Method for building a magnetic keeper or flux concentrator...

Details Method for building a magnetic keeper or flux concentrator... Method for building a magnetic keeper or flux concentrator...

2005-07-05

2005-07-05

Elms, Richard (Department: 2824)

Static information storage and retrieval

Systems using particular element

Magnetoresistive

C365S055000, C365S057000, C365S063000, C365S171000

Reexamination Certificate

active

06914805

ABSTRACT:
An MRAM device comprising an array of MRAM elements, with each element having an MRAM bit influenced by a magnetic field from a current flowing through a conductor, also includes a magnetic keeper formed adjacent the conductor to advantageously alter the magnetic field. The magnetic keeper alters the magnetic field by concentrating the field within the keeper thereby reducing the extent in which fringe field exists, thus allowing the MRAM elements to be formed closer to increase the areal density of the MRAM device. Increase in magnetic field flux due to the magnetic keeper allows operation of the MRAM device with lowered power. Soft magnetic materials such as nickel iron, nickel iron cobalt, or cobalt iron may be used to form the magnetic keeper.

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