Solder Joint Fractures

 

These images show the various types of fractures affecting solder joints in electronic assemblies, which includes mechanical overload failures, thermal fatigue due to coefficient of thermal expansion (CTE) mismatches, gold embrittlement, creep rupture failures, and vibration fatigue fractures. Understanding these failure modes is crucial for enhancing the reliability and performance of electronic components.

 

SJF1 – Alloy 42 lead, single sided through-hole solder joint, mechanical overload failure.
SJF_2 – 1W SMT resistor, thermal fatigue failure, re: CTE mismatch strain.
SJF_3 – J-lead SMD, alumina substrate, CTE mismatch, gold embrittlement, thermal fatigue.
SJF_4 – cyclic thermal stress, CTE mismatch stress, thermal fatigue.

 

SJF_5 – SMT connector, creep rupture failure.
SJF_6 – QFN device, creep rupture failure, thermal warpage.
SJF_7 – SMT connector, creep rupture failure.
SJF_8 – vibration fatigue fracture at the lead/solder interface, QFP device .

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