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March 7, 2026Journal of Electronic PackagingOpen Access

Aging Effects on SAC305 Solder Joints: Correlating IMC Evolution, Hardness, and Drop-Shock Performance in ENIG and Immersion Tin Finishes

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Authors

SDSaddam DaradkehAAAbdallah AlakaylehSTSufyan Tahat

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Overview

Demonstrates how aging reduces drop-shock reliability in solder joints, highlighting material selection implications.

Key Points

  • The research investigates how aging impacts the drop-shock reliability and mechanical properties of SAC305 solder joints with different surface finishes.
  • Conducted tests on CABGA208 components mounted on PCBs with ENIG and Immersion Tin finishes.
  • Applied four isothermal aging conditions at 125 °C for varying durations.
  • Evaluated drop performance using peak accelerations of 1500G and pulse widths of 0.5 ms.
  • Performed microstructural analysis to assess IMC growth and its effects on reliability.
  • Aging significantly decreased drop-shock reliability due to thicker IMC layers causing cracks.
  • Immersion Tin samples showed better reliability compared to ENIG due to less brittle IMC formation.
  • Aging also led to reduced bulk solder hardness from the coarsening of Ag3Sn particles.

Cite This Study

Daradkeh et al. (2026) studied this question.

synapsesocial.com/papers/69abc2355af8044f7a4eb9f2https://doi.org/10.1115/1.4071328
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Also Consider

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  1. 1Aging Effect on IMC Evolution in Bi-Based and SAC Soldering Pastes on 3D-Shaped Aluminum Cores2026
  2. 2Interfacial Microstructure Evolution and High-Speed Ball Shear Fracture of SAC305/Cu-20wt%Zn Solder Joints Under Isothermal Aging2026
  3. 3Microstructural Evolution, Mechanical Properties, and Thermal Reliability of Bi- and Ni-Doped Sn-Ag-Based Lead-Free Solder Alloys2026 · 1 citations
  4. 4Micromechanical and microstructure evolution of leaded (SnPb) and lead-free (SAC305 and SnCu) mixed solder joints during isothermal aging2024 · 2 citations
  5. 5Effect of thermal aging on microstructure and mechanical properties of indium-doped Sn-Ag-Cu lead free solder alloys2026