公开(公告)号：US12266333B2

公开(公告)日：2025-04-01

申请号：US17882883

申请日：2022-08-08

Applicant: Seoul National University R&DB Foundation ,  CENTER FOR ADVANCED META-MATERIALS

Inventor： Jeseung Lee ,  Jooa Park ,  Yoon Young Kim

IPC: G01K11/02 ,  G01N29/28 ,  G10K11/02 ,  H04R1/30 ,  H04R1/32

Abstract: An exemplary embodiment provides matching media for perfect transmission of ultrasonic waves by easily implementing perfect transmission of ultrasonic waves at a boundary between different elastic media through a matching layer provided at the boundary between the different elastic media and proposes a matching layer having a single layer structure of a simple single pattern that is easily processed, thereby easily implementing effects such as miniaturization of the matching layer, reduction of manufacturing cost, and improvement of manufacturability. The matching medium for perfect transmission of ultrasonic waves according to an exemplary embodiment includes a matching layer that is provided with a single pattern under a perfect transmission condition at a boundary between an incident medium and a transmission medium to perfectly transmit the ultrasonic waves incident from the incident medium to the transmission medium, wherein the matching layer forms a single pattern by controlling a plurality of predetermined design variables.

公开(公告)号：US12253202B2

公开(公告)日：2025-03-18

申请号：US17621222

申请日：2020-06-09

Applicant: CENTER FOR ADVANCED META-MATERIALS

Inventor： Jong Jin Park ,  Jun Hyuk Kwak ,  Hak Joo Lee ,  Tae In Choi ,  Min Seok Jung

IPC: F16L55/033

Abstract: A fluid silencer includes: an expansion pipe disposed on a pipe through which a fluid containing noise sources flows and having an accommodation space therein; a viscous fluid received in the accommodation space; a noise introducing member disposed between the pipe and the expansion pipe to seal the accommodation space and allowing the noise sources to be introduced into the accommodation space therethrough; at least one partition member disposed in the accommodation space and dividing the accommodation space in a flow direction of the fluid; multiple baffle members disposed on one surface of the partition member and forming multiple sound absorbing spaces into which the noise sources introduced into the accommodation space are dispersedly introduced; and an elastic member disposed between the partition member and the baffle members and contracted/expanded by the viscous fluid entering/leaving the sound absorbing spaces as the noise sources are introduced into the sound absorbing spaces.

公开(公告)号：US12251926B2

公开(公告)日：2025-03-18

申请号：US18083592

申请日：2022-12-19

Applicant: CENTER FOR ADVANCED META-MATERIALS

Inventor： Bong Kyun Jang ,  Jae Hyun Kim ,  Se Jeong Won ,  Hak Joo Lee ,  Seung Mo Lee ,  Kwang Seop Kim

IPC: B41F16/02 ,  B41F16/00 ,  F16F1/00

Abstract: Disclosed herein are a metastructure having a zero elastic modulus zone, which can experience constant stress in a predetermined strain zone, and a method for designing the same. The metastructure includes a first unit and a second unit, wherein the first unit has a structure capable of buckling and has a stress-strain relation having a zone corresponding to a negative elastic modulus, the second unit is disposed adjacent to the first unit and has a stress-strain relation having a zone corresponding to a positive elastic modulus, and the metastructure has zero elastic modulus in a predetermined target strain zone through synthesis of the negative elastic modulus of the first unit with the positive elastic modulus of the second unit.

公开(公告)号：US12235243B2

公开(公告)日：2025-02-25

申请号：US17741524

申请日：2022-05-11

Applicant: CENTER FOR ADVANCED META-MATERIALS ,  PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION

Inventor： Jun Hyuk Kwak ,  Kyung Jun Song ,  Jong Jin Park ,  Hak Joo Lee

IPC: G10K11/00 ,  G01N29/24 ,  G01N29/28

Abstract: A cover unit includes: a body to which an ultrasound generator adapted to generate ultrasound is coupled; first slits disposed at a lower portion of the body in the form of multiple rings having different radii and spaced apart from each other, the first slits having a first width; second slits depressed from an upper surface of the body to communicate with the first slits and having a second width smaller than the first width; third slits depressed from the upper surface of the body and each disposed between adjacent second slits, the third slits having a third width smaller than the first width; a bottom formed under the first slits; a first sidewall formed between adjacent first slits; and a second sidewall formed between the second slit and the third slit.

公开(公告)号：US20240359997A1

公开(公告)日：2024-10-31

申请号：US18140949

申请日：2023-04-28

Applicant: KOREA INSTITUTE OF ENERGY RESEARCH ,  Center for Advanced Meta-Materials

Inventor： Hyun Uk KIM ,  Seong Ok HAN ,  Tae Woo KIM ,  Se Gi BYUN ,  Jung Joon YOO ,  IYAN SUBIYANTO ,  Hak Joo LEE

IPC: C01G23/00 ,  B82Y40/00

CPC classification number: C01G23/005 ,  B82Y40/00 ,  C01P2004/38 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present invention relates to lithium metal oxide nanoparticles and a method for preparing the same and provides lithium metal oxide nanoparticles each having a shape of a hexahedron with a square outer cross section or a hexahedron with at least one chamfered corner and comprising a hollow of which a cross section is a square or a square having at least one chamfered corner, and a method for preparing the same, so that the lithium metal oxide nanoparticles can be utilized as an electrode material of a next-generation electronic device in which a contact area between an electrode and an electrolyte is increased to improve the charge and discharge rate characteristics and improve the conductivity.

公开(公告)号：US20240282284A1

公开(公告)日：2024-08-22

申请号：US18571245

申请日：2022-11-01

Applicant: CENTER FOR ADVANCED META-MATERIALS

Inventor： Jae Hwa LEE ,  Tae In CHOI ,  Hak Joo LEE ,  Chee Young JOH

IPC: G10K11/02 ,  G01S7/521 ,  G01S15/06

CPC classification number: G10K11/02 ,  G01S7/521 ,  G01S15/06 ,  H10N30/101 ,  G10K2200/11

Abstract: A sound wave delivery structure of the present invention comprises unit structure cells each formed to have a cubic shape and comprising a column portion formed on a region corresponding to sides, and a space portion formed in an internal region surrounded by the column portion. There are a plurality of unit structure cells which are successively arranged in a first direction, in which sound waves are delivered, and a second direction crossing the first direction.

公开(公告)号：US11893971B2

公开(公告)日：2024-02-06

申请号：US17601955

申请日：2021-03-16

Applicant: CENTER FOR ADVANCED META-MATERIALS ,  JJNS CO., LTD.

Inventor： Jong Jin Park ,  Jun Hyuk Kwak ,  Hak Joo Lee

IPC: G10K11/172 ,  E04B1/86 ,  E04B1/84

CPC classification number: G10K11/172 ,  E04B1/86 ,  E04B2001/8414 ,  E04B2001/8452

Abstract: A sound insulation plate includes a patterned frame and an elastic membrane, wherein the patterned frame includes a central pattern region and multiple peripheral pattern regions arranged around the central pattern region, the multiple peripheral pattern regions being separated from the central pattern region by a separation bar, and wherein the elastic membrane is mounted on the patterned frame to block passage of air and converts airborne sound waves into elastic waves.

公开(公告)号：US11712674B2

公开(公告)日：2023-08-01

申请号：US17416518

申请日：2019-12-18

Applicant: CENTER FOR ADVANCED META-MATERIALS ,  KOREA INSTITUTE OF MACHINERY-MATERIALS

Inventor： Hyun June Jung ,  Jae Hyun Kim ,  Se Jeong Won ,  Jong Jin Park ,  Jun Hyuk Kwak ,  Hak Joo Lee ,  Bong Kyun Jang ,  Hyun Sung Park ,  Kyung Sik Kim

IPC: B01J8/00 ,  C01B32/184

CPC classification number: B01J8/008 ,  B01J8/001 ,  C01B32/184 ,  B01J2208/00017

Abstract: A graphene manufacturing device using Joule heating includes: a chamber having a space provided therein so as to synthesize graphene; and a first roller portion and a second roller portion disposed inside the chamber to be spaced from each other such that same support a catalyst metal penetrating the interior of the chamber and are supplied with an electric current for graphene synthesis, thereby Joule-heating the catalyst metal. In order to compensate for a temperature deviation of the catalyst metal passing between the first roller portion and the second roller portion, a first area of the catalyst metal, which is close to the first roller portion, and a second area of the catalyst metal, which is close to the second roller portion, are disposed to have movement paths facing each other.

公开(公告)号：US20230156994A1

公开(公告)日：2023-05-18

申请号：US18093333

申请日：2023-01-05

Applicant: CENTER FOR ADVANCED META-MATERIALS

Inventor： Kwang Seop KIM ,  Chan KIM ,  Min Ah YOON ,  Bong Kyun JANG ,  Min Sub OH ,  Jae Hyun KIM ,  Hyung Jun LIM ,  Se Jeong WON ,  Hak Joo LEE

IPC: H05K13/04 ,  H05K3/34 ,  B23K37/04

CPC classification number: H05K13/0486 ,  H05K3/34 ,  B23K37/0408 ,  B23K2101/42

Abstract: An apparatus for repairing elements, includes: a bonding material transfer stamp transferring a new bonding material to a repair area on a substrate, the repair area having a defective element or a residual bonding material removed therefrom; and an element transfer stamp transferring a new element to the new bonding material, wherein the element transfer stamp comprises a load control portion for elements, the load control portion being bent and deformed upon receiving pressing force such that a zero-stiffness load smaller than a critical damage load of the new element is applied to the new element.

公开(公告)号：US20230116960A1

公开(公告)日：2023-04-20

申请号：US18083592

申请日：2022-12-19

Applicant: CENTER FOR ADVANCED META-MATERIALS

Inventor： Bong Kyun JANG ,  Jae Hyun KIM ,  Se Jeong WON ,  Hak Joo LEE ,  Seung Mo LEE ,  Kwang Seop KIM

IPC: B41F16/00 ,  F16F1/00

Abstract: Disclosed herein are a metastructure having a zero elastic modulus zone, which can experience constant stress in a predetermined strain zone, and a method for designing the same. The metastructure includes a first unit and a second unit, wherein the first unit has a structure capable of buckling and has a stress-strain relation having a zone corresponding to a negative elastic modulus, the second unit is disposed adjacent to the first unit and has a stress-strain relation having a zone corresponding to a positive elastic modulus, and the metastructure has zero elastic modulus in a predetermined target strain zone through synthesis of the negative elastic modulus of the first unit with the positive elastic modulus of the second unit.