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Microstructure of Sn-Ag-Cu Pb-free solder

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2017, 27(2), pp.94~98
  • DOI : 10.6111/JKCGCT.2017.27.2.094
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Published : April 30, 2017

Jung-Il Lee 1,  LeeHoJun 1,  YoHan Yoon 1,  leejuyeon 1,  Hyun Su Cho 1,  Hyun Cho 2,  Jeong Ho Ryu 1

1한국교통대학교
2부산대학교

Accredited

ABSTRACT

In the past few years, Sn-3.0Ag-0.5Cu (weight%) solder composition has been a representative material to electronic industries as a replacement of Pb-base solder alloy. Therefore, extensive studies on process and/or reliability related with the composition have been reported. However, recent rapid rise in Ag price has demanded solder compositions of low Ag content. In this study, Sn-3.0Ag-0.5Cu solder bar sample was fabricated by melting of Sn, Ag and Cu metal powders. Crystal structure and element concentration were analyzed by XRD, optical microscope, FE-SEM and EDS. The Sn-3.0Ag-0.5Cu solder sample was composed of β-Sn, ε-Ag3Sn and η-Cu6Sn5 phases.

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