Abstract:
A device produces an electric field between two electrodes, the electric field having a specified value in the vicinity of a first of the two electrodes. The device includes a means for applying a potential difference between the two electrodes, means forming modulation electrode located near to the first electrode in the vicinity of which the electric field must have specified value. The device also includes control means for applying a potential difference between the means forming modulation electrode and the first electrode located nearby in order to obtain, through the contribution of the potential differences, the specified value of electric field.
Abstract:
The invention involves the making of a group of apertures spaced in a precise manner on a structure and including, for example, a first aperture made in a first layer and a second aperture made in a second layer which covers the first layer, the first aperture being located within the second aperture. This involves: applying a first layer (41) of photosensitive resin, the etching of this resin layer by photolithography, by means of a single template, to leave a spot of resin (42) per group of apertures on the first layer (41), the exterior limits of the resin spot corresponding to the second aperture, and with the resin spot including an aperture (43) corresponding to the first aperture, vacuum application on the first layer (41) and on the remaining resin of material (44) which will make up the second layer, this application being done so that the part (45) of the first layer located at the bottom of the aperture (43) of the resin spot (42) is not covered by this deposit, the etching of the first layer (41) from the aperture (43) of the spot (42) to obtain the first aperture (46) in the first layer, elimination of the remaining resin and material covering it to obtain the second aperture in the second layer.
Abstract:
A process for manufacturing a micropoint electron source with an extraction grid and a focusing grid. This process allows for precise alignment of the holes of the extraction grid with the apertures of the focusing grid by using a single photolithography step for making the holes in the extraction grid. Such a process may find particular application for making a micropoint electron source for a flat viewing screen.
Abstract:
A process for the formation of holes in a photosensitive resin layer, which can be applied to the production of electron sources having emissive cathodes with microtips and flat display screens. According to this process, a resin layer is exposed through a monolayer of balls transparent to an exposure light, with each ball focussing the light onto the resin layer and in this way bringing about the exposure of an area of said resin layer so that the thus exposed resin layer is developed.
Abstract:
A method for forming a microtip electron source includes the steps of forming a first microtip electron source using a mask, determining deviations in the structure of the first microtip electron source from a structure which should theoretically have been obtained using the first mask, and then correcting the first mask used during fabrication of the first microtip electron source that are designed to generate additional deviations that compensate for the effects upon performance of the deviations determined in the first microtip electron source when subsequent microtip electron sources are fabricated using the mask.