Imperial College London
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ProfessorChristopherGourlay

Faculty of Engineering, Department of Materials

Professor of Physical Metallurgy
 
 
 
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Contact

 

+44 (0)20 7594 8707c.gourlay

 
 
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Location

 

301DBessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Xian:2015:10.1007/s11664-015-4092-y,
author = {Xian, JW and Belyakov, SA and Gourlay, CM},
doi = {10.1007/s11664-015-4092-y},
journal = {Journal of Electronic Materials},
pages = {69--78},
title = {Controlling Bulk Cu6Sn5 Nucleation in Sn0.7Cu/Cu Joints with Al Micro-alloying},
url = {http://dx.doi.org/10.1007/s11664-015-4092-y},
volume = {45},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We show that dilute Al additions can control the size of primary Cu6Sn5 rodsin Sn-0.7Cu/Cu ball grid array joints. In Sn-0.7Cu-0.05Al/Cu joints, thenumber of primary Cu6Sn5 per mm2 is 7 times higher and the mean threedimensionallength of rods is 4 times smaller than in Al-free Sn-0.7Cu/Cujoints, while the area fraction of primary Cu6Sn5 is similar. It is shown thatepitaxial nucleation of primary Cu6Sn5 occurs on d-Cu33Al17 or c1-Cu9Al4particles, which are stable in the Sn-0.7Cu-0.05Al melt during holding at250C. The observed facet relationships agree well with previously determinedorientation relationships between d-Cu33Al17 and Cu6Sn5 in hypereutectic SnCu-Alalloys and result in a good lattice match with<2.5% lattice mismatchon two different interfacial planes.
AU  - Xian,JW
AU  - Belyakov,SA
AU  - Gourlay,CM
DO  - 10.1007/s11664-015-4092-y
EP  - 78
PY  - 2015///
SN  - 1543-186X
SP  - 69
TI  - Controlling Bulk Cu6Sn5 Nucleation in Sn0.7Cu/Cu Joints with Al Micro-alloying
T2  - Journal of Electronic Materials
UR  - http://dx.doi.org/10.1007/s11664-015-4092-y
UR  - http://hdl.handle.net/10044/1/42747
VL  - 45
ER  -
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