Patent ID: 9502092
Filing Date: 2016-11-22
CPC Classification: G11C,H01L

Claim Text:
1. An MRAM device with a memory cell that includes a Magnetic Tunnel Junction (MTJ) coupled to a selecting device, including: the MTJ having at least one reference layer (RL) with a fixed perpendicular magnetization, at least one free layer (FL) with a switchable perpendicular magnetization, and a junction layer between the reference layer; a bit line connected to an electrode of the MTJ; and a word line connected to the selecting device, wherein a first write process switches the free layer magnetization from anti-parallel to the reference layer magnetization to parallel to the reference layer magnetization by applying a first voltage pulse having a first amplitude between the bit line and the word line; and wherein a second write process switches the free layer magnetization from parallel to the reference layer magnetization to anti-parallel to the reference layer magnetization by applying a second voltage pulse having a second amplitude between the bit line and the word line; the first and second voltage pulses inducing electrons to move from the reference layer to the free layer, and the second amplitude being higher than the first amplitude.