|Dependence of electromigration damage on Sn grain orientation in Sn-Ag-Cu solder joints|
|J. Q. Chen; J. D. Guo; K. L. Liu; J. K. Shang
|Source Publication||Journal of Applied Physics
|Abstract||The relationship between the "polarity effect" of electromigration on interfacial intermetallic growth and the Sn grain orientation was investigated in Sn-Ag-Cu solder joints. The growth of the interfacial intermetallic compound was found to depend strongly on the Sn grain orientation. When the c-axes of the Sn grains were closely aligned to the current flow direction, a severe polarity effect was observed in which the anode interface was covered with a thick layer of Cu-Sn intermetallic while the intermetallic layer at the cathode interface was almost depleted. If the c-axes of the Sn grains were rotated away from the current direction, the polarity effect became less pronounced. When the c-axis was perpendicular to the current direction, the polarity effect essentially disappeared. The difference in the intermetallic layer thickness between the anode and the cathode, Delta d, followed a parabolic function of the cosine of the angle, a, between the c-axis and the current direction. A kinetic model based on the highly anisotropic diffusion behavior of Cu in Sn was presented to explain the relationship between the electromigration polarity effect and Sn-grain orientation. The model showed good agreement with the experimental data. (C) 2013 AIP Publishing LLC.|
; guo, jing-dong
; liu, kai-lang
; shang, jian-ku] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [shang, jian-ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa.
; guo, jd (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.
|Keyword||Intermetallic Compound Formation
J. Q. Chen,J. D. Guo,K. L. Liu,et al. Dependence of electromigration damage on Sn grain orientation in Sn-Ag-Cu solder joints[J]. Journal of Applied Physics,2013,114(15).
J. Q. Chen,J. D. Guo,K. L. Liu,&J. K. Shang.(2013).Dependence of electromigration damage on Sn grain orientation in Sn-Ag-Cu solder joints.Journal of Applied Physics,114(15).
J. Q. Chen,et al."Dependence of electromigration damage on Sn grain orientation in Sn-Ag-Cu solder joints".Journal of Applied Physics 114.15(2013).
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