第三代无线通信标准

今天,我们正在进入第二代无线通信阶段.或者说"互联网包含一切"的阶段,这个阶段用无线传感器和控制技术来连接人类世界与虚拟电子世界.     

半导体封装技术的发展趋势

1封装的作用及电子封装工程的地位 过去,人们对"封装技术"的理解,仅限于连接、组装等,涉及的范围很窄,且多以一般的生产技术来对待.随着电子信息产业的迅猛发展,"封装技术"也逐步演变为"电子封装工程".在讨论电子封装工程的发展趋势时,需要摆脱陈旧观点的束缚,提高对其重要性的认识,应该将其视为实现高度多样化电子信息设备的一个关键技术,认真对待.电子封装的作用,简单说来有以下几点:     

固网运营商提供电子支付业务的技术实现策略

电子商务的迅速发展带动了电子支付需求的快速增长.在探讨固网运营商提供电子支付业务的技术实现策略的同时,提出了利用PSTN网络资源建立与银行(银联)连接的电子支付业务管理系统的目标架构和系统基本功能,并对电子支付平台的演进方向进行了初步的研究.     

提高系统安全性的振荡输出电路

许多电子控制系统都有使用晶体管的数字输出端.提高数字输出端安全性的一种方法就是使用一个振荡信号代替固定电压电平来表示逻辑高电平(图1).这类信号是动态可变的,可以驱动图2所示的电路.这一电路可与电子控制系统的输出晶体管相连接.动态可变信号连接到输出晶体管,而输出晶体管的集电极则与一脉冲变压器连接.如果电子控制系统因某一故障而不能产生脉冲,则继电器不动作.如果驱动电路中有故障,输出系统就处于关断状态.     

综合报道

康宁为消费电子行业介绍新超抗弯光纤康宁公司推出了ClearCurve VSDN光纤,ClearCurve超抗弯光纤系列的创新设计。该光纤具有独特的设计,用以支持计算机与新兴电子消费产品之间的高速互连。"能够将光学连接介绍到电子消费市场,我们感到非常兴奋,"康宁光纤全球营销部副总裁Barry Linchuck表示,"除了消费者拥有更高连接速度以外,设备制造商也将因为更灵活的设计而获得更轻,更可靠的连接优势,从而也降低     

2013 CES:无处不连接

带有无线和移动连接的消费电子产品越来越成为CES的主角,未来连接将成为消费电子产品的基本属性,"生而移动"和"无处不连接"已经成为必不可少的关键词……2013年全球消费电子产业的规模将突破1万亿大关,对移动和连接属性的重视给消费电子产品带来了新的发展方向。日前,2013CES(国际消费电子产品展)在美国拉斯维加斯落下帷幕。从这些年的展览来看,CES一年比一年热闹,无论是规模还是影     

业界新闻11则

中国电子口岸将于 2001年试点运行被称为"中国电子口岸”的口岸执法系统将于2001年在北京、天津、上海、广州4个进出口口岸试点运行. 系统开通后,进出口企业只要与电信公网连接,通过电子口岸的公共数据中心,在网上可直接向海关、国检、外贸、工商、税务等政府机关审办各种进出口和行政管理手续,彻底改变过去企业为了办理一项进出口业务而往返各部门的状况,实现了政府对企业"一站式”服务.此外,企业还可以通过数据中心获得运输、仓储、银行、保险等行业的中介服务;企业间也可以联网,实现真正意义上的电子商务.     

绿色电子制造及绿色电子封装材料

阐述了绿色电子制造(包括电子封装)概念起源、定义以及基本内涵和范畴,并从电子封装用互连材料、被连接材料和封装后清洗过程这三个方面全面阐述了绿色电子封装的主要内容,重点评述了目前绿色电子封装材料(包括无铅钎料、钎剂、焊膏和导电胶等)的研究现状和面临的问题.最后,展望了绿色电子制造及绿色电子封装材料的未来发展趋势.     

派睿电子的中国"暖冬"

美国"次贷危机"所产生的蝴蝶效应已经蔓延到全球各行各业.在这种严酷的经济环境下,加上半导体产业又进入了周期性的低谷期,半导体厂商切实感受到了冬天的寒冷.全球各大研究机构纷纷降低市场预测,一些厂商取消或推迟建厂计划,许多半导体著名公司进行裁员……而作为连接产业上下游桥梁的电子元器件分销商承受着来自原厂和客户两方面的压力.在整个分销业界都感到收入下滑、前景黯淡之际,派睿的表现却让人们感受到了"寒冬"中的一丝暖意.     

NEC电子与北京理工大学合作成果应用于北京奥运环保客车

近日,NEC电子中国公司宣布由NEC电子中国提供支持,北京理工大学研究开发出的车载电子控制系统,已被成功应用到用于连接北京奥运会场与奥运村的50辆环保电动客车中.     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.