| 摘要 |
<p>PURPOSE:To simplify fabricating processes, give a sufficient amount of electron emission, and eliminate variation or unevenness in modulation by placing electron emitting elements and a modulation electrode in line on the same insulative base body surface, and designing the electrode on this base body surface with a greater occupation area than the elements. CONSTITUTION:In an electron beam generating device, electron emitting elements 2, 3 as source of electron beam and a modulation electrode 4, which modulates electron beam emitted by these elements 2, 3, are placed in line on the same insulative base body surface, wherein the occupation area W2 of the modulation electrode 4 on this base body surface shall be greater than that W1 of the element 2, 3, i.e., three time as large or more. This facilitates alignment of the electrode 4 with element 2, 3, simplifies fabrication, and gives a sufficient amount of electron emission compared with conventional arrangement. Further, this improves remarkably the modulational unevenness between a plurality of electron beams or undeliberate variation of the amount of electron emission at the time of driving, and also provides an excellent modulation efficiency for the electron beam emitted.</p> |
