Patents by Inventor Chan Kyung Choi

Chan Kyung 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).

  • Patent number: 10411124
    Abstract: A semiconductor structure includes a substrate, a III-Nitride intermediate stack including the protrusion propagation body situated over the substrate, a transition body over the III-Nitride intermediate stack, a III-Nitride buffer layer situated over the transition body, and a III-Nitride device fabricated over the group III-V buffer layer. The protrusion propagation body includes at least a protrusion generating layer and two or more protrusion spreading multilayers.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: September 10, 2019
    Assignee: Infineon Technologies Americas Corp.
    Inventors: Chan Kyung Choi, Mihir Tungare, Peter Wook Kim
  • Patent number: 10211329
    Abstract: There are disclosed herein various implementations of a charge trapping prevention III-Nitride transistor. Such a transistor may be a III-Nitride high electron mobility transistor (HEMT) including a III-Nitride intermediate body situated over a substrate, a channel layer situated over the III-Nitride intermediate body, and a barrier layer situated over the channel layer. The channel layer and the barrier layer are configured to produce a two-dimensional electron gas (2DEG). In addition, the III-Nitride transistor includes a dielectric layer situated over the barrier layer, a gate coupled to the barrier layer, and a drain electrode and a source electrode each extending through the dielectric layer. The drain electrode makes ohmic contact with one or both of the barrier layer and a charge trapping prevention layer situated between the dielectric layer and the barrier layer.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: February 19, 2019
    Assignee: Infineon Technologies Americas Corp.
    Inventors: Hyeongnam Kim, Mohamed Imam, Alain Charles, Jianwei Wan, Mihir Tungare, Chan Kyung Choi
  • Publication number: 20180175183
    Abstract: A semiconductor structure includes a substrate, a III-Nitride intermediate stack including the protrusion propagation body situated over the substrate, a transition body over the III-Nitride intermediate stack, a III-Nitride buffer layer situated over the transition body, and a III-Nitride device fabricated over the group III-V buffer layer. The protrusion propagation body includes at least a protrusion generating layer and two or more protrusion spreading multilayers.
    Type: Application
    Filed: February 19, 2018
    Publication date: June 21, 2018
    Inventors: Chan Kyung Choi, Mihir Tungare, Peter Wook Kim
  • Patent number: 9954089
    Abstract: There are disclosed herein various implementations of a semiconductor component including a protrusion propagation body. The semiconductor component includes a substrate, a III-Nitride intermediate stack including the protrusion propagation body situated over the substrate, a III-Nitride buffer layer situated over the group III-V intermediate stack, and a III-Nitride device fabricated over the group III-V buffer layer. The protrusion propagation body includes at least a protrusion generating layer and two or more protrusion spreading multilayers.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: April 24, 2018
    Assignee: Infineon Technologies Americas Corp.
    Inventors: Chan Kyung Choi, Mihir Tungare, Peter Wook Kim
  • Publication number: 20170365699
    Abstract: There are disclosed herein various implementations of a semiconductor component including a protrusion propagation body. The semiconductor component includes a substrate, a III-Nitride intermediate stack including the protrusion propagation body situated over the substrate, a III-Nitride buffer layer situated over the group III-V intermediate stack, and a III-Nitride device fabricated over the group III-V buffer layer. The protrusion propagation body includes at least a protrusion generating layer and two or more protrusion spreading multilayers.
    Type: Application
    Filed: June 20, 2016
    Publication date: December 21, 2017
    Inventors: Chan Kyung Choi, Mihir Tungare, Peter Wook Kim
  • Publication number: 20170365701
    Abstract: There are disclosed herein various implementations of a charge trapping prevention III-Nitride transistor. Such a transistor may be a III-Nitride high electron mobility transistor (HEMT) including a III-Nitride intermediate body situated over a substrate, a channel layer situated over the III-Nitride intermediate body, and a barrier layer situated over the channel layer. The channel layer and the barrier layer are configured to produce a two-dimensional electron gas (2DEG). In addition, the III-Nitride transistor includes a dielectric layer situated over the barrier layer, a gate coupled to the barrier layer, and a drain electrode and a source electrode each extending through the dielectric layer. The drain electrode makes ohmic contact with one or both of the barrier layer and a charge trapping prevention layer situated between the dielectric layer and the barrier layer.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 21, 2017
    Inventors: Hyeongnam Kim, Mohamed Imam, Alain Charles, Jianwei Wan, Mihir Tungare, Chan Kyung Choi
  • Patent number: 7566908
    Abstract: Light emitting diodes (LEDs) with various electrode structures which preferably provide increased performance. In some embodiments the LEDs are GaN-based and in some embodiments the LEDs are ZnO-based, with a sapphire substrate or a ZnO substrate. In some embodiments the LEDs are hybrid GaN-based ZnO based LEDs.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: July 28, 2009
    Inventors: Yongsheng Zhao, Jin-Joo Song, Chan Kyung Choi