发明名称 |
Magnetic random access memory element having tantalum perpendicular enhancement layer |
摘要 |
The present invention is directed to a spin transfer torque (STT) MRAM device having a perpendicular magnetic tunnel junction (MTJ) memory element. The memory element includes a perpendicular MTJ structure in between a non-magnetic seed layer and a non-magnetic cap layer. The MTJ structure comprises a magnetic free layer structure and a magnetic reference layer structure with an insulating tunnel junction layer interposed therebetween, an anti-ferromagnetic coupling layer formed adjacent to the magnetic reference layer structure, and a magnetic fixed layer formed adjacent to the anti-ferromagnetic coupling layer. At least one of the magnetic free and reference layer structures includes a non-magnetic perpendicular enhancement layer, which improves the perpendicular anisotropy of magnetic layers adjacent thereto. |
申请公布号 |
US9559144(B2) |
申请公布日期 |
2017.01.31 |
申请号 |
US201514730117 |
申请日期 |
2015.06.03 |
申请人 |
Avalanche Technology, Inc. |
发明人 |
Gan Huadong;Huai Yiming;Zhou Yuchen;Wang Zihui;Wang Xiaobin;Yen Bing K. |
分类号 |
H01L27/22;H01L43/02;H01L43/10;H01L43/08;H01L23/528;H01F10/32;G11C11/16;H01F41/30;H01L29/66;B82Y40/00 |
主分类号 |
H01L27/22 |
代理机构 |
|
代理人 |
Yen Bing K. |
主权项 |
1. A magnetic random access memory device comprising a plurality of memory elements, each of said memory elements including a magnetic tunnel junction (MTJ) structure in between a non-magnetic seed layer and a non-magnetic cap layer, said MTJ structure comprising a magnetic free layer structure and a magnetic reference layer structure with an insulating tunnel junction layer interposed therebetween, wherein said magnetic reference layer structure includes a first magnetic reference layer formed adjacent to said insulating tunnel junction layer and a second magnetic reference layer separated from said first magnetic reference layer by a first non-magnetic perpendicular enhancement layer with said first and second magnetic reference layers having a first fixed magnetization direction substantially perpendicular to layer planes thereof, said magnetic free layer structure includes two magnetic free layers with a second non-magnetic perpendicular enhancement layer interposed therebetween, said two magnetic free layers having variable magnetization directions that are substantially perpendicular to layer planes thereof and are parallel to each other. |
地址 |
Fremont CA US |