| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize an FED (cold cathode type electron emission element) which can carry out a low vacuum operation, a stable large current operation, and a low voltage operation, which cannot be carried out by the conventional FED, and can carry out an individual operation. SOLUTION: A graphite 2 to be a cathode is provided about 1μm on a glass substrate 1. And furthermore, a carbon nanotube layer 3 to be an electron emitting layer is provided at severalμm thereon. This nanotube has the diameter from 10 to 40nm, and the length from 0.5 to severalμm. Those members are formed in the line form in the vertical direction to a section figure. Furthermore, at both sides of a line form electron emission layer (the width of about 30μm), an insulating area 4 which consists of a silicon oxide membrane is provided in the line form with the width of approximately 20μm and the thickness of approximately 7μm. A wiring electrode 5 is provided vertical to the electron emitting part (parallel to the section figure) thereover, so as to form a grid electrode. By applying a positive voltage to grid 5, and a negative voltage to a cathode 2, electrons 6 are discharged in the directions of the arrows.</p> |
