Based on thermionic field emission,this paper presents an analytical model by approximating the physical model which shows good agreement with experimental data over a wide range of gate bias and of temperature.

The field emission properties were tested by using a diode structure in a vacuum chamber.

The field emission cathode was fabricated with a simple screen printing method.

Recently, a number of experiments and theoretical researches have showed that diamond thin films，especially nanocrystalline diamond thin films, could emit electrons at very low fields, and be well suited for field emission cold cathode which is applied in many field emission applications, such as microwave vacuum devices and field emission displays.

Fullerene-like nano-crystalline CN_x films and its characteristics of field electron emission;

The graphite-like film was prepared on silicon substrate by pulsed laser ablation, and the field electron emission from the film was measured.

Prebreakdown was observed under field electron emission experiments from amorphous carbon-polyimide films which were firstly deposited on silicon substrate with high electrical conductivity by pulse laser deposition.

Field emission display (FED) colligates the advantages of Cathode Ray Tube(CRT) and the other Flat Panel Display(FPD), which show high brightness and distinguishability, quick response, wide visual angle and operating temperature range, low power consumption and work voltage, excellent color saturation, etc.