Magnetoresistive MTJ stack having an unpinned, fixed synthetic anti-ferromagnetic structure

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United States of America Patent

PATENT NO 9793468
SERIAL NO

15199862

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Abstract

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A magnetoresistive magnetic tunnel junction (MTJ) stack includes a free magnetic region, a fixed magnetic region, and a dielectric layer positioned between the free magnetic region and the fixed magnetic region. In one aspect, the fixed magnetic region consists essentially of an unpinned, fixed synthetic anti-ferromagnetic (SAF) structure which comprises (i) a first layer of one or more ferromagnetic materials, including cobalt, (ii) a multi-layer region including a plurality of layers of ferromagnetic materials, wherein the plurality of layers of ferromagnetic materials include a layer of one or more ferromagnetic materials including cobalt, and (iii) an anti-ferromagnetic coupling layer disposed between the first layer and the multi-layer region. The free magnetic region may include a circular shape, the one or more ferromagnetic materials of the first layer may include cobalt, iron and boron, and the dielectric layer may be disposed on the first layer.

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Patent Owner(s)

Patent OwnerAddress
EVERSPIN TECHNOLOGIES INC1300 N ALMA SCHOOL ROAD CHANDLER AS 85224

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akerman, Bengt J Sollentuna, SE 10 89
Janesky, Jason A Gilbert, US 18 247
Pietambaram, Srinivas V Gilbert, US 213 722
Rizzo, Nicholas D Gilbert, US 55 1894
Slaughter, Jon M Chandler, US 49 1406
Whig, Renu Chandler, US 52 697

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