Patent ID: 9087543
Filing Date: 2015-07-21
Classification: G11B,G11C,H01F,H01L

Abstract:
1. A spin torque MRAM structure with perpendicular magnetic anisotropy, comprising: a bottom oxide layer directly on a seed layer; a magnetic layer disposed directly on top of the bottom oxide layer, wherein the magnetic layer includes iron and is magnetized perpendicularly to a longitudinal plane of the magnetic layer, and wherein the bottom oxide layer includes at least one of AlOx, HfOx, CuOx, RuOx, SiOx, WOx, BOx, CaOx, ScOx, ZnOx, CrOx, MnOx, and combinations thereof; a top oxide layer disposed directly on top of the magnetic layer, wherein the top oxide layer includes at least one of CuOx, WOx, BOx, CaOx, ScOx, ZnOx, CrOx, MnOx, and combinations thereof, and wherein a reference magnetic layer comprises a sandwich of the bottom oxide layer, the magnetic layer, and the top oxide layer; a free magnetic layer disposed directly on top of the top oxide layer; and a cap layer disposed on top of the free magnetic layer.