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Effects of side reservoirs on the electromigration lifetime of copper interconnects

  • Hendro Mario*
  • , Chee Lip Gan
  • , Yeow Kheng Lim
  • , Juan Boon Tan
  • , Jun Wei
  • , Tongjai Chookajorn
  • , Carl V. Thompson
  • *Corresponding author for this work
  • Nanyang Technological University
  • Global Foundries, Inc.
  • Agency for Science, Technology and Research, Singapore
  • Massachusetts Institute of Technology

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

Abstract

A new side reservoir test structure is shown to have improved electromigration reliability over conventional end-of-line reservoir structures. This is believed to be due to the ability of the side reservoir to "trap" migrating pre-existing voids before they reach the cathode end. The ability of the side reservoir to 'trap' pre-existing voids is believed to be associated with local differences in back-stresses and with the differing adhesion strength of Cu atoms with the Ta/Cu and SiN-SiCN/Cu interfaces.

Original languageEnglish
Title of host publication18th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2011
DOIs
StatePublished - 2011
Externally publishedYes
Event18th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2011 - Incheon, Korea, Republic of
Duration: 4 Jul 20117 Jul 2011

Publication series

NameProceedings of the International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA

Conference

Conference18th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2011
Country/TerritoryKorea, Republic of
CityIncheon
Period4/07/117/07/11

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