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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

718
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...
718
Biasing of FET01:22

Biasing of FET

410
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...
410
MOSFET01:16

MOSFET

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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...
708
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

542
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...
542
Characteristics of MOSFET01:17

Characteristics of MOSFET

584
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
584
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

540
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...
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Updated: Oct 26, 2025

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Ferroelectric field-effect transistors based on HfO2: a review.

Halid Mulaosmanovic1, Evelyn T Breyer1, Stefan Dünkel2

  • 1NaMLab gGmbH, 01187 Dresden, Germany.

Nanotechnology
|July 28, 2021
PubMed
Summary

Ferroelectric field-effect transistors (FeFETs) using hafnium oxide are advancing rapidly for nonvolatile memory. This review covers their principles, performance, and emerging applications in computing and RF devices.

Keywords:
ferroelectric FET (FeFET)ferroelectric field-effect transistorferroelectric hafnium oxideferroelectric memoryferroelectric switchingnonvolatile memorysolid-state memory

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Area of Science:

  • Solid State Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Ferroelectric field-effect transistors (FeFETs) are emerging nonvolatile memory devices.
  • Hafnium oxide (HfO2) has become a leading material for FeFETs.
  • A decade of research has significantly advanced FeFET technology.

Purpose of the Study:

  • To review the progress of hafnium oxide-based FeFETs.
  • To analyze their application in nonvolatile memory.
  • To survey alternative applications like neuromorphic computing.

Main Methods:

  • Review of recent scientific literature on FeFETs.
  • Analysis of device operation principles and switching mechanisms.
  • Evaluation of material properties and array structures.

Main Results:

  • Detailed discussion of FeFET operation, materials, and array designs.
  • Analysis of key performance metrics: endurance, retention, memory window, multi-level operation, and scaling.
  • Survey of FeFETs in neuromorphic computing, in-memory computing, and RF devices.

Conclusions:

  • Hafnium oxide FeFETs show significant promise for nonvolatile memory.
  • Ongoing research is expanding FeFET applications beyond traditional memory roles.
  • FeFET technology continues to evolve with advancements in materials and device design.