1. A memory device, comprising: a first electrode, electrically connected to an access device, including an annular portion with an interior area, the first electrode having an edge surface on the annular portion; a second electrode, electrically connected to a bit line, spaced apart from the first electrode and situated within the interior area, the second electrode having an edge surface; an insulating material separating the first and second electrodes; and a memory material in contact with the edge surface of the first electrode and the edge surface of the second electrode.