共查询到19条相似文献,搜索用时 93 毫秒
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压合工序是线路板工厂中最重要的工序之一,铜皱问题是行业内推广薄铜箔最大的阻碍。文章通过自行设计简易试验装置,设计对比试验,分析了压合铜箔皱的机理,阐述了温度均匀性对铜皱的影响,完善了行业内对该问题的理论认识;提出了一种针对铜皱问题全新的解决思路和方法即通过参考树脂融化点调整压合程序的方式解决压合铜箔皱问题。 相似文献
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磁性研磨法去除激光钻孔孔口铜粒
PCB微小孔形成大多数采用直接激光钻孔,此过程中激光热熔化板面铜箔,铜会飞溅在板面特别是留在孔口成为细小铜粒,通常采用机械磨刷或化学蚀刻去除,易损伤表面铜箔和孔口.日本宇都宫大学与JCU研究所合作,开发一项用电磁研磨法除去孔口与表面铜凸出物技术. 相似文献
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随着电子信息技术的快速发展,对覆铜板用铜箔在质量上的要求越来越高。为使铜箔与基材之间有更强的结合力,需要对原铜的毛面进行粗化处理,一般是通过增大铜箔毛面的比表面积来提高铜箔的剥离强度。在铜箔获得高剥离强度的同时,也需注意铜箔毛面粗化层的微观形态对蚀刻性能的影响,避免因残铜的蚀刻不净而增加PCB出现短路的风险。本文对不同厂家HOZ铜箔的微观形态进行了研究,并由此探讨了铜箔毛面形态对PCB蚀刻性能的影响,为CCL和PCB的从业者在选用铜箔时提供一定的借鉴。 相似文献
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在厚铜板件的生产制作过程中,蚀刻一直是一个难点。为了达到蚀刻目的,制作上一般选择多次快速蚀刻或者一次性慢速蚀刻。本文通过对比不同面铜厚度的板进行蚀刻,分析比较不同蚀刻方式对蚀刻因子、线宽和线形的影响,并对其差异性进行原因分析。为生产和设计提供有价值的参考。 相似文献
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介绍了覆铜板用厚铜箔的定义、应用特性以及厚铜箔覆铜板市场,并重点讨论了厚铜箔所需达到的关键性能,以及它与PCB加工性、品质提高的关系. 相似文献
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M. Markert A. Bertz T. Gessner Y. Ye A. Zhao D. Ma 《Microelectronic Engineering》2000,50(1-4):417-423
Dry etching of copper interconnect lines in a chlorine-based plasma has been investigated. Copper dry etching was carried out in a modified diode-type reactive ion etch (RIE) system and in an inductively coupled plasma (ICP) etch system. The ICP system offers a significant increase in copper etch rate compared with the low-efficiency RIE system while maintaining excellent pattern transfer accuracy. A number of fundamental issues in high quality and high throughput copper dry etching will be discussed. Electrical characterization of patterned copper lines with line width as small as 0.25 μm indicates low electrical resistivity and good electromigration performance. 相似文献
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厚铜箔印制板尺寸稳定性研究 总被引:1,自引:0,他引:1
伴随着电源模块等大功率元器件的市场需求量不断加大,厚铜箔印制电路板的产量也不断增加,其对品质的要求也越来越严格。众所周知,厚铜箔印制电路板在其生产制作中产生的热膨胀系数量一直是影响其品质的重要因素,本文正是着眼于信息产业高科技、高精度的要求,通过对厚铜箔板的工艺流程、材料本身特点、设计三个因素来试验找出厚铜箔印制板系数补偿的重点考虑因素,同时对热膨胀系数量进行统计分析,从而保证厚铜板涨缩控制在范围之内,达到客户的要求。 相似文献
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Experimental verification of a low temperature (<20 °C), reactive plasma etch process for copper films is presented. The plasma etch process, proposed previously from a thermochemical analysis of the Cu-Cl-H system, is executed in two steps. In the first step, copper films are exposed to a Cl2 plasma to preferentially form CuCl2, which is volatilized as Cu3Cl3 by exposure to a H2 plasma in the second step. Plasma etching of thin films (9 nm) and thicker films (400 nm) of copper has been performed; chemical composition of sample surfaces before and after etching has been determined by X-ray photoelectron and flame atomic absorption spectroscopies. 相似文献
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During via and trench plasma etching in dual damascene copper interconnects process integration, polymer residues and copper damage were created as by-products of the dry-etch process. The polymer residue chemical composition and copper damage were analyzed by Auger electron spectroscopy. Analysis result indicated that besides copper, carbon, oxygen, and nitrogen and trace amounts of chlorine and sulphur were also observed. The polymer residue and copper damage are the important reasons of cause higher via contact resistance and lower via yield. It could be reduced and eliminated effectively using optimized plasma etch recipe, improved polymer residue removal methods and improved pre-treatment before metal deposition and so on. 相似文献
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355nm和1064nm全固态激光器刻蚀印刷线路板 总被引:4,自引:1,他引:3
采用输出功率8 W的355 am Nd:YVO4紫外激光器和50 w的1064 nm Nd'YAG激光器对覆铜板(CCL)和柔性线路板(FPC)进行了刻蚀实验,研究了激光功率密度、重复频率、扫描速度和单脉冲能量等加工工艺参数对刻蚀质量的影响.实验结果表明,由于铜和聚合物材料对紫外激光有更高的吸收率,紫外波段的激光只需要较低的能量就可以将表面铜层刻蚀完全,并且引起的热作用也较小.相反,红外激光加工最大的优势就是对环氧树脂和聚酰亚胺基板的破坏较小,从而适合于表面铜层的去除加工.与此同时,355 nm紫外激光器由于能快速轻易地将厚聚合物基板分离,更适合于印刷线路板(PCB)的切割成型加工. 相似文献