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在市场上逐步推广的液晶模块(LCM)生产中,其LCD系列驱动电路的封装工艺主要采用裸芯片的COB(chip on Board)封装方式。文中通过总结自行设计和加工的LCD系列电路在应用厂商批量使用过程中出现的COB封装问题,对COB的工艺流程、COB工艺中的关键工艺——键合以及主要的失效点以及常见的失效原因进行分析,并结合在实际推广过程中问题的解决方法,对LCD系列驱动电路和其他芯片在COB应用中主要出现的键合不良、边缘铝层颜色异常、钝化孔残留、键合参数、COB环境等方面问题加以整理归纳,并提出了可行的解决办法。 相似文献
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鲜飞 《电子工业专用设备》2002,31(3):131-134
论述了微电子封装技术的现状与未来 ,介绍了微电子封装中几个值得注意的发展动向 ,同时 ,从中可以看出IC芯片与微电子封装技术相互促进 ,协调发展密不可分的关系。 相似文献
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Weidong Huang Xuhong Wang Li Wang Mei Sheng Liqiang Xu Frank Stubhan Le Luo 《Journal of Electronic Materials》2004,33(2):101-105
The moisture diffusion in globtop material for a chip-on-board (COB) package coated with SiNx and silicone, respectively, or coated with SiNx plus silicone were measured by embedding a humidity sensor in the globtop and recording the capacitive change in three different
temperature/humidity environments. The experimental results were simulated by Fick’s diffusion law with finite-element method
modeling. The moisture diffusion coefficients and activation energies were calculated to quantitatively compare the moisture-resistance
effects of different coatings. For example, at 85°C/85% RH, the moisture diffusion coefficients for the uncoated reference,
SiNx-coated, silicone-coated, and silicone/SiNx double-layered coated samples are 1E-5, 0.8E-5, 0.7E-5, and 0.2E-5 mm2/s, respectively. The experimental and simulation results show that double-layered coating with silicone/SiNx has excellent moisture-resistance properties because it not only smoothes the steps on a printed circuit board (PCB) but
also keeps the good moisture resistance of the inorganic films. 相似文献
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表面贴装技术 (SMT)和板载芯片技术 (COB)在当今电子产品组装中起着越来越重要的作用。从工艺方案的确定至具体的工艺实施 ,介绍了表面贴装技术与板载芯片技术相结合的混装工艺在CIS生产中的应用。 相似文献
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