| 摘要 |
PURPOSE:To obtain a display device with the good focusing properties by constituting at least one electrode of the electron beam control electrodes performing focusing, deflection and modulation of a conductive magnet body having a thickness of 0.01mum-2mm. and the vertical magnetization on its surface. CONSTITUTION:In a display device, in which an electron beam is taken out of an electron source for being focused, deflected and modulated while being made to collide with a phosphor, the electrode part for taking out an electron beam is formed of a conductive substrate 15, a conductive magnet body 16, in which a Co-Cn vertical magnetic film of hexagonal system is formed on its surface by a sputtering method up to a thickness of 0.01mum-2mm. so that its magetization direction 16a may be all alike vertical to the surface of the substrate, as well through holes 15a. In this way, the electron beam 18 having low electron speed fetched from the cathode by a focusing mgnetic field 17, which is made by the electron beam fetch electrode, is focused in a fully spiral shape so as to make a display device with the good focusing properties having an well-regulated orbit. |
