The flat panel display includes cathode faceplate, anode faceplate, vacuum cavity sealed by surrounded glass frame, anodic conducting layer photo etched on anode faceplate, phosphor powder layer prepared on up face of the anodic conducting layer, structure of supporting wall, and subsidiary components for getter sealed in the vacuum cavity. Being prepared on cathode faceplate, circular embedded type back grid structure is in use for controlling electron emission of Nano carbon tubes. The back grid structure is located under cathode of Nano carbon tubes and at same plane. The circular embedded part of the structure is surrounded by cathode of Nano carbon tubes. Advantages are: reliable and steady producing procedure, simple technique and structure. |