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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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...
MOSFET01:16

MOSFET

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...
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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 current...

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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
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Published on: August 28, 2018

A CMOS neuroelectronic interface based on two-dimensional transistor arrays with monolithically-integrated circuitry.

C H Chang1, S R Chang, J S Lin

  • 1Institute of Electronics Engineering, National Tsing Hua University, HsinChu, Taiwan.

Biosensors & Bioelectronics
|October 28, 2008
PubMed
Summary

This study introduces a novel neuroelectronic interface using oxide-semiconductor field-effect transistors (OSFETs) for high-resolution neural recording and stimulation. The chip integrates signal processing, overcoming limitations of traditional microelectrode arrays for studying neuronal networks.

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In Vitro Multiparametric Cellular Analysis by Micro Organic Charge-modulated Field-effect Transistor Arrays

Published on: September 20, 2021

Area of Science:

  • Neuroscience
  • Materials Science
  • Electrical Engineering

Background:

  • Monitoring neural activity requires high spatiotemporal resolution.
  • Existing microelectrode arrays (MEAs) lack integrated signal processing, limiting electrode count and signal quality.
  • Routing complexity and noise degrade signal-to-noise ratio in conventional MEAs.

Purpose of the Study:

  • To present a single-chip neuroelectronic interface integrating oxide-semiconductor field-effect transistors (OSFETs) with signal-processing circuitry.
  • To demonstrate a fabrication process for large-scale field-effect biosensors with on-chip circuitry.
  • To evaluate the chip's capability in neural recording and stimulation.

Main Methods:

  • Fabrication of a single-chip neuroelectronic interface using a standard complementary-metal-oxide-semiconductor (CMOS) process.
  • Die-level etching of specific transistor polygates to form oxide-semiconductor field-effect transistors (OSFETs).
  • Experimental validation using the crayfish escape circuit for neural recording and stimulation.

Main Results:

  • Successfully fabricated and confirmed the reliability of OSFETs with a 7nm gate oxide.
  • Demonstrated extracellular recording and stimulation of neural activity via capacitive coupling.
  • OSFET-based interface showed comparable performance to conventional electrophysiological tools in studying neuronal networks.

Conclusions:

  • The developed OSFET-based neuroelectronic interface enables faithful study of neuronal networks.
  • The simple, die-level fabrication process facilitates large-scale development of field-effect biosensors with integrated circuitry.
  • This technology advances neuroelectronic interfaces for neuroscience research and biosensing applications.