Patent ID: 8804413
Filing Date: 2014-08-12
Classification: G11C,H01L

Abstract:
1. A multi-free layer magnetic tunnel junction (MTJ) cell comprising: a bottom electrode layer; an anti-ferromagnetic (AFM) layer on the bottom electrode layer; a fixed magnetization layer on the anti-ferromagnetic layer; a barrier layer on the fixed magnetization layer; a first free magnetization layer on a first area of the barrier layer; a second free magnetization layer on a second area of the barrier layer, laterally displaced from the first area; a first top electrode coupled to the first free magnetization layer and a second top electrode coupled to the second free magnetization layer; a first read/write terminal coupled to a first bit/select line; a first current switch configured to receive a first control line signal switchable between an ON voltage and an OFF voltage and, in response, to respectively switch between coupling and not coupling the first top electrode to the first read/write terminal; a second read/write terminal coupled to a second bit/select line; a second current switch configured to receive a second control line signal switchable between an ON voltage and an OFF voltage and, in response, to respectively switch between coupling and not coupling the second top electrode to the second read/write terminal; a third read/write terminal coupled to a third bit/select line; and a third current switch configured to receive a third control line signal switchable between an ON voltage and an OFF voltage and, in response, to respectively switch between coupling and not coupling the bottom electrode layer to the third read/write terminal.