Pushing Sputtered HfO2-Based Ferroelectrics toward BEOL Compatibility

Publikation: Beitrag in Buch/Konferenzbericht/Sammelband/GutachtenBeitrag in KonferenzbandBeigetragenBegutachtung

Beitragende

  • Xuetao Wang - , NaMLab - Nanoelectronic materials laboratory gGmbH (Autor:in)
  • Thomas Mikolajick - , Professur für Nanoelektronik, Technische Universität Dresden (Autor:in)
  • Matthias Grube - , NaMLab - Nanoelectronic materials laboratory gGmbH (Autor:in)

Abstract

In this work, we investigate the back-end-of-line (BEOL) compatibility of the TiN/Hf1-xZrxO2 (HZO)/TiN thin-film capacitors by exploiting the effect of sputtering power, ZrO2 content and process pressure. The variation of double remanent polarization (2Pr) suggests a crystal phase transformation in the HZO film when the sputtering power is altered. A change in the dielectric constant also supports this behavior. After tuning the process pressure, we could lower the required thermal budget for crystallization to 400°C, which is thermally compatible with BEOL processes. Moreover, the optimal sputtering parameters could reach 2Pr of 36 μC/cm2 with an endurance of up to 107 cycles. High 2Pr and good endurance achieved with low-Temperature annealing is a breakthrough for sputtered HfO2-based thin films and shows a promising future for integrating sputtered HZO into BEOL processes.

Details

OriginalspracheEnglisch
Titel2022 IEEE Nanotechnology Materials and Devices Conference (NMDC)
ErscheinungsortNanjing
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
Seiten21-24
Seitenumfang4
ISBN (elektronisch)978-1-7281-7410-5
ISBN (Print)978-1-7281-7411-2
PublikationsstatusVeröffentlicht - 2022
Peer-Review-StatusJa

Publikationsreihe

ReiheIEEE Nanotechnology Materials and Devices Conference (NMDC)

Konferenz

Titel17th IEEE Nanotechnology Materials and Devices Conference
KurztitelNMDC 2022
Veranstaltungsnummer17
Dauer18 - 20 November 2022
Webseite
BekanntheitsgradInternationale Veranstaltung
OrtZhenbao Holiday Hotel
StadtNanjing
LandChina

Externe IDs

ORCID /0000-0003-3814-0378/work/142256347

Schlagworte

Schlagwörter

  • BEOL, ferroelectric, HZO, power, pressure, sputtering