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Abstract

A memory array includes memory cells located at cross points of first and second conductors. The memory cells are compound structures including an isolation element for isolating a memory cell from sneak path currents, and a re-writeable storage element for storing a binary state of the memory cell. The isolation elements include tunnel gate surface effect transistor gate oxides, and pillar diode structures. A control gate of the transistor disconnects the tunnel junction from sidewalls of the pillar, preventing sneak path current flow through the memory cells. The isolation elements in the memory cells do not require additional space on the substrate, allowing for a high array density. In addition, the memory cells have a low forward voltage drop, improving the readability of the memory array.

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First Claim