共查询到20条相似文献,搜索用时 755 毫秒
1.
2.
3.
4.
5.
废印刷电路板回收处理技术的研究进展 总被引:5,自引:1,他引:4
随着信息社会发展速度日益加快,电子电器产品数量的增长以及产品更新换代速度也不断加快,由此产生了大量的电子废弃物,并以每年近10%的速度增长.文章主要介绍了废旧印刷电路板(PCB)回收利用问题,综述了目前几种重要的常规废印刷电路板回收处理技术,并对这些方法做了简要的分析.还着重介绍了两种极具发展前景的新型废印刷电路板回收处理技术. 相似文献
6.
7.
8.
9.
10.
11.
利用对氨基苯磺酸改性木质素磺酸钙制备生物吸附剂,研究它对废弃印刷线路板非金属成分中有害重金属离子(Pb2+、Cd2+、Hg2+、Cr2O72-)的吸附行为及其影响因素。结果:制备的对氨基苯磺酸改性木质素磺酸钙树脂可有效地去除废弃印刷线路板非金属成分中重金属离子,经吸附条件优化后对Pb2+、Cd2+、Hg2+、Cr2O72-的吸附率分别为:86.6%、79.4%、88.4%、和86.7%。这为废弃印刷线路板非金属成分的绿色资源化提供了有效地技术方法。 相似文献
12.
13.
《Electrochimica acta》2001,46(1-2):85-89
The requirement of miniaturization of printed circuit boards has been increased with downsizing of electronic devices. However, the conventional multi-layered printed circuit boards are now facing the limitation for high mounting densities. Therefore, a newly developed build-up process has emerged as a new multi-layered printed circuit board manufacturing process. This new technology has adopted the micro-vias for connection between each conductive layer. If the micro-vias can be filled with copper metal, signal propagation is enhanced by via-on-via connection. Therefore, effective circuitry can be achieved. However, filling the conductive layer with the micro-vias is becoming difficult using the conventional plating process or the electrical conductive paste. Filling of the micro-vias by electroplating is studied. It was confirmed that copper sulfate concentration in copper sulfate plating bath is one of the key factors to fill the micro-vias, and the vias can be filled using a high copper concentration bath. 相似文献
14.
15.
16.
17.
Sun Yue Pan Jianfeng Liu Lingling Fang Youtong Han Gaorong Liu Jiabin 《Journal of Applied Electrochemistry》2022,52(8):1219-1230
Journal of Applied Electrochemistry - Surface roughness and mechanical strength are significant properties of copper foils for printed circuit boards. Stable performance is highly required for the... 相似文献
18.
Journal of Porous Materials - Polyimides with low dielectric constants are important raw materials for the fabrication of flexible printed circuit boards and other microelectronic applications. As... 相似文献
19.
The determination of the glass transition temperature of a cured resin system is necessary for the classification of the temperature region of usable service. For the printed circuit board industry, accurate and consistent properties of the copperclad laminates that are used as the substrate are essential. Variations in material properties of the finished laminates may become a hindrance in subsequent steps in the manufacturing of printed circuit boards and more importantly in the failure rate of the boards during service. In this research, a one-dimensional finite difference method has been implemented with constitutive models to simulate the progression of the degree of cure and glass transition temperature during the processing of copper-clad, multi-layered, fiber mat reinforced, epoxy laminates. The numerical results have been compared to experimental measurements and it has been found that the simulation predicts the experimental observations quite well. 相似文献
20.
化学镀及化学处理取代热风整平工艺探讨 总被引:5,自引:0,他引:5
热风整平工艺一直是印刷线路板制作中重要的后处理工艺,但是,随着印刷线路板的精细化和环境保护的需要,热风整平工艺的应用已经受到限制。由此,产生了一些替代工艺,包括化学防氧化、化学镀镍/金、化学镀锡及锡合金等。其中化学镀锡及锡合金最有可能成为取代热风整平的主流工艺。 相似文献