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Related Concept Videos

Biasing of FET01:22

Biasing of FET

209
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
209
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

270
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
270
Field Effect Transistor01:29

Field Effect Transistor

286
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
286
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

202
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
202
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

308
Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
308
MOSFET01:16

MOSFET

411
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
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Related Experiment Video

Updated: May 29, 2025

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
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Nonvolatile Reconfigurable Transistor via Ferroelectrically Induced Current Modulation.

Daniele Nazzari1, Lukas Wind1, Masiar Sistani1

  • 1Institute of Solid State Electronics, Technische Universität Wien, Gußhausstraße 25-25a, 1040 Vienna, Austria.

ACS Applied Materials & Interfaces
|February 6, 2025
PubMed
Summary
This summary is machine-generated.

New reconfigurable field-effect transistors (RFETs) integrated with ferroelectric hafnium zirconium oxide (HZO) enable logic-in-memory (LiM) hardware. This innovation supports low-power artificial neural network (ANN) execution with embedded self-learning capabilities.

Keywords:
Charge injection modulationFerroelectric Hf0.5Zr0.5O2 (HZO)Logic in Memory (LiM)Multilevel operationNonvolatile reconfigurabilityReconfigurable Field Effect Transistor (RFET)

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Area of Science:

  • Materials Science
  • Semiconductor Device Physics
  • Computer Engineering

Background:

  • Logic-in-memory (LiM) architectures promise energy-efficient execution of self-learning algorithms like artificial neural networks (ANNs).
  • Reconfigurable field-effect transistors (RFETs) offer versatile, run-time reconfigurable logic, ideal for advanced computing.
  • Integrating memory elements into RFETs is crucial for developing LiM hardware with embedded learning.

Purpose of the Study:

  • To investigate the integration of ferroelectric hafnium zirconium oxide (HZO) with dual top-gated RFETs.
  • To demonstrate HZO's capability to modulate Schottky barrier heights and control carrier injection in RFETs.
  • To explore the potential of HZO-based RFETs as building blocks for nonvolatile LiM hardware.

Main Methods:

  • Fabrication of dual top-gated RFETs incorporating a ferroelectric Hf0.5Zr0.5O2 (HZO) layer.
  • Electrical characterization to analyze the effect of HZO polarization on Schottky barrier heights and carrier transport.
  • Modulation of transistor operating modes (p-type to n-type) and current levels using polarization pulse height.

Main Results:

  • Successful integration of HZO onto dual top-gated RFETs.
  • Demonstration that HZO polarization effectively tunes Schottky barrier heights, influencing carrier injection.
  • Achieved switching between p-type and n-type transport, with modulation strength dependent on polarization pulse height.
  • Exhibited good retention of various device states due to HZO polarization stability.

Conclusions:

  • Ferroelectric HZO can modulate carrier injection across Schottky barriers in RFET devices.
  • This HZO-RFET approach enables the realization of nonvolatile logic-in-memory hardware.
  • The developed devices serve as ideal building blocks for low-power circuits designed for ANN execution.