An information storage apparatus in which one unit (or one bit) of information is stored by bringing a fine tip electrode with a tip portion of a dimension on the order of an inter-atomic distance (or several angstroms) in proximity to an atom on a flat surface of a material (for example, a semiconductor)...http://www.google.es/patents/US5323375?utm_source=gb-gplus-sharePatente US5323375 - Information storage apparatus
