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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...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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...
Characteristics of MOSFET01:17

Characteristics of MOSFET

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 quicker...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...

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Recent patents in semiconductor nanocluster floating gate flash memory.

Jiyan Y Dai1, Pui-Fai Lee

  • 1Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. apdaijy@inet.polyu.edu.hk

Recent Patents on Nanotechnology
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Summary

Nanoclusters (NC) offer advanced memory solutions, providing nonvolatile, high-speed, and low-power storage. These devices exhibit superior performance and reliability compared to traditional memory technologies.

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Area of Science:

  • Materials Science and Engineering
  • Electrical Engineering
  • Nanotechnology

Background:

  • Nanoclusters (NC) are utilized as charge storage nodes in advanced memory devices.
  • Conventional floating gate memory uses poly-Si for charge storage, facing limitations in performance and power consumption.

Purpose of the Study:

  • To explore the advantages of nanocluster-based memory devices.
  • To review recent innovations in nanocluster memory structures and fabrication methods.

Main Methods:

  • Review of recent patents and literature on nanocluster memory.
  • Analysis of device physics, including quantum confinement and Coulomb blockade effects.

Main Results:

  • Nanocluster memory devices demonstrate lower operating voltage, higher endurance, and faster write-erase speeds.
  • These devices show improved immunity to soft errors compared to conventional floating gate memory.

Conclusions:

  • Nanocluster-based memory represents a significant advancement over traditional technologies.
  • Recent patents highlight innovative structures and fabrication techniques for enhanced nanocluster memory performance.