Patents Assigned to CENTER FOR ADVANCED META-MATERIALS
  • Publication number: 20200338545
    Abstract: Provided is a graphene production method using Joule heating, including: a catalytic metal placement step in which a catalytic metal is disposed on a pair of electrodes disposed inside a chamber; a gas supply step in which a carbon-containing reaction gas and a carrier gas for transporting the reaction gas are supplied into the chamber; a heating step in which the catalytic metal is rapidly heated to a temperature required for synthesis of graphene; a temperature maintenance step in which the temperature of the catalytic metal is maintained to form the graphene on the catalytic metal; and a cooling step in which the catalytic metal is cooled to prevent local occurrence of hotspots on the graphene formed on the catalytic metal, wherein the heating step, the temperature maintenance step, and the cooling step constitute one cycle of temperature control and the cycle is repeated for a predetermined process time.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 29, 2020
    Applicant: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Hyun June JUNG, Hak Joo LEE, Jae Hyun KIM, Bong Kyun JANG, Kwang Seop KIM, Se Jeong WON
  • Publication number: 20200331758
    Abstract: Provided are a graphene preparation apparatus, including: a chamber having a space for preparation of graphene; a first electrode and a second electrode disposed in the chamber to be separated a predetermined distance from each other, the first electrode and the second electrode supporting a catalytic metal and receiving electric current for preparation of the graphene to heat the catalytic metal using Joule heating; additional heaters disposed at opposite sides of the catalytic metal, respectively, and heating the catalytic metal to compensate for a temperature difference between both end regions and a central region of the catalytic metal heated using Joule heating induced by the first electrode and the second electrode; and a current supply unit supplying electric current to the first electrode and the second electrode.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 22, 2020
    Applicant: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Hyun June JUNG, Jae Hyun KIM, Choong Man MOON, Hak Joo LEE, Bong Kyun JANG, Kwang Seop KIM, Seung Mo LEE, Yun HWANGBO
  • Publication number: 20200331760
    Abstract: A nanomaterial ribbon patterning method includes: forming a first nanomaterial layer having a first threshold strain on an upper surface of a substrate; forming a second nanomaterial layer on an upper surface of the first nanomaterial layer; forming a thin layer having a second threshold strain smaller than the first threshold strain on an upper surface of the second nanomaterial layer; generating plural cracks on the thin layer and the second nanomaterial layer by applying tensile force to the substrate; placing a mask on an upper surface of the thin layer; removing the mask and peeling off the sacrificial layer on the upper surface of the thin layer; and removing the sacrificial layer to form a nanomaterial ribbon pattern.
    Type: Application
    Filed: December 10, 2018
    Publication date: October 22, 2020
    Applicant: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Se Jeong WON, Hyun June JUNG, Jae Hyun KIM, Kwang Seop KIM, Hak Joo LEE, Bong Kyun JANG
  • Publication number: 20200284660
    Abstract: One embodiment of the present invention provides an optical imaging apparatus using a metamaterial including a metamaterial array sensor which includes a plurality of unit cells made of a metamaterial and is positioned adjacent to an observation object, an imaging beam providing unit which provides an imaging beam toward the metamaterial array sensor, a control beam providing unit which controls a control beam provided to the unit cell to block the imaging beam incident on the unit cell, and an imaging beam measuring unit which measures a unit cell imaging beam transmission amount passing through the unit cell by measuring an imaging beam transmission amount of the metamaterial array sensor when the imaging beam passes through the unit cell and an imaging beam transmission amount of the metamaterial array sensor when the control beam is focused on the unit cell to block the imaging beam incident on the unit cell.
    Type: Application
    Filed: March 4, 2020
    Publication date: September 10, 2020
    Applicants: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Center for Advanced Meta-Materials
    Inventors: Minah SEO, Sang-Hun LEE, Chulki KIM, Jae Hun KIM, Taikjin LEE, Deok Ha WOO
  • Patent number: 10770426
    Abstract: A method for transferring a micro device, includes: a compression step in which a carrier film having a micro-device attached to an adhesive layer thereof is brought into contact with a substrate comprising a solder deposited on metal electrodes formed on the substrate and is compressed on the substrate; a first adhesive strength generation step in which the solder disposed between the micro-device and the metal electrodes is compressed in the compression step to generate first adhesive strength between the micro-device and the solder; a second adhesive generation step in which the micro-device is bonded to the adhesive layer through press-fitting in the compression step to generate second adhesive strength between the micro-device and the adhesive layer; and a release step in which the carrier film is separated from the substrate, with the micro-device adhered to the solder.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: September 8, 2020
    Assignee: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Yun Hwangbo, Byung Ik Choi, Jae Hyun Kim, Yeon Woo Jeong, Seong Min Hong, Bong Kyun Jang, Kwang Seop Kim, Kyung Sik Kim, Hak Joo Lee
  • Patent number: 10732151
    Abstract: A transducer complex includes a resonator for enhancing an output and a measurement sensitivity of a guided wave transducer. The transducer complex includes: an ultrasonic transducer attached onto a surface or inserted into an object, the ultrasonic transducer having a longer length in parallel with the surface of the object than a length in a direction perpendicular to the surface of the object and the ultrasonic transducer receiving electric power from an external power source to generate ultrasonic waves or receiving ultrasonic waves from outside to generate electricity; and the resonator attached to the object or the ultrasonic transducer or inserted into the object, the resonator being symmetrically arranged in parallel on the outside of the ultrasonic transducer to be adjacent to the ultrasonic transducer.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: August 4, 2020
    Assignees: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Center for Advanced Meta-Materials
    Inventors: Yoon Young Kim, Ki Yean Kim
  • Publication number: 20190259728
    Abstract: A method for transferring a micro device, includes: a compression step in which a carrier film having a micro-device attached to an adhesive layer thereof is brought into contact with a substrate comprising a solder deposited on metal electrodes formed on the substrate and is compressed on the substrate; a first adhesive strength generation step in which the solder disposed between the micro-device and the metal electrodes is compressed in the compression step to generate first adhesive strength between the micro-device and the solder; a second adhesive generation step in which the micro-device is bonded to the adhesive layer through press-fitting in the compression step to generate second adhesive strength between the micro-device and the adhesive layer; and a release step in which the carrier film is separated from the substrate, with the micro-device adhered to the solder.
    Type: Application
    Filed: August 21, 2017
    Publication date: August 22, 2019
    Applicant: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Yun HWANGBO, Byung Ik CHOI, Jae Hyun KIM, Yeon Woo JEONG, Seong Min HONG, Bong Kyun JANG, Kwang Seop KIM, Kyung Sik KIM, Hak Joo LEE