Metalorganic chemical vapor deposition of silver thin films for future interconnects by direct liquid injection system

Deposition of Ag films by direct liquid injection-metal organic chemical vapor deposition (DLI-MOCVD) was chosen because this preparation method allows precise control of precursor flow and prevents early decomposition of the precursor as compared to the bubbler-delivery. Silver(I)-2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedionato-triethylphosphine [Ag(fod)(PEt₃)] as the precursor for Ag CVD was studied, which is liquid at 30 °C. Ag films were grown on different substrates of SiO₂/Si and TiN/Si. Argon and nitrogen/hydrogen carrier gas was used in a cold wall reactor at a pressure of 50–500 Pa with deposition temperature ranging between 220 °C and 350 °C. Ag films deposited on a TiN/Si diffusion barrier layer have favorable properties over films deposited on SiO₂/Si substrate. At lower temperature (220 °C), film growth is essentially reaction-limited on SiO₂ substrate. Significant dependence of the surface morphology on the deposition conditions exists in our experiments. According to XPS analysis pure Ag films are deposited by DLI-MOCVD at 250 °C by using argon as carrier gas.     

Popular biorthogonal wavelet filters via a lifting scheme and its application in image compression

A technique using a lifting scheme is presented for constructing compactly supported wavelets whose coefficients are composed of free variables locating in an interval. An efficient approach-based wavelet for image compression is developed by selecting the coefficients of the 9-7 wavelet filter and associated lifting scheme. Furthermore, the rationalised coefficients wavelet filter that can be implemented with simple integer arithmetic is achieved and its characteristic is close to the well known original irrational coefficients 9-7 wavelet filters developed by A. Cohen et al. (Commun. Pure Appl. Maths., vol.45, no.1, p.485-560, 1992). To reduce the computational cost of image coding applications further, an acceleration technique is proposed for the lifting steps. Software and hardware simulations show that the new method has very low complexity, and simultaneously preserves the high quality of the compressed image.     

Comparison of Two Statistical Models for the Calculation of Collisions of Particles in Isotropic Turbulence

Two models are given for determining the collision rate of inertial particles in a homogeneous isotropic turbulence. The advantages and disadvantages of the known models of particle collisions are discussed. One of the models suggested by us is based on the assumption that the joint probability density function of gas and particle velocities is a Gaussian distribution. The second model follows from the kinetic equation for the probability density of the relative velocity of two particles. These two models are compared with each other and with the available data of direct numerical simulation.     

溶聚丁苯橡胶连续聚合工艺

概述了溶聚丁苯橡胶连续聚合工艺的凝胶抑制技术．指出连续聚合丁艺的重点是确定合适的抑凝体系；N，N，N＇，N’-四甲基乙烯基二胺／1，2-丁二烯以及四氢呋喃／1，2-丁二烯是最常用的抑凝体系。综述了单釜连续聚合和多釜串联连续聚合工艺．对世界各大橡胶公司的连续聚合反应釜的结构进行了介绍。     

碘掺杂聚苯胺催化合成丁醛乙二醇缩醛

制备了碘掺杂聚苯胺催化剂,采用正交实验探讨了合成丁醛乙二醇缩醛的影响因素。结果表明,在n (丁醛)：n(乙二醇)=1：1．5,催化剂的用量为反应物料总质量的0．60%,带水剂环己烷的用量为8 mL,反应时间为1．0 h条件下,丁醛乙二醇缩醛的收率可达71．6%。     

9,10-二氰蒽合成方法的改进

以蒽为原料,经溴化和氰化两步合成了光敏剂9,10-二氰蒽(DCA)。从反应溶剂的选择及提纯方法等方面改进了DCA的合成方法,提高了溴化和氰化反应的收率。结果表明,溴化反应时,控制溴的滴加温度为30℃,收率可达95%;合成DCA时,采用连续抽提法提纯,以DMSO为溶剂,反应中生成的无机盐完全溶解,粗产物不经抽提DCA收率可达74%～75%;而选用N-甲基吡咯烷酮为溶剂,DCA可与溴化铜形成配合物CuBr_2·DCA·CuBr_2,此配合物加热易分解,DCA收率达到93%。     

EGD级环保型润滑油及其生物降解性

 经生物降解性评定和粘度测量确定了EGD级生物降解二冲程润滑油复合基础油的组成；通过发动机清净性试验确定了添加剂组成配方和总添加量。在此基础上，研制了生物降解二冲程油(Oil B)，其达到了ISO EGD级二冲程油标准中规定的6个发动机性能指标和2个理化性能指标，生物降解性达到73.1%。     

一种新型排液方法——对井口实施降压

论述了在南得克萨斯州某油田的21口井安装井口压缩机装置取得了很好的排液效果。这些井安装了这种局部区域型低压集输系统后,气体的产量有了显著的提高,直接使油田获得了经济效益。还介绍了选井的条件和现场试验得到的经验与结论,可以对未来的工程起到预测和分析的作用。     

A New Hand-Held Microsystem Architecture for Biological Analysis

This paper presents a hand-held microsystem based on new fully integrated magnetoresistive biochips for biomolecular recognition (DNA hybridization, antibody antigen interaction, etc.). Magnetoresistive chip surfaces are chemically treated, enabling the immobilization of probe biomolecules such as DNA or antibodies. Fluid handling is also integrated in the biochip. The proposed microsystem not only integrates the biochip, which is an array of 16times16 magnetoresistive sensors, but it also provides all the electronic circuitry for addressing and reading out each transducer. The proposed architecture and circuits were specifically designed for achieving a compact, programmable and portable microsystem. The microsystem also integrates a hand-held analyzer connected through a wireless channel. A prototype of the system was already developed and detection of magnetic nanoparticles was obtained. This indicates that the system may be used for magnetic label based bioassays