Patent ID: 9614147
Date: 2017-04-04
CPC Classifications: G11C,H01L

Claim:
1. A method of fabricating a magnetic tunnel junction (MTJ) device, comprising: depositing a first synthetic antiferromagnetic (SAF) multilayer having a first perpendicular magnetic anisotropy (PMA) and a first damping constant, the first SAF multilayer comprising a first multilayer stack of a first material layer and a second material layer arranged in a first alternating pattern; depositing a SAF coupling layer on the first SAF multilayer; depositing a second SAF multilayer having a second perpendicular magnetic anisotropy (PMA) and a second damping constant lower than the first damping constant, the second SAF multilayer comprising a second multilayer stack of the first material layer and a third material layer arranged in a second alternating pattern; depositing a barrier layer on the second SAF multilayer; and depositing a free layer on the barrier layer.