Patent ID: 9647202
Date: 2017-05-09
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 second magnetic reference layer being Co, Fe, or CoFe, said first and 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 immediately 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 and anti-ferromagnetically coupled to 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 first and a second magnetic free layers with a non-magnetic 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 oriented in a same direction.