A novel electron emitter utilizing the characteristics of ferroelectric ceramic materials has been developed. The electronemitting portion of the electron emitter has a unique microstructure that has a vacuum gap between the upper electrode and the surface of the ferroelectric layer. We confirmed electron emission by a three-step process that consists of (the first step) electron charge, (the second step) charge retention, and (the third step) electron emission. The asymmetric property of ferroelectric hysteresis in the process indicates the following results. In the first step, an electron charge is performed in synchrony with the polarization reversal of the ferroelectric layer. On the other hand, in the third step, the electric field in the vacuum gap advances the electron emission while the polarization reversal is performed in the ferroelectric layer.

A novel micro structure of electron emitting portion has been developed for Field Effect -Ferroelectric Electron Emitter. This micro structure has numerous electron emitting micro-holes in high density. We have successfully improved luminance efficiency and emission angle dispersion by this micro structure.

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A novel electron emitter with the characteristics of ferroelectric ceramic materials has been developed. The electron-emitting portion of the electron emitter has vacuum gaps between the upper electrode and the surface of the ferroelectric layer. We confirmed that there are two types of electron emission from the electron emitter. One is considered to be the emission of the electron charge from the ferroelectric surface during a positive polarization reversal. In this paper, the characteristics and mechanism of the other type of electron emission are discussed which is expected to have high efficiency. We consider that field emission occurs as induced by the electric field concentrated in the vacuum gap transiently during a negative polarization reversal. A suitable electric conductivity of the ferroelectric surface is considered to be required for electron emission.