查询词典 crack

For wire bonding,we got methods to avoid low-k material layer crack and IMC crack by gold wire selection,capillary design optimization,and wire bonding process window study;Wire sweep issue was declined,after use reverse wire bonding technology to get low wire loop,define high wire loop and low wire loop between neighbour wires to reduce wire cross and split transfer course into several segments by different transfer speed to control mold flow;For molding and to different packages,as a physical method,add suitable presser during different cure process,it can reduce warpage value;As chemical methods,optimized component of molding compound or added flexiblier,it can decline thermal stress and warpage.

在引线键合方面，通过对不同纯度金线的选择、劈刀设计的优化、以及对引线压焊工艺窗口的研究，找到了可降低焊盘碎裂，金铝间化合物分层等问题的方法；通过使用反向压焊来控制线线弧高度和在邻近线间使用高(来源：A7aB4848C论文网www.abclunwen.com)低线弧来控制线弧以及模塑注塑速度细分化的方法，有效降低了冲线值；在模塑方面，针对不同封装形式，通过封装模块在烘烤过程中优化外加压力的时机，利用物理方法有效减低了翘曲；此外从化学角度出发，通过对模塑材料配方的优化以及添加应力释放剂，有效降低了封装内的热应力，减小了封装模块的翘曲。

By measuring the residual stresses of the cylinder of a cement ball mill in four cases,and the fatique crack spreading for the thermal treatment and the un thermal treatment test samples,the results showed that the heat treatment sample reduced the residual stress,enhanced the fatique strength and lowered the crack spreading speed.

对球磨机筒体的4种情况的焊件进行残余应力测试，并对进行热处理和未进行热处理的试件做疲劳试验及疲劳裂纹扩展测试。试验结果表明：经过热处理的试件，残余应力降低，疲劳强度提高，裂纹扩展速率降低，结构抗疲劳性能增强。不过从工程应用角度看，对于板厚为20～25mm的球磨机筒体而言，不进行焊后热处理也能保证足够的疲劳强度

In thermal cycling, electrical resistance of solder joints in daisy chain configured assembly was measured. At the same time, a variety of failure analytical tools were employed to inspect the damages in the assembly including solder joint crack, underfill delamination and crack.

在加速试验过程中，测量电参数的同时，利用多种失效分析方法详细研究了封装中的缺陷和损伤，如焊点和下部填充料中的裂缝、以及下部填充料与芯片之间的分层。

The pH value and electrode potential at crack tip are decreased along with crack growth.

当裂纹长度一定时，裂纹内的pH值和金属电极电位都随着裂纹深度的增加而单调降低。

This dissertation mainly discusses the control of temperature stress in mass concrete baseplate in the foundation of the building. By studying the effects of temperature stress of a variety of factors and Reinforced Crack configuration, control crack of mass concrete baseplate.

本文以大体积混凝土底板结构施工中的温度应力和温度裂缝为研究对象，通过研究影响温度应力的多种因素及通过配置抗裂钢筋来达到控制温度裂缝的目的。

A full of strain energy accumulates in the top of blasting crack; and the mode of caustics of latter crack is close to the common dynamic caustics.

初步提出了爆炸裂纹的大部分扩展是应变能释放的动态卸载破坏的结论。

Based on fatigue curve in the crack initiation process,a numerical method to compute the fatigue crack extension ,is proposed.

在进行岩石类材料疲劳断裂破坏的数值分析时，将损伤力学将裂纹形成与裂纹扩展两个过程有机结合在一起。

For the DC leakage current could not effectively evaluate the state of DC feeder cable insulation layer with cut or crack, the discharge theory and its characteristic were studied in the DC feeder cable under special condition, and the DC discharge was proposed to detect the insulation cut or crack fault in DC feeder cable.

针对泄漏电流检测直流馈出电缆绝缘破损故障效果不佳的问题，研究了直流馈出电缆破损状态下的放电机理及特征，提出采用直流放电法检测直流馈出电缆破损故障。

Aiming at filler wall quality problems,it analyzes the chief origins of the filler wall crack,brings forward corresponding prevention measures,overcomes the filler wall crack quality control problems basic with the reinforced management in construction,and increase the quality requests of housing.

针对填充墙体的质量问题，分析了填充墙体产生裂缝的主要原因，提出了相应的防治措施，并在施工中加强管理，基本克服了填充墙体裂缝的质量控制难题，提高了住宅楼的质量要求。

Do not force the peg to fit the crack, choose one that fits the crack.

不要强把peg塞进裂缝，挑个适合那个裂缝的peg。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。