Abstract:
This invention relates to a field emission cathode (1) for a light source. The cathode (1) comprises at least one base body (3) having an emission surface (3null). Further, the base body (3) is formed by a structured material, and the emission surface (3null) is at least partly covered by a field emitting nano-structured material (2). Moreover, this invention relates to a light source, comprising an anode (5), a cathode (1) and an evacuated container (6) enclosing the anode (5) and the cathode (1). The container (6) have at least one inner wall being provided with a luminescent layer (4) as well as a conductive layer forming said anode (5) and the cathode (1) is a field emission cathode of the above mentioned type.
Abstract:
A field emission type cold cathode, a flat display and a method for a same are provided which are capable of improving controllability in formation of an emitter and of generating uniform and stable emission current. The emitter composed of a carbon nano-tube having a length being not more than, at least, a film thickness of an insulating layer is formed on a glass substrate on which a conductive layer is formed. On the emitter are stacked the insulating layer and a gate electrode layer. A part of the insulating layer and the gate electrode layer is etched to cause a gate aperture portion to be formed. The length of the carbon nano-tube is controlled so as to be smaller than that expressed by nulldnullVg/Ebnull, where nulldnull represents the thickness of the insulating layer, nullVgnull represents a voltage to be applied to the emitter and nullEbnull represents dielectric strength.
Abstract:
An emission site for a large area passive matrix cold cathode field emission display having an emission tip with a sharp profile is disclosed. A metallic film formed of iridium silicide (IrSi) is used to coat the tip. By using IrSi the tips of the emission sites can be formed at low temperatures. In addition, IrSi is a fine grain material that maintains a sharp profile and can be formed in a layer as thin as 100 null.
Abstract:
A plurality of field emission device cathodes each generate emission of electrons, which are then controlled and focused using various electrodes to produce an electron beam. Horizontal and vertical deflection techniques, similar to those used within a cathode ray tube, operate to scan the individual electron beams onto portions of a phosphor screen in order to generate images. The use of the plurality of field emission cathodes provides for a flatter screen depth than possible with a typical cathode ray tube.
Abstract:
Electron emitters and a method of fabricating emitters which have a concentration gradient of impurities, such that the highest concentration of impurities is at the apex of the emitters, and decreases toward the base of the emitters. The method comprises the steps of doping, patterning, etching, and oxidizing the substrate, thereby forming the emitters having impurity gradients.
Abstract:
A field emission array includes a plurality of pixels. Each pixel includes at least one resistor, at least one emitter tip overlying each resistor, and at least one substantially vertically oriented conductive line positioned laterally adjacent each resistor. The pixels may be arranged in substantially parallel lines. Adjacent pixels are separated and electrically isolated from one another by recessed areas located therebetween. Each conductive line is located within a recessed area. The conductive lines of a field emission array that includes lines of pixels may contact the resistors of each pixel of the corresponding line of pixels. Base portions of at least some of the emitter tips of the field emission array may overlie a portion of the conductive line that corresponds to the pixel of which such emitter tips are a part. Field emission displays that include such field emission arrays are also disclosed.