| 摘要 |
<p>A flat, cold-cathode electron emitter (30) including a substrate (33) having a relatively flat surface with a low work function electron emission material layer (34) for emitting electrons supported on the surface of the substrate. A contact conductive layer (35) is disposed on the electron emission material layer (34) and defines an aperture (37) therethrough. An insulating layer (38) is disposed on the contact conductive layer (35) and has an aperture (39) defined therethrough coextensive and in peripheral alignment with the aperture (37) in the contact conductive layer (35) and a conductive gate layer (40) is disposed on the insulating layer (38). The contact conductive layer (35) forms the field potential so that emission occurs substantially in the center of the aperture (37). <IMAGE></p> |
