CPU芯片封装技术的发展演变

本文主要介绍了CPU芯片封装技术的发展演变,以及未来的芯片封装技术。同时,从中可以看出芯片技术与封装技术相互促进,协调发展密不可分的关系。     

Fe－Cu包埋团簇的制备及其微观结构的研究

基于溅射－气体－聚集（ＳＧＡ）形成团簇的原理，提出了蒸发－气体－聚集（ＥＧＡ）共沉积方法，并在方华膜载网上成功地制备了Ｆｅ－Ｃｕ纳米磁性包理团簇样品。ＴＥＭ／ＥＤ分析表明，样品中Ｆｅ团簇被Ｃｕ原子所包裹，形成了以Ｆｅ团簇为芯，Ｃｕ膜为壳的良好的芯－壳式包埋结构。当衬底温度由２５℃变化到２００℃时，样品形貌由弥散状过渡到集团状，直至形成大的块状；其结构也相应的由Ｆｅ－Ｃｕ多晶共存变化为一种不规则的单晶形态。     

基于WNN和EGA的信息安全风险评估

为克服传统信息安全风险评估模型在人为权重分配中的主观性,提出一种基于小波神经网络(WNN)和熵权-灰色关联(EGA)的信息安全风险定量评估模型。该模型利用WNN得到风险事件的风险值以及各个实体的风险统计状况,通过EGA得到该风险状况排序,并计算平均风险水平,从而有效评估信息系统的安全风险。     

Oxygen release behavior of metastable tetragonal t′meta-(Ce0.5Zr0.5)2 phases prepared by reduction and successive oxidation of t′ phase

Tetragonal CaF₂-related-type t′-/Ce_0.5Zr_0.5)O₂ phase was reduced at 773 K ≤ T_red. ≤ 1073 K to prepare precursors with various oxygen compositions: Ce₂Zr₂O_712d /0.111 < δ < 0.379). Metastable tetragonal t^′_meta-(Ce_0.5Zr_0.5)O₂ phases were prepared by oxidizing in O₂ at 873 K the precursors, and subjected to evolved oxygen gas analysis by heating the samples at a constant rate. When the precursor was prepared at T_red: ? 773 K; i.e. δ ? 0:379; the oxygen release behavior of the tetragonal phase agreed approximately with that of the t^′. For δ < 0.29, distinct features of the t^′_meta-(Ce_0.5Zr_0.5)O₂ appeared in the XRD results and Raman spectra. The temperature exhibiting the maximum release rate of oxygen from the t^′_meta became lower with decreasing the d value. It could be concluded that the thermodynamic behavior of the t^′_meta is related closely to the precursor composition and becomes more unstable with decrease in the δ value. The t^′ and t^′_meta phases with disordered arrangement of Ce and Zr ions may belong to the same space group; nevertheless, difference in the random arrays of the Ce and Zr ions was suggested on the basis of the present experimental results.     

Fe／Ag复合团簇镶嵌薄膜微观结构和磁性的研究

提出了蒸发－气体－聚集（ＥＧＡ）共沉积制备复合团簇镶嵌薄膜的新方法，并分别在方华膜和单晶Ｓｉ（１１１）衬底上制备了系列Ｆｅ／Ａｇ磁性复合团簇镶嵌薄膜样品，对所制备的样品进行了透射电镜分析，Ｘ射线能谱分析和振动样品磁强计磁性测量。结果表明，样品中Ｆｅ、Ａｇ形成了相分离，为ｆｃｃ结构的Ａｇ和ｂｃｃ结构的Ｆｅ多晶共存形态；对应于不同大小的Ｆｅ团簇样品，与块材相比，Ｆｅ团簇的晶格常数呈现出不同程度的收缩，     

Effects of Minerals on the Release of Nitrogen Species from Anthracite

Abstract

Experiments have been carried out to investigate the effects of minerals on nitrogen species emission including NO and its precursors from a high rank coal during temperature-programmed combustion by TG/EGA method at 10°C/min. Sodium was found to be an excellent catalyst for the reduction of NO and HCN evolution due to its higher catalysis of sodium on the char-NO reaction. However, iron can induce an increase of NO release. Calcium and titanium additives can be classified as inactive constituents because of their weak catalysis on HCN and NO emission. All the metallic additives can promote NH₃ emission except sodium. Parent coal has higher fractions of nitrogen release as NO and NH₃ and lower fraction of nitrogen release as HCN than demineralized coal, which can be attributed to the catalysis of indigenous minerals in parent coal.     

蒸发—气体—聚集制备的Co—Ag颗粒膜微观结构与巨磁电阻特性

基于溅射－气体－聚焦（ＳＧＡ）形成纳米金属颗粒的原理,提出了蒸发－气体－聚集（ＥＧＡ）共沉积制备Ｃｏ－Ａｇ颗粒膜的新方法,并利用该方法制备了系列Ｃｏ－Ａｇ颗粒膜样品,ＴＥＭ／ＥＤ分析表明;制备态样品Ｃｏ颗粒被Ａｇ原子所包裹,能有效地阻止颗粒的表面氧化与团聚,薄膜无需经过热处理即可形成Ｃｏ与Ａｇ的相分离,其结构为ｆｃｃ－Ｃｏ和ｆｃｃ－Ａｇ非均匀相多晶共存形态;与Ｃｏ大块材料相比,薄膜中Ｃｏ颗粒晶格常     

CAT动态实时显示技术研究

介绍采用逐点擦除的原理，在ＥＧＡ／ＶＧＡ上实现动态实时显示的新方法，并结合作者研制的Ａ／Ｄ转换插件板给出相应的软硬件，本系统作为多通道波形，数字显示器在医疗上已成功地运用于危病病人监护报警。工业用带传动测试试验台和滑动轴承测试实验台的各种被测量的实时显示，收到了很好的效果。     

An application of lithium cobalt nickel manganese oxide to high-power and high-energy density lithium-ion batteries

Evolved gas analysis (EGA) by mass spectroscopy (MS) was carried out for the pyrolysis of Li_1−xCo_1/3Ni_1/3Mn_1/3O₂ (185 mAh g⁻¹ of charge capacity) and the results were compared with that of Li_1−xCoO₂ (140 mAh g⁻¹). Electrochemically prepared Li_1−xCo_1/3Ni_1/3Mn_1/3O₂ clearly shows that O₂ evolution begins at much higher temperature than Li_1−xCoO₂, suggesting that Li_1−xCo_1/3Ni_1/3Mn_1/3O₂ is superior to LiCoO₂ with respect to thermal stability. High-temperature XRD measurements of charged LiCo_1/3Ni_1/3Mn_1/3O₂-electrodes at 4.45 V were also carried out and shown that the decomposition product by heating was identified as a cubic spinel consisting of cobalt, nickel, and manganese. This indicates that phase change from a layered to spinel-framework structure plays a crucial role in the suppression of oxygen evolution from the solid matrix. In order to show practicability of the new material, lithium-ion batteries with graphite-negative electrodes are fabricated and examined in the R18650-hardware. The new lithium-ion batteries show high rate discharge performances, excellent cycle life, and safety together with high-energy density.     

DOS环境下BMP图形文件的显示

用ＴｕｒｂｏＣ２．０设计一个２５６色的ＢＭＰ图形文件重现的实用程序，可在屏幕上显示，可用于系统开发的封面中。