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Related Concept Videos

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...
Biasing of Metal-Semiconductor Junctions01:27

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Semiconductors

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Fermi Level Dynamics01:12

Fermi Level Dynamics

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MOSFET: Enhancement Mode01:22

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

Well-patterned metal-semiconductor interface improving contact conductance.

Jong-Lih Li1, Chieh-Hsiung Kuan, Ting-Wei Liao

  • 1Graduate Institute of Electronics Engineering and Department of Electrical Engineering, National Taiwan University, Taipei 106, Taiwan.

Journal of Nanoscience and Nanotechnology
|February 21, 2013
PubMed
Summary
This summary is machine-generated.

Improving aluminum/silicon contact conductance (Gc) is achieved by using patterned silicon with hole arrays. This method enhances Al crystallization and Gc significantly, offering a novel approach for nanoscale devices.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • The aluminum/silicon (Al/Si) system is crucial in semiconductor technology.
  • Improving contact conductance (Gc) is essential for device performance.
  • Existing methods like heavy doping or annealing have limitations.

Purpose of the Study:

  • To investigate a novel method for enhancing Gc in Al/Si systems.
  • To explore the effect of patterned silicon surfaces on Al crystallization and interface properties.
  • To develop a controlled approach for nanoscale Al/Si interfaces.

Main Methods:

  • Fabrication of silicon substrates with hole arrays using electron-beam lithography.
  • Deposition of aluminum and characterization of Al crystallization using Transmission Electron Microscopy (TEM).
  • Measurement of contact conductance (Gc) and analysis of the Al grain area ratio (Ac).

Main Results:

  • Gc improved from 0.004 microS to 13.390 microS with decreasing hole size.
  • Al crystallization was observed within and around the silicon holes.
  • The Al grain area ratio (Ac) increased from 0.007 to 0.359.
  • An experimental model showed Gc is proportional to Ac divided by the square of interfacial oxygen content.

Conclusions:

  • Electron-beam lithography patterned silicon with hole arrays significantly enhances Gc and Al crystallization in Al/Si systems.
  • The developed methodology provides a robust, controlled, and non-planar interface alternative for nanoscale devices.
  • This approach offers a viable alternative to traditional doping or annealing processes for Gc improvement.