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US 8,476,818 B2Granted
Electron emitting element including a fine particle layer containing insulating particles, and devices and methods related thereto
AssigneeSharp Kabushiki Kaisha
InventorsHiroyuki Hirakawa, Ayae Nagaoka, Yasuo Imura, Tadashi Iwamatsu
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Abstract
An electron emitting element of the present invention includes an electron acceleration layer sandwiched between an electrode substrate and a thin-film electrode, and the electron acceleration layer includes a fine particle layer containing insulating fine particles and a basic dispersant. This makes it possible to provide an electron emitting element which does not cause insulation breakdown in an insulating layer and which can be produced at a low cost.
Claims13
An electron emitting element comprising:
- an electrode substrate and a thin-film electrode, which are provided so as to face each other;
- and
- an electron acceleration layer sandwiched between the electrode substrate and the thin-film electrode,
- the electron emitting element (i) accelerating electrons in the electron acceleration layer at a time when a voltage is applied between the electrode substrate and the thin-film electrode and (ii) emitting the electrons from the thin-film electrode,
- the electron acceleration layer including a fine particle layer containing insulating fine particles,
- the fine particle layer further containing a basic dispersant, wherein:
- the basic dispersant includes a polymeric material that disperses the insulating fine particles due to its steric repulsion effect, into which polymeric material an electron pair donor that donates a pair of electrons is introduced as a substituent.
4 more elements
A method for producing an electron emitting element that includes:
- an electrode substrate and a thin-film electrode, which are provided so as to face each other;
- and
- an electron acceleration layer provided between the electrode substrate and the thin-film electrode,
- the electron emitting element (i) accelerating electrons in the electron acceleration layer at a time when a voltage is applied between the electrode substrate and the thin-film electrode and (ii) emitting the electrons from the thin-film electrode,
- said method comprising the steps of:
- (a) forming a fine particle layer serving as the electron acceleration layer on the electrode substrate with the use of an insulating fine particle dispersion solution in which insulating fine particles are dispersed in a solvent by use of a basic dispersant;
- and
- (b) forming the thin-film electrode on the fine particle layer, wherein:
- the basic dispersant includes a polymeric material that disperses the insulating fine particles due to its steric repulsion effect, into which polymeric material an electron pair donor that donates a pair of electrons is introduced as a substituent.
6 more elements
Dependencies are inferred from the claim text.