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Shear strength analysis of ball grid array (BGA) solder interfaces

Shear strength analysis of ball grid array (BGA) solder interfaces

Alam, M. O., Lu, Hua, Bailey, Christopher, Chan, Y.C. and Wu, B.Y. (2007) Shear strength analysis of ball grid array (BGA) solder interfaces. In: Vaidyanathan, K., Tee, T.Y. and Lee, T.K., (eds.) 2007 9th Electronics Packaging Technology Conference. Electronics Packaging Technology Conference Proceedings . Institute of Electrical and Electronics Engineers, Inc., Piscataway, NJ, USA, pp. 770-773. ISBN 9781424413249 (doi:11.1109/EPTC.2007.4469797)

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Abstract

Ball shear test is the most common test method used to assess the reliability of bond strength for ball grid array (BGA) packages. In this work, a combined experimental and numerical study was carried out to realize of BGA solder interface strength. Solder mask defined bond pads on the BGA substrate were used for BGA ball bonding. Different bond pad metallizations and solder alloys were used. Solid state aging at 150degC up to 1000 h has been carried out to change the interfacial microstructure. Cross-sectional studies of the solder-to-bond pad interfaces was conducted by scanning electron microscopy (SEM) equipped with an energy dispersive X-ray (EDX) analyzer to investigate the interfacial reaction phenomena. Ball shear tests have been carried out to obtain the mechanical strength of the solder joints and to correlate shear behaviour with the interfacial reaction products. An attempt has been taken to realize experimental findings by Finite Element Analysis (FEA). It was found that intermetallic compound (IMC) formation at the solder interface plays an important role in the BGA solder bond strength. By changing the morphology and the microchemistry of IMCs, the fracture propagation path could be changed and hence, reliability could be improved

Item Type: Book Section
Additional Information: This paper forms part of the published proceedings from 9th Electronics Packaging Technology Conference, held 10-12 Dec 2007, Singapore.
Uncontrolled Keywords: ball shear test, bond strength, ball grid array (BGA), solder interface strength, Finite Element Analysis(FEA), intermetallic compound (IMC), fracture propogation path, interfacial reaction phenomena,
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Mechanics & Reliability Group
School of Computing & Mathematical Sciences > Department of Computer Systems Technology
School of Computing & Mathematical Sciences > Department of Mathematical Sciences
Related URLs:
Last Modified: 14 Oct 2016 09:03
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/1159

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