Ball impact behavior of Sn-Cu (-Ni) lead-free solder joints

H. Tsukamoto, T. Nishimura, S. Suenaga, S. D. McDonald, J. Read, K. Nogita

研究成果: Contribution to journalArticle査読


Recent environmental and health concerns regarding the toxicity of lead have facilitated the development of lead-free solder alloys with suitable soldering characteristics and mechanical properties. Compared to the lead-containing solders, however, the lead-free solders are stiffer and less deformable during dynamic loading. In the present study, the shear and pull ball tests were employed to evaluate the impact strength of solder ball attachments. Tests were conducted on as-reflowed and aged Ni-doped and non-Ni-doped Sn-Cu solder ball grid arrays (BGAs) placed on Cu substrates over a wide range of displacement rates. Trace Ni addition to the Sn-Cu solders prevented the growth of the interface intermetallic compounds (IMCs) and made the IMC layer morphology smooth. As-reflowed Sn-Cu-Ni BGA joints show superior properties in high speed shear and pull impact tests.

ジャーナルMaterials Forum
出版ステータス出版済み - 2008

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 機械工学
  • 材料力学


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