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A statistical mechanics model to predict electromigration induced damage and void growth in solder interconnects

Author

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  • Wang, Yuexing
  • Yao, Yao
  • Keer, Leon M.

Abstract

Electromigration is an irreversible mass diffusion process with damage accumulation in microelectronic materials and components under high current density. Based on experimental observations, cotton type voids dominate the electromigration damage accumulation prior to cracking in the solder interconnect. To clarify the damage evolution process corresponding to cotton type void growth, a statistical model is proposed to predict the stochastic characteristic of void growth under high current density. An analytical solution of the cotton type void volume growth over time is obtained. The synchronous electromigration induced damage accumulation is predicted by combining the statistical void growth and the entropy increment. The electromigration induced damage evolution in solder joints is developed and applied to verify the tensile strength deterioration of solder joints due to electromigration. The predictions agree well with the experimental results.

Suggested Citation

  • Wang, Yuexing & Yao, Yao & Keer, Leon M., 2017. "A statistical mechanics model to predict electromigration induced damage and void growth in solder interconnects," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 468(C), pages 195-204.
    • Handle: RePEc:eee:phsmap:v:468:y:2017:i:c:p:195-204
    DOI: 10.1016/j.physa.2016.11.016
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    Cited by:

    1. Ren, Minghui & Zhao, Guangsi & Zhou, Guoqing & Qiu, Xianhao & Xue, Qinghua & Chen, Meiting, 2018. "Using strain dynamics for fracture warning of shaft lining," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 507(C), pages 406-413.

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