Magnetoresistive random access memory cell design
First Claim
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1. A magnetic memory device, comprising:
- a magnetic tunneling junction (MTJ), which comprises a fixed magnetic reference layer with in-plane-anisotropy;
an in-plane-anisotropy magnetic data storage layer, whose magnetization can rotate, and a dielectric tunneling barrier;
a fixed in-plane-anisotropy magnetic layer 1 magnetically separated away from the data storage layer of MTJ and locates on one side of said data storage layer. The magnetization of the layer 1 is normal to the magnetization of the reference layer of MTJ;
a fixed in-plane-anisotropy magnetic layer 2 magnetically separated away from said storage layer of MTJ and locates on the other side of said data storage layer. The magnetization of the layer 2 is also normal to the magnetization of said reference layer of MTJ and is opposite to the magnetization of said layer 1;
Said layer 1 and said layer 2 assist to stabilize said data storage layer of MTJ.
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Abstract
A magnetic memory cell comprises in-plane anisotropy tunneling magnetic junction (TMJ) and two fixed in-plane storage-stabilized layers, which splits on the both side of the data storage layer of the TMJ. The magnetizations of the said fixed in-plane storage-stabilized layers are all normal to that of the reference layer of TMJ but point to opposite direction. The existing of the storage-stabilized layers not only enhances the stability of the data storage, but also can reduce the critical current needed to flip the data storage layer via some specially added features.
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21 Claims
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1. A magnetic memory device, comprising:
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a magnetic tunneling junction (MTJ), which comprises a fixed magnetic reference layer with in-plane-anisotropy;
an in-plane-anisotropy magnetic data storage layer, whose magnetization can rotate, and a dielectric tunneling barrier;a fixed in-plane-anisotropy magnetic layer 1 magnetically separated away from the data storage layer of MTJ and locates on one side of said data storage layer. The magnetization of the layer 1 is normal to the magnetization of the reference layer of MTJ; a fixed in-plane-anisotropy magnetic layer 2 magnetically separated away from said storage layer of MTJ and locates on the other side of said data storage layer. The magnetization of the layer 2 is also normal to the magnetization of said reference layer of MTJ and is opposite to the magnetization of said layer 1; Said layer 1 and said layer 2 assist to stabilize said data storage layer of MTJ. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification