Abstract:
A carbon film (101) having an area of insulating material surrounded by an area of conducting material, and an area of material between the insulating material and the area of conducting material having a graded dielectric constant which varies from high to low from the area of insulating material to the area of conducting material.
Abstract:
A novel use of doped carbonaceous material is disclosed, integral to the operation of Vacuum Diode Heat Pumps and Vacuum Diode Thermionic Generators. In the preferred embodiment, the use of nitrogen-doped diamond enhances the operation of Vacuum Diode Heat Pumps and Vacuum Diode Thermionic Generators.
Abstract:
A film (carbon and/or diamond) for a field emitter device, which may be utilized within a computer display, is produced by a process utilizing etching of a substrate (704) and then depositing the film (705). The etching step creates nucleation sites on the substrate for the film deposition process. With this process patterning of the emitting film is avoided. A field emitter device can be manufactured with such a film. A field emission device results where the cathod has a continuous film that has not been subjected to etching, and thus has superior emission properties. A pixel in the cathode includes the emitting film deposited directly on the substrate with the conductor deposited on one or more sides of the emitter film. In one embodiment the emitter is in a window formed in the conductor layer.
Abstract:
A diamond grit surface is formed on a substrate (1) having a metal surface (2), such as of nickel, by applying a paste (4) of low-grade diamond grit in a binder to the surface. After driving off the binder, the diamond coated surface is placed in a reactor chamber (10) having a microwave plasma reactor (11) and connected to a hydrogen gas pump (12). The substrate (1) is heated in the hydrogen atmosphere at a reduced pressure. The metal surface (2) acts as a catalyst in the presence of the hydrogen plasma to cause regrowth of the diamond (6), giving an improved size, shape and adhesion. The method may be used to make diamond surfaces in electron emitter devices, circuit boards or abrasive devices.
Abstract:
An electron emitting device which efficiently emits electrons by supplying electrons to a p-type diamond layer (13) from an electron supplying layer (12) by impressing a forward bias upon MIS, p-n, and pin structures using diamond layers. In the production process of the electron emitting device, a continuous diamond layer (13) is formed by a vapor synthesizing method and the thickness of the diamond layer is adjusted to a prescribed value by etching. In order to arbitrarily control the electron affinity of the surface of the diamond layer (13), the surface is exposed to vacuum ultraviolet rays, or hydrogen or oxygen plasma.
Abstract:
Diamond powders prepared by shock synthesis are useful as electron field emitters. Field emitting cathodes made up of such diamond powders 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:
A method for creating controlled field emission sites in the surface of carbon films or carbon-based materials is provided. A laser beam is used to impinge upon the surface at sites from which emssion is desired, the duration of exposure of each site adjusted to each site provides the desired emission intensity. Electron emitters made according to the invention are useful in flat panel displays and other applications using electron emitters.
Abstract:
In one electron-emitting device, non-insulating particle bonding material (24) securely bonds electron-emissive carbon-containing particles (22) to an underlying non-insulating region (12). The carbon in each carbon-containing particle is in the form of diamond, graphite, amorphous carbon, or/and silicon carbide. In another electron-emitting device, electron-emissive pillars (22/28) overlie a non-insulating region (12). Each pillar is formed with an electron-emissive particle (22) and an underlying non-conductive pedestal (28). Various techniques, including use of electron-emissive particles as etch masks in the case of the pillared electron emitter, are employed in fabricating the electron emitters.
Abstract:
A method is provided for fabricating a display cathode which includes forming a conductive line adjacent a face of a substrate. A region of amorphic diamond is formed adjacent a selected portion of the conductive line. The figure is an enlarged exploded cross-sectional view of a diode display unit (10) which includes two primary components: cathode plate (12) and anode plate (14). A vacuum is maintained between the plates by a seal (16). Regularly spaced pillars (26) separate cathode plate (12) and anode plate (14). A plurality of low effective work-function emitter areas (24) are formed by respective layers of amorphic diamond along conductive lines (20) disposed on substrate (18). A layer (34) of photo-emitting material is formed along transparent conductive lines (30) which are disposed upon substrate (28). Enlarge pads or leads (32) allow connection to an external signal source.