A memory device comprising a access circuits, an electrode layer over the
access circuits, an array of phase change memory bridges over the
electrode layer, and a plurality of bit lines over the array of phase
change memory bridges. The electrode layer includes electrode pairs.
Electrode pairs include a first electrode having a top side, a second
electrode having a top side and an insulating member between the first
electrode and the second electrode. A bridge of memory material crosses
the insulating member, and defines an inter-electrode path between the
first and second electrodes across the insulating member.