| 摘要 |
<p>On a substrate 1 having at least one conductive surface are formed an insulating film 2 and a conductive gate film 3. In a predetermined area, an opening reaching the substrate 1 is formed and a conical emitter electrode is formed in the opening. A shield member 13 is formed, which spatially shields at least part of the insulating film 7 from the emitter electrode.</p> |
