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The study of the growth behavior of Cu6Sn5 intermetallic compound in Cu/Sn/Cu interconnection system during the ultrasonic-assisted transient liquid phase soldering

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

Abstract

In this paper, the growth behavior of Cu6Sn5 intermetallic compound in Cu/Sn/Cu interconnection system during the ultrasonic-assisted transient liquid phase soldering were investigated under various ultrasonic bonding time. Asymmetrical growth of the interfacial Cu6Sn5 was observed in the Cu/Sn/Cu solder joints, i.e., the Cu6Sn5 near the side of cavitation erosion grew randomly, while the Cu6Sn5 near the opposite side grew in layer type. The asymmetrical growth can be wholly ascribed to the asymmetrical ultrasonic effects across the entire Sn interlayer. The asymmetrical ultrasonic effects resulted in different conditions for the nucleation and growth behavior of Cu6Sn5 on the upper and lower Cu/Sn interfaces. The microstructure and mechanical properties of the resulted full intermetallic joint were also investigated.

Original languageEnglish
Title of host publication18th International Conference on Electronic Packaging Technology, ICEPT 2017
EditorsChenxi Wang, Yanhong Tian, Tianchun Ye
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages10-13
Number of pages4
ISBN (Electronic)9781538629727
DOIs
StatePublished - 19 Sep 2017
Event18th International Conference on Electronic Packaging Technology, ICEPT 2017 - Harbin, China
Duration: 16 Aug 201719 Aug 2017

Publication series

Name18th International Conference on Electronic Packaging Technology, ICEPT 2017

Conference

Conference18th International Conference on Electronic Packaging Technology, ICEPT 2017
Country/TerritoryChina
CityHarbin
Period16/08/1719/08/17

Keywords

  • Intermetallic compound
  • Mechanical properties
  • TLP soldering
  • Ultrasonic waves

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