Patent ID: 7209380
Filing Date: 2007-04-24
Classification: B82Y,G11C,H01L

Abstract:
1. A magnetic memory device including plural magnetoresistive devices each having a magneto-sensitive layer whose magnetization direction changes according to an external magnetic field and constructed so that each of storage cells includes a pair of magnetoresistive devices, comprising: a read line pair provided so as to extend in a first direction in each of the pairs of magnetoresistive devices and supplying a read current to the pair of magnetoresistive devices; a ground-side read line for guiding the read current passed through the pair of magnetoresistive devices to the ground; a constant current circuit commonly provided for plural ground-side read lines and making the sum of a pair of read currents passing through the pair of magnetoresistive devices in one storage cell constant; and a read circuit for reading information from the storage cell on the basis of the difference between the pair of read currents.