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Effect of Al-trace degradation on Joule heating during electromigration in flip-chip solder joints

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3 Author(s)
Liang, S.W. ; Department of Materials Science and Engineering, National Chiao Tung University, Hsin-chu, 30050 Taiwan, Republic of China ; Chiu, S.H. ; Chen, Chih

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2644061 

This study investigates the mechanism for the abrupt increase in temperature at later stages of electromigration in flip-chip solder joints. It is found that electromigration also occurs in Al traces when stressed by 0.6 A at 100 °C. Three-dimensional thermoelectrical simulation by finite element analysis was carried out to simulate the temperature distribution in solder joints with and without degradation of the Al trace. It is found that the degradation of the Al trace has substantial effect on the Joule heating of solder joints. This model can explain the serious Joule heating effect in the later stages of electromigration.

Published in:

Applied Physics Letters  (Volume:90 ,  Issue: 8 )

Date of Publication:

Feb 2007

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