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Electron-Emission and Flat-Panel Displays

  • James F. Scott
Part of the Springer Series in Advanced Microelectronics book series (MICROELECTR., volume 3)

Abstract

When ferroelectrics are subjected to applied electric fields sufficiently large to switch their domains, electrons are emitted from their surfaces [495, 496]. This process is related to the Barkhausen effect, in which the annihilation of two colliding charged 180° domains liberates free charge [497]. Although regarded as a novelty for academic laboratories for many years, more recent work by Gundel et al. [498, 499] has shown that this emission can be synchronized to very fast rise-time electric pulses (ns) and therefore provide a useful pulsed electron source for accelerators. Because of the very short pulse widths, Gundel has achieved very large current densities (of order 1 A/cm2), as shown in Figs. 15.1 and 15.2, using a rather simple structure (Fig. 15.3) with 200 micron grids.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • James F. Scott
    • 1
  1. 1.Centre for Ferroics, Earth Sciences Dept.Cambridge UniversityCambridgeEngland

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