Effect of Natural Ageing on the Mechanical Properties of the Soldered Joint Used in the Electronics Industry
- 1 January 1989
- journal article
- Published by Emerald Publishing in Soldering & Surface Mount Technology
- Vol. 1 (1) , 43-46
- https://doi.org/10.1108/eb037662
Abstract
Joints made to the Surface Mount configuration for a chip capacitor using either 60Sn40Pb or 62Sn36Pb2Ag solders were found to weaken substantially during storage at room temperature. This loss in joint strength is attributed to microstructural changes in the solder, particularly precipitation of the β phase and recrystallisation of the matrix, i.e., the two solid solutions (α + β), and the subsequent coarsening of the microstructure.Keywords
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