Patent ID: 9548334
Date: 2017-01-17
CPC Classifications: B82Y,G11C,H01F,H01L

Claim:
1. A magnetic random access memory device comprising a plurality of magnetic tunnel junction (MTJ) memory elements, each of said memory elements comprising: a magnetic reference layer structure including a first and a second magnetic reference layers with a tantalum perpendicular enhancement layer interposed therebetween, said first magnetic reference layer comprising cobalt, iron, and boron, said first and said second magnetic reference layers having a first fixed magnetization direction substantially perpendicular to layer planes thereof; an insulating tunnel junction layer formed adjacent to said first magnetic reference layer opposite said tantalum perpendicular enhancement layer; an anti-ferromagnetic coupling layer formed adjacent to said second magnetic reference layer opposite said tantalum perpendicular enhancement layer; a magnetic fixed layer formed immediately adjacent to said anti-ferromagnetic coupling layer opposite said second magnetic reference layer, said magnetic fixed layer having a second fixed magnetization direction that is substantially perpendicular to a layer plane thereof and is substantially opposite to said first fixed magnetization direction; and a magnetic free layer structure formed adjacent to said insulating tunnel junction layer opposite said first magnetic reference layer, said magnetic free layer structure including a first and a second magnetic free layers with a second tantalum perpendicular enhancement layer interposed therebetween, said first and second magnetic free layers having respectively a first and a second variable magnetization directions that are substantially perpendicular to layer planes thereof and are parallel to each other.