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Physics | Field Emission in Vacuum Microelectronics

Field Emission in Vacuum Microelectronics

Series: Microdevices

Fursey, George N.

2005, XV, 205 p.

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Field emission is a phenomenon described by quantum mechanics. Its emission capability is millions times higher than that of any other known types of electron emission. Nowadays this phenomenon is experiencing a new life due to wonderful applications in the atomic resolution microscopy, in electronic holography, and in the vacuum micro- and nanoelectronics in general. The main field emission properties, and some most remarkable experimental facts and applications, are described in this book.

Content Level » Research

Keywords » Experiment - Potential - electrons - mechanics - quantum mechanics

Related subjects » Electronics & Electrical Engineering - Optical & Electronic Materials - Physics

Table of contents 

Foreword. Historical Overview. 1: Field emission from metals. 1.1. Fowler-Nordheim theory. 1.2. Thermal-field emission. 1.3. Elaboration theory of the field emission theory from metals. 1.4. Resume. 2: Characteristic features of field emission in very high electric fields and high current densities. 2.1. Deviations from the Fowler-Nordheim theory in very high electric fields. 2.2. Space charge influence on field emission. 2.3. Influence of space charge of relativity electrons on field emission. 2.4. About the potential barrier shape in strong electric fields. 2.5. Resume. 3: Maximum obtainable field emission current densities. 3.1. Theoretical limit of field emission current. 3.2. Effects preceding field emitter explosion. 3.3. Heating as the cause of field emission cathode instabilities. 3.5. Highest field emission current densities achieved experimentally. 3.6. Resume. 4: Field emission in a microwave field. 4.1. Introduction. 4.2. The condition of adiabaticity - tunneling time. 4.3. Experimental verification of the validity of fn theory in a microwave field. 4.4. Maximum field emission current densities for a microwave field. 4.5. Elimination of the ion bombardment. 4.6. Transit time in a microwave field diode with field emission cathode. Energy spectra of electrons. 4.7. Field emission from a liquid surface in a microwave field. 4.8. Resume. 5: Field emission from semiconductors. 5.1. Introduction. 5.2. Cleaning the emitter surface and obtaining field-emission patterns. 5.3. Experimental field emission current-voltage characteristics. 5.4. On preserving the initial surface properties of a field emitter. 5.5. Voltage drop across the sample and the field distribution in the emitting tip area. 5.6. Theory of the field electron emission from semiconductors. 5.7. Transition processes in field emission from semiconductors. 5.8. Stable semiconductor field emission cathode. 5.9. Some experiments on adsorption. 5.10. Resume. 6: Statistical processes in field electron emission. 6.1. Formulation of the problem. 6.2. Method of investigation. 6.3. Statistics of field emission from metals. 6.4. Investigation of field emission statistics at cryogenic temperatures. 6.5. Multi-electron field emission from high temperature superconductors ceramics. 6.6. Investigations of field emission statistics for highly transparent barriers. 6.7. Resume. 7: The use of point field-emission cathodes in electron-optical systems: field emission localization to small solid angles. 7.1. Introduction. 7.2. The optimum crystallographic orientation of the field emission cathode. 7.3. Field emission localization by thermal-field surface self diffusion. 7.4. Field emission localization due to a local decrease of work function by selective adsorption. 7.5. Field emission from atomically sharp protuberances. 7.6. Some applications of field-emission cathodes in electron-optical devices. 7.7. Resume. 8: Advance in Applications. 8.1.

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