电子学报 ›› 2017, Vol. 45 ›› Issue (7): 1758-1763.DOI: 10.3969/j.issn.0372-2112.2017.07.028

• 学术论文 • 上一篇    下一篇

尘土颗粒的介电特性对电路板电化学迁移的影响

周怡琳, 朱蒙, 霍雨佳   

  1. 北京邮电大学自动化学院, 北京 100876
  • 收稿日期:2016-01-28 修回日期:2016-09-02 出版日期:2017-07-25
    • 作者简介:
    • 周怡琳,女.1972年4月出生,上海人.1999年毕业于北京邮电大学自动化学院,获电路与系统专业工学博士学位,其后一直在北京邮电大学自动化学院任教.现任测控技术与仪器中心副主任,教授.从事电接触理论与电连接可靠性方面的研究工作.E-mail:ylzhou@bupt.edu.cn;朱蒙,女.1992年1月出生,吉林人.2014年毕业于中国农业大学电气工程及其自动化专业,其后进入北京邮电大学自动化学院,硕士在读,专业为控制科学与工程,研究方向为可靠性检测技术.E-mail:395129574@qq.com
    • 基金资助:
    • 国家自然科学基金 (No.61674017)

The Influence of the Dielectric Properties of Dust Particles on Electrochemical Migration of Printed Circuit Board

ZHOU Yi-lin, ZHU Meng, HUO Yu-jia   

  1. Automation School, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2016-01-28 Revised:2016-09-02 Online:2017-07-25 Published:2017-07-25

摘要:

随着印制电路板上相邻导线之间间距不断减小,潮湿环境下的尘土颗粒改变了诱发电化学迁移失效的电场分布.本文采用有限元法对尘土污染的带电电路板上平行导线间的电场分布进行仿真分析,得出尘土介电常数和带电量对电场分布的作用机理,预测电场分布的改变对电化学迁移晶枝生长路径的影响,最后模拟实验验证晶枝生长的路径与电场分布的关系,并讨论尘土对电化学迁移失效时间的影响.

关键词: 电化学迁移, 尘土, 有限元, 电场, 电路板

Abstract:

The distance between adjacent circuits of high density printed circuit board (PCB) is reduced gradually.The particles of different components have different permittivity,which changes the electric field distribution that induces electrochemical migration (ECM) failure.In this paper,by the finite element method,the electric field distribution between the paralleled circuits with potential bias on PCB contaminated by dust is analyzed.The mechanism of the dielectric constant and the amount of charges of dust particles on the electric field distribution is studied.The effect of electric field distribution on dendrite growth path is predicted.Finally,by the electrochemical migration simulation experiments,the relation between the electric field distribution and dendrite growth path is verified.The time to failure of ECM caused by the change of electric field is also discussed.

Key words: electrochemical migration, dust, finite element, electric field, printed circuit board

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