Patent Number: 
Section: claims

1. An electronic emission device including plural electron beams comprising:a first structure including a plurality of emitting sources of electron beams;a second structure including a plurality of diaphragm openings; andmetallic balls made from at least one of fusible metal alloys and gold interposed between the first structure and the second structure and hybridizing the first structure with the second structure. 2. The device according to claim 1, in which the second structure includes an electrode or a metallic or conductive or semiconductive membrane. 3. The device according to claim 1, in which at least one diaphragm opening has two different opposite opening surfaces, the opening surface of a first side of the diaphragm having an area greater than an area of the opening surface of a second side of the diaphragm. 4. The device according to claims 1, in which each diaphragm opening comprises a bevelled, flat, concave, or convex opening edge profile. 5. The device according to claim 1, in which each of the first structure and the second structure comprises a periodic arrangement of sources of emission of electrons or diaphragm openings, the structures having a matrix arrangement or a multilinear arrangement or a linear arrangement, regular or irregular. 6. The device according to claim 1, in which the sources of electron beam emission and the diaphragm openings are arranged with a spacing of about a few microns to one millimeter. 7. The device according to claim 1, further comprising electrostatic or magnetic or electromagnetic means for focusing electron beams. 8. The device according to claim 1, further comprising means for magnetic projection. 9. The device according to claim 1, further comprising a polarized anode or electrode structure arranged outside the second structure of diaphragm openings. 10. The device according to claim 1, in which the second structure comprises at least one conductive part and at least one dielectric part. 11. The device according to claim 1, in which the second structure comprises two levels of electrodes or membranes, which are metallic, conductive, and attached to at least one dielectric layer. 12. The device according to claim 1, in which the second structure includes, around zones of the diaphragm openings, a thickness of about a fraction of a micrometer to a few hundred micrometers. 13. The device according to claim 1, in which the second structure includes, outside zones of the diaphragm openings, a thickness of about one micrometer to around one millimeter. 14. The device according to claim 1, in which the second structure includes an alveolar structure insulating each opening or plural groups of openings from one another, such that each opening or each group of openings is subjected to a respective polarization potential. 15. The device according to claim 1, in which at least one side of the diaphragm of the second structure is disposed in an electric field for acceleration or focusing of electrons. 16. The device according to claim 1, in which the second structure of diaphragm opening comprises two opposite sides, a first side facing an electric field, and a second side facing another electric field. 17. The device according to claim 1, in which at least one diaphragm opening has two different opposite opening surfaces, the opening surface of a first side of the diaphragm having an area greater than an area of the opening surface of the second side of the diaphragm, at least one side of the diaphragm of the second structure is disposed in an electric field for acceleration or focusing of electrons, the diaphragm openings are oriented such that the opening surface of greater area faces the electric field of greater value, and the opening surface of lesser area facing the electric field of less value or in absence of an electric field. 18. The device according to claim 1, in which each diaphragm opening comprises a bevelled, flat, concave, or convex opening edge profile, at least one side of the diaphragm of the second structure is disposed in an electric field for acceleration or focusing of electrons, the diaphragm openings are oriented such that the opening surface of greater area faces the electric field of greater value, and the opening surface of lesser area facing the electric field of less value or in absence of an electric field. 19. The device according to claim 1, in which at least one diaphragm opening has two different opposite opening surfaces, the opening surface of a first side of the diaphragm having an area greater than an area of the opening surface of a second side of the diaphragm, in which the second structure of diaphragm opening comprises two opposite sides, a first side facing an electric field, a second side facing another electric field, the diaphragm openings are oriented such that the opening surface of greater area faces the electric field of greater value, and the opening surface of lesser area facing the electric field of less value or in absence of an electric field. 20. The device according to claim 1, in which each diaphragm opening comprises a bevelled, flat, concave, or convex opening edge profile in which the second structure of diaphragm opening comprises two opposite sides, a first side facing an electric field, a second side facing another electric field, the diaphragm openings are oriented such that the opening surface of greater area faces the electric field of greater value, and the opening surface of lesser area facing the electric field of less value or in absence of an electric field. 21. The device according to claim 1, wherein the second structure is disposed completely above the emitting sources of the electron beams, and the second structure controls divergence of the electron beams.