Abstract:
Patterned graphite electron emitters are disclosed. These field emitters find particular usefulness in field emitter cathodes and display panels. These graphite field emitters can be formed by screen printing a paste comprised of graphite and electrically insulating material (glass frit) in the desired patterned paste and bombarding the fire product with an ion beam.
Abstract:
A flat panel display includes a cathodic structure (100). The cathodic structure includes a row metal (106) composed of stripes of aluminum overlaid by a layer (107) of cladding material.
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:
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:
There is described a method for creating and keeping a controlled atmosphere in a FED, essentially free of oxidizing gases and including hydrogen at a pressure comprised between 10 and 10 mbar, which comprises the step of arranging inside the FED, before it is frit sealed, a getter material previously charged with hydrogen gas. Subsequently, the two parts forming the FED are frit sealed along their perimeter and the FED itself is evacuated during this operation or later, through a suitably arranged tail, which is hermetically closed after being evacuated through a "tip-off". The getter material is charged by exposing it to hydrogen gas at a pressure comprised between 10 and 2 bar.
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:
Field emitter flat display, having an inner vacuum space wherein there are housed: a) a layer of excitable phosphors and a plurality of microcathodes (MT), which emit electrons driven by a high electric field; and b) a plurality of electric feedthroughs (P) and a vacuum stabilizer (G). Said vacuum stabilizer (g) is essentially formed of a porous supported layer of a non-evaporable getter material, 20 to 180 mu m thick, housed in a zone essentially free from microcathodes, phosphors and feedthroughs.
Abstract:
PURPOSE: A carbon nanotube field emission device and a method for manufacturing the same are provided to prevent a current leakage and achieve improved performance of electron emission by preventing alignment errors of gate electrode and cathode. CONSTITUTION: A field emission device comprises a substrate(111); a transparent cathode layer(112) deposited on the substrate; an insulation layer(115) formed on the cathode layer, and which has a well(118) for partially exposing the cathode layer to the bottom; a gate electrode(116) having an aperture(118') corresponding to the well, and which is disposed on the insulation layer; an ultraviolet shielding resistive layer(120) covering the gate electrode and inner walls of the aperture and the well; and a carbon nanotube(131) disposed on the exposed cathode layer.