| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electron source which enables to form precise and small electron emitting elements giving an electron beam of a small diameter at high yield, and further to provide an image forming device capable of forming images of fine quality and high precision using the above electron source. SOLUTION: Where there is a short circuit failure 11, a part of a cathode electrode line 52, a repair zone 12, is cut to convert the cathode electrode line 52 to a partially floating state, which leads the direction of the electric field opposite at the electron-emitting part closest to the short circuit failure 52. As a result, electron emission is prevented. Unnecessary electron beam is then avoided, and the specific beam of a desired beam size can be obtained.</p> |
