Patent ID: 6509621
Filing Date: 2003-01-21
Classification: B82Y,G11C,H01F,H01L

Abstract:
A magnetic random access memory, comprising:a word line extending in a first direction; a bit line extending in a second, different direction; and a tunneling magneto-resistive sensor provided between said word line and said bit line in a part where said word line and said bit line cross with each other, said tunneling magneto-resistive sensor comprising: a first ferromagnetic layer having a fixed magnetization; a second ferromagnetic layer having a variable magnetization; and a tunneling insulation film interposed between said first ferromagnetic layer and said second ferromagnetic layer, wherein said first ferromagnetic layer comprising a ferromagnetic material having a spin polarization of 0.9 or higher, and wherein said second ferromagnetic layer has a spin polarization of about 0.5 or less.