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Flat-band voltage shift in metal-gate/high-k/Si stacks

  • An Ping Huang*
  • , Xiao Hu Zheng
  • , Zhi Song Xiao
  • , Zhi Chao Yang
  • , Mei Wang
  • , K. Chu Paul
  • , Xiao Dong Yang
  • *Corresponding author for this work
  • Beihang University
  • City University of Hong Kong
  • University of Florida

Research output: Contribution to journalArticlepeer-review

Abstract

In metal-gate/high-k stacks adopted by the 45 nm technology node, the flat-band voltage (Vfb) shift remains one of the most critical challenges, particularly the flat-band voltage roll-off (Vfb roll-off) phenomenon in p-channel metal-oxide-semiconductor (pMOS) devices with an ultrathin oxide layer. In this paper, recent progress on the investigation of the Vfb shift and the origin of the Vfb roll-off in the metal-gate/high-k pMOS stacks are reviewed. Methods that can alleviate the Vfb shift phenomenon are summarized and the future research trend is described.

Original languageEnglish
Article number097303
JournalChinese Physics B
Volume20
Issue number9
DOIs
StatePublished - Sep 2011

Keywords

  • V roll-off
  • flat-band voltage shift
  • high-k dielectrics
  • metal gate

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