Abstract: A display device having a pattern of conductors recessed on an electrode, thus reducing the risk of the pattern of conductors being damaged such as from a surface scratch. When the pattern of conductors and the plate are separated from each other by an insulating layer, the pattern of conductors screens the insulating layer from the electron beam. The method is characterized in that grooves are formed between the apertures, and an insulating layer and conducting layer are provided on the walls of the apertures and the grooves.

Abstract: An electron tube comprising a stack of at least one perforate plate-shaped insulating element and at least one perforate plate-shaped metal electrode structure, the insulating element comprising a core and being provided with an aluminium layer at least on a side facing the electrode structure, at least the outer layer of the aluminium layer being oxidized, and the coefficients of thermal expansion of the core and the electrode structure being at least substantially equal. In this manner, the thermal stresses occurring between the insulating element and the electrode structure during firing are reduced, so that the risk of their displacement relative to each other is reduced.

Abstract: For fine-(for example post-)deflection of electron beams is a display tube, particularly of the flat, thin type, electrically insulated deflector plate portions are placed on either side of each beam prior to its reaching the phosphor screen. By choosing a special mask aperture geometry, a deflector is produced after a plate portion is bent out of the mask plane. By combining two masks (plates) with bent plate portions, an electrode structure is obtained having two separate flat deflector aperture electrode pairs per electron beam.