Patent ID: 7864010

Claim:
A field emission system, comprising: a first field emission structure, said first field emission structure comprising a first plurality of field emission sources having positions and polarities in accordance with a spatial force function, said positions of said first plurality of field emission sources being configured such that distances between all combinations of any two field emission sources of said first plurality of field emission sources are unique; and a second field emission structure, said second field emission structure comprising a second plurality of field emission sources having positions and polarities in accordance with said spatial force function, said positions of said second plurality of field emission sources being configured such that distances between all combinations of any two field emission sources of said second plurality of field emission sources are unique, said spatial force function corresponding to a code modulo defined by a code, said code modulo having a peak spatial force and a plurality of off peak spatial forces, said plurality of off peak spatial forces having a largest off peak spatial force, said largest off peak spatial force being less than half of the peak spatial force.