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: 20200066436
    Abstract: A coil electronic component includes a body, in which a coil portion is embedded, including a plurality of magnetic particles, and an external electrode connected to the coil portion. Among the plurality of magnetic particles, at least a portion of magnetic particles include a first layer, disposed on a surface of a magnetic particle among the magnetic particles, and a second layer disposed on a surface of the first layer. The first layer is an inorganic coating layer containing a phosphorus (P) component, and the second layer is an atomic layer deposition layer.
    Type: Application
    Filed: April 30, 2019
    Publication date: February 27, 2020
    Inventors: Kyung Lock KIM, Byeong Cheol Moon, Chang Hak CHOI, Jeong Gu Yeo, Young Il Lee
  • Patent number: 10553949
    Abstract: A wireless communication antenna includes: a magnetic body including a plurality of bar-shaped unit ribbons arranged in columns, wherein the unit ribbons have shape anisotropy and a radiation direction on a side of the wireless communication antenna; and a solenoid coil including conductive patterns disposed around the magnetic body.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: February 4, 2020
    Assignee: WITS Co., Ltd.
    Inventors: Sung Nam Cho, Jung Young Cho, Jae Hyuk Jang, Chang Hak Choi, Jeong Ki Ryoo, Soon Kwang Kwon
  • Patent number: 10522285
    Abstract: A multilayer ceramic capacitor (MLCC) includes a body including first dielectric layers and second dielectric layers, the body including first to sixth surfaces, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface; first internal electrodes disposed on the first dielectric layers, exposed to the third surface, the fifth surface, and the sixth surface, and spaced apart from the fourth surface by first spaces; second internal electrodes disposed on the second dielectric layers to oppose the first internal electrodes with the first dielectric layers or the second dielectric layers interposed therebetween, exposed to the fourth surface, the fifth surface, and the sixth surface, and spaced apart from the third surface by second spaces; first dielectric patterns disposed in at least a portion of the first spaces, and second dielectric patterns disposed in at least a portion of the second spaces; and lateral insulating layers.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 31, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Moon Soo Park, Jae Hun Choe, Dong Hun Kim, Byung Chul Jang, Chang Hak Choi, Byung Kun Kim
  • Publication number: 20190362893
    Abstract: A multilayer ceramic capacitor (MLCC) includes a body including first dielectric layers and second dielectric layers, the body including first to sixth surfaces, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface; first internal electrodes disposed on the first dielectric layers, exposed to the third surface, the fifth surface, and the sixth surface, and spaced apart from the fourth surface by first spaces; second internal electrodes disposed on the second dielectric layers to oppose the first internal electrodes with the first dielectric layers or the second dielectric layers interposed therebetween, exposed to the fourth surface, the fifth surface, and the sixth surface, and spaced apart from the third surface by second spaces; first dielectric patterns disposed in at least a portion of the first spaces, and second dielectric patterns disposed in at least a portion of the second spaces; and lateral insulating layers.
    Type: Application
    Filed: August 9, 2019
    Publication date: November 28, 2019
    Inventors: Moon Soo PARK, Jae Hun CHOE, Dong Hun KIM, Byung Chul JANG, Chang Hak CHOI, Byung Kun KIM
  • Patent number: 10475574
    Abstract: A multilayer ceramic capacitor (MLCC) includes a body including first dielectric layers and second dielectric layers, the body including first to sixth surfaces, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface; first internal electrodes disposed on the first dielectric layers, exposed to the third surface, the fifth surface, and the sixth surface, and spaced apart from the fourth surface by first spaces; second internal electrodes disposed on the second dielectric layers to oppose the first internal electrodes with the first dielectric layers or the second dielectric layers interposed therebetween, exposed to the fourth surface, the fifth surface, and the sixth surface, and spaced apart from the third surface by second spaces; first dielectric patterns disposed in at least a portion of the first spaces, and second dielectric patterns disposed in at least a portion of the second spaces; and lateral insulating layers.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: November 12, 2019
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Moon Soo Park, Jae Hun Choe, Dong Hun Kim, Byung Chul Jang, Chang Hak Choi, Byung Kun Kim
  • Publication number: 20190311853
    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: October 25, 2018
    Publication date: October 10, 2019
    Inventors: Dong Jin KIM, Chang Hak CHOI, Byung Chul JANG, Jin Kyung PARK
  • Publication number: 20190259526
    Abstract: A coil component includes: a body having one surface and the other surface opposing each other in one direction; a coil portion including a coil pattern having at least one turn around the one direction, and embedded in the body; an external electrode disposed on the one surface of the body and connected to the coil portion; a shielding layer disposed on the other surface of the body; and an insulating layer disposed between the body and the shielding layer.
    Type: Application
    Filed: November 13, 2018
    Publication date: August 22, 2019
    Inventors: Tai Yon CHO, Tae Jun CHOI, Jung Young CHO, Chang Hak CHOI, Byeong Cheol MOON, Seung Hee OH
  • Publication number: 20190259529
    Abstract: A coil component includes: a body having a first surface and a second surface opposing each other in a thickness direction of the body and a wall surface connecting the first and second surfaces; a coil part including coil patterns and including at least one turn centered on the thickness direction; external electrodes disposed on the first surface of the body and electrically connected to the coil part; a shielding layer including a cap portion disposed on the second surface of the body and side wall portions disposed on the wall surface of the body and each having a first end connected to the cap portion; an insulating layer disposed between the body and the shielding layer; and a gap portion bounded by a second end of the shielding layer opposing the first end and the first surface of the body to expose portions of the wall surface.
    Type: Application
    Filed: November 1, 2018
    Publication date: August 22, 2019
    Inventors: Tai Yon CHO, Chang Hak CHOI, Byeong Cheol MOON, Sang Jong LEE, Hee Soo YOON, Tae Jun CHOI, Seung Hee OH, Su Bong JANG
  • Publication number: 20190252123
    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: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Inventors: Jung Min KIM, Bon Seok KOO, Chang Hak CHOI, Hae Sol KANG, Ji Hye HAN, Byung Woo KANG
  • Publication number: 20190237861
    Abstract: A chip antenna includes a radiation portion having a block shape and a first surface and a second surface opposing each other, and configured to receive and radiate a feed signal as an electromagnetic wave; a first block made of a dielectric material and coupled to the first surface of the radiation portion; a second block made of a dielectric material and coupled to the second surface of the radiation portion; a ground portion having a block shape and coupled to the first block, and configured to reflect the electromagnetic wave radiated by the radiation portion back toward the radiation portion; and a director having a block shape and coupled to the second block, wherein an overall width of the ground portion, the first block, and the radiation portion is 2 mm or less, and the first block has a dielectric constant of 3.5 or more to 25 or less.
    Type: Application
    Filed: November 9, 2018
    Publication date: August 1, 2019
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Yeong KIM, Sung Yong AN, Sang Jong LEE, Seong Hee CHOI, Kyu Bum HAN, Jeong Ki RYOO, Byeong Cheol MOON, Chang Hak CHOI
  • Publication number: 20190221351
    Abstract: An inductor includes a body including a coil and an encapsulant and an external electrode on an outer surface of the body. The encapsulant includes a first core surrounding the coil and a second core surrounding the first core. The first core includes a magnetic powder having high current characteristics, and the second core includes a magnetic powder having high capacity characteristics.
    Type: Application
    Filed: August 10, 2018
    Publication date: July 18, 2019
    Inventors: Jong Suk JEONG, Han Wool RYU, Seong Jae LEE, Sang Kyun KWON, Chang Hak CHOI
  • Publication number: 20190206622
    Abstract: A multilayer ceramic capacitor (MLCC) includes a body including first dielectric layers and second dielectric layers, the body including first to sixth surfaces, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface; first internal electrodes disposed on the first dielectric layers, exposed to the third surface, the fifth surface, and the sixth surface, and spaced apart from the fourth surface by first spaces; second internal electrodes disposed on the second dielectric layers to oppose the first internal electrodes with the first dielectric layers or the second dielectric layers interposed therebetween, exposed to the fourth surface, the fifth surface, and the sixth surface, and spaced apart from the third surface by second spaces; first dielectric patterns disposed in at least a portion of the first spaces, and second dielectric patterns disposed in at least a portion of the second spaces; and lateral insulating layers.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 4, 2019
    Inventors: Moon Soo Park, Jae Hun Choe, Dong Hun Kim, Byung Chul Jang, Chang Hak Choi, Byung Kun Kim
  • Publication number: 20190190120
    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: Application
    Filed: October 2, 2018
    Publication date: June 20, 2019
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Yeong KIM, Sung Yong AN, Chang Hak CHOI
  • Patent number: 10319527
    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: July 27, 2017
    Date of Patent: June 11, 2019
    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
  • Publication number: 20190173183
    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: Application
    Filed: June 19, 2018
    Publication date: June 6, 2019
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Tae Jun CHOI, Jung Young CHO, Seung Hee OH, Sung Nam CHO, Chang Hak CHOI
  • Publication number: 20190157006
    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: Application
    Filed: September 6, 2018
    Publication date: May 23, 2019
    Inventors: Seung Hun HAN, Dong Joon OH, Sung Min CHO, Chang Hak CHOI, Seung Mo LIM, Woong Do JUNG
  • Publication number: 20190122793
    Abstract: A coil component includes a body in which a coil portion is disposed, and external electrodes connected to the coil portion. The body includes metal particles formed of an Fe-based nanocrystal grain alloy, and the Fe-based nanocrystal grain alloy has one peak or two peaks in a differential scanning calorimetry (DSC) graph, and when the Fe-based nanocrystal grain alloy has the two peaks, a primary peak is smaller than a secondary peak, where the primary peak is at a lower temperature than the secondary peak.
    Type: Application
    Filed: June 20, 2018
    Publication date: April 25, 2019
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Kyun KWON, Han Wool RYU, Chang Hak CHOI
  • Publication number: 20190123422
    Abstract: An antenna device includes: a magnetic portion comprising a first surface and a second surface opposing the first surface; and a coil portion including a conductive wiring comprising a plurality of turns wound around the magnetic portion in a solenoid form, wherein in the coil portion, intervals between turns of the conductive wiring disposed on the first surface and intervals between turns of the conductive wiring disposed on the second surface are different from each other. Therefore, a recognition rate of the antenna device may be improved.
    Type: Application
    Filed: June 11, 2018
    Publication date: April 25, 2019
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Doo Ho PARK, San KYEONG, Tae Jun CHOI, Sung Nam CHO, Jung Young CHO, Chang Hak CHOI, Seung Hee OH
  • Patent number: 10269492
    Abstract: A multilayer ceramic electronic component and a method of manufacturing the same are provided. The multilayer ceramic electronic component includes: a ceramic body including dielectric layers; and internal electrodes disposed on the dielectric layers within the ceramic body and containing a ceramic material trapped therein. The ceramic material is a dielectric material doped with an additive.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: April 23, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kum Jin Park, Chang Hak Choi, Chi Hwa Lee, Min Gi Sin, Woo Sup Kim, Jong Hoon Yoo
  • Patent number: 10236125
    Abstract: A dielectric ceramic composition contains: a barium titanate-based powder as a main ingredient; a first accessory ingredient containing Na; a second accessory ingredient containing Ba; and a third accessory ingredient containing Si. A content of the first accessory ingredient (based on moles of Na) is 0.3 to 4.0 moles per 100 moles of the main ingredient, and a Ba/Si ratio is in a range of 0.16 to 1.44.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: March 19, 2019
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seok Hyun Yoon, Jung Deok Park, Chang Hak Choi, Dong Hun Kim, Seung Ho Lee, Chan Hee Nam