Patents by Inventor Kevin K.C. Chang

Kevin K.C. Chang 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).

  • Micro-light emitting diode with metal side mirror
    Patent number: 10297722
    Abstract: Light emitting diodes and display systems are disclosed. In an embodiment a light emitting diode (150) includes a p-n diode (120) including a mesa structure (129) that protrudes from a base structure (131). A reflective metallization (130) laterally surrounds the mesa structure, which also includes a quantum well layer of the p-n diode.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 21, 2019
    Assignee: Apple Inc.
    Inventors: Kevin K. C. Chang, Hsin-Hua Hu, Chien-Hsing Huang
  • MICRO-LIGHT EMITTING DIODE WITH METAL SIDE MIRROR
    Publication number: 20170373228
    Abstract: Light emitting diodes and display systems are disclosed. In an embodiment a light emitting diode (150) includes a p-n diode (120) including a mesa structure (129) that protrudes from a base structure (131). A reflective metallization (130) laterally surrounds the mesa structure, which also includes a quantum well layer of the p-n diode.
    Type: Application
    Filed: September 30, 2015
    Publication date: December 28, 2017
    Inventors: Kevin K.C. CHANG, Hsin-Hua HU, Chein-Hsing HUANG
  • Micro device with stabilization post
    Patent number: 9620695
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: April 11, 2017
    Assignee: Apple Inc.
    Inventors: Hsin-Hua Hu, Kevin K. C. Chang, Andreas Bibl
  • MICRO DEVICE WITH STABILIZATION POST
    Publication number: 20160308103
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Application
    Filed: June 24, 2016
    Publication date: October 20, 2016
    Inventors: Hsin-Hua Hu, Kevin K.C. Chang, Andreas Bibl
  • Micro device with stabilization post
    Patent number: 9379092
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: June 28, 2016
    Assignee: Apple Inc.
    Inventors: Hsin-Hua Hu, Kevin K. C. Chang, Andreas Bibl
  • MICRO LED WITH DIELECTRIC SIDE MIRROR
    Publication number: 20160181476
    Abstract: LEDs and an electronic device are disclosed. In an embodiment an LED includes a p-n diode and a dielectric mirror spanning along a lateral sidewall of the p-n diode and directly underneath the p-n diode. An opening is formed in the dielectric mirror directly underneath the p-n diode, and a bottom conductive contact is on the dielectric mirror directly underneath the p-n diode and within the opening in the dielectric mirror.
    Type: Application
    Filed: July 20, 2015
    Publication date: June 23, 2016
    Inventors: Kevin K. C. Chang, Hsin-Hua Hu, Clayton Ka Tsun Chan, Chien-Hsing Huang
  • MICRO DEVICE WITH STABILIZATION POST
    Publication number: 20160071827
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Application
    Filed: November 3, 2015
    Publication date: March 10, 2016
    Inventors: Hsin-Hua Hu, Kevin K.C. Chang, Andreas Bibl
  • Micro device with stabilization post
    Patent number: 9209348
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: December 8, 2015
    Assignee: LuxVue Technology Corporation
    Inventors: Hsin-Hua Hu, Kevin K. C. Chang, Andreas Bibl
  • MICRO DEVICE WITH STABILIZATION POST
    Publication number: 20150214420
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Application
    Filed: April 8, 2015
    Publication date: July 30, 2015
    Inventors: Hsin-Hua Hu, Kevin K.C. Chang, Andreas Bibl
  • Micro device with stabilization post
    Patent number: 9035279
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: May 19, 2015
    Assignee: LuxVue Technology Corporation
    Inventors: Hsin-Hua Hu, Kevin K. C. Chang, Andreas Bibl
  • MICRO DEVICE WITH STABILIZATION POST
    Publication number: 20150008389
    Abstract: A method and structure for stabilizing an array of micro devices is disclosed. A stabilization layer includes an array of stabilization cavities and array of stabilization posts. Each stabilization cavity includes sidewalls surrounding a stabilization post. The array of micro devices is on the array of stabilization posts. Each micro device in the array of micro devices includes a bottom surface that is wider than a corresponding stabilization post directly underneath the bottom surface.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 8, 2015
    Inventors: Hsin-Hua Hu, Kevin K.C. Chang, Andreas Bibl