A field emission device, which among other things may be used within an
ultra-high density storage system, is disclosed. The emitter device
includes an emitter electrode, an extractor electrode, and a solid-state
field controlled emitter that utilizes a Schottky metal-semiconductor
junction or barrier. The Schottky metal-semiconductor barrier is formed
on the emitter electrode and electrically couples with the extractor
electrode such that when an electric potential is placed between the
emitter electrode and the extractor electrode, a field emission of
electrons is generated from an exposed surface of the semiconductor
layer. Further, the Schottky metal may be selected from typical
conducting layers such as platinum, gold, silver, or a conductive
semiconductor layer that is able to provide a high electron pool at the
barrier. The semiconductor layer placed on the Schottky metal is
typically very weakly conductive of n-type and has a wide band gap in
order to create conditions conducive to creating induced negative
electron affinity at applied fields necessary to provide electron
emission. One type of wide band-gap material can be selected from
titanium dioxide or titanium nitride or other comparable materials.