Patents by Inventor Yang Hee Song

Yang Hee Song 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: 20220285247
    Abstract: Disclosed is a high voltage semiconductor device. More particularly, the present disclosure relates to a semiconductor device capable of improving the breakdown voltage characteristics in an off-state and in an on-state by electrically connecting a first source metal to a source in a core region and in corner regions.
    Type: Application
    Filed: January 11, 2022
    Publication date: September 8, 2022
    Inventor: Yang Hee SONG
  • Publication number: 20190221666
    Abstract: A semiconductor device and a method of manufacturing the same are disclosed. The semiconductor device includes a drift region disposed in a surface portion of a substrate, a body region disposed on one side of the drift region, a gate structure disposed on a portion of the drift region and a portion of the body region, a source region disposed in a surface portion of the body region to be adjacent to the gate structure, a drain region disposed in a surface portion of the drift region to be spaced apart from the gate structure, an insulating layer pattern disposed on a portion of the gate structure and a second surface portion of the drift region between the gate structure and the drain region, and a floating electrode disposed on the insulating layer pattern to reduce an electric field in the drift region.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 18, 2019
    Inventors: Ki Wan Bang, Yang Hee Song
  • Patent number: 9196796
    Abstract: Embodiments of the invention provide a semiconductor light emitting diode having an ohmic electrode structure, and a method of manufacturing the same. The semiconductor light emitting diode includes a light emitting structure having an upper surface constituting an N-face; and an ohmic electrode structure located on the light emitting structure. Here, the ohmic electrode structure includes a lower diffusion preventing layer, a contact layer, an upper diffusion preventing layer, and an Al protective layer from the N-face of the light emitting structure.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: November 24, 2015
    Assignees: Seoul Viosys Co., Ltd., Postech Academy-Industry Foundation
    Inventors: Jong Lam Lee, Yang Hee Song
  • Patent number: 8957449
    Abstract: A method of manufacturing a light emitting diode, includes a process of forming an n-type nitride semiconductor layer, a light emitting layer, and a p-type nitride semiconductor layer on a temporary substrate, a process of forming a p-type electrode on the p-type nitride semiconductor layer, a process of forming a conductive substrate on the p-type electrode, a process of removing the temporary substrate to expose the n-type nitride semiconductor layer, a process of forming a nanoimprint resist layer on the n-type nitride semiconductor layer, a process of pressing the nanoimprint mold on the nanoimprint resist layer to transfer the nano-pattern onto the nanoimprint resist layer, and a process of separating the nanoimprint mold from the nanoimprint resist layer having the nano-pattern and etching a portion of the nanoimprint resist layer having the nano-pattern to form an n-type electrode.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: February 17, 2015
    Assignee: Postech Academy-Industry Foundation
    Inventors: Jong Lam Lee, Jun Ho Son, Yang Hee Song
  • Patent number: 8951820
    Abstract: A method of manufacturing a light emitting diode, includes a process of forming an n-type nitride semiconductor layer, a light emitting layer, and a p-type nitride semiconductor layer on a temporary substrate, a process of forming a p-type electrode on the p-type nitride semiconductor layer, a process of forming a conductive substrate on the p-type electrode, a process of removing the temporary substrate to expose the n-type nitride semiconductor layer, a process of forming a nanoimprint resist layer on the n-type nitride semiconductor layer, a process of pressing the nanoimprint mold on the nanoimprint resist layer to transfer the nano-pattern onto the nanoimprint resist layer, and a process of separating the nanoimprint mold from the nanoimprint resist layer having the nano-pattern and etching a portion of the nanoimprint resist layer having the nano-pattern to form an n-type electrode.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: February 10, 2015
    Assignee: Postech Academy-Industry Foundation
    Inventors: Jong Lam Lee, Jun Ho Son, Yang Hee Song
  • Publication number: 20140353709
    Abstract: Embodiments of the invention provide a gallium nitride-based light emitting diode including a transparent electrode, which includes a metal layer and a metal oxide layer. The light emitting diode includes a substrate, an n-type gallium nitride-based semiconductor layer disposed on the substrate, a p-type gallium nitride-based semiconductor layer disposed on the n-type gallium nitride-based semiconductor layer, an active layer interposed between the n-type gallium nitride-based semiconductor layer and the p-type gallium nitride-based semiconductor layer, and a transparent electrode disposed on the p-type gallium nitride-based semiconductor layer. Here, the transparent electrode has a multilayer structure including a first metal layer and a metal oxide layer sequentially stacked one above another, and impedance of the metal oxide layer matches impedance of an external environment at an interface between the metal oxide layer and the external environment.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicants: POSCO LED Co., Ltd., POSTECH Academy-Industry Foundation
    Inventors: Jong Lam LEE, Sung Jun Kim, Yang Hee Song
  • Patent number: 8552455
    Abstract: Provided is a semiconductor light-emitting diode including a semiconductor layer having a light-emitting structure; and an ohmic electrode incorporating a nanodot layer, a contact layer, a diffusion-preventing layer and a capping layer on the semiconductor layer. The nanodot layer is formed on the N-polar surface of the semiconductor layer and is formed from a substance comprising at least one of Ag, Al and Au. Also provided is a production method therefor. In the ohmic electrode which has the multi-layer structure comprising the nanodot layer/contact layer/diffusion-preventing layer/capping layer in the semiconductor light-emitting diode of this type, the nanodot layer constitutes the N-polar surface of a nitride semiconductor and improves the charge-injection characteristics such that outstanding ohmic characteristics can be obtained.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: October 8, 2013
    Assignees: Seoul Opto Device Co., Ltd., Postech Academy-Industry Foundation
    Inventors: Jong Lam Lee, Yang Hee Song, Jun Ho Son, Buem Joon Kim
  • Publication number: 20130221324
    Abstract: Embodiments of the invention provide a semiconductor light emitting diode having an ohmic electrode structure, and a method of manufacturing the same. The semiconductor light emitting diode includes a light emitting structure having an upper surface constituting an N-face; and an ohmic electrode structure located on the light emitting structure. Here, the ohmic electrode structure includes a lower diffusion preventing layer, a contact layer, an upper diffusion preventing layer, and an Al protective layer from the N-face of the light emitting structure.
    Type: Application
    Filed: August 9, 2011
    Publication date: August 29, 2013
    Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, SEOUL OPTO DEVICE CO., LTD.
    Inventors: Jong Lam Lee, Yang Hee Song
  • Publication number: 20130126929
    Abstract: A method of manufacturing a light emitting diode, includes a process of forming an n-type nitride semiconductor layer, a light emitting layer, and a p-type nitride semiconductor layer on a temporary substrate, a process of forming a p-type electrode on the p-type nitride semiconductor layer, a process of forming a conductive substrate on the p-type electrode, a process of removing the temporary substrate to expose the n-type nitride semiconductor layer, a process of forming a nanoimprint resist layer on the n-type nitride semiconductor layer, a process of pressing the nanoimprint mold on the nanoimprint resist layer to transfer the nano-pattern onto the nanoimprint resist layer, and a process of separating the nanoimprint mold from the nanoimprint resist layer having the nano-pattern and etching a portion of the nanoimprint resist layer having the nano-pattern to form an n-type electrode.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 23, 2013
    Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Jong Lam Lee, Jun Ho Son, Yang Hee Song
  • Publication number: 20120168803
    Abstract: Provided is a semiconductor light-emitting diode including a semiconductor layer having a light-emitting structure; and an ohmic electrode incorporating a nanodot layer, a contact layer, a diffusion-preventing layer and a capping layer on the semiconductor layer. The nanodot layer is formed on the N-polar surface of the semiconductor layer and is formed from a substance comprising at least one of Ag, Al and Au. Also provided is a production method therefor. In the ohmic electrode which has the multi-layer structure comprising the nanodot layer/contact layer/diffusion-preventing layer/capping layer in the semiconductor light-emitting diode of this type, the nanodot layer constitutes the N-polar surface of a nitride semiconductor and improves the charge-injection characteristics such that outstanding ohmic characteristics can be obtained.
    Type: Application
    Filed: September 7, 2010
    Publication date: July 5, 2012
    Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, SEOUL OPTO DEVICE CO., LTD.
    Inventors: Jong Lam Lee, Yang Hee Song, Jun Ho Son, Buem Joon Kim