Granted Patent B2

US 10,157,656 · App. 14/834,743 · Granted Dec 18, 2018

Abstract

Claims (29)

1. A magnetic memory cell comprising:

a first conductor M 1 ;

a second conductor M 2 ;

said first conductor M 1 being formed of a magnetic material, and said second conductor M 2 being more electrically conductive than said first conductor M 1 , said first conductor M 1 , and said second conductor M 2 being unpatterned;

an oxide barrier directly in contact with a wordline and the first conductor M 1 , said oxide barrier disposed between said first conductor M 1 and the wordline;

a programmable area of said magnetic memory cell using unpatterned programmable magnetic media disposed proximate to said oxide barrier; and

said magnetic memory cell being programmed by steering of current toward said programmable area.

2. The magnetic memory cell as recited in claim 1 wherein said second conductor M 2 is formed of a magnetic material.

3. The magnetic memory cell as recited in claim 1 wherein said second conductor M 2 is formed of a non-magnetic material.

4. The magnetic memory cell as recited in claim 1 wherein said second conductor M 2 is formed of Tantalum.

5. The magnetic memory cell as recited in claim 1 wherein said magnetic memory cell is programmed in at least one of its magnetization states by a spin-biased steered current.

6. The magnetic memory cell as recited in claim 1 wherein said magnetic memory cell is programmed in one of its magnetization states by a spin-biased tunneling current.

7. The magnetic memory cell as recited in claim 1 wherein a magnetization state of said magnetic memory cell is sensed in a readout operation with steered currents.

8. The magnetic memory cell as recited in claim 1 wherein a magnetization state of said magnetic memory cell is sensed in a readout operation with tunneling current.

9. A method for implementing magnetic memory cell comprising:

providing a first conductor M 1 and a second conductor M 2 ;

forming said first conductor M 1 of a magnetic material, and

providing said second conductor M 2 being more electrically conductive than said first conductor M 1 , with said first conductor M 1 , and said second conductor M 2 being unpatterned;

providing an oxide barrier directly in contact with a wordline and the first conductor M 1 , said oxide barrier disposed between said first conductor M 1 and the wordline;

providing a programmable area of said magnetic memory cell using unpatterned programmable magnetic media disposed proximate to said oxide barrier; and

programming said magnetic memory cell by steering of current toward said programmable area.

10. The method as recited in claim 9 includes forming said second conductor M 2 of a magnetic material.

11. The method as recited in claim 9 includes forming said second conductor M 2 of a magnetic material.

12. The method as recited in claim 9 includes forming said second conductor M 2 of Tantalum.

13. The method as recited in claim 9 includes programming said magnetic memory cell in at least one of its magnetization states by a spin-biased steered current.

14. The method as recited in claim 9 includes programming said magnetic memory cell in one of its magnetization states by a spin-biased tunneling current.

15. The method as recited in claim 9 includes sensing a magnetization state of said magnetic memory cell in a readout operation with steered currents.

16. The method as recited in claim 9 includes sensing a magnetization state of said magnetic memory cell in a readout operation with tunneling currents.

17. The method as recited in claim 9 includes programming said magnetic memory cell in one of its magnetization states by a combination of one of a spin-biased steered current and a spin-biased tunneling current.

Assignments (12)