Patent ID: 7521743
Filing Date: 2009-04-21
Classification: B82Y,G11C,H01L

Abstract:
1. A nonvolatile magnetic memory device comprising; a magnetoresistance device having a recording layer formed of a ferromagnetic material for storing information by use of variation in resistance depending on the magnetization inversion state; wherein, a plan-view shape of said recording layer is a pseudo-rhombic shape, two of the four sides constituting said pseudo-rhombic shape each include a smooth curve having a central portion curved toward the center of said pseudo-rhombic shape, the easy axis of magnetization of said recording layer is substantially parallel to the longer axis of said pseudo-rhombic shape, the hard axis of magnetization of said recording layer is substantially parallel to the shorter axis of said pseudo-rhombic shape, the sides constituting the plan-view shape of said recording layer are smoothly connected to each other, and the plan-view shape of said recording layer is substantially line symmetric with respect to the shorter axis of the pseudo-rhombic shape, but not with respect to the longer axis of said pseudo-rhombic shape.