Breakthroughs in Undoped HfO2 Ferroelectric Capacitors Achieved through Enhanced Nanocrystallite Seeding in As-Deposited Films via O2-Plasma ALD

  • Zongwei Shang
  • , Changqing Ye
  • , Hao Li
  • , Xing Wu
  • , Runsheng Wang
  • , Ming Li*
  • , Ru Huang
  • *Corresponding author for this work

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

Abstract

In this work, undoped HfO2 ferroelectric capacitors with excellent material properties are fabricated by O2plasma atomic layer deposition (ALD). Record high ferroelectric performance is demonstrated among all reported undoped HfO2 results, with high endurance (> 1011) and short switching time (< 2 ns). An average large single-crystal size (> 50 nm) and an orthorhombic phase ratio of over 40% are confirmed by transmission electron microscopy (TEM). Furthermore, the impacts of oxygen vacancy (VO) and H impurities concentration on the ferroelectric properties are elucidated.

Original languageEnglish
Title of host publication9th IEEE Electron Devices Technology and Manufacturing Conference
Subtitle of host publicationShaping the Future with Innovations in Devices and Manufacturing, EDTM 2025
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798331504168
DOIs
StatePublished - 2025
Event9th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2025 - Hong Kong, Hong Kong
Duration: 9 Mar 202512 Mar 2025

Publication series

Name9th IEEE Electron Devices Technology and Manufacturing Conference: Shaping the Future with Innovations in Devices and Manufacturing, EDTM 2025

Conference

Conference9th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2025
Country/TerritoryHong Kong
CityHong Kong
Period9/03/2512/03/25

Keywords

  • seed crystallite
  • ultra-fast speeds
  • undoped HfO

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