| 摘要 |
<p>PURPOSE: To provide a conductive surface electron emitting element, as an electron beam source and having high brightness, high fineness, and obtainable of a high quality picture image without uneven brightness, when the screen size is increased for a picture image forming device. CONSTITUTION: In this conductive surface electron emitting element, an electron emitting part 2 is provided on a conductive thin coat 3 over element electrodes 4 and 5 formed on a base plate 1. The electron emitting part 2 is arranged only in the vicinity of the different level part of the element electrode 5 portion, a part being formed thick, and a control electrode 7 is arranged via an insulating layer 6 onto the element electrode 5 in the vicinity of the electron emitting part 2. Consequently, the attraction of an emitted electron to a high electric potential side element electrode can be prevented, by making drive with the element electrode 5 made to have high electric potential and the element electrode 4 and control electrode 7 made to have low electric potential, thereby improving an electron emitting efficiency.</p> |
