机载电子设备机柜布线工艺设计

时电子机柜传统的走线方式进行了分析、解剖，提出了新的走线方案模式，从工艺角度时机柜走线结构进行了改进设计，使之更适合于机栽机柜的布线要求。     

泛华恒兴推出一系列高标准化通用测试机柜

近日,北京泛华恒兴科技有限公司（简称：泛华恒兴）新推出了一系列符合专业测试产品机柜安装的通用测试机柜。机柜采用铝型材架体全新设计,在机柜受力、电磁屏蔽、等电位、恒温控制、电气走线和仪器上架安装等方面针对测试测量系统进行专门的设计,并提供标准的安装附件进行各类标准和非标仪器设备的上架安装。     

行业视点

新品推荐泛华恒兴推出一系列高标准化通用测试机柜近日,北京泛华恒兴科技有限公司(简称:泛华恒兴)新推出了一系列符合专业测试产品机柜安装的通用测试机柜。机柜采用铝型材架体全新设计,在机柜受力、电磁屏蔽、等电位、恒温控制、电气走线和仪器上架安装等方面针对测试测量系统进行专门的设计,并提供标准的安装附件进行各类标准和非标仪器设备的上架安装。该系列机柜拥有不同的尺寸选型,可满足大多数测试设备     

多专业协同背景下的一体化机柜空间布局研究

针对目前楼宇内光缆和网络设备缺乏统一规划和布局,走线路由、设备摆放混乱等问题,基于多专业协同一体化机柜空间布局,综合考虑不同的场景,全局规划有线、无线接入资源,将各类设备合理安装在一体化机柜内。结果表明一体化机柜的规划布局能优化机房空间布局,节约投资,方便后期维护,提升运营企业形象。     

带状电缆及穿刺连接技术

带状电缆又名扁平柔性电缆,在国外六十年代已经广泛应用。我们所在对带状电缆进行了一系列研究测试的基础上,已在DJS——240计算机和DJS-184计算机上采用,实践证明效果良好。众所周知,在电子产品中,机柜(箱)内部,机柜(箱)之间,设备之间的信号传递,电源的供给是靠电缆来实现的。尤其是电子计算机,传输电缆一般都很多,而且为了防止相互干扰,一般采用双扭线。对这许多复杂的走线,通常的作法是将这些导线捆扎成线缆把(图1)或者是编织成线缆片(图2)。这些作法实际上存在很多问题:     

舰用密闭机柜的电磁兼容设计

针对新型舰用铸铝密闭机柜的研制，运用现代设计理念，对于机柜的电磁兼容设计作了详尽的分析与实验，文章从机柜上可能的泄漏途径着手，在理论上对其进行定性、定量分析，探讨了机柜EMC设计的思路和方法。     

舰载电子装备环境机柜模块化开放式设计思路

针对近年来国内外装备体系建设对舰载电子装备抗恶劣环境电子机柜提出的新需求,介绍了开放式环境机柜的设计思想,提出了应用该思想进行电子环境机柜设计的一些具体技术途径,最后对未来开放式环境机柜的发展进行了展望。     

OLED金属走线弯折过程裂纹扩展有限元分析

针对OLED面板COF(Chip on Film)连接过渡区在弯折过程中易发生金属走线断裂的问题,本文对金属走线中裂纹的扩展机理以及抑制裂纹扩展的方法进行了研究。基于复合材料界面裂纹偏转与穿透理论分析了金属走线与有机光阻界面处的裂纹扩展方式,比较了两种金属走线结构在裂纹扩展过程中的应力强度因子变化。仿真结果表明,金属走线与有机光阻的裂纹倾向于沿垂直走线的方向扩展,裂纹沿着界面扩展的趋势很小。对比两种不同金属走线(环状与条状)的应力强度因子发现,环状金属走线内部靠近孔处的应力强度因子降低了95%,能有效抑制金属走线中的裂纹扩展。     

舰载雷达发射机柜热状态仿真分析

针对雷达发射机柜工作时温度过高会降低电子元器件寿命这一状况，本文简化机柜模型。建立有限元模型，运用ESC软件分析两种不同通风条件下机柜内部热状态，并对结果进行比较．为机柜通风装置设计提供理论依据。     

云计算数据中心机柜能源管理专利回顾

针对云计算数据中心内部机柜的能源散热管理进行专利回顾，由云计算机房机柜的摆置至机柜内服务器的散热设计,从多方面探讨不同形态的散热设计、设备配置方法，以及达到预期的效果。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.