Abstract:
A first laminated sub-structure having a semiconductor substrate, a lower insulating layer on the semiconductor substrate, emitter electrodes formed in micro-apertures in the lower insulating layer and a gate electrode on the upper surface of the lower insulating layer is aligned with a second laminated sub-structure having a transparent upper insulating layer and a grid member on the transparent upper insulating layer by means of a stepper, and the first and second laminated sub-structures are fixed to each other through a field assisted glass-metal sealing technique.
Abstract:
A field emission cold cathode includes a conductive substrate, an insulating layer formed on the substrate and having plural cavities each for receiving an emitter, a gate electrode for applying a high electric field to the tips of emitters. An annular portion of the gate electrode defines an opening of a corresponding cavity is located at a distance from the substrate smaller than the distance between an elevated middle portion of the gate electrode and the substrate. Parasitic capacitance between the gate electrode and the cold cathode including the substrate and the emitter is reduced due to the large distance between the elevated middle portion of the gate electrode and the substrate. Between the elevated middle portion and the substrate, a second insulating layer or a gap is disposed. The field emission cold cathode can function in a high frequency range while fabricating conical emitters with a small height due to the small distance between the annular portions and the substrate.
Abstract:
An array field emitter device utilizes field emission devices disposed in a matrix or array each comprising an opening in an insulating layer with an upwardly extended cathode with a tip disposed centrally within the opening and a gate electrode substantially concentric with each the cathode tip and having a lip extending into the opening forming a downwardly descending lip projection. Such an array display device can be of the multiplex driven type or can be of the active matrix type.
Abstract:
Lateral luminescent field emitter devices for use in flat panel displays and a method of manufacturing are described. The device comprises a flat substrate, an anode disposed on the substrate, and a cathode disposed on the substrate, the cathode providing an electron emission surface capable of emitting electrons laterally across a gap to a major portion of an adjacent surface of the anode.
Abstract:
A FED including an integrally formed electrostatic lens with an aperture having a diameter which is dis-similar from an aperture of the FED gate to effect a reduction in electron beam cross-section. By forming the FED with an electrostatic lens aperture of increased diameter relative to the diameter of the gate aperture a reduced sensitivity with respect to lens thickness and location is realized as is a relaxation of electrostatic lens fabrication constraints. Image display devices employing such integrally formed electrostatic lens systems may be provided wherein pixel cross-sections as small as two microns are realized.
Abstract:
A semiconductor vacuum device including a semiconductor substrate 3, an insulator film 2 formed on the substrate 3, and a single crystal semiconductor film 1 formed on the insulator film 2. The single crystal semiconductor film 1 has a first and a second tapered edge opposite to one another but spaced apart over a gap formed in the insulator film 2. The first tapered edge acts 6 as a cathode and the second tapered edge acts as a gate 7, the substrate 1 acting as an anode into which said electrons emitted from the cathode above.
Abstract:
A voltage is selectively applied between two electrodes (emitter and gate) disposed at a short distance to create an intense electric field between the electrodes. Electrons emitted by the field emission are accelerated by the intense electric field and collide against a fluorescent layer so that light can be emitted from portions of the fluorescent layer. With a recording head of the above construction, an electrostatic latent image is formed on a photosensitive drum.
Abstract:
A massively parallel electron beam array for controllably imaging a target includes a multiplicity of emitter cathodes, each incorporating one or more micron-sized emitter tips. Each tip is controlled by a control electrode to produce an electron stream, and its deflection is controlled by a multielement deflection electrode to permit scanning of a corresponding target region.
Abstract:
A system for controlling the shape of a charged particle beam. The particle beam is emitted from a source (58) of the said particles. Said source is associated with a collecting electrode which collects the particles. The system comprises at least one resistive zone (56) and at least two control electrodes (52, 54). The resistive zone and the control electrodes are arranged substantially at the same level as the source. The control electrodes are also placed on either side of the resistive zone and serve to polarize the latter. The electrical resistance profile of the resistive zone is chosen in such a way that it has the potential distribution so that it is possible to obtain the desired shape of the beam from the source when the control electrodes are appropriately polarized.
Abstract:
A Pierce electron gun is provided having a cathode, a focusing electrode surrounding the cathode, and an anode disposed a fixed distance from the cathode and having an opening therethrough. The electron gun has at least one grading electrode disposed between the focusing electrode and the anode. The grading electrode controls shape of equipotential lines of an electric potential difference provided between the anode and the cathode, to purposely reduce field gradient levels formed by the electric potential difference. The grading electrode further has a double radial bend having an inner radial curve of a first radius and an outer radial curve of a second radius.