Patent ID: 8063460
Filing Date: 2011-11-22
Classification: B82Y,G01R,G11C,H01F,H01L

Abstract:
1. A method of fabricating a spin torque magnetic integrated circuit, the method comprising: forming a first free ferromagnetic layer on a portion of a substrate, the first free ferromagnetic layer comprising a sidewall; forming a first coupling layer on the first free ferromagnetic layer, the first coupling layer conformal with the sidewall and adjacent to an exposed portion of the substrate; forming a second free ferromagnetic layer on the first coupling layer and on the exposed portion of the substrate, the second free ferromagnetic coupling layer conformal with the first coupling layer; forming a second coupling layer on the second free ferromagnetic layer, the upper most surface of the second coupling layer approximately planar with the upper-most surface of the second free ferromagnetic layer; forming a third free ferromagnetic layer on the portion of the second coupling layer above the exposed portion of the substrate, the upper-most surface of the third free ferromagnetic layer approximately planar with the upper-most surface of the second coupling layer; forming a non-magnetic layer on the upper-most surfaces of the second coupling layer and the second and third free ferromagnetic layers; and forming a write pillar and a read pillar, each pillar formed above the non-magnetic layer and comprising an anti-ferromagnetic layer formed above a fixed ferromagnetic layer.