Patent ID: 7220599

Claim:
A method of manufacturing a magneto-resistive random access memory, the method comprising: (a) forming an isolation dielectric layer on a semiconductor substrate to form a device active region; (b) forming a first gate, a source area and a drain area in the device active region to form a MOS transistor; (c) forming a second gate parallel to the first gate and forming a lower electrode of a conductive material to be connected to the source area of the MOS transistor; (d) forming a first magnetic layer on the lower electrode to form a predetermined magnetic domain; (e) forming a dielectric barrier layer of at least hafnium and aluminum on the first magnetic layer by forming an aluminum-hafnium-oxide or a muti-layered film of aluminum/hafnium on the first magnetic layer; and (f) forming a second magnetic layer opposite the first magnetic layer on the barrier layer; and (g) forming an upper electrode on the second magnetic layer so that the upper electrode is electrically connected to the second magnetic layer.