Patent ID: 9087983
Filing Date: 2015-07-21
Classification: G11C,H01L

Abstract:
1. A spin-transfer torque magnetoresistive memory comprising a control circuitry and at least one memory cell comprising: a digital line provided on a surface of a substrate serving as a bottom electrode; a dielectric functional layer provided on the top surface of the digital line layer; a recording layer provided on the top surface of the dielectric functional layer having a magnetic anisotropy and a variable magnetization direction and having an induced perpendicular anisotropy from a interface interaction with the functional layer; a tunnel barrier layer provided on the top surface of the recording layer; a reference layer provided on the top surface of the tunnel barrier having magnetic anisotropy and having a fixed magnetization direction; a cap layer provided on the top surface of the reference layer as an upper electric electrode; a middle electrode provided on sides of the recording layer and electrically connected to the recording layer; a bit line provided on the top surface of the cap layer; a select CMOS transistor coupled the middle electrode of magnetoresistive memory elements through a conductive VIA; The control circuitry coupled through the bit line, the digital line and the select transistor to selected ones of the plurality of magnetoresistive memory elements, The control circuitry further configured to provide a bi-directional spin-transfer recording current between the bit line and the select transistor and to provide a voltage on the digital line to generate an electric field on the dielectric functional layer to manipulate the induced perpendicular anisotropy in the recording layer in a recording operation, The control circuitry further configured to provide a reading current between the bit line and the select transistor in a reading operation.