1. A microelectronic programmable structure comprising: a substrate including an insulating layer; a first electrode formed overlying the substrate; an ion conductor proximate the first electrode; and a second electrode, wherein information is written to the microelectronic programmable structure by applying a write bias greater to or equal to a threshold voltage across the first electrode and the second electrode to cause ions within the ion conductor to migrate to cause a change in an electrical property of the microelectronic programmable structure.