Abstract:
Flächige Elektronen-Feldemissionsquelle, insbesondere für den Einsatz in flachen Bildschirmen, wobei selbige eine aktive Schicht reduzierter Dichte aufweist, deren Basismaterial ein hochschmelzendes Metall mit einem Schmelzpunkt oberhalb 1800 K ist und deren Dichte im Vergleich zum kristallinen Volumenmaterial des hochschmelzenden Metalls um mindestens 20 % reduziert ist, oder selbige eine aktive Schicht reduzierter Dichte aufweist, deren Basismaterial ein Gemisch verschiedener Metalle ist, von denen mindestens eines ein hochschmelzendes Metall mit einem Schmelzpunkt oberhalb 1800 K ist, und die Dichte der aktiven Schicht im Vergleich zum kompakten Gemisch der kristallinen Volumenmaterialien gleicher Zusammensetzung wie das Basismaterial um mindestens 20 % reduziert ist.
Abstract:
Annealed carbon soot is useful as an electron field emitter. Field emitting cathodes made up of annealed carbon soot attached to the surface of a substrate are also provided. The field emitters and field emitter cathodes are useful in vacuum electronic devices, flat panel computer and television displays, emission gate amplifiers, klystrons and lighting devices.
Abstract:
Carbon cone and carbon whisker field emitters are disclosed. These field emitters find particular usefulness in field emitter cathodes and display panels utilizing said cathodes. The carbon cone and carbon whisker field emitters can be formed by ion beam bombardment (e.g., ion beam etching) of carbon materials (e.g., bulk carbon, carbon films or carbon fibers).
Abstract:
A multi type electron emission element comprises a plurality of electrodes formed on a deposition surface of an insulating material and each having a conical portion of a single crystal, an insulating layer formed on the deposition surface and having openings respectively centered on the conical portions, and a deriving electrodes, part of which is formed near at least the conical portions, the deriving electrode being formed on the insulating layer.
Abstract:
A carbon-based material for electron emission sources, electron emission sources (150) containing the carbon-based material, an electron emission device including the electron emission sources (150), and a method of preparing the electron emission sources are provided. The carbon-based material has at least one characteristic selected from the group consisting of a ratio of h2 to h1 (h2/h1) 1.2, where h2 denotes the relative intensity of a second peak which is a peak in a Raman shift range of 1350±20 cm - 1, and h1 denotes the relative intensity of a first peak which is a peak in a Raman shift range of 1580±20 cm -1 in the Raman spectrum obtained by the radiation of a laser beam having a wavelength of 488±10 nm, 514.5±10 nm, 633±10 nm or 785±10 nm, FWHM2 denotes the full width at half maximum of the second peak, and FWHM1 denotes the full width at half maximum of the first peak. The electron emission sources (150) containing the carbon-based material have long lifespan and a high current density.
Abstract:
An electron emission source includes a carbon-based material and a resultant material formed by curing and heat treating at least one silicon-based material represented by formula (1), (2), and/or (3) below:
where R 1 through R 22 are each independently a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 1 -C 20 alkenyl group, a halogen atom, a hydroxyl group or a mercapto group, and m and n are each integers from 0 to 1,000. An electron emission device and an electron emission display device include the electron emission source. A composition for forming electron emission sources includes the carbon-based material and the silicon-based material. A method of forming the electron emission source includes applying the composition to a substrate; and heat treating the applied composition. The adhesion between the electron emission source including the cured and heat treated resultant material of the silicon-based material and a substrate is excellent, and thus the reliability of the electron emission device including the cured and heat treated resultant material of the silicon-based material can be enhanced.
Abstract:
A method for preparing an sp bonding boron nitride film exhibits excellent electric field electron emission characteristics which comprises introducing a reaction gas containing a boron source and a nitrogen source into a reaction vessel, adjusting the temperature of a substrate to the range of room temperature to 1300°C, and irradiating the substrate with an ultraviolet light with or without the generation of a plasma, to thereby form a surface structure excellent in electric field electron emission characteristics on the substrate by a reaction from the vapor phase in a self-forming manner. The film prepared by the above method is a material which, in addition to the above characteristics, has high resistance to electric field strength, can emit electrons with a great current density, and is free from the deterioration thereof.