Field emission apparatus

A field emission apparatus, comprising:

• a cathode electrode and an anode electrode spaced apart from each other;
• an emitter on the cathode electrode;
• a gate electrode between the cathode and anode electrodes and including at least one gate aperture overlapping the emitter;
• and
• an electron transmissive sheet on the gate electrode and including a plurality of fine openings overlapping the gate aperture,
• wherein each of the fine openings has a width in a range from 5 μm to 45 μm,
• wherein the gate electrode comprises a first surface facing the cathode electrode and a second surface facing the anode electrode, and
• wherein the electron transmissive sheet is positioned directly on the first surface.