MCM-C的CAD技术应用开发

建立了与高温共烧多层陶瓷基板工艺相适应的工艺参数库、设计规则库和常用封装库 ,使 Cadence公司的 MCM系统能适合我所 MCM-C设计。文中详细介绍了建库的情况 ,分析了使用该系统进行组件设计的优势     

Ethylene polymerization with iron‐based diimine catalyst supported on MCM‐41

A mesoporous molecular sieve MCM‐41 supported iron‐based diimine catalyst ( MC ) was prepared for the first time. The kinetic behavior of ethylene polymerization with MC was studied. The effects of Al/Fe molar ratio and various cocatalysts on the catalytic activity and properties of the polyethylene obtained were investigated. The results showed that good catalytic activities can be reached with cocatalyst methylaluminoxane (MAO) and triethylaluminium (TEA). Ethylene polymerization with MC gave polymers with higher molecular weight, melting temperature and onset temperatures of decomposition (T_onset) and better morphology than those obtained with the corresponding homogeneous catalyst. Copyright © 2004 Society of Chemical Industry     

MCM基板互连测试的单探针路径优化研究

针对MCM基板互连测试所采用的单探针技术,本文提出一种基于蚁群算法的单探针路径优化算法,通过设定合适的规则,引导探针的移动,缩短探针移动的距离,达到减少测试时间提高MCM生产效率的目的.从基于MCM标准电路的仿真结果看,采用蚁群算法得到的探针测试路径长度远远优于其它算法所得到的.     

多芯片组件技术的发展及应用

简要介绍了多芯片组件(MCM)技术的概念、分类、发展现状、应用情况等.MCM是现代组装技术的新概念,它的出现促进了SMT(表面贴装技术)与SMD(表面贴装元器件)的发展和革新,并将成为高密度、高性能、多功能封装的最佳选择.     

Self-Timed Boundary-Scan Cells for Multi-Chip Module Test

This paper presents a self-timed scan-path architecture, to be used in a conventional synchronous environment, and with basic application in digital testing and interconnections checking in a Smart-Substrate MCM (T.A. García, A.J. Acosta, J.M. Mora, J. Ramos, and J.L. Huertas, Self-Timed Boundary-Scan Cells for Multi-Chip Module Test, Proceedings of IEEE VLSI Test Symposium, April 1998, pp. 92–97). With this approach, the potential advantages of self-timed asynchronous systems are explored for their practical use in a classical MCM testing application. Three different self-timed asynchronous boundary scan cells are proposed (Sense, Drive and Drive & Sense cells) that can be connected to form a self-timed scan-path. The main advantage is that no global test clock is needed, avoiding clock skew and synchronization faults in test mode, and hence, a more reliable test process is achieved. These cells have been designed and integrated in active substrates, building several boundary-scan configurations and being fully compatible with the ANSI/IEEE 1149.1 Standard. The experimental results, as well as their comparison with their synchronous counterparts, show the feasibility of the proposed self-timed approach for testing interconnections in a MCM.     

多芯片组件倒装焊焊点三维形态预测研究

基于最小能量建立了多芯片组件倒装焊焊点成形预测模型,对其三维焊点形态进行了有效预测。通过对预测结果进行数据分析与处理,建立了钎料体积和预定间隙与焊点亮度之间的预测关系表达式。     

可实现稳定高速无线数据传输的正交频分复用技术

正交频分复用是一种多载波调制技术,具有良好的抗多径衰落的能力和非常高的信道利用率。它的信号解调和调制的过程可通过快速付立叶变换及其反变换来实现。     

VCSEL技术及其在光互连中的应用

垂直腔表面发射激光器（VCSELs）是并行光互连、高速光交换系统中最合适的光源。它具有易耦合、易封装和测试的优点。由于其独特的性能，可以较为方便地制作二维激光器阵列。基于VCSEL阵列的光电混合集成及并行光互连是当前的研究热点。本文介绍了VCSEL基本结构及设计中的关键技术，并对VCSEL在光互连中的应用进行了研究。     

GUM法和MCM法评定测量不确定度对比分析

以气象检定领域中的风速测量不确定度评定为例,分别在输入量正态分布以及其他分布两种假设情况下,对比分析了GUM法与MCM法评定风速简化模型测量不确定度结果,并对简化模型所忽略的水汽修正项带来的测量不确定度进行了量化。实例对比表明,MCM法较GUM法适用范围广,特别是针对一些复杂模型,MCM法不需要繁琐的求导过程,不需要舍弃一些小影响量的不确定度计算,使得不确定度评定结果更完整合理,可操作性强。     

介孔分子筛的合成与修饰

综述了水热法合成介孔分子筛反应条件对产物结构及稳定性的影响 ,以及对纯硅介孔分子筛进行修饰以合成嵌入式和负载型介孔分子筛的研究现状。