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The solderability of benzimidazole films on the surface of copper is investigated by solder float test. Several factors which influence solderability of the films are discussed.

采用上锡率法研究了咪唑化合物在铜表面所成保护膜的可焊性,并探讨了咪唑化合物类型、膜厚、再流焊次数及高温热冲击对该膜可焊性的影响。

With the increase of SiO〓 layer uiickness, pseudocrystal SiO〓 initially grows into cristobalite and, then, into amorphous when its thickness beyond 3.4nm.

随着SiO〓层厚的增加,TiB〓/SiO〓多层膜中的SiO〓从赝晶结构长成方石英结构,并在SiO〓层厚超过3.4nm后转变为非晶。

In this thesis, a micro-featured surface was used as a carrier and coated a thickness of 1500 angstrom ITO to form an electric conductive film for further electroform.

本研究乃利用现已成熟的电铸技术,在微特徵光阻表面镀上一层厚为1500的铟锡氧化膜(Indium Tin Oxide,ITO),让微特徵表面形成导电膜,以利微特徵结构进行电铸。

The results showed that the main difference between two types of pea occurred in endocarp and the parchment formed at early development stage of pod.

在硬荚豌豆中,花后10d紧邻内皮层细胞的3~4层细胞逐渐伸长,细胞壁加厚,形成栅栏状的结构,在花后13d时形成厚壁细胞排列紧密的厚壁组织,即坚实的革质膜。

Seeds remaining attached in dehisced fruit; seed coat with thick inner layer of dense black sclerenchyma and spongy outer layer bounded externally by a shiny black pellicle; endosperm copious; embryo straight or slightly curved; cotyledons elliptic, flattened; hypocotyl superior.

种子附存于开裂的果中;种皮具厚的内层深黑色厚壁组织和海绵状的外层,其外部边界具发亮的黑色表膜。胚乳丰富;胚直或稍弯曲;子叶椭圆形,扁平;下胚轴上位。

Fluxible PAA solution is deposited on quartz glass substrate by MicroPendirect-writing deposition process and imidized to polyimide sacrificial layer in oven;Au paste structural layers are fabricated by MicroPen direct-writing deposition technology,and finally released by oxygen plasma dry etching process.Technological procedures and mechanisms of the LMM direct writing technology arestudied systematically by theory analysis and experiments.

在设备和材料体系基础上,系统研究了基于激光-微笔/微喷直写工艺集成制造MEMS牺牲层、结构层及导电电极图形的工艺机理和质量控制规律,结果表明:(1)笔头内径、笔头与基片间距、驱动气压和直写速度是影响微笔直写沉积膜层线宽、膜厚及表面形貌的主要工艺因素。

For thin polycrystalline films, especially those with columnar structure, once the diameter of grains on the film surface is larger than the film thickness, the total area of above and under basal planes (film-substrate interface) will be larger than that of side plane. And if the film precipitates on the substrate with thermal expansion coefficient different from that of the film, great thermal stress will be introduced during annealing.

对于薄膜特别是柱状晶薄膜,当晶粒在膜平面内的尺寸大于膜厚时,柱状晶粒的上底面和下底面的面积将大于侧面的面积,如果薄膜还附着在与其热胀系数不同的基体上并在不同于沉积温度的条件下退火时,膜中将存在较大的热应力。

Based on the summary of former measurements on elstohydrodynamic flim thickness,this paper introduces various measurements on film thickness of oil film bearing in rolling mill,and the recent fiber-optical displacement sensor and ultrasonic reflection methods are mainly illustrated.

在对弹流膜厚测量方法总结的基础上,介绍了与轧机油膜轴承油膜厚度的测量相关的技术方法,重点的介绍了近期发展的光纤位移传感器方法和超声共振方法。

The higher surface energy of substrate results in higher effective viscosity and thicker ordered molecular film.

从侧面证明了有序液体模型的正确性,即薄膜润滑的成膜性能与近固体表面润滑剂分子的有序度密切相关;足够大的外电压使无序流体膜有序化,生成较高的有效粘度和较厚的油膜,并且二者随着外电压的增加,逐渐趋于稳定;外电场作用下,摩擦系数增大,切断电源后,摩擦系数减小,但不能恢复到未加电压前的摩擦系数值。

Results: 1Lightly selective solution appeared on the surface of anodizing samples. The sample's metal surface expanded and the thickness of oxide film is 1.72 times of the control samples. 2 The samples of degassing-preoxidation group formed very thick oxide film on surface and it was 23.32 times of the control samples, the relative content of O element in thick oxide film was higher than the other 2 groups.

阳极钝化处理的试片表面发生了轻度的选择性溶解,增加了金属的表面积,所形成的氧化膜厚度是空白对照组的1.72倍。2)除气加预氧化组则形成较厚的氧化膜,为空白对照组的23.32倍,而且氧化膜内氧原子的相对含量远远高于其他实验组。

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