Patent ID: 9548094
Date: 2017-01-17
CPC Classifications: G11C

Claim:
1. A method for reading a MRAM cell including a magnetic element comprising a soft ferromagnetic layer having a magnetization that can be freely aligned; a first hard ferromagnetic layer having a first storage magnetization; a first tunnel barrier layer comprised between the soft ferromagnetic layer and the a first hard ferromagnetic layer; a second hard ferromagnetic layer having a second storage magnetization; and a second tunnel barrier layer comprised between the soft ferromagnetic layer and the second hard ferromagnetic layer; the first storage magnetization being be freely orientable at a first high predetermined temperature threshold and the second storage magnetization being freely orientable at a second predetermined high temperature threshold; the first high predetermined temperature threshold being higher than the second predetermined high temperature threshold; the method comprising: measuring an initial resistance value of the magnetic element with the stored data; providing a first search data to the sense layer and determining the matching between the first search data and the stored data; and providing a second search data to the sense layer and determining the matching between the second search data and the stored data.