电子集成块封装工艺及传递模设计

介绍了电子集成块的封装工艺,针对电子集成线路封装要求,提出了传递模结构设计的要点,尤其对大型封装传递模的流道设计、注入压头结构、型腔设计和预防小岛移动等提出新的要求,以提高电子集成块的封装质量。     

SiON对Si基SiO2 AWG偏振补偿的数值分析

采用全矢量交替方向隐含迭代方法系统分析了高折射率SiON薄膜对Si基SiO2阵列波导光栅中波导应力双折射的影响.分析结果表明在芯区上或下表面沉积SiON薄膜可以明显减小Si基SiO2阵列波导光栅(AWG)中波导的应力双折射,但这两种补偿方法容易使模场偏移中心位置,不利于波导与光纤的耦合.理想的补偿方法是在芯区上下同时补偿,可减小模场偏移,并用该方法设计了偏振无关的16通道AWG.     

人工神经网络在边坡渗流分析中的应用

本文简要介绍了人工神经网络(即BP模型)。利用BP网络的非线性映射能力对大坝隐患进行检测，结果表明，其判别和预测大坝渗流破坏的方法简单合理，值得推广。     

紫外光直写杂化溶胶-凝胶SiO2光波导器件

利用有机/无机杂化方法制备了光敏性溶胶-凝胶(sol-gel)SiO2材料,在硅基片上旋涂成膜.研究了薄膜折射率和厚度随紫外曝光时间、后烘温度及时间等外界工艺条件的变化关系.利用紫外光直写技术,制作出1×2,1×4多模干涉(MMI)型分束器,并且观测到了分光效果较好的近场输出图像.     

水电站厂房施工技术的探析

水电站厂房施工是水电工程的重要组成部分，对工程的运转有着直接的影响。文章将就水电站厂房施工的技术进行相关的探讨。主要内容包括厂房施工的特点和施工布置与施工程序这两个部分。     

衣康酸发酵废母液的资源化利用研究

发酵母液经过滤、脱色、离子交换等工序后,利用镁铝二元水滑石的焙烧产物(LDO)对衣康酸的吸附,从而完成在发酵母液中回收衣康酸。确定了镁铝二元水滑石的焙烧产物(LDO)回收衣康酸的主要工艺条件:接触时间为5 h,pH为10,温度为313 K。并设计出一条新的从衣康酸废酵母溶液中提取衣康酸的方法。     

浅谈矿山机械维修

矿山机械是矿山企业生产的重要工具，做好矿山机械维修是使其处于良好状态，提高利用率，延长使用寿命，提高企业经济效益、增强竞争力的重要保证。     

基于SOI纳米线AWG超紧凑三向滤波器

本文针对FTTH,设计并制备了基于SOI纳米线AWG的三向滤波器。利用传输函数法模拟了器件的传输谱,模拟结果表明器件能很好的实现三向滤波的功能。通过深紫外光刻和感应耦合等离子刻蚀设备,制备了所设计的器件。输出光谱分析表明,器件的通道间串扰为-15 dB,3 dB带宽为11.04 nm,三个通道的输出波长分别为1455 nm、1510 nm和1300 nm,偏离了设计值,波长的偏移主要是由制造过程中阵列波导宽度的偏移设计宽度45 nm引起的,材料色散也是导致波长偏移设计值的一方面原因。     

Ultra compact triplexing filters based on SOI nanowire AWGs

An ultra compact triplexing filter was designed based on a silicon on insulator(SOI) nanowire arrayed waveguide grating(AWG) for fiber-to-the-home FTTH.The simulation results revealed that the design performed well in the sense of having a good triplexing function.The designed SOI nanowire AWGs were fabricated using ultraviolet lithography and induced coupler plasma etching.The experimental results showed that the crosstalk was less than -15 dB,and the 3 dB-bandwidth was 11.04 nm.The peak wavelength output from ports a,c,and b were 1455,1510 and 1300 nm,respectively,which deviated from our original expectations.The deviation of the wavelength is mainly caused by 45 nm width deviation of the arrayed waveguides during the course of the fabrication process and partly caused by material dispersion.     

Tunable filters based on an SOI nano-wire waveguide micro ring resonator

Micro ring resonator(MRR) filters based on a silicon on insulator(SOI) nanowire waveguide are fabricated by electron beam photolithography(EBL) and inductive coupled plasma(ICP) etching technology.The cross-section size of the strip waveguides is 450×220 nm2,and the bending radius of the micro ring is around 5μm.The test results from the tunable filter based on a single ring show that the free spectral range(FSR) is 16.8 nm and the extinction ratio(ER) around the wavelength 1550 nm is 18.1 dB.After thermal tuning,the filter’s tuning bandwidth reaches 4.8 nm with a tuning efficiency of 0.12 nm/℃Meanwhile,we fabricated and studied multi-channel filters based on a single ring and a double ring.After measurement,we drew the following conclusions: during the signal transmission of multi-channel filters,crosstalk exists mainly among different transmission channels and are fairly distinct when there are signals input to add ports.