Abstract:
A thermal electron emission backlight unit includes: first and second substrates arranged parallel to each other; first and second anode electrodes respectively arranged on inner surfaces between the first and second substrates; wall frames adapted to seal an inner space between the first and second substrates; a movable spacer holder and a fixed spacer holder arranged inside the wall frames to face each other; a plurality of spacers arranged between the first and second substrates and adapted to maintain a gap therebetween, wherein ends of the spacers are coupled to the movable and fixed spacer holders; a plurality of cathode electrodes arranged across the spacers between the first and second substrates; and a phosphor layer arranged on the second anode electrode. The spacers include tension spacers adapted to provide tension between the movable and fixed spacer holders by pushing the movable spacer holder away from the fixed spacer holder. The first substrate is adapted to pass white light therethrough.
Abstract:
A gridded electron tube suitable for generating high power at high frequency, has a cathode surface composed of a set of parallel emitting strips separated by non-emitting strips. Massive grid bars are aligned over the non-emitting strips, thereby reducing grid current interception and providing thermal dissipation. Attached to the side of the grid bars facing the cathode is an array of closely spaced fine wires which increase the electric field due to the grid at the emitting surface, and decrease the penetration of field due to the anode, thereby increasing the transconductance and amplification factor, decreasing the transit time of electrons, and improving the uniformity of emission current density.
Abstract:
An apparatus and method for producing electrons in a plasma flood gun is disclosed. The apparatus includes an indirectly heated cathode (IHC) which is contained within a pre-fabricated cartridge. This cartridge can be readily replaced in a plasma flood gun. In addition, the use of an IHC reduces the amount of contaminants that are injected into the workpiece or wafer.
Abstract:
A dispenser cathode which comprises an emission surface, a reservoir for material releasing, when heated, work-function-lowering particles, and at least one passage for allowing diffusion of work-function-lowering particles from said reservoir to said emission surface, said emission surface comprising at least one emission area and at least one non-emission area covered with emission-suppressing material and surrounding each emission area, said non-emission area comprising at least one passage connecting said reservoir with said non-emission area and debouching within a diffusion length distance from an emission area for allowing diffusion of work-function-lowering particles from said reservoir to said emission area.
Abstract:
To provide an electron source which is suitable for an electron beam lithography machine, an Auger electron spectroscope or the like and provides a small total emission current even in a high angular intensity operation. An electron gun provided with a cathode which comprises a single crystal needle of tungsten or molybdenum and a coating layer consisting of oxygen and at least one metal element selected from the group consisting of Group 2A, Group 3A and Group 4A, formed on its surface, characterized in that an apex of the cathode as a truncated cone shape, and the truncated cone shape portion has a cone angle of from 25° to 95° and a diameter of the top surface of from 5 μm to 200 μm.
Abstract:
In a controllable high-power electron tube in the form of a tetrode, the anode direct voltage is reduced to less than 10 kV with an anode efficiency of greater than 80%. The tube includes coaxially arranged electrodes including a cylindrical indirectly heated full walled matrix cathode containing BaO, a cylindrical control grid, a cylindrical screen grid and an anode, where the spacing between the control grid and the cathode and the spacing between the control grid and the screen grid is less than 1 mm. Such a tube can be used for achieving AM broadcast transmitters which are distinguished by a compact construction, the overall efficiency remaining largely unchanged.
Abstract:
In a cathode-ray tube an inline electron gun assembly includes a center cathode assembly disposed between two outer cathode assemblies. The center cathode assembly and the outer cathode assemblies each comprise a tubular cathode sleeve having oppositely disposed ends, a filament disposed within the sleeve and spaced therefrom, and a cathode eyelet coaxially surrounding at least a portion of the cathode sleeve. The cathode sleeve is open at one end and closed at the other end by a cap having an electron emissive material thereon. The open end of the cathode sleeve is attached to the interior surface of the eyelet. At least a portion of the interior surface of at least one of the eyelets is modified to change the radiant energy emission characteristics thereof.
Abstract:
Presented is a cathode-heater assembly including a support structure for the cathode-heater assembly that is particularly rugged in that it resists displacement of the cathode-heater assembly in all planes, and minimizes power requirements to raise the cathode to operating temperature.
Abstract:
Electronic device comprising an evacuated envelope containing a main thermionic cathode heated solely by energetic electrons emitted from an unheated auxiliary field-emission cathode.