Patent ID: 7709289
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. A method of forming a memory element, the method comprising the acts of: forming a plurality of first electrodes over a substrate; forming a blanket material stack over the first electrodes, the stack including a plurality of materials, wherein the act of forming the material stack comprises forming a metal-chalcogenide material over a chalcogenide material, and forming a metal material over the metal-chalcogenide material; forming a first conductive material on the stack; and etching the first conductive material and at least one of the materials of the stack, without etching through the resistance variable material to form a first pattern of material stacks, such that the resistance variable material is common to a plurality of the material stacks, and the etched first conductive material forms a plurality of second electrodes with a portion of the resistance variable material located between each of the first and second electrodes.