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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

757
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
757

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CMOS-compatible Hf0.5Zr0.5O2-based ferroelectric memory crosspoints fabricated with damascene process.

Dorian Coffineau1,2, Nicolas Gariépy1,2, Benoit Manchon1,2,3

  • 1Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, J1K 0A5 Sherbrooke, Québec, Canada.

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Summary
This summary is machine-generated.

Hafnium Zirconium Oxide (HFO2) ferroelectric memory crosspoints show improved endurance and faster switching speeds. These complementary metal-oxide-semiconductor-compatible devices offer significant advantages for next-generation memory applications.

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BEOL compatibleHf0.5Zr0.5O2damasceneferroelectrics

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Solid State Physics

Background:

  • Ferroelectric materials are crucial for non-volatile memory.
  • Hafnium Zirconium Oxide (HZO) is a promising ferroelectric material for advanced memory devices.
  • Complementary Metal-Oxide-Semiconductor (CMOS) compatibility is essential for large-scale integration.

Purpose of the Study:

  • To fabricate and characterize Hf0.5Zr0.5O2 (HZO) based ferroelectric memory crosspoints using a CMOS-compatible damascene process.
  • To compare the performance of scaled crosspoint devices with larger benchmark devices.
  • To investigate the endurance and switching speed of these novel memory structures.

Main Methods:

  • Fabrication of HZO ferroelectric memory crosspoints via a CMOS-compatible damascene process.
  • Plasma-enhanced atomic layer deposition (PEALD) of a 9 nm thick HZO ferroelectric thin film.
  • Electrical characterization including endurance testing and switching time measurements.

Main Results:

  • Crosspoint devices exhibited an order of magnitude improvement in endurance compared to benchmark devices.
  • Switching times for scaled crosspoints were <170 ns, significantly faster than larger devices.
  • All devices achieved a remnant polarization (2Pr) of ~50 µC cm-2 after 10^5 cycles.

Conclusions:

  • Downscaled HZO ferroelectric memory crosspoints demonstrate superior endurance and switching speed.
  • The CMOS-compatible damascene process enables high-performance ferroelectric memory fabrication.
  • These findings highlight the potential of HZO crosspoints for advanced memory technologies.