Patent ID: 6900490
Filing Date: 2005-05-31
Classification: B82Y,H01L

Abstract:
1. A magnetic random access memory comprising: at least one first wiring and at least one second wiring disposed so as to intersect each other; at least one magnetic tunnel junction element having the tunneling magneto-resistive effect and disposed at the intersection of the first and second wirings, said at least one magnetic tunnel junction element having a structure in which a non-magnetic layer is sandwiched between a fixed layer and a free layer both made of a magnetic film, having a long-side and a short-side of a rectangle, being provided with a spin direction such that the long-side of rectangle is set along the second wiring and that the short-side thereof is set along the first wiring, and along the long-side direction, and having an upper surface which is upwardly convex in the central portion as viewed in the short-side direction, with the long axis as a center of convexity, and a lower surface which is downwardly concave in the central portion as viewed in the short-side direction, with the long axis as a center of concavity; a conductive hard mask formed to cover the upper surface of the magnetic tunnel junction element; conductive contact plugs for electrically connecting the hard mask and the first wiring; a connection wiring to be electrically connected to the lower surface of the magnetic tunnel junction element; and an interlayer insulating film provided to be interposed between the connection wiring and the second wiring.