Interfacial microstructure and strength of lead-free Sn-Zn-RE BGA solder bumps

Rare earth (RE) elements, primarily La and Ce, were doped in Sn-Zn solder to improve its properties such as wettability. The interfacial microstructure evolution and shear strength of the Sn-9Zn and Sn-9Zn-0.5RE (in wt%) solder bumps on Au/Ni/Cu under bump metallization (UBM) in a ball grid array (B...

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Veröffentlicht in:IEEE transactions on advanced packaging 2005-05, Vol.28 (2), p.252-258
Hauptverfasser: Law, C.M.T., Wu, C.M.L., Yu, D.Q., Li, M., Chi, D.Z.
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Sprache:eng
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