Impact of electromigration and isothermal ageing on lead-free solder joints of chip-sized SMD components

Straubinger, Dániel; Hurtony, Tamás; Géczy, Attila

doi:10.1016/j.jmrt.2022.09.048

Cited by 10 publications

(1 citation statement)

References 39 publications

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“…The local deterioration of heat removal from the contact can lead to its overheating, the occurrence of thermal stresses and, ultimately, to the destruction of the joint. D. Straubinger et al [ 13 ] demonstrated the reduction of shear strength in solder joints under current loading and isothermal aging. The formation of voids in the solder layer during the flow of current can also lead to the appearance and increase in the joint TR [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Thermal Wave Diagnostics of the Thermal Resistance of Soldered and Bonded Joints in Semiconductor Structures

Глазов

Muratikov

2023

Sensors

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This paper is a review of recent applications of a laser photothermal mirage technique for sensing and measuring the thermal resistance of joint layers in modern electronic devices. A straightforward theoretical model of the interfacial thermal resistance based on the formation of a thin intermediate layer between jointed solids is described. It was experimentally shown that thermal properties of solder layers cannot be evaluated simply on the base of averaging the thermal properties of solder components. The review presents the laser thermal wave methodology for measuring thermal parameters of soldered and adhesively bonded joints. The developed theoretical model makes it possible to carry out a quantitative estimation of local thermal conductivities of joints and their thermal resistances by fitting theoretical results with experimental data obtained by the laser beam deflection method. The joints made with lead-containing and lead-free solders were studied. The anomalous distribution of thermal properties in the solder layer is explained by the diffusion of various atoms detected by energy dispersive X-ray spectroscopy. The laser beam deflection method made it possible to reveal a strong influence of the surface pretreatment quality on the interfacial thermal resistance.

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Section: Introductionmentioning

confidence: 99%