Patent ID: 9059399
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A spin torque transfer random access memory device consisting of: a reference layer disposed directly on a seed layer; a tunnel barrier disposed directly on the reference layer; a free layer disposed directly on the tunnel barrier; and a cap layer disposed directly on the free layer; wherein the free layer consisting of a first magnetic layer disposed directly on the tunnel barrier, a spacer layer disposed directly on the first magnetic layer, a second magnetic layer disposed directly on the spacer layer, and a metal oxide layer disposed directly on the second magnetic layer; wherein a metal material used in the metal oxide layer consisting of at least one of Ti, Ta, Ru, Hf, La, and wherein the cap layer consisting of at least one of Pd, Pt, Ta, TiN, wherein the spacer layer consisting of at least one of Ta, Ti, TiN, TaN, and wherein the first magnetic layer consisting of at least one of Fe, CoFe, CoFeB, CoPt, FePt, CoPd, FePd; and wherein the second magnetic layer consisting of at least one of Fe, CoFe, CoFeB, CoPt, FePt, CoPd, FePd; wherein the first magnetic layer has a thickness ranging from 5 angstroms to 20 angstroms; and wherein the second magnetic layer has a thickness ranging from 5 angstroms to 20 angstroms; wherein the cap layer has a thickness ranging from 2 angstroms to 40 angstroms; wherein the spacer layer has a thickness ranging from 0.5 angstrom to 10 angstroms.