Abstract: The present invention relates to a flat display screen formed of two parallel plates, defining a space between electrodes, at least a first screen plate including, outside active areas, pads protruding towards a second plate and of a thickness clearly lower than the thickness of the space between electrodes, the pads being distributed by groups of at least three pads to form reception housings for balls of definition of the space between electrodes.

Abstract: A method for assembling two parallel plates respectively forming the bottom and the face of a flat display screen including a degassing step of the plates and a vacuum burn-in step. The method includes the steps of subjecting a first plate to a burn-in step by electronic bombardment, moving under a vacuum the first plate so as to face a second plate, and assembling the two plates with a specific peripheral sealing joint.

Abstract: A device for sputtering a metallic material on a plate comprises a vacuum chamber provided with a linear conveyor carrying at least one plate, the plate surface to be processed being turned downward. At least two sputtering sources are disposed under the conveyor, perpendicularly to its moving direction. Each source is associated with a collimator. The sputtering sources and their associated collimators are disposed to coat the whole width of the plate.

Abstract: A flat display device includes two parallel plates each being provided, on its inner surface, with internal conductors extending outside a vacuum chamber provided between the two plates. A first plate has at least one lateral portion protruding with respect to the second plate. The screen further includes at least one insulating bar fastened onto the inner surface of the protrusion and is provided, on its surface facing the edge of the second plate and vertically with respect to the extensions of the inner conductors of the first plate, with grooves defining conductive transverse passageways.

Abstract: A method for assembling a spaced flat panel display screen having a first plate and second plate, each with an internal facing surface that are opposing comprises the steps of positioning spacers on the internal facing surface of the first plate, positioning the second plate so that the internal facing surface of the second plate contacts the spacers, heating the spacers to a temperature causing soldering of the spacers to the plates, pulling the first and second plates apart to stretch the spacers to a predetermined distance, and cooling the spacers.

Abstract: A short pumping stem for flat display screens, more particularly for microtip flat display screens, generally adaptable to flat display screens constituted by a vacuum chamber, includes, before closure, an exhaust tube whose lower portion is integral with the middle portion of an upper concave wall of a cylindric portion having a diameter larger than the diameter of the tube.