Double-gate Si junction-less n-type transistor for high performance Cu-BEOL compatible applications using 3D sequential integration

  • A. Vandooren
  • , L. Witters
  • , E. Vecchio
  • , E. Kunnen
  • , G. Hellings
  • , L. Peng
  • , F. Inoue
  • , W. Li
  • , N. Waldron
  • , D. Mocuta
  • , N. Collaert

Research output: Chapter in Book/Report/Conference proceedingsChapterpeer-review

Abstract

We are proposing a double gate junction-less device with a processing temperature compatible with state-of-the-art dense low k dielectric back-end of line copper process. The thermal stability of the back-end of line process was studied, showing no degradation for an anneal temperature up to 500°C 1h. Using wafer bonding, a crystalline silicon layer can be transferred onto a carrier wafer followed by top device processing at low temperature with a gate first approach as well as direct W contacts with Ti/TiN barrier layer. To avoid dopant activation using high temperature anneal (spike), junction-less devices are used, where the uniform channel dopant implantation and activation can be done prior to the layer transfer.

Original languageEnglish
Title of host publication2017 IEEE SOI-3D-Subthreshold Microelectronics Unified Conference, S3S 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-2
Number of pages2
ISBN (Electronic)9781538637654
DOIs
Publication statusPublished - 2 Jul 2017
Externally publishedYes
Event2017 IEEE SOI-3D-Subthreshold Microelectronics Unified Conference, S3S 2017 - Burlingame, United States
Duration: 16 Oct 201718 Oct 2017

Publication series

Name2017 IEEE SOI-3D-Subthreshold Microelectronics Unified Conference, S3S 2017
Volume2018-March

Conference

Conference2017 IEEE SOI-3D-Subthreshold Microelectronics Unified Conference, S3S 2017
Country/TerritoryUnited States
CityBurlingame
Period16/10/1718/10/17

Keywords

  • Cu BEOL
  • junction-less devices
  • sequential 3D
  • wafer bonding

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