Patents by Inventor Jong-Yoon Ha

Jong-Yoon Ha 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).

  • Methods of fabricating micro- and nanostructure arrays and structures formed therefrom
    Patent number: 9627199
    Abstract: Methods of fabricating micro- and nanostructures comprise top-down etching of lithographically patterned GaN layer to form an array of micro- or nanopillar structures, followed by selective growth of GaN shells over the pillar structures via selective epitaxy. Also provided are methods of forming micro- and nanodisk structures and microstructures formed from thereby.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: April 18, 2017
    Assignees: University of Maryland, College Park, Northrop Grumman Systems Corporation, The United States of America, as represented by the Secretary of Commerce, National Institute of Standards and Technology
    Inventors: Abhishek Motayed, Sergiy Krylyuk, Albert V. Davydov, Matthew King, Jong-Yoon Ha
  • Methods of Fabricating Micro- and Nanostructure Arrays and Structures Formed Therefrom
    Publication number: 20150170901
    Abstract: Methods of fabricating micro- and nanostructures comprise top-down etching of lithographically patterned GaN layer to form an array of micro- or nanopillar structures, followed by selective growth of GaN shells over the pillar structures via selective epitaxy. Also provided are methods of forming micro- and nanodisk structures and microstructures formed from thereby.
    Type: Application
    Filed: December 12, 2014
    Publication date: June 18, 2015
    Applicants: University of Maryland, College Park, Northrop Grumman Systems Corporation, United States of America, as Represented by the Secretary of Commerce
    Inventors: Abhishek Motayed, Sergiy Krylyuk, Albert V. Davydov, Matthew King, Jong-Yoon Ha
  • Low temperature co-firing ceramic (LTCC) composition for microwave frequency
    Patent number: 6841496
    Abstract: The invention relates to a low temperature co-firing ceramic (LTCC) composition for microwave frequency represented by the following formula 1: Ca[(Li1/3Nb2/3)1-xTix]O3-?+y(B2O3.ZnO.SiO2.PbO)??(1) wherein x is molar ratio and 0?x?0.3; and y is wt % ratio and 0?y?15. The present invention relates to dielectric LTCC composition for microwave frequency that has high dielectric constants, high Q values, and stable temperature coefficients of the resonant frequency, and has sintering temperature as low as ?900° C. so as to be co-fired without reaction with an electrode such as silver (Ag). The compositions have excellent characteristics required to cellular phones and PCS in the range of 800 MHz˜1.9 GHz, which is commonly used, and laminated chip filters and antennas in the range of IMT 2000 of 2 GHz, which will be used.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: January 11, 2005
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyun-Jai Kim, Seok-Jin Yoon, Ji-Won Choi, Chong-Yun Kang, Jong-Yoon Ha
  • Microwave dielectric ceramic composition having high quality factor
    Patent number: 6790800
    Abstract: Disclosed is a dielectric ceramic composition represented by (1−x) (Mg1/3Ta2/3)O2-xZrO2(0<x≦0.2) that has high dielectric constants, high quality factor (Q) values, and stable temperature coefficients of the resonant frequency. The composition can easily achieve a high quality factor (Q) value by sintering for a lesser duration and at lower temperatures.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: September 14, 2004
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyun-Jai Kim, Seok-Jin Yoon, Ji-Won Choi, Chong-Yun Kang, Jong-Yoon Ha
  • Microwave dielectric ceramic composition having high quality factor
    Publication number: 20030216244
    Abstract: Disclosed is a dielectric ceramic composition represented by (1−x)(Mg1/3Ta2/3)O2-xZrO2(0≦x≦0.2) that has high dielectric constants, high quality factor (Q) values, and stable temperature coefficients of the resonant frequency. The composition can easily achieve a high quality factor (Q) value by sintering for a lesser duration and at lower temperatures.
    Type: Application
    Filed: December 19, 2002
    Publication date: November 20, 2003
    Inventors: Hyun-Jai Kim, Seok-Jin Yoon, Ji-Won Choi, Chong-Yun Kang, Jong-Yoon Ha
  • Low temperature co-firing ceramic (LTCC) composition for microwave frequency
    Publication number: 20030211931
    Abstract: The invention relates to a low temperature co-firing ceramic (LTCC) composition for microwave frequency represented by the following formula 1:
    Type: Application
    Filed: December 5, 2002
    Publication date: November 13, 2003
    Inventors: Hyun-Jai Kim, Seok-Jin Yoon, Ji-Won Choi, Chong-Yun Kang, Jong-Yoon Ha