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June 17, 2026Applied SciencesOpen Access

Aging Effect on IMC Evolution in Bi-Based and SAC Soldering Pastes on 3D-Shaped Aluminum Cores

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Authors

ACAneta ChołajTele & Radio Research InstituteMKMarek KościelskiTele & Radio Research InstituteISIzabela SpocińskaNational Institute of Telecommunications

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Implication

Randomized trial investigates intermetallic compounds in solder joints, suggesting distinct reliability for different solder alloys.

Key Points

  • This study examines how aging affects the evolution of intermetallic compounds (IMCs) in solder joints on 3D aluminum IMSs using different solder alloys.
  • Analyzed intermetallic compounds in solder joints with ENIG metallization under high-temperature, high-humidity, and thermal-shock conditions.
  • Measured IMC thickness evolution and performed microstructural and compositional analyses.
  • Focused on SAC305 and Sn42Bi57Ag1 solder alloys.
  • Aging significantly modifies IMC composition and morphology in both solder systems.
  • SAC305 joints showed the development of (Cu,Ni)6Sn5 phases as Cu content increased.
  • Sn42Bi57Ag1 joints displayed susceptibility to stress-assisted IMC growth, while SAC305 joints were more sensitive to environment-assisted degradation.

Cite This Study

Chołaj et al. (2026) studied this question.

synapsesocial.com/papers/6a323dd7d50b63ecad207417https://doi.org/10.3390/app16125962
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