Patent ID: 8587043

Claim:
A magnetoresistive random access memory comprising: a magnetoresistive element in a memory cell, the magnetoresistive element including a first metal magnetic layer, a second metal magnetic layer, an insulation layer interposed between the first and second metal magnetic layers, a pinned layer formed on a surface of the first metal magnetic layer, a recording layer formed on a surface of the second metal magnetic layer, a first oxide film formed on a side surface of the first metal magnetic layer, and a second oxide film formed on a side surface of the second metal magnetic layer, a third oxide film formed on a side surface of the pinned layer, and a fourth oxide film formed on a side surface of the recording layer, wherein the surface of the first metal magnetic layer is opposite to a surface of the first metal magnetic layer facing the insulation layer, the surface of the second metal magnetic layer is opposite to a surface of the second metal magnetic layer facing the insulation layer, a side surface of the first oxide film, a side surface of the second oxide film and a side surface of the insulation layer are flush with one another, the side surface of the first oxide film is opposite to a side surface of the first oxide film facing the first metal magnetic layer, the side surface of the second oxide film is opposite to a side surface of the second oxide film facing the second metal magnetic layer, and a side surface of the magnetoresistive element is extended in a direction perpendicular to a substrate, an area of each of the first and second metal magnetic layers is smaller than an area of the insulation layer, and an area of each of the pinned layer and the recording layer is smaller than the area of the insulation layer.