires, the electrical axis of each wire is located at the image position of the other wire. In this paper, a general wire model is proposed to determine electrical axes of wires with arbitrary cross sections by solving a static problem. Then, full-wave formulations are derived for wire structures with rectangular cross sections, which are the most important for IC and computer-chip problems. Numerical simulations are given to test the validity and accuracy of the proposed method. 相似文献
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Wire bonding is one of the main processes of the LED packaging which provides electrical interconnection between the LED chip and lead frame. The gold wire bonding process has been widely used in LED packaging industry currently. However, due to the high cost of gold wire, copper wire bonding is a good substitute for the gold wire bonding which can lead to significant cost saving. In this paper, the copper and gold wire bonding processes on the high power LED chip are compared and analyzed with finite element simulation. This modeling work may provide guidelines for the parameter optimization of copper wire bonding process on the high power LED packaging. 相似文献