Ductile-to-brittle transition in Sn-Zn solder joints measured by impact test

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Author(s)

  • M. Date
  • T. Shoji
  • M. Fujiyoshi
  • K. Sato
  • K. N. Tu

Detail(s)

Original languageEnglish
Pages (from-to)641-645
Journal / PublicationScripta Materialia
Volume51
Issue number7
Publication statusPublished - Oct 2004
Externally publishedYes

Link(s)

DOI

DOI
Check@CityULib
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-3142756580&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(4e055c27-811c-4af7-b2a4-5209a6cec20c).html

Abstract

Sn-9Zn and Sn-8Zn-3Bi solder balls were bonded to Cu or electroless Au/Ni(P) pads, and the effect of aging on impact reliability was investigated. A test similar to the classic Charpy impact test was performed to measure the impact toughness of the solder joints. In the case of the solder/Cu joints, γ-Cu5Zn88 at the bond interface thickened remarkably with the aging time, accompanied by void formation, resulting in a ductile-to-brittle transition of the joint. In the case of the solder/Au/Ni(P) joints, however, the slow dissolution and diffusion of Ni into the solders as well as the redeposition of Zn at the interface contributed to maintaining high impact toughness even after a prolonged aging. All of the bumps on the Au/Ni(P) broke in a ductile manner. © 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

  • Au-Zn intermetallic compound, Cu-Zn intermetallic compound, Ductile-to-brittle transition, Impact test, Sn-Zn solder

Bibliographic Note

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Publication fingerprints text

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Solder Joint Keyphrases
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Soldering Keyphrases
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Impact Test Keyphrases
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Ni-P Keyphrases
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Brittle-ductile Tra... Keyphrases
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Au-Ni Keyphrases
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Sn-Zn Solder Keyphrases
100
aging INIS
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impact tests INIS
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ductile-brittle tra... INIS
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Citation Format(s)

[ RIS ] [ BibTeX ]
Ductile-to-brittle transition in Sn-Zn solder joints measured by impact test. / Date, M.; Shoji, T.; Fujiyoshi, M. et al.
In: Scripta Materialia, Vol. 51, No. 7, 10.2004, p. 641-645.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review