陈旧氰化镀银槽光亮镀银工艺探讨

光亮镀银比普通镀银有更多优越的性能，除了镀层美观外，在耐变色性、镀层细致性方面也都有明显的优势，此外还具有工艺操作简便、镀层结合力强、沉积速度快、成本低等优点。当前，各种功能镀银包括光亮镀银主要在氰化物镀银体系中得到，而且氰化镀银的光亮剂品种很多。本文对几种氰化光亮镀银工艺进行了比较，着重论述了用ＦＢ光亮剂作为陈旧氰化镀银添加剂的光亮镀银工艺及实践情况。实践证明，ＦＢ光亮剂不仅适用于新配制的氰化镀     

无氰沉金工艺的实践

介绍了一种新的不含游离氰的镀金盐以及相关的无氰化学沉金工艺,无氰化学沉金工艺沉金金面的均匀性高,可减少黑焊盘(PAD)的产生机率,工艺过程更环保,生产技术成熟,管理措施齐全,金盐供应充足,对不同客户的适应性强.无氰化学沉金工艺已引起PCB同行的高度关注.     

印制板化学镀银涂覆处理工艺研究及质量控制探讨

本文在对一种印制板表面涂覆用无氰化学镀银工艺流程进行简单介绍的基础上，对所采用的无氰化学镀银工艺及质量控制技术进行了较为详细的论述：     

光罩检查系统的全新TeraFab系列

KLA-Tencor公司推出了全新系列的光罩检查系统，为晶片厂提供更灵活的配置方式，以检验进货的光罩，并检查生产光罩是否存在会降低产能并增加生产风险的污染物。TeraFab系统提供了三种基本配置，以满足逻辑集成电路和内存晶片厂及不同代光罩的特殊检查要求。这些配置为芯片制造商提供了极具成本效益的光罩质量控制的先进工具。     

KLA—Tencor推出光罩检查系统的全新TeraFab系列

KLA—Tencor公司宣布推出了全新系列的光罩检查系统，为晶片厂提供更灵活的配置方式，以检验进货的光罩，并检查生产光罩是否存在会降低产能并增加生产风险的污染物。TeraFab系统提供了三种基本配置，以满足逻辑集成电路和内存晶片厂及不同代光罩的特殊检查要求。这些配置为芯片制造商提供了极具成本效益的光罩质量控制的先进工具。     

关于对暂缓执行2014年底淘汰氰化金钾电镀金及氰化亚金钾镀金工艺规定的说明

近日,我委印发《国家发展改革委关于暂缓执行2014年底淘汰氰化金钾电镀金及氰化亚金钾镀金工艺规定的通知》（发改产业[2013]1850号）,暂缓执行《产业结构调整指导目录（2011年本）（修正）》（国家发展改革委第21号令）关于2014年底淘汰氰化金钾电镀金及氰化亚金钾镀金工艺的规定。现就有关情况说明如下：     

氰化光亮镀铜及其应用

本文研究了氰化光亮镀铜工艺,给出了较好的配方和工艺条件。氰化光亮镀铜镀层光亮、平滑、细致。在钢、铝合金等材料上附着力良好,镀液分散能力好,沉积速度快。镀层有较好的抗腐蚀性和优良的导电性。因此,氰化光亮镀铜层可以用作装饰性镍-铬的底层,也可以用作电子元件镀银或镀金的底层,从而节省30～40％的Au、Ag、Ni。优质的铜层还可使电子元件的电性能得到改善。     

外热式真空淬火炉与热处理实践

本文介绍了该厂自制简易真空淬火炉,分析了真空淬火工艺的试验结果,证明了用真空淬火工艺取代氰化淬火工艺的可行性,可使产品合格率提高达100％。     

无氰化学镀金工艺

概述了无氰化学镀金工艺,优于传统的氰化镀和无氰镀,适用于印制板等电子部品的化学镀金。     

中芯国际为Spansion生产65nm MirrorBit产品

汉高华威电子有限公司新建的电子塑封料厂日前在连云港正式运营。新厂房包括行政和生产区，占地1.5万平方米，这将使汉高华威电子塑封料的年总产能达到3.6万吨，汉高电子部全球总裁Patrick Trippel说：“我们在有限的时间内实现了从计划，产品配置到产品升级的过程，从而为全球客户提供最先进的、满足工艺要求的电子材料和本地化的客户支持提供了产能及技术上的保证。”     

HDI线路板设计的注意事项

基于国内HDI线路板设计还不是非常普及,为给更多初接触HDI线路板设计者提供切实有用的参考和借鉴,本文从可制造性的角度出发,采用归类举例的方法,深入浅出的解释了HDI加工制造中复杂的难以理解的加工工序,并阐叙了加工工序对HDI线路板设计的影响,提醒初学者在HDI设计中应该注意到的有关加工制造的事项,切实提高设计的HDI板的可制造性。本文中关HDI制造工艺的参数、布局布线的经验均来自PCB生产厂家和一线PCB设计师,有极高的普及性和通用性。     

集成电路低功耗设计

集成电路的低功耗和散热设计是ASIC(专用集成电路)芯片发展中比较突出的问题。文中从理论上对由于寄生负载电容进行充放电、漏电流和亚阈电流造成的集成电路功耗进行了探讨,从而找出降低集成电路功耗的多种方法。     

Special features of photoelectric properties of nanostructured films of hydrogenated silicon

Nanostructured Si films differing in hydrogen content, in the forms of Si-H bonds, and in certain characteristics of Si inclusions in an amorphous matrix (volume fraction, size, and structure) were studied. The behavior common to all the studied films, i.e., an increase in the defect density and nonmonotonic enhancement of photoconductivity at the “red wing” of the spectral characteristic compared to a-Si:H, was assessed. At the same time, there are films with either enhanced or reduced photoconductivity compared to a-Si:H.     

协同伙伴选择的公平性研究

在协同网络中,协同伙伴的选择是一个非常关键的问题。以前关于这个问题的解决方案本质上是基于收发的性能而忽略了协同伙伴选择的公平性。该文提出通过下述机制来获得公平性的一种新策略。(1)通过用户各自的计数器建立帮助别人就是帮助自己的机制来抑制利己主义的用户;(2)在接收端设置阈值决定是否需要伙伴中继;(3)在最大吞吐量与网络节点寿命方差之间联立以建立动态平衡。仿真结果显示:这个策略能够在性能和公平性之间达到动态平衡,从而利于整个网络的公平,其公平性优于目前所知文献的方法。     

MATLAB语言在工程数学中的几种应用

在工程数学的教学中，往往需要利用几何图形来直观地说明概念的含义、概念间的关系等，同时应尽量避免简单而繁重的计算，从而有更多的时间来突出数学原理、方法和技巧等的教学。本文以提高工程数学的教学质量、进行教学改革为目的，充分利用计算机在作图和数值计算上的优势，结合工程数学和MATLAB语言的特点，以工程数学教学中遇到的几个具体问题为例，阐明了MATLAB语言在工程数学教学中的两种潜在应用。     

Mediators of the effectiveness of online courses

A three-year field study of 17 courses, part of an undergraduate degree in information systems, compared the process and outcomes of three modes of delivery: totally online via asynchronous learning networks, traditional face-to-face courses, and sections using a mix of traditional and online activities. There were no significant differences in perceived learning by students associated with mode of delivery. Group collaboration and access to professors was perceived to be highest in mixed-mode sections, while convenience was rated highest in the distance sections. For online courses, there was generally a significant relationship between the hypothesized mediators (active participation, motivation, collaboration, access to the professor, and convenience) and perceived learning. Overall, the results of this study show that outcomes of online courses improved when professors structured them to support the growth of a learning community, by being available online to interact with students, and by using collaborative learning strategies.     

红外光谱在黑曜石真伪鉴定中的应用研究

当前珠宝市场上的人造黑曜石在外观特征、基本性质、物相组成等方面与天然黑曜石十分接近。这给消费者带来困惑,也给常规检测带来挑战。以天然黑曜石和人造黑曜石为研究对象,采用红外反射光谱法及透射光谱法相结合的方法进行了测试及对比研究。结果表明,两种材料均为“非晶质SiO2类”物质,即玻璃态物质。因形成过程、介质环境不同,在红外光谱指纹区600～1400 cm-1波段内谱带的分裂程度不同;在特征频率区2600～3700 cm-1波段内,H2O、O-H振动吸收谱带的位置及强度亦有差异。该研究结果为快速、准确、无损地鉴定黑曜石提供了一种新的技术思路。     

The internationalization of engineering education: a tale of two countries

Two international exchange programs in engineering between universities in Japan and Canada, are described in order to explain the significant benefits gained by the undergraduate and graduate students, as well as the academic staff who participate, and to highlight key principles generally followed in the design and execution of exchange programs. One notable and successful engineering exchange program is between the University of Waterloo, located in Southern Ontario, Canada, and Tottori University in Japan, while the other is between the University of Waterloo and Kyoto University in Japan. Both of these programs include foreign students taking courses for credit or audit at the host university, and, for the case of graduate students, also receiving guidance in their research. Moreover, upon completion of one academic semester in Japan, all of the undergraduate Waterloo students studying at Tottori University are employed in Japanese industry for three to four months before returning to Canada. Of paramount importance to the education of the participating undergraduate and graduate students is the opportunity to learn, by first-hand experience, the language and culture of a foreign country. In fact, one of the key findings of a survey completed by Canadian and Japanese students who took part in the exchange programs, is that living in a different culture greatly enhanced their own personal development. The addition of this international perspective to a solid education in engineering opens many doors of opportunity for exchange program alumni, who are well prepared to fully participate in the global marketplace of the 21st century, and to assist society in responsibly reaching an equitable and sustainable future.     

脉冲激光测距机电磁兼容解析

为了解决大功率脉冲激光测距机经常出现的EMI（电磁干扰）问题,提高激光测距机的电磁兼容冗余度,本文从激光测距机的工作原理出发,找到了激光测距机中形成电磁干扰的几个主要因素——激光激励源、控制及信息处理机、控制电缆。通过理论分析计算,针对性地提出了解决方案,并将其应用于实际电路中。试验结果证明该方案切实可行,能够较好地解决大功率脉冲激光测距机中存在的电磁干扰问题,为激光测距机的性能拓展打下了良好的基础。     

Numerical simulation of annular-phased arrays of dipoles forhyperthermia of deep-seated tumors

We have used the finite-difference time domain (FDTD) method to calculate the SAR distributions from an annular-phased array of eight dipole antennas coupled through water "boluses" in anatomically based three-dimensional models of the human body. We evaluated the effect of tapered bolus chambers, frequency (100-120 MHz), dipole length (17-30 cm), and phase and amplitude of power to the various dipoles on the ability to focus energy in the region of deep-seated tumors in the prostate and the liver. Assuming tumor conductivity and permittivity to be similar or slightly higher than surrounding normal tissues, calculations indicate that adjustment of the noted parameters should result in considerable improvement in focusing of SAR distributions in tumor-bearing regions. If such calculations can be shown to correctly predict empirical measurements from complex inhomogeneous (although not necessarily anatomically correct) phantoms, they may be useful for hyperthermia treatment planning based on patient-specific anatomic models.