Abstract:
An image display device capable of minutely setting the interval between an emitter (6) and a gate (5) with high accuracy and of being driven at a significantly reduced drive voltage with good emission uniformity. Each emitter (6) is provided in a recess in a substrate (2), so that the interval between the emitter (6) and a gate (5) is determined depending upon the thickness of the emitter (6). Thus, the interval can be readily controlled by adjusting or varying the period of time during which the film for the emitter (6) is formed, resulting in a micro-interval of the order of sub-microns between the two components being possible with high accuracy.
Abstract:
An arrangement for and method of automatically collimating an expanding electron beam emitted from a field emission cathode is disclosed herein. This is accomplished without an externally powered colimating or focusing electrode. Rather, a dielectric member is positioned around the path taken by the beam so that when the beam is initially turned on, it bombards the dielectric member with free electrons and thereby places a negative electrostatic charge, ultimately reaching the potential of the cathode electrode itself, on the dielectric member. This electrostatic charge, in turn, causes the cross-sectional configuration of the beam to contract.
Abstract:
A field emission device and method for manufacturing which comprises using a diffusion mask to preserve an area of a silicon substrate for use as a cathode while all around the cathode the substrate is being diffused with oxygen to form an insulating layer. And further comprising depositing a molybdenum gate electrode layer on the insulating layer and etching the molybdenum gate electrode layer such that the diffusion mask falls off and the insulating layer is dissolved around the cathode through the hole formed in the gate electrode layer by the diffusion mask being removed. The gate electrode openings are therefore automatically and independently self-aligned with their respective cathodes.
Abstract:
A method of emitting electrons by applying a voltage between a voltage application electrode and a target to be irradiated with the electrons emitted from an electron emission electrode with a conical portion in an electron emission device. The voltage application electrode is formed to oppose the electron emission electrode so as to sandwich an insulating layer therebetween and the target. A charge of the electron emission electrode which is lost by electron emission during an electron emission operation is supplied after the electron emission operation is completed.
Abstract:
A surface discharge plasma cathode electron beam generating assembly (1) includes an anode (2) maintainable at a substantially constant first potential, a cathode device (3) having a first electrically conductive member (4), a dielectric member (5) at least partially surrounding the first member (4) and electrically conductive means (6) located on the outer surface of the dielectric member (5) and insulated therefrom. A capacitative divider circuit (7) is provided for maintaining the first electrically conductive member (4) at a second potential different from the first potential and for maintaining the electrically conductive means (6) at a high negative third potential relative to the first and second potentials.
Abstract:
A FED with integrally formed deflection electrode coupled to the electron emitter such that any variation of electron emitter operating voltage is coincidentally impressed on the deflection electrode so as to effectively minimize variations in the emitted electron beam cross-section. In image display devices including FEDs with voltage variations induced at the electron emitter to provide image information, integrally formed deflection electrodes are connected to follow the electron emitter variations so that pixel cross-sections remain substantially invariant under device operation.
Abstract:
A cold-cathode field emission device controls electron emission by using a current source coupled to the emitter. The open circuit voltage of the current source is less than the voltage at which the FED would emit electrons. Application of an accelerating potential on the gate enables electron emission. Electron emission from the FED is governed by the current source.
Abstract:
An improvement for a vacuum tube or a plasma tube comprises a cathode loop formed of a material suitable for induction heating. A support structure mounted inside the vacuum tube supports the cathode loop at a cathode position. A power supply mounted outside the vacuum tube includes an induction coil wrapped around the tube near the cathode position and generates an alternating electromagnetic field at the cathode position to induce heat in the cathode loop so that electrons are released into the vacuum tube. Finally, a DC bias is applied to the cathode through the support structure. The improved plasma tube with an induction heated cathode is particularly useful for an ion laser gain medium.
Abstract:
A device for the injection of electrons into an electron tube, having: a superconductive bar, a first end of which enters the tube, and an electrical supply. The bar acts as a cathode. Two anodes, a main anode and a secondary anode are placed in the tube, respectively in the place where the electrons are collected and in the place where the first end of the bar enters. The electrical supply provides for application of two voltages, a main voltage and a secondary voltage. Electrons are accelerated along the bar through the two voltages and acquire a kinetic energy which is at least equal to the energy of extraction from the superconductor, and are thus ejected outside the bar.
Abstract:
Distributed amplifiers in integrated circuit form wherein dielectric matel and electrically conductive material combine to form field emitter cathodes, grids, and anodes in a module forming one or more amplifier cells embedded in a matrix of reactive impedances that form companion stripline-like transmission lines in a vacuum or sufficiently low pressure gas such that electrons remain unscattered during travel over trajectories from cathode to anode in a cell.