Comparative study of tin lead and lead free solder joint interface

Kar, Abhijit and Ghosh, M and Ghosh, R N and Ray, Ajoy K (2007) Comparative study of tin lead and lead free solder joint interface. In: 2 nd International Conference on Recent Advances in Composite Materials (ICRACM-2007), February, 20-23, 2007, New Delhi.



Pure Cu-(Sn37Pb) and Cu-(Sn3.5Ag0.5Cu) soldered interface has been characterized by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) fitted with EDX. TEM analysis of the interface confirms the presence of different intermetallic compounds (IMCs) in the interface, such as  (Cu 6 Sn 5 ),  (Cu 3 Sn) and Ag 3 Sn phases. Microstructural observations are correlated with the electrical and mechanical properties of the joints. (Lead free solder)-Cu joint exhibits better electrical conductivity (0.28x10 6 ohm-1cm-1) and mechanical strength ~68MPa compare to the conventional (lead-tin solder)-Cu joint which exhibits electrical conductivity and mechanical strength as 0.22x10 6 ohm-1cm-1 and ~55MPa respectively.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:Lead free solder, interface, TEM, electrical conductivity, IMC.
Divisions:Material Science and Technology
ID Code:5685
Deposited By:Dr. A K Sahu
Deposited On:04 Jul 2012 10:10
Last Modified:04 Jul 2012 10:10
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