Patent ID: 7663132

Claim:
A resistance change memory device comprising: a substrate; first wiring lines formed above the substrate; second wiring lines formed above the substrate to cross the first wiring lines while being electrically insulated therefrom; and memory cells disposed at respective crossing points of the first wiring lines and the second wiring lines, one ends thereof being connected to the first wiring lines while the other ends are connected to the second wiring lines, wherein the memory cell comprises: a variable resistance element for storing as information a resistance value; and a Schottky diode connected in series to the variable resistance element, and wherein the variable resistance element comprises a recording layer formed of a first composite compound expressed by A x M y O z (where “A” and “M” are cation elements different from each other: “O” oxygen; and 0.5≦x≦1.5, 0.5≦y≦2.5 and 1.5≦z≦4.5) and a second composite compound containing at least one transition element and a cavity site for housing a cation ion, and wherein the combination of the first composite compound and the second composite compound is one selected from the group consisting of: a combination of spinel type compound (AM 2 O 4 ) as the first compound and ramsdelite type compound (A x MO 2 ) as the second compound; a combination of Mn spinel type compound (ZnMn 2 O 4 ) as the first compound and Ti spinel type compound (ZnTi 2 O 4 ) as the second compound; a combination of Mn spinel type compound (ZnMn 2 O 4 ) as the first composite compound and Al spinel type compound (ZnAl 2 O 4 ) as the second composite compound; a combination of delafossite type compound (CuCoO 2 ) as the first composite compound and ilmenite type compound (CoTiO 3 ) as the second composite compound; and a combination of delafossite type compound (CuCoO 2 ) as the first composite compound and Ti spinel type compound (ZnTi 2 O 4 ) as the second composite compound.