Patents by Inventor Ung Hwan Pi

Ung Hwan Pi 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: 20200152251
    Abstract: A magnetic memory device includes a first conductive line extending in a first direction on a substrate, a first magnetic pattern on the first conductive line, the first magnetic pattern including a first portion and a second portion that have different thicknesses, and a second conductive line on the first magnetic pattern and extending in a second direction intersecting the first direction.
    Type: Application
    Filed: August 27, 2019
    Publication date: May 14, 2020
    Inventors: Ki Woong KIM, Juhyun KIM, Se Chung OH, Ung Hwan PI
  • Publication number: 20200091412
    Abstract: A magnetic memory device, a method for manufacturing a magnetic memory device, and a substrate treating apparatus, the device including a substrate including a first memory region and a second memory region; a first magnetic tunnel junction pattern on the first memory region, the first magnetic tunnel junction pattern including a first free pattern and a first oxide pattern on the first free pattern; and a second magnetic tunnel junction pattern on the second memory region, the second magnetic tunnel junction pattern including a second free pattern and a second oxide pattern on the second free pattern, wherein a ratio of a thickness of the first oxide pattern to a thickness of the first free pattern is different from a ratio of a thickness of the second oxide pattern to a thickness of the second free pattern.
    Type: Application
    Filed: March 14, 2019
    Publication date: March 19, 2020
    Inventors: Joonmyoung LEE, Yong Sung PARK, Jeong-Heon PARK, Hyun CHO, Ung Hwan PI
  • Publication number: 20200082858
    Abstract: A semiconductor device includes a storage layer including at least one first magnetic layer and a reference layer facing the storage layer and including at least one second magnetic layer. The device also includes a tunnel barrier layer between the storage layer and the reference layer. The device further includes at least one spin-orbit torque line adjacent the storage layer.
    Type: Application
    Filed: March 29, 2019
    Publication date: March 12, 2020
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: JAE HOON KIM, Hee Ju Shin, Ung Hwan Pi
  • Patent number: 10553790
    Abstract: A magnetic memory device includes a first magnetic tunnel junction pattern on a substrate, a second magnetic tunnel junction pattern on the first magnetic tunnel junction pattern, and a conductive line between the first magnetic tunnel junction pattern and the second magnetic tunnel junction pattern. The conductive line is configured such that a current flowing through the conductive line flows in parallel to an interface between the conductive line and each of the first and second magnetic tunnel junction patterns.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: February 4, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joonmyoung Lee, Ung Hwan Pi, Eunsun Noh, Yong Sung Park
  • Patent number: 10128433
    Abstract: Provided is a magnetic memory device. The magnetic memory device includes a first magnetization layer, a tunnel barrier disposed on the first magnetization layer, a second magnetization layer disposed on the tunnel barrier, and a spin current assisting layer disposed on at least a portion of a sidewall of the second magnetization layer.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 13, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ung-hwan Pi, Kwang-seok Kim, Kee-won Kim, Sung-chul Lee, Young-man Jang
  • Patent number: 9570675
    Abstract: Magnetoresistive structures, magnetic random-access memory devices including the same, and methods of manufacturing the magnetoresistive structure, include a first magnetic layer having a magnetization direction that is fixed, a second magnetic layer corresponding to the first magnetic layer, wherein a magnetization direction of the second magnetic layer is changeable, and a magnetoresistance (MR) enhancing layer and an intermediate layer both between the first magnetic layer and the second magnetic layer.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: February 14, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kee-won Kim, Kwang-seok Kim, Sung-chul Lee, Young-man Jang, Ung-hwan Pi
  • Publication number: 20170040529
    Abstract: Provided is a magnetic memory device. The magnetic memory device includes a first magnetization layer, a tunnel barrier disposed on the first magnetization layer, a second magnetization layer disposed on the tunnel barrier, and a spin current assisting layer disposed on at least a portion of a sidewall of the second magnetization layer.
    Type: Application
    Filed: October 24, 2016
    Publication date: February 9, 2017
    Inventors: Ung-hwan PI, Kwang-seok KIM, Kee-won KIM, Sung-chul LEE, Young-man JANG
  • Patent number: 9530478
    Abstract: A memory device using a spin hall effect, and methods of manufacturing and operating the memory device, include applying a first operational current to a bit line of the memory device such that a spin current is applied to a magnetic tunnel junction (MTJ) cell coupled to the bit line due to a material in the bit line, wherein the bit line is electrically connected to a word line via the MTJ cell, and the word line intersects the bit line.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: December 27, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ung-hwan Pi, Kwang-seok Kim, Kee-won Kim, Sung-chul Lee, Young-man Jang
  • Patent number: 9508925
    Abstract: Provided is a magnetic memory device. The magnetic memory device includes a first magnetization layer, a tunnel barrier disposed on the first magnetization layer, a second magnetization layer disposed on the tunnel barrier, and a spin current assisting layer disposed on at least a portion of a sidewall of the second magnetization layer.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: November 29, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ung-hwan Pi, Kwang-seok Kim, Kee-won Kim, Sung-chul Lee, Young-man Jang
  • Patent number: 9437654
    Abstract: Magnetic memory devices may include a substrate, a circuit device on the substrate, a plurality of lower electrodes electrically connected to the circuit device, a magnetic tunnel junction (MTJ) structure commonly provided on the plurality of the lower electrodes, and a plurality of upper electrodes on the MTJ structure. The MTJ structure may include a plurality of magnetic material patterns and a plurality of insulation material patterns separating the magnetic material patterns from each other.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: September 6, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Chul Lee, Kwang-Seok Kim, Kee-Won Kim, Young-Man Jang, Ung-Hwan Pi
  • Publication number: 20160093669
    Abstract: Magnetic memory devices may include a substrate, a circuit device on the substrate, a plurality of lower electrodes electrically connected to the circuit device, a magnetic tunnel junction (MTJ) structure commonly provided on the plurality of the lower electrodes, and a plurality of upper electrodes on the MTJ structure. The MTJ structure may include a plurality of magnetic material patterns and a plurality of insulation material patterns separating the magnetic material patterns from each other.
    Type: Application
    Filed: May 19, 2015
    Publication date: March 31, 2016
    Inventors: Sung-Chul LEE, Kwang-Seok KIM, Kee-Won KIM, Young-Man JANG, Ung-Hwan PI
  • Publication number: 20160079518
    Abstract: Provided is a magnetic memory device. The magnetic memory device includes a first magnetization layer, a tunnel barrier disposed on the first magnetization layer, a second magnetization layer disposed on the tunnel barrier, and a spin current assisting layer disposed on at least a portion of a sidewall of the second magnetization layer.
    Type: Application
    Filed: August 3, 2015
    Publication date: March 17, 2016
    Inventors: Ung-hwan PI, Kwang-seok KIM, Kee-won KIM, Sung-chul LEE, Young-man JANG
  • Patent number: 9236105
    Abstract: Magnetic memory devices include a magnetoresistive cell including a free layer having a variable magnetization direction and a pinned layer having a fixed magnetization direction, a bit line on the magnetoresistive cell and including a spin Hall effect material layer exhibiting a spin Hall effect and contacting the free layer; and a lower electrode under the magnetoresistive cell. A voltage is applied between the bit line and the lower electrode so that current passes through the magnetoresistive cell.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: January 12, 2016
    Assignee: Samsung Electornics Co., Ltd.
    Inventors: Ung-hwan Pi, Kwang-seok Kim, Kee-won Kim, Sung-chul Lee, Young-man Jang
  • Patent number: 9230623
    Abstract: Magnetic memory devices, and methods of operating the same, include a magnetoresistive element including a free layer, a pinned layer, and a separation layer between the free layer and the pinned layer. The devices, and methods, further include a first conductive line connected to the free layer and configured to apply a Rashba field to, or induce the Rashba field in, the free layer, and a second conductive line spaced apart from the free layer and configured to apply an external magnetic field to the free layer. A magnetization direction of the free layer is switchable by application of the Rashba field and the external magnetic field to the free layer.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: January 5, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kwang-seok Kim, Ung-hwan Pi, Kee-won Kim, Sung-chul Lee, Young-man Jang
  • Publication number: 20140339660
    Abstract: Provided are magnetoresistive elements, memory devices including the same, and an operation methods thereof. A magnetoresistive element may include a free layer, and the free layer may include a plurality of regions (layers) having different properties. The free layer may include a plurality of regions (layers) having different Curie temperatures. The Curie temperature of the free layer may change regionally or gradually away from the pinned layer. The free layer may include a first region having ferromagnetic characteristics at a first temperature and a second region having paramagnetic characteristics at the first temperature. The first region and the second region both may have ferromagnetic characteristics at a second temperature lower than the first temperature. The effective thickness of the free layer may change with temperature.
    Type: Application
    Filed: April 7, 2014
    Publication date: November 20, 2014
    Inventors: Sung-chul LEE, Kwang-seok KIM, Kee-won KIM, Young-man JANG, Ung-hwan PI
  • Patent number: 8848432
    Abstract: Magnetoresistive elements, and memory devices including the same, include a free layer having a changeable magnetization direction, a pinned layer facing the free layer and having a fixed magnetization direction, and an auxiliary element on a surface of the pinned layer. The auxiliary element has a width smaller than a width of the pinned layer, and a magnetization direction fixed to a direction the same as a direction of the fixed magnetization direction of the pinned layer.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: September 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-chul Lee, Kwang-seok Kim, Kee-won Kim, Young-man Jang, Ung-hwan Pi
  • Patent number: 8847692
    Abstract: Oscillators and method of operating the same are provided, the oscillators include a magnetic layer, and a magnetization fixing element configured to fix a magnetization direction of the magnetic layer. The oscillators generate a signal by using precession of a magnetic moment of the magnetic layer.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: September 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ung-hwan Pi, Sun-ae Seo, Kee-won Kim, In-jun Hwang, Kwang-seok Kim, Sung-chul Lee
  • Publication number: 20140269036
    Abstract: Magnetic memory devices include a magnetoresistive cell including a free layer having a variable magnetization direction and a pinned layer having a fixed magnetization direction, a bit line on the magnetoresistive cell and including a spin Hall effect material layer exhibiting a spin Hall effect and contacting the free layer; and a lower electrode under the magnetoresistive cell. A voltage is applied between the bit line and the lower electrode so that current passes through the magnetoresistive cell.
    Type: Application
    Filed: February 19, 2014
    Publication date: September 18, 2014
    Inventors: Ung-hwan PI, Kwang-seok KIM, Kee-won KIM, Sung-chul LEE, Young-man JANG
  • Patent number: 8836057
    Abstract: Magnetoresistive elements, and memory devices including the same, include a pinned layer having a fixed magnetization direction, a free layer corresponding to the pinned layer, and a protruding element protruding from the free layer and having a changeable magnetization direction. The free layer has a changeable magnetization direction. The protruding element is shaped in the form of a tube. The protruding element includes a first protruding portion and a second protruding portion protruding from ends of the free layer facing in different directions.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: September 16, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-chul Lee, Ung-hwan Pi, Kwang-seok Kim, Kee-won Kim, Young-man Jang
  • Publication number: 20140252519
    Abstract: Magnetoresistive structures, magnetic random-access memory devices including the same, and methods of manufacturing the magnetoresistive structure, include a first magnetic layer having a magnetization direction that is fixed, a second magnetic layer corresponding to the first magnetic layer, wherein a magnetization direction of the second magnetic layer is changeable, and a magnetoresistance (MR) enhancing layer and an intermediate layer both between the first magnetic layer and the second magnetic layer.
    Type: Application
    Filed: January 29, 2014
    Publication date: September 11, 2014
    Inventors: Kee-won KIM, Kwang-seok KIM, Sung-chul LEE, Young-man JANG, Ung-hwan PI