The influence of solder composition on the impact strength of lead-free solder ball grid array joints

Tsukamoto, H., Nishimura, T., Suenaga, S., McDonald, S. D., Sweatman, K. W. and Nogita, K. (2011) The influence of solder composition on the impact strength of lead-free solder ball grid array joints. Microelectronics Reliability, 51 3: 657-667. doi:10.1016/j.microrel.2010.10.012


Author Tsukamoto, H.
Nishimura, T.
Suenaga, S.
McDonald, S. D.
Sweatman, K. W.
Nogita, K.
Title The influence of solder composition on the impact strength of lead-free solder ball grid array joints
Journal name Microelectronics Reliability   Check publisher's open access policy
ISSN 0026-2714
1872-941X
Publication date 2011-03
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.microrel.2010.10.012
Volume 51
Issue 3
Start page 657
End page 667
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2012
Language eng
Abstract This study aims to investigate the shear and tensile impact strength of solder ball attachments. Tests were conducted on Ni-doped and non-Ni-doped Sn–0.7wt.% Cu, Sn–37wt.% Pb and Sn–3.0wt.% Ag–0.7wt.% Cu solder ball grid arrays (BGAs) placed on Cu substrates, which were as-reflowed and aged, over a wide range of displacement rates from 10 to 4000 mm/s in shear and from 1 to 400 mm/s in tensile tests. Ni additions to the Sn–0.7wt.% Cu solders has slowed the growth of the interface intermetallic compounds (IMCs) and made the IMC layer morphology smooth. As-reflowed Ni-doped Sn–0.7wt.% Cu BGA joints show superior properties at high speed shear and tensile impacts compared to the non-Ni-doped Sn–0.7wt.% Cu and Sn–3.0wt.% Ag–0.7wt.% Cu BGAs. Sn–3.0wt.% Ag–0.7wt.% Cu BGAs exhibit the least resistance in both shear and tensile tests among the four compositions of solders, which may result from the cracks in the IMC layers introduced during the reflow processes.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 26 November 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
 
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Created: Wed, 13 Jun 2012, 21:06:45 EST by Dr Kazuhiro Nogita on behalf of School of Mechanical and Mining Engineering