Abstract:
L'invention concerne un procédé de réalisation d'une structure de cathode de type triode comprenant des étapes de dépôt et des étapes de gravure d'une couche de cathode pour la structurer en conducteurs de cathode ; d'une couche de grille pour la structurer en conducteurs de grille ; d'une couche d'isolant électrique et des conducteurs de grille jusqu'à atteindre une couche résistive pour fournir des cavités ; des conducteurs de cathode pour leur donner une structure ajourée au niveau de l'intersection des conducteurs de cathode et des conducteurs de grille. L'invention réside dans les étapes de gravure des conducteurs de grille et de la couche d'isolant électrique, qui s'effectuent par : a) dépôt d'une couche de résine sur la couche de grille, b) lithographie et développement de la couche de résine selon un motif pour obtenir des plots émissifs, c) gravure de la couche de grille, structurée en conducteurs de grille, selon le motif, d) gravure de la couche d'isolant sous-jacente à la couche de grille en élargissant la gravure au-delà des motifs de plots émissifs, e) gravure de la couche de grille au niveau des zones exposées par la gravure de la couche d'isolant jusqu'à atteindre la couche de résine, f) dépôt d'une couche de catalyseur dans les ouvertures de la couche de résine de manière à former les plots émissifs au fond des cavités, g) élimination de la couche de résine.
Abstract:
A field emission display having emitters controlled by an integrated driving circuit. The field emission display includes a charge shield positioned above exposed areas of the substrate to protect driving circuitry integrated into the substrate. The charge shield is a conductive layer within an insulative layer covering the driving circuit. The charge shield is connected to ground or to a low reference potential to bleed away current within the insulative layer, thereby preventing drifting charges from affecting the electrical response of the integrated driving circuit. The charge shield also terminates electric fields within the insulative layer to reduce the effect on the integrated driving circuit of dynamic variations in surface charge. Electrical characteristics of the driving circuit thus remain constant, reducing variations in the current supplied to the emitters, thereby reducing variations in the intensity of light emitted by the display.
Abstract:
Titanium aluminum nitrogen ("Ti-Al-N") is deposited onto a semiconductor substrate area to serve as an antireflective coating. For wiring line fabrication processes, the Ti-Al-N layer serves as a cap layer (56) which prevents unwanted reflection of photolithography light (i.e., photons) during fabrication. For field emission display devices (FEDs) (150), the Ti-Al-N layer (200) prevents light originating at the display screen (118) anode from penetrating transistor junctions that would hinder device operation. For the wiring line embodiment an aluminum conductive layer (54) and a titanium-aluminum underlayer (52) are formed beneath the antireflective cap layer. The Ti-Al underlayer reduces the shrinkage which occurs in the aluminum conductive layer during heat treatment.
Abstract:
A field emitter device formed by a veil process wherein a protective layer (64/66) comprising a release layer (64) is deposited on the gate electrode layer (62) for the device, with the protective layer overlying the circumscribing peripheral edge of the opening of the gate electrode layer, to protect the edge of the gate electrode layer during etching of the field emitter cavity (72) in the dielectric material layer (30) on a substrate, and during the formation of a field emitter element (40) in the cavity by depositing a field emitter material through the opening. The protective layer is readily removed subsequent to completion of the cavity etching and emitter formation steps, to yield the field emitter device. Also disclosed are various planarizing structures and methods, and current limiter compositions permitting high efficiency emission of electrons from the field emitter elements at low turn-on voltages.
Abstract:
A matrix addressable flat panel display includes a flat cathode (31) operable for emitting electrons to an anode (15) when an electric field is produced across the surface of the flat cathode by two electrodes (34) placed on each side of the flat cathode. The flat cathode (31) may consist of a cermet or amorphic diamond or some other combination of a conducting material and an insulating material such as a low effective work function material. The electric field produced causes electrons to hop on the surface of the cathode (31) at the conducting-insulating interfaces. An electric field produced between the anode (15) and the cathode (31) causes these electrons to bombard a phosphor layer (16) on the anode (15).
Abstract:
A field emitter structure, comprising: a base substrate (42); a field emitter element (48) on the base substrate; a multilayer differentially etched dielectric stack (58, 60) circumscribingly surrounding the field emitter element on the base substrate; and a gate electrode (66) overlying the multilayer differentially etched dielectric stack, and in circumscribing spaced relationship to the field emitter element. Also disclosed are electron source devices, comprising an electron emitter element including a material selected from the group consisting of leaky dielectric materials, and leaky insulator materials, as well as electron source devices, comprising an electron emitter element including an insulator material doped with a tunneling electron emission enhancingly effective amount of a dopant species, and thin film triode devices.
Abstract:
A field emitter device (10) for selective emission of an electron and/or ion beam comprising a substrate member (12) having an array (14) of field emitter elements (16) thereon, in which the field emitter elements and/or substrate member have a varied conformation producing a beam of appropriate focused and/or directional character. Also disclosed is a display article (260) for producing an output in response to impingement of electron beams thereon, comprising a substrate member (262) on which is disposed an array of phosphor elements (264), with a diamond-like film coated on the phosphor elements to maintain the phosphor elements in position on the substrate member. Also disclosed is a field emission apparatus (210) comprising such field emitter device and display article, such as a flat panel display.
Abstract:
This invention relates to a method or forming and using a very dense layer of particles that have been encapsulated in a thermoplastic polymer binder and electrically deposited on a substrate. Space-charge-limited deposition is made possible by the addition of novel charge directors that are essentially nonconductive in aliphatic hydrocarbon liquid in the absence of binder. The particle layer can be designed to possess numerous characteristics by varying the particles to be encapsulated. Many structures can be fabricated from the different particle layers including thermal detectors, electrical interconnects, p-n junctions, micro-metallic structures, field-emitting devices, and optical coatings. A technique for the removal of semiconductor dislocations is also discussed.