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    SPIN-ORBIT TORQUE-BASED RANDOM NUMBER GENERATOR AND FABRICATING METHOD THEREOF
    25.
    发明申请
    SPIN-ORBIT TORQUE-BASED RANDOM NUMBER GENERATOR AND FABRICATING METHOD THEREOF 有权

    公开(公告)号：US20250147731A1

    公开(公告)日：2025-05-08

    申请号：US18777997

    申请日：2024-07-19

    Applicant: Korea University Research and Business Foundation ,  Korea Advanced Institute of Science and Technology

    Inventor： Young Keun KIM ,  Min Hyeok LEE ,  Seok In YOON ,  Kyung Jin LEE ,  Seok Jong KIM

    IPC: G06F7/58

    Abstract: The spin-orbit torque-based random number generator includes a spin torque generation layer including a first spin torque layer and a second spin torque layer, a magnetization-free layer, a tunnel barrier layer, and a magnetization pinned layer, wherein the second spin torque layer is disposed between the magnetization-free layer and the first spin torque layer and generates field-like torque (FLT) and damping-like torque (DLT) related to the magnetization direction of the magnetization-free layer; the first spin torque layer adjusts a torque ratio according to the size of field-like torque to the size of damping-like torque in conjunction with the thickness of the second spin torque layer; in the magnetization-free layer, a magnetization direction is randomly aligned up or down based on the adjusted torque ratio; and a random number is generated based on current that is switched and output based on the randomly aligned magnetization direction.

    METHODS AND DEVICES FOR ELECTROMAGNETIC WAVE ABSORPTION USING GRADIENT, COATED HONEYCOMB STRUCTURES
    27.
    发明申请
    METHODS AND DEVICES FOR ELECTROMAGNETIC WAVE ABSORPTION USING GRADIENT, COATED HONEYCOMB STRUCTURES 有权

    公开(公告)号：US20230041555A1

    公开(公告)日：2023-02-09

    申请号：US17392898

    申请日：2021-08-03

    Applicant: Khalifa University of Science and Technology ,  Korea University Research and Business Foundation

    Inventor： Daniel CHOI ,  Hammad YOUNES ,  Ru LI ,  Young Keun KIM

    IPC: H05K9/00 ,  C04B41/50 ,  C04B35/26

    Abstract: A device and method for absorbing electromagnetic waves can include a honeycomb sheet formed by a plurality of interconnected hexagon cells arranged in rows. The hexagon cells are made up of sidewalls, each sidewall formed by two surfaces that converge at a top of the sidewall and diverge from the top to a bottom of the sidewall such that a thickness of the sidewalls increases from top to bottom and an angle forms between the two surfaces at the top of the sidewall. In an example, the angle is about 8 degrees. The honeycomb sheet can be coated with a magnetic, composite coating to increase electromagnetic shielding. An example coating includes magnetic multi-granular nanoclusters (MGNC) and multi-walled carbon nanotubes (MWCNT). A base layer can be attached to the honeycomb sheet for mechanical stability and additional absorption. The device is suitable for radar absorbing materials (RAM) for aerospace and military applications.

    INORGANIC HOLLOW NANOCOILS AND METHOD OF MANUFACTURING THE SAME
    28.
    发明申请
    INORGANIC HOLLOW NANOCOILS AND METHOD OF MANUFACTURING THE SAME 有权

    公开(公告)号：US20230029603A1

    公开(公告)日：2023-02-02

    申请号：US17839966

    申请日：2022-06-14

    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

    Inventor： Young Keun KIM ,  Jun Hwan MOON

    IPC: C01B25/45 ,  C01B25/37

    Abstract: The present invention relates to hollow nanocoils having a three-dimensional helical structure in the form of a hollow tube and a method of manufacturing the same.
    The present invention provides a method of synthesizing metal nanocoils into inorganic hollow nanocoils using the galvanic replacement reaction and an electrochemical reaction including the Kirkendall effect. The inorganic hollow nanocoil structure body of the present invention can be applied to various fields such as sensors, catalysts, batteries, or gene delivery and therapy using a large surface area.

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