Patents by Inventor Chang Hak Choi

Chang Hak Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210104362
    Abstract: A multilayer capacitor includes a body including a plurality of dielectric layers and a plurality of first and second internal electrodes alternately exposed to opposing surfaces of the body in a length direction with respective dielectric layers interposed therebetween, and first and second external electrodes disposed at opposing ends of the body in the length direction and connected to the first and second internal electrodes, respectively. The plurality of first and second internal electrodes include nickel (Ni) and antimony (Sb) or germanium (Ge).
    Type: Application
    Filed: November 25, 2020
    Publication date: April 8, 2021
    Inventors: Dong Jin KIM, Chang Hak CHOI, Byung Chul JANG, Jin Kyung PARK
  • Patent number: 10965007
    Abstract: An antenna module includes a substrate having a first surface including a ground region and a feeder region; chip antennas mounted on the first surface of the substrate; and at least one patch antenna disposed inside of the substrate or at least partially disposed on a second surface of the substrate. The chip antennas include a body portion, a ground portion bonded to a first surface of the body portion, and a radiation portion bonded to a second surface of a body portion. The ground portion of each chip antenna is mounted on the ground region and the radiation portion of each chip antenna is mounted on the feeder region.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: March 30, 2021
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Yeong Kim, Sung Yong An, Chang Hak Choi
  • Publication number: 20210074481
    Abstract: A multilayer electronic component has a body and a non-conductive resin layer. The non-conductive resin layer includes a body cover portion disposed in a region of an external surface of the body in which an electrode layer of an external electrode is not disposed, and an extending portion extending from the body cover portion between the electrode layer and a conductive resin layer of the external electrode, to thereby suppress arc discharge, improve bending strength, and improve moisture resistance.
    Type: Application
    Filed: March 30, 2020
    Publication date: March 11, 2021
    Inventors: Jae Seok YI, Jung Min KIM, Bon Seok KOO, Chang Hak CHOI, Il Ro LEE, Byung Woo KANG, San KYEONG, Hae Sol KANG
  • Publication number: 20210065981
    Abstract: A multilayer electronic component includes a body including a dielectric layer and an internal electrode; and an external electrode including an electrode layer disposed on the body and connected to the internal electrode and a conductive resin layer disposed on the electrode layer, and the conductive resin layer includes a metal wire, a conductive metal, and a base resin.
    Type: Application
    Filed: March 31, 2020
    Publication date: March 4, 2021
    Inventors: Jun Hyeon Kim, Hae Sol Kang, Bon Seok Koo, San Kyeong, Chang Hak Choi, Jung Min Kim
  • Publication number: 20210057160
    Abstract: A multilayer capacitor includes a capacitor body including a dielectric layer and a plurality of internal electrodes, and external electrodes disposed on both ends of the capacitor body and connected to exposed portions of the plurality of internal electrodes, respectively. Each of the external electrodes includes a conductive layer disposed on the capacitor body to be connected to one or more of the plurality of internal electrodes, a conductive resin layer covering the conductive layer, and including a plurality of metal particles, a plurality of elastic fine powder particles each having an elastic powder particle and a metal film plated on a surface of the elastic powder particle, and a conductive resin surrounding the plurality of metal particles and the plurality of elastic fine powder particles and contacting the conductive layer, and a plating layer covering the conductive resin layer.
    Type: Application
    Filed: May 15, 2020
    Publication date: February 25, 2021
    Inventors: San Kyeong, Chang Hak Choi, Jae Seok Yi, Bon Seok Koo, Jung Min Kim, Hae Sol Kang, Jun Hyeon Kim
  • Patent number: 10923822
    Abstract: A wireless communications antenna includes: a magnetic body including one or more slits formed therein; and a coil part having solenoid form and disposed around the magnetic body, wherein the one or more slits are configured such that the magnetic body is not disconnected and a magnetic path of the magnetic body is continuous.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: February 16, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Tae Jun Choi, Jung Young Cho, Seung Hee Oh, Sung Nam Cho, Chang Hak Choi
  • Publication number: 20200411239
    Abstract: A dielectric ceramic composition includes a base material main component of barium titanate and a subcomponent. A microstructure of the dielectric ceramic composition after sintering includes a first grain having a Ca content of less than 3.5 at % and a second grain having a Ca content of 3.5 to 13.5 at %, and an area ratio of the second grain to an area of the total grains is 70% to 95%.
    Type: Application
    Filed: January 30, 2020
    Publication date: December 31, 2020
    Inventors: Seok Hyun YOON, Chan Hee NAM, Song Je JEON, Chang Hak CHOI
  • Patent number: 10879001
    Abstract: A multilayer capacitor includes a body including a plurality of dielectric layers and a plurality of first and second internal electrodes alternately exposed to opposing surfaces of the body in a length direction with respective dielectric layers interposed therebetween, and first and second external electrodes disposed at opposing ends of the body in the length direction and connected to the first and second internal electrodes, respectively. The plurality of first and second internal electrodes include nickel (Ni) and antimony (Sb) or germanium (Ge).
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: December 29, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dong Jin Kim, Chang Hak Choi, Byung Chul Jang, Jin Kyung Park
  • Patent number: 10770234
    Abstract: A multilayer capacitor may have a decreased equivalent series resistance (ESR) and improved warpage strength and reliability with conductive resin layers of external electrodes on surfaces where internal electrodes are exposed from a body, intermetallic compounds are in contact with conductive connecting portions of the conductive resin layers and the internal electrodes, and conductive connecting portions are in contact with a plurality of metal particles and second electrode layers.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: September 8, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jung Min Kim, Bon Seok Koo, Chang Hak Choi, Hae Sol Kang, Ji Hye Han, Byung Woo Kang
  • Patent number: 10770230
    Abstract: A multilayer ceramic capacitor includes a body including a dielectric layer and first and second internal electrodes, and external electrodes disposed on at least one surface of the body. The external electrodes each includes an electrode layer in contact with the first or second internal electrodes, an intermediate layer disposed on the electrode layer and including a first intermetallic compound, and a conductive resin layer disposed on the intermediate layer and including a plurality of metal particles, a second intermetallic compound and a base resin.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: September 8, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Kun Hoi Koo, Bon Seok Koo, Jung Min Kim, Jun Hyeon Kim, Hae Sol Kang, Soung Jin Kim, Ji Hye Han, Byung Woo Kang, Chang Hak Choi
  • Publication number: 20200273621
    Abstract: A multilayered capacitor includes a shock absorbing layer disposed between an upper layer of a capacitor body and a conductive resin layer of an external electrode and between a lower layer of the capacitor body and the conductive resin layer of the external electrode. A length of the shock absorbing layer is longer than that of the conductive resin layer, thereby improving warpage strength characteristics of the capacitor body.
    Type: Application
    Filed: August 12, 2019
    Publication date: August 27, 2020
    Inventors: Jae Seok YI, Jung Min KIM, Chang Hak CHOI, Bon Seok KOO, Byung Woo KANG, Hae Sol KANG, San KYEONG, Jun Hyeon KIM
  • Patent number: 10726996
    Abstract: A multilayer ceramic capacitor includes a body including a dielectric layer and internal electrodes with external electrodes disposed on one surface of the body, wherein the external electrodes include a first electrode layer disposed on one surface of the body, in contact with the internal electrodes, and including titanium nitride (TiN), and a second electrode layer disposed on the first electrode layer.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: July 28, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seung Hun Han, Dong Joon Oh, Sung Min Cho, Chang Hak Choi, Seung Mo Lim, Woong Do Jung
  • Patent number: 10692648
    Abstract: A magnetic field shielding structure includes a magnetic layer and a resonance reactive shielding circuit including a capacitor and a conductor connected to the capacitor and having a loop form. At least a portion of the magnetic layer overlaps an area surrounded by the conductor in a thickness direction of the magnetic layer.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: June 23, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Seung Hee Oh, Doo Ho Park, Tae Jun Choi, Sung Nam Cho, Chang Hak Choi, Jung Young Cho
  • Patent number: 10692638
    Abstract: A magnetic sheet includes one or more magnetic layers formed of a metal ribbon, the metal ribbon includes fragments with metal oxide coating layers formed in spaces between the fragments.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: June 23, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jung Young Cho, Tai Yon Cho, Sung Nam Cho, Chang Hak Choi, San Kyeong
  • Publication number: 20200168388
    Abstract: A coil component includes: a body including a magnetic material and a coil of which both ends are externally exposed; intermetallic compounds disposed on the exposed both ends of the coil; and external electrodes disposed on the body to cover the intermetallic compounds. The external electrodes include: conductive resin layers disposed on outer surfaces of the body to contact the exposed both ends of the coil and including base resins, a plurality of metal particles disposed in the base resins, and conductive connecting parts surrounding the plurality of metal particles and contacting the intermetallic compounds. The coil component further includes electrode layers disposed on the conductive resin layers and contacting the conductive connecting parts.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 28, 2020
    Inventors: Yoon Hee LEE, Bon Seok KOO, Yeon Tae KIM, Chang Hak CHOI, Jung Min KIM
  • Patent number: 10658104
    Abstract: A magnetic sheet includes a first region and a second region disposed adjacent to each other on a same surface, wherein the first region includes first crack lines formed in a first direction, and the second region includes second crack lines formed in a second direction.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: May 19, 2020
    Assignee: WITS Co., Ltd.
    Inventors: San Kyeong, Doo Ho Park, Jung Young Cho, Chang Hak Choi
  • Patent number: 10607776
    Abstract: A multilayer ceramic electronic component includes a ceramic body in which dielectric layers and internal electrodes are alternately stacked. The dielectric layers contain at least one dielectric grain having a ratio of a long axis to a short axis that is 3.5 or more. The internal electrodes contain a ceramic component containing a grain growth adjusting ingredient for dielectric grains. Each dielectric layer includes interfacial portions adjacent to the internal electrodes and a central portion disposed between the interfacial portions, and concentrations of the grain growth adjusting ingredient in the interfacial portions and the central portion are different from each other.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: March 31, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Kum Jin Park, Chang Hak Choi, Jong Hoon Yoo, Doo Young Kim, Min Gi Sin, Chi Hwa Lee, Chul Seung Lee, Jong Han Kim
  • Patent number: 10580576
    Abstract: A multilayer ceramic electronic component includes: a body part including dielectric layers and internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and external electrodes disposed on an outer surface of the body part and electrically connected to the internal electrodes. The dielectric layer includes grains including: a semiconductive or conductive grain core region containing a base material represented by ABO3, where A is at least one of Ba, Sr, and Ca, and B is at least one of Ti, Zr, and Hf, and a doping material including a rare earth element; and an insulating grain shell region enclosing the grain core region.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: March 3, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jin Woo Kim, Chang Hak Choi, Kang Heon Hur, Seok Hyun Yoon, Seung Ho Lee
  • Patent number: 10580567
    Abstract: A coil component includes: a body including a magnetic material and a coil of which both ends are externally exposed; intermetallic compounds disposed on the exposed both ends of the coil; and external electrodes disposed on the body to cover the intermetallic compounds. The external electrodes include: conductive resin layers disposed on outer surfaces of the body to contact the exposed both ends of the coil and including base resins, a plurality of metal particles disposed in the base resins, and conductive connecting parts surrounding the plurality of metal particles and contacting the intermetallic compounds. The coil component further includes electrode layers disposed on the conductive resin layers and contacting the conductive connecting parts.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 3, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Yoon Hee Lee, Bon Seok Koo, Yeon Tae Kim, Chang Hak Choi, Jung Min Kim
  • Patent number: 10580584
    Abstract: A multilayer ceramic capacitor includes a body including first and second dielectric layers and having first to sixth surfaces; a second internal electrode disposed on the second dielectric layer to face the first internal electrode with the first or second dielectric layer interposed therebetween, exposed to the fourth, fifth, and sixth surfaces, and disposed to be spaced apart from the third surface by a second space; a first dielectric pattern disposed in at least a portion of the first space; a second dielectric pattern disposed in at least a portion of the second space; a side insulating layer disposed on the fifth and sixth surfaces; a first external electrode disposed on the third surface; and a second external electrode disposed on the fourth surface, in which the first and second dielectric patterns have a color different from the first and second dielectric layers.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: March 3, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Tae Hoon Kim, Byung Kun Kim, Byung Chul Jang, Chang Hak Choi, Jung Deok Park