Undercooling and microstructure analysis for the design of low melting point solder

Li Pu, Yongjun Huo, Xiuchen Zhao, K. N. Tu, Yingxia Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The undercooling in solidification of eutectic Sn37Pb, Sn3.5Ag, Sn58Bi and Sn52In solders was inspected. Sn37Pb and Sn58Bi have a similar undercooling, around 16°C, and Sn52In has the lowest undercooling of around 3°C. The larger the undercooling, the higher the barrier to nucleation. A small undercooling is favorable for solder joint array to solidify at the same time in chip stacking on a packaging substrate.

Original languageEnglish
Title of host publication2021 5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728181769
DOIs
Publication statusPublished - 8 Apr 2021
Event5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021 - Chengdu, China
Duration: 8 Apr 202111 Apr 2021

Publication series

Name2021 5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021

Conference

Conference5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021
Country/TerritoryChina
CityChengdu
Period8/04/2111/04/21

Keywords

  • Lead-free solder
  • electronic packaging
  • nucleation of phase transformations
  • undercooling

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