A triode-type field emission device, in particular for high frequency applications, comprising a multilayered structure integrating a cathode electrode, an anode electrode spaced from the cathode electrode, a control gate electrode arranged between said anode and cathode electrodes, and at least a field-emitting tip;
- said cathode, control gate and anode electrodes being formed to overlap at a triode area at said field-emitting tip and to cooperate with said field-emitting tip to generate an electron beam in said triode area;
- characterized in that said cathode, control gate and anode electrodes do not overlap outside said triode area.