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使用回流填充胶的FC组装
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作者 Pericles A.Kondos Peter Borgesen 康常 《世界产品与技术》 2002年第2期60-65,共6页
引言 传统的共晶焊料filp chip组装,在芯片贴放前有两种施加助焊剂的方法:一种是施加在基板上,另一种是将芯片焊凸浸在一层助焊剂薄膜中。后一种方法提供更好的“连接力”(“Tack”),因此回流前芯片偏移的可能较小,另一方面,贴片前施加... 引言 传统的共晶焊料filp chip组装,在芯片贴放前有两种施加助焊剂的方法:一种是施加在基板上,另一种是将芯片焊凸浸在一层助焊剂薄膜中。后一种方法提供更好的“连接力”(“Tack”),因此回流前芯片偏移的可能较小,另一方面,贴片前施加助焊剂可能有助于提高产能。这两种方法在回流焊接时都需要有氮气的环境。 如图1,回流后,必须用适合的填充胶对硅片进行底部填充,在毛细作用下填充胶会流进芯片底部。免清洗助焊剂的残留物既影响底部填充时的润湿及流动。 展开更多
关键词 回流填充胶 fc组装 微电子
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Research and Development of Condensate Water Fined Processing Control System Based on FCS
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作者 Cheng Bei 《Journal of Energy and Power Engineering》 2015年第7期673-678,共6页
This paper briefly states the features and advantages of FCS (fieldbus control system). In view of condensate water fined processing system of domestic 600 MW supercritical coal-fired generating units, it designed a... This paper briefly states the features and advantages of FCS (fieldbus control system). In view of condensate water fined processing system of domestic 600 MW supercritical coal-fired generating units, it designed and developed a FCS for entirely process control, designed computer monitoring software and organized network monitor the change of data. At the same time, making the simulation device of the system, the FCS control system scheme is implemented on this device. It is verified by practice that the system control technology is advanced, safe, reliable and operation well. It provides a complete project for automation technology upgrade program in power plant. In addition, this device can be used in the power industry technical personnel training and teaching of colleges and universities. It is worth promotion and reference. 展开更多
关键词 fcS sequential function chart programmable control monitoring.
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国外工艺文献导读
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《电子工艺技术》 2003年第6期272-273,共2页
关键词 X-射线检测 电子产品 测试策略 微量点涂技术 无铅焊料 桥接 fc组装工艺
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