| 摘要 |
<p>PURPOSE:To stabilize electron emission ability for a long period of time without applying high vacuum condition by providing an insulating layer, a phosphor layer, and an acceleration electrode in order on the surface of an electron emission part. CONSTITUTION:An insulating layer 6 is provided between an electron emission part 5 and a phosphor layer 7, while the interfacial condition of an electron emission film 3 as well as the phosphor layer 6 is improved, and the electron emitted from the electron emission part 5 is absorbed into the phosphor layer 6 in a short period of time. An acceleration electrode 8 for giving sufficient energy to excite the phosphor layer 7 is provided on the phosphor layer 7. Not even under a high vacuum condition, electron is emitted highly effectively, and stable emission can be obtained for a long period of time.</p> |
