非稳态薄液膜下PCB微纳米尺度环境损伤机制

项目名称： 非稳态薄液膜下PCB微纳米尺度环境损伤机制

项目编号： No.51271032

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 肖葵

作者单位： 北京科技大学

项目金额： 80万元

中文摘要： 高度集成化的印刷电路板（PCB）在复杂环境因素作用下的环境损伤是由于微纳米尺度的腐蚀产物萌生、蠕动导致的，尺寸效应和环境因素使得其腐蚀是在非稳态薄液膜下的电化学过程。因此，非稳态薄液膜下微纳米尺度腐蚀产物的萌生、蠕动成为阐明PCB环境损伤机理的关键问题和研究难点。本项目利用微观原位分析手段表征腐蚀产物的结构特征和演变规律，探明薄液膜形态分布和变化与腐蚀产物萌生、蠕动的内在联系，揭示腐蚀产物蠕动历程中微纳米尺度的结构和化学不均匀对环境损伤影响；采用微区电化学新技术,明确动态薄液膜对腐蚀产物金属离子传质过程和电极反应的影响规律；考察微量气体、电场、磁场等环境因素对腐蚀产物萌生、蠕动的影响，明晰多种因素协同作用下微纳米尺度环境损伤机制；采用电极过程模拟和元胞自动机等数值分析方法，建立非稳态薄液膜下金属腐蚀产物萌生、蠕动行为规律及环境作用机理模型。

中文关键词： 印刷电路板；非稳态薄液膜；微纳米尺度；环境损伤；腐蚀产物

英文摘要： Environmental damage of highly integrated printed circuit board (PCB) in complex environment is caused by breeding and peristalsis of micro- nano corrosion products of . Due to the influence of size effect and environmental factors, the corrosion is a electrochemical process under unsteady-state thin electrolyte film.Therefore, the key issues and problems to clarify the mechanism of environmental damage of PCB is to study the breeding and peristalsis of micro- nano corrosion products of under unsteady-state thin electrolyte film. In this project, in-situ micro analysis measurement is used to characterize the structural feature and evolution of corrosion products, which helps to prove the relationship between the distribution of thin electrolyte film and breeding and peristalsis of corrosion product, thus the influence of uneven structure and chemical behavior in the peristalsis process of corrosion on the environmental damage can be revealed. Micro-electrochemical technology is used to discover influence of dynamic thin electrolyte film on metal ions mass transfer process of corrosion products and electrode reaction; and to investigate the influence of environmental factors such as trace gas, electric and magnetic fields on the breeding and peristalsis of corrosion products, so as to study the environmental da

英文关键词： Printed circuit board （ PCB ）；Unsteady State thin electrolytefilm；Micro-nano scale；Environmental damage；Corrosion product