Patent ID: 7800473

Claim:
A system for providing a hold force to an object, said system comprising: a first field emission structure associated with said object, said first field emission structure having first field emission properties in accordance with a first code; and a second field emission structure associated with a surface, said second field emission structure having second field emission properties in accordance with a second code, said first emission structure and said second emission structure providing a hold force between said object and said surface, said first code and said second code corresponding to a spatial force function, said first code corresponding to a code modulo of said first field emission structure and said second code corresponding to a code modulo of said second field emission structure, said first code and said second code defining a peak spatial force corresponding to substantial alignment of said code modulo of said first field emission structure with said code modulo of said second field emission structure, said first code and said second code also defining a plurality of off peak spatial forces corresponding to a plurality of different misalignments of said code modulo of said first field emission structure and said code modulo of said second field emission structure, 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 said peak spatial force.