Patent ID: 7564109

Claim:
A magnetic memory device comprising: a lower write wiring line including a wiring layer formed in a trench in an insulation layer, a barrier metal layer buried only in the trench over the wiring layer, an entire surface of the wiring layer at the barrier metal layer being uneven, and an entire surface of the barrier metal layer being flatter than the surface of the wiring layer at the barrier metal layer; a first yoke layer that is provided between an inside of the trench and the wiring layer, and having a surface that is continuous with a surface of the barrier metal layer; a magneto-resistance effect element provided above the central part of the surface of the barrier metal layer; an underlying conductive layer that is provided between the lower write wiring line and the magneto-resistance effect element and is in contact with the magneto-resistance effect element; and an insulation layer that is formed on the barrier metal layer.