US 12,439,828 B2
Spin-orbit torque device and manufacturing method thereof
Ji-Sung Lee, Suwon-si (KR); Joon-Hyun Kwon, Hwaseong-si (KR); Su-Jung Noh, Seoul (KR); Han-Saem Lee, Seoul (KR); Byong-Guk Park, Daejeon (KR); Jaimin Kang, Daejeon (KR); Jeong-Mok Kim, Daejeon (KR); and Soogil Lee, Daejeon (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed on Feb. 22, 2022, as Appl. No. 17/677,078.
Claims priority of application No. 10-2021-0129677 (KR), filed on Sep. 30, 2021.
Prior Publication US 2023/0096447 A1, Mar. 30, 2023
Int. Cl. H01L 43/08 (2006.01); G11C 11/16 (2006.01); H01F 10/32 (2006.01); H01L 27/22 (2006.01); H01L 43/10 (2006.01); H01L 43/12 (2006.01); H10B 61/00 (2023.01); H10N 50/01 (2023.01); H10N 50/10 (2023.01); H10N 50/85 (2023.01)
CPC H10N 50/10 (2023.02) [G11C 11/161 (2013.01); H01F 10/3286 (2013.01); H10B 61/00 (2023.02); H10N 50/01 (2023.02); H10N 50/85 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A spin-orbit torque for a physically unclonable functions (PUF) device, comprising:
a lower ferromagnetic layer;
a non-magnetic layer bonded to the lower ferromagnetic layer; and
an upper ferromagnetic layer bonded to the non-magnetic layer;
wherein the lower ferromagnetic layer has horizontal anisotropy and the upper ferromagnetic layer has anisotropy perpendicular to a plane direction of the upper ferromagnetic layer; and
wherein a ratio of magnetic domains with a magnetization direction of +x and magnetic domains with a magnetization direction of-x formed within the lower ferromagnetic layer is 50:50.