A Laser-Diode-Pumped 7.36 W Continuous-Wave Nd：YVO4 Laser At 1342 nm

An efficient and high-power diode-laser single-end-pumped Nd：YVO4 laser with cw emission at 1342nm is presented. With a crystal single-end-pumped by a fibre-coupled diode laser, an output power of 7.36 W is obtained from the laser cavity of concave-convex, eorresponding to an optical-to-optical conversion efficiency of 32.8%. The laser is operated in TEM00 mode with small rms noise amplitude of 0.3%. This represents, to the best of our knowledge, the highest power obtained from a diode-laser single-end-pumped Nd：YVO4 cw laser at 1342nm 80 far.     

Improvement of Electrical Properties of the Ge2Sb2Te5 Film by Doping Si for Phase-Change Random Access Memory

Si-doped Ge2Sb2Te5 films have been prepared by dc magnetron co-sputtering with Ge2Sb2Te5 and Si targets. The addition of Si in the Ge2Sb2Te5 film results in the increase of both crystallization temperature and phasetransition temperature from face-centred-cubic （fcc） phase to hexagonal （hex） phase. The resistivity of the Ge2Sb2Te5 film shows a significant increase with the Si doping. When doping 11.8 at.% of Si in the film, the resistivity after 460℃ annealing increases from 1 to 11 mΩ.cm and dynamic resistance increase from 64 to 99Ω compared to the undoped Ge2Sb2Te5 film. This is very helpful to writing current reduction of phase-change random access memory.     

SDB/SOI双极器件失效机理与可靠性评价技术研究

对硅片直接键合/绝缘体上硅(SDB/SOI)双极电路的退化机理进行了描述。在基极-发射极反向偏置的条件下,研究了应力作用时间与器件参数的退化关系。实验结果表明,电流放大倍数β与退化时间的平方根呈线性关系;不同的反向偏压下,退化的速度也不同。建立了器件的退化模型,对双极器件在使用条件下的可靠性进行了分析。     

时尚简约形神兼备微美ME200卫星家庭影院套装组合系统印象

HE200是微美科技(中山)有限公司VIMIC(卫星音响)系列中面向市场高端(整套售价约15800元)的一套家庭影院组合系统。由于厂家将该产品的消费对象直接定位于城市中经济条件优越的白领一族，故整套系统造型精致考究而富于灵气。HE200卫星家庭影院整套系统共有七件，包括有：MQ多声道放大器一台：200SP主音箱一对；200C中置音箱一只；200S环绕音箱一对和MW无源式超重低音箱一只。     

超深亚微米集成电路可靠性技术

就超深亚微米集成电路中高k栅介质、金属栅、Cu/低k互连等相关可靠性热点问题展开讨论,针对超深亚微米集成电路可靠性问题,提出可靠性设计、生产过程的质量控制、可靠性评价与失效分析是集成电路可靠性综合评价与保证的核心思想,为产品可靠性评价与保证提供指导性参考.     

美国政府问责局：GPS项目变更决策需更多研究

美国政府问责局（GAO）向国会报告：空军军官应当在做出更新导航系统的决定之前，获取更多关于开销和用户的信息，并判定需要维持多少GPS卫星。     

石墨烯基仿贝壳层状材料的研究进展

综述了石墨烯基仿贝壳层状材料的研究进展.其主要构筑方法有层层组装、溶液浇铸、抽滤成膜和液晶纺丝等.其层间作用力的方式主要有范德华力、氢键、离子配位交联和共价交联等.由于石墨烯的引入,石墨烯基仿贝壳层状材料具有优异的显著超越天然贝壳的力学性能,强度和韧性分别可以达到贝壳的5倍和10倍以上,并具有导电、抗化学腐蚀等多种性能.