Patents by Inventor Un-hwan Pi

Un-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).

  • Oscillators and methods of operating the same
    Patent number: 8754717
    Abstract: An oscillator and a method of operating the same are provided, the oscillator may include a free layer, a pinned layer on a first surface of the free layer, and a reference layer on a second surface of the free layer. The free layer may have a variable magnetization direction. The pinned layer may have a pinned magnetization direction. The reference layer may have a magnetization direction non-parallel to the magnetization direction of the pinned layer.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: June 17, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-chul Lee, Sun-ae Seo, Un-hwan Pi, Kee-won Kim, Kwang-seok Kim
  • Oscillators and methods of manufacturing and operating the same
    Publication number: 20120068779
    Abstract: Oscillators and methods of manufacturing and operating the same are provided, the oscillators include a pinned layer, a free layer and a barrier layer having at least one filament between the pinned layer and the free layer. The pinned layer may have a fixed magnetization direction. The free layer corresponding to the pinned layer. The at least one filament in the barrier layer may be formed by applying a voltage between the pinned layer and the free layer. The oscillators may be operated by inducing precession of a magnetic moment of at least one region of the free layer that corresponds to the at least one filament, and detecting a resistance change of the oscillator due to the precession.
    Type: Application
    Filed: February 25, 2011
    Publication date: March 22, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-chul Lee, Sun-ae Seo, Un-hwan Pi, Kee-won Kim, Kwang-seok Kim
  • Oscillators And Methods Of Operating The Same
    Publication number: 20120056685
    Abstract: An oscillator and a method of operating the same are provided, the oscillator may include a free layer, a pinned layer on a first surface of the free layer, and a reference layer on a second surface of the free layer. The free layer may have a variable magnetization direction. The pinned layer may have a pinned magnetization direction. The reference layer may have a magnetization direction non-parallel to the magnetization direction of the pinned layer.
    Type: Application
    Filed: April 28, 2011
    Publication date: March 8, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-chul Lee, Sun-ae Seo, Un-hwan Pi, Kee-won Kim, Kwang-seok Kim