公开(公告)号：US20230124011A1

公开(公告)日：2023-04-20

申请号：US18061953

申请日：2022-12-05

Applicant: INSTITUTE OF MICROELECTRONICS OF THE CHINESE ACADEMY OF SCIENCES

Inventor： Guozhong XING ,  Huai LIN ,  Di WANG ,  Long LIU ,  Kaiping ZHANG ,  Guanya WANG ,  Yan WANG ,  Xiaoxin XU ,  Ming LIU

IPC: H04L9/32 ,  H10N50/10 ,  G11C11/16 ,  H10N50/85 ,  H01F10/32 ,  G11C11/14 ,  G06F7/58 ,  H10N50/80

Abstract: A reconfigurable PUF device based on fully electric field-controlled domain wall motion includes a voltage control layer, upper electrodes, a lower electrode, antiferromagnetic pinning layers, and a magnetic tunnel junction (MTJ). The MTJ includes, from bottom to top, a ferromagnetic reference layer, a potential barrier tunneling layer and a ferromagnetic free layer. In the device, an energy potential well is formed in a middle portion of the ferromagnetic free layer by applying a voltage to the voltage control layer to control magnetic anisotropy, and a current is fed into either of the upper electrodes to drive generation of the magnetic domain walls and pin the magnetic domain walls to the potential well. After the voltage is removed, the potential well is lowered so that the magnetic domain walls are in a metastable state, thereby either a high resistance state or a low resistance state is randomly obtained.

公开(公告)号：US20230046423A1

公开(公告)日：2023-02-16

申请号：US17821783

申请日：2022-08-23

Applicant: INSTITUTE OF MICROELECTRONICS OF THE CHINESE ACADEMY OF SCIENCES

Inventor： Guozhong XING ,  Long LIU ,  Di WANG ,  Huai LIN ,  Ming LIU

IPC: G11C11/16 ,  G11C11/54

Abstract: A magnetoresistive memory cell includes a first magnetic tunnel junction, a second magnetic tunnel junction and a metal layer. The first magnetic tunnel junction and the second magnetic tunnel junction each are disposed on the metal layer; the metal layer is configured to pass write current, a projection line of an easy axis of the first magnetic tunnel junction on a plane where the metal layer is located forms a first angle against a direction of the write current, and a projection line of an easy axis of the second magnetic tunnel junction on the plane where the metal layer is located forms a second angle against a direction opposite to the direction of the write current; the first angle and the second angle are all less than 90°; the first magnetic tunnel junction and the second magnetic tunnel junction are configured to pass read current.