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Investigations on Microstructure and Mechanical Properties of the Cu/Pb-free Solder Joint Interfaces

Investigations on Microstructure and Mechanical Properties of the Cu/Pb-free Solder Joint Interfaces by Qingke Zhang
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This thesispresents a series of mechanical test methods and comprehensively investigatesthe deformation and damage behavior of Cu/Pb-free solder joints under differentloading conditions. The fracture behavior of Pb-free joint interfaces inducedby stress, deformation of solder and substrate are shown, the shear fracturestrength of the Cu6Sn5 IMC is measured experimentally for the first time, andthe dynamic damage process and microstructure evolution behavior of Pb-freesolder joints are revealed intuitively. The thesis puts forward the argumentthat the local cumulative damage is the major cause of failure in solderjoints. The research results provide the experimental and theoretical basis forimproving the reliability of solder joints.

Springer Berlin Heidelberg; October 2015
153 pages; ISBN 9783662488232
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Title: Investigations on Microstructure and Mechanical Properties of the Cu/Pb-free Solder Joint Interfaces
Author: Qingke Zhang
 
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