But the material of emitting cathode is mostly present with big escaping power, low reliability, low uniformity and emission capability.
目前，场发射阴极材料多种多样，但都存在逸出功大，稳定性及均匀性不理想，发射性能低等方面的问题。
The field emitting device of the present invention includes cathode with at least one electron emitting end and grid with insulating layer in the surface near the electron emitting end.
本发明提供的场发射装置包括阴极和栅极。该阴极上设有至少一个电子发射端。该栅极与该电子发射端临近的表面上设有绝缘层。
The contacting area of the electron-emitting layer and the cathode electrode is limited to the periphery except a center part on the bottom face of the hole.
因此，由于电子发射层接收来自位于其侧 面的阴极电极的电子，所以电子主要从电子发射层表面的边缘部发射， 借此提高电子聚焦性能。
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