Ballistic electron surface-emitting device emitter, and field emission display and field emission-type backlight device using the same

A ballistic electron surface-emitting device (BSD) emitter, comprising:

• a rear substrate;
• a cathode electrode arranged on the rear substrate;
• a plurality of carbon nanotubes extending normally from the cathode electrode and to conduct ballistic electrons, each of the plurality of carbon nanotubes having tips at an end furthest from the cathode electrode, the plurality of carbon nanotubes being metallic carbon nanotubes;
• and
• a layer arrangement arranged on and contacting only the tips of ones of the plurality of carbon nanotubes, the layer arrangement includes an insulating layer contacting tips of ones of the plurality of carbon nanotubes and a metal electrode layer arranged on the insulating layer, the insulating layer being between 10 nm and 100 nm thick, the insulating layer including SiO2.