Global Patent Index - EP 1556862 A2

EP 1556862 A2 20050727 - MAGNETIC MEMORY DEVICE

Title (en)

MAGNETIC MEMORY DEVICE

Title (de)

MAGNETISCHE SPEICHERANORDNUNG

Title (fr)

DISPOSITIF A MEMOIRE MAGNETIQUE

Publication

EP 1556862 A2 20050727 (EN)

Application

EP 03758339 A 20031022

Priority

  • GB 0304552 W 20031022
  • US 27800502 A 20021022
  • US 27800802 A 20021022

Abstract (en)

[origin: WO2004038723A2] The invention relates to a magnetic memory cell for use in MRAM technology. The cell comprises a first ferromagnetic fixed (hereinafter FMF) layer with a first magnetic moment, a second FMF layer with a second magnetic moment, at least one ferromagnetic soft (hereinafter FMS) layer with a third magnetic moment, said FMS layer being arranged between the first and second FMF layers, a first non­magnetic intermediate layer arranged between said first FMF layer and said FMS layer, and a second non-magnetic intermediate layer arranged between said second FMF layer and said FMS layer. Said first intermediate layer is adapted to allow a spin-polarized write current to pass between said first FMF layer and said FMS layer, said write current having an amount sufficient to change a relative orientation of said first and third magnetic moments. Said second intermediate layer is adapted to influence the resistance between said second FMF layer and said FMS layers at a predetermined read voltage in dependence on a relative orientation of said second and third magnetic moments, said read voltage creating a spin-polarized current amount lower than said write current amount. Said first and second magnetic moments are in a predetermined parallel or antiparallel alignment relative to each other.

IPC 1-7

G11C 11/16

IPC 8 full level

G11C 11/00 (2006.01); G11C 11/16 (2006.01)

CPC (source: EP)

G11C 11/005 (2013.01); G11C 11/16 (2013.01); H10B 61/10 (2023.02)

Citation (search report)

See references of WO 2004038725A2

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2004038723 A2 20040506; WO 2004038723 A3 20050506; AU 2003274354 A1 20040513; AU 2003276387 A1 20040513; AU 2003276387 A8 20040513; EP 1556862 A2 20050727; EP 1559106 A2 20050803; WO 2004038725 A2 20040506; WO 2004038725 A3 20050506

DOCDB simple family (application)

GB 0304546 W 20031022; AU 2003274354 A 20031022; AU 2003276387 A 20031022; EP 03758339 A 20031022; EP 03809367 A 20031022; GB 0304552 W 20031022