Patent ID: 8879307
Filing Date: 2014-11-04
Classification: G11C

Abstract:
1. A magnetoresistive device comprising: an interconnect layer having a first face and a second face opposed to the first face; first and second devices each including a first magnetic layer having a magnetization that can be changed by spin transfer torque writing and is perpendicular to a film plane, a second magnetic layer having a fixed magnetization perpendicular to a film plane, and a nonmagnetic layer interposed between the first magnetic layer and the second magnetic layer, the first and second devices being disposed in parallel on the first face of the interconnect layer, and a face of the first magnetic layer of each of the first and second devices remoter from the nonmagnetic layer facing the first face of the interconnect layer; and a tunneling magneto resistive (TMR) device including a third magnetic layer having perpendicular magnetic anisotropy and having a changeable magnetization, a fourth magnetic layer having a fixed magnetization parallel to a film plane, and a tunnel barrier layer interposed between the third magnetic layer and the fourth magnetic layer, the TMR device being disposed on the second face of the interconnect layer, a face of the third magnetic layer remoter from the tunnel barrier layer facing the second face of the interconnect layer, and the third magnetic layer being magnetostatically coupled to the first magnetic layers of the first and second devices, wherein at least one of the following conditions (a), (b) or (c) is satisfied: (a) the interconnect layer is a nonmagnetic layer, (b) first and second select transistors are electrically connected to the second magnetic layers of the first and second devices, respectively; or (c) a third select transistor is electrically connected to the terminal for reading.