Magnetic memory device
View Patent ↗A magnetic memory device includes a semiconductor substrate; a magnetoresistive element provided on the semiconductor substrate. The magnetoresistive element includes a storage layer, a tunnel barrier layer, and a reference layer which are stacked, the reference layer having a magnetization direction perpendicular to a principal surface of the semiconductor substrate. The magnetic memory device further includes a magnetic field generation section provided away from the magnetoresistive element and configured to generate a magnetic field perpendicular to the principal surface of the semiconductor substrate. The semiconductor substrate, the magnetoresistive element and the magnetic field generation section are integrated as one unit.
1. A magnetic memory device comprising:
a semiconductor substrate;
a magnetoresistive element provided on the semiconductor substrate and comprising a storage layer, a tunnel barrier layer, and a reference layer which are stacked, the reference layer having a magnetization direction perpendicular to a principal surface of the semiconductor substrate; and
a magnetic field generation section provided away from the magnetoresistive element and formed of a magnetic material containing, as a main component, at least one selected from a Co—Cr alloy, an Sm—Co alloy, a Co—Pt alloy, an Fe—Pt alloy, an Nd—Fe alloy, an Mn—Al alloy, an Al—Ni—Co alloy, a Ba ferrite oxide, and a Co ferrite oxide,
wherein the semiconductor substrate, the magnetoresistive element and the magnetic field generation section are integrated as one unit, and
wherein the magnetic field generation section comprises at least one of an adhesion member, a mold material, and a package for a die, the die including the semiconductor substrate and the magnetoresistive element.
2. The device of claim 1 , wherein the storage layer is provided between the magnetic field generation section and the reference layer, and the tunnel barrier layer is provided between the storage layer and the reference layer.
3. The device of claim 1 , wherein the magnetoresistive element comprises a shift cancelling layer further stacked to the storage layer, the tunnel barrier layer and the reference layer.
4. A magnetic memory device comprising:
a semiconductor substrate;
a magnetoresistive element provided on the semiconductor substrate and comprising a storage layer, a tunnel barrier layer, and a reference layer which are stacked, the reference layer having a magnetization direction perpendicular to a principal surface of the semiconductor substrate; and
a magnetic field generation section provided away from the magnetoresistive element and configured to generate a magnetic field perpendicular to the principal surface of the semiconductor substrate,
wherein the semiconductor substrate, the magnetoresistive element and the magnetic field generation section are integrated as one unit, and
wherein the magnetic field generation section comprises at least one of an adhesion member mixed with a magnetic material, and a mold material including magnetic particles mixed into a mold resin.
5. The device of claim 4 , wherein the storage layer is provided between the magnetic field generation section and the reference layer, and the tunnel barrier layer is provided between the storage layer and the reference layer.
6. The device of claim 4 , wherein the magnetoresistive element comprises a shift cancelling layer further stacked to the storage layer, the tunnel barrier layer and the reference layer.