空间电子设备电路板可靠性可测试性设计检查

为了提高空间电子设备可靠性和可测试性设计的工作质量,采取在印制电路板生产前对其进行可靠性和可测试性设计检查的方法,可以提前在产品研发设计阶段发现可靠性和可测试性设计的不足,有针对性的加以改进,就能进一步提高产品质量与可靠性。列举了印制电路板可靠性可测试性设计检查要点,具有实际工程应用价值。     

基于红外热像技术的星载EPC热可靠性检测及分析

通过采用红外热像技术掌握了某型号星载EPC(ElectronicPowerConditioner)正样机PCB表面温度分布及其变化情况 ,试验数据的分析处理结果不仅证实了有针对性的热结构设计保证了该型号星载EPC正样机良好的热可靠性 ,同时 ,也验证了红外热像技术及相应的数据处理方法在星载EPC热可靠性检测及分析中的可行性     

电子系统的热仿真及热测试研究

通过对电子系统热控制技术的介绍,分析了电子系统的可靠性与热仿真之间的关系,阐述了热仿真的优点。详细介绍了热测试的方法和手段,突出了热测试在高热流密度热控技术中的作用,并以实际应用中的热仿真结果与热测试数据进行了比较,进一步说明了热仿真与热测试协同工作,相互验证的重要性。     

某高压电连接器的失效分析

针对某型号高压电连接器在电压冲击试验中的失效现象,进行失效分析.分析手段包括X 射线检查、内部检查和金相分析等.检测发现该元件存在多芯导线压接损伤、剥线损伤等缺陷.根据该高压电连接器的失效模式和各项检测结果,分析得出了其失效机理.最后,在元件设计、工艺控制、质量监控方面提出了改进建议.建议实施后该元件通过了各项检测,质量可靠性得到了提升.     

电解液对于锂离子电池可靠性的影响研究

以使用SW电解液和使用XZB电解液制造的1380120型号锂离子电池为研究对象,对电解液对于电池可靠性的影响进行了分析.通过倍率充放电测试、 低温测试、 短路测试、 过充测试、 过放测试和针刺测试等可靠性测试,发现:两种电解液制造的电池的电化学性能基本一致;商用SW电解液更加有利于电池低温性能的发挥;商用XZB电解液能够明显地提升电池的可靠性.     

微波功率晶体管的热失效分析

微波功率晶体管是微波功率放大器中的核心器件,其热性能在很大程度上决定于封装管芯的管壳.针对某型号的微波功率晶体管在进行生产筛选的功率老化试验时出现的热失效问题进行分析与讨论,最终确定器件管壳内用于烧结管芯的氧化铍(BeO)上的多层金属化层存在质量缺陷,使管芯到BeO的热阻增大,因此出现了老化时部分器件失效现象.提出了预防措施,既可避免损失,也能保证微波功率晶体管在使用中的可靠性.     

集成电路圆片级可靠性测试

在集成电路制造厂的工艺监控体系中引入可靠性监控对于控制产品的可靠性十分重要.圆片级可靠性测试技术通过对集成电路产品的工艺过程进行可靠性检测,能够为集成电路制造工艺提供及时的可靠性信息反馈.圆片级可靠性测试通常是采用高加速应力对各种可靠性测试结构进行测试,以实现快速的工艺可靠性评价.对半导体集成电路圆片级可靠性测试的背景、现状和发展趋势进行了概况和探讨,介绍了目前在VLSI生产中应用最为广泛的栅氧化层经时击穿、电迁移和热载流子注入效应的可靠性测试结构.     

原位水汽生长栅介质界面态特性和可靠性研究

介绍了基于原位水汽生长工艺的超薄栅介质膜的可靠性研究.通过电荷泵测试.对工艺参数与界面态密度的关系进行了定性的分析,然后通过热载流子退化和经时击穿的测试对原位水汽生长栅介质膜的可靠性进行了研究.通过测试发现,提高生长温度或减小氢气在反应气体中的比重可以获得更好的界面特性和可靠性,原位水汽生长工艺存在进一步提高的空间.     

软件测试与软件可靠性评估方法研究初探

主要从软件测试的生命周期、测试方法和流程、软件可靠性评估的定义、软件的缺陷和失效、软件的可靠性测试过程等5个方面对软件测试与可靠性评估方法进行探讨,并着重就测试前的检查、设计测试用例、测试实施、可靠性数据收集、编写测试报告等方面详述了完整的软件可靠性测试过程.     

微波数字控制移相器热特性的模拟研究

热设计是大功率移相器设计中必须考虑的环节,使用有限元仿真技术对对某型号移相器产品的热特性进行了模拟研究,建立了移相器热仿真模型.模拟所得最高结温与实验结果能较好吻合,验证了所用模型及方法的正确性.研究分析了不同芯片和基板粘结焊料空洞率、基板厚度以及不同基板材料和相对温升的关系,这些参数和温升定量关系,可以为移相器产品的热设计、优化参数、提高其可靠性提供理论依据.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

正~~     

NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During