Patent ID: 7102150

Claim:
A memory cell comprising: a first layer of dielectric material disposed over a substrate, the first layer of dielectric material having a first window therein; a first line disposed in the first window, the first line being formed of a first conductive material that comprises one of aluminum, copper, nickel, and tungsten; a second layer of dielectric material disposed over the first layer of dielectric material and over the first line, the second layer of dielectric material having a second window therein, the second window exposing at least a portion of the first line; a layer of a second conductive material disposed in the second window over the first line, the second conductive material being different from the first conductive material; a layer of chalcogenide material disposed in the second window over the layer of the second conductive material; and a second line formed of a conductive material and disposed over the layer of chalcogenide material.