Patent ID: 6404673
Filing Date: 2002-06-11
Classification: G11C

Abstract:
A magnetic memory device comprising a plurality of magnetic memory cells, each magnetic memory cell being formed to have at least three magnetic layers including a first magnetic layer, a second magnetic layer and a third magnetic layer laminated together, and each magnetic memory cell having a resistance that is different depending on directions of magnetic moments of the first, second and third magnetic layers, respectively, wherein said plurality of magnetic memory cells are laid out along crossings between a plurality of first lines and a plurality of second lines that cross said first lines, respectively, and the magnetic memory device selectively passes a predetermined current through said first lines and said second lines, and controls directions of magnetic moments of the first, second and third magnetic layers, thereby to write data into a specific magnetic memory cell,wherein each of said first lines comprises at least two word lines, and each of said word lines individually controls a direction of a magnetic moment of any one of the first, second and third magnetic layers, thereby to store data of two or more values in the specific magnetic layer.