Patents by Inventor HUI-YI CHANG

HUI-YI 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).

  • MAGNETORESISTIVE RANDOM ACCESS MEMORY
    Publication number: 20240099154
    Abstract: A magnetoresistive random access memory (MRAM) device includes a first array region and a second array region on a substrate, a first magnetic tunneling junction (MTJ) on the first array region, a first top electrode on the first MTJ, a second MTJ on the second array region, and a second top electrode on the second MTJ. Preferably, the first top electrode and the second top electrode include different nitrogen to titanium (N/Ti) ratios.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 21, 2024
    Applicant: UNITED MICROELECTRONICS CORP
    Inventors: Hui-Lin Wang, Si-Han Tsai, Dong-Ming Wu, Chen-Yi Weng, Ching-Hua Hsu, Ju-Chun Fan, Yi-Yu Lin, Che-Wei Chang, Po-Kai Hsu, Jing-Yin Jhang
  • Magnetoresistive random access memory structure
    Patent number: 11917923
    Abstract: A magnetoresistive random access memory (MRAM) structure, including a substrate and multiple MRAM cells on the substrate, wherein the MRAM cells are arranged in a memory region adjacent to a logic region. An ultra low-k (ULK) layer covers the MRAM cells, wherein the surface portion of ultra low-k layer is doped with fluorine, and dents are formed on the surface of ultra low-k layer at the boundaries between the memory region and the logic region.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: February 27, 2024
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Hui-Lin Wang, Ching-Hua Hsu, Si-Han Tsai, Shun-Yu Huang, Chen-Yi Weng, Ju-Chun Fan, Che-Wei Chang, Yi-Yu Lin, Po-Kai Hsu, Jing-Yin Jhang, Ya-Jyuan Hung
  • METHOD FOR PREPARING HYDROPHOBIC FIBERS BY ELECTROSPINNING OF POLYMER
    Publication number: 20200115823
    Abstract: A method for preparing hydrophobic fibers by electrospinning of polymer is provided, which may include the following steps: providing a polymer material including poly(methyl methacrylate); providing a solvent including 2-propanol and water; adding the polymer material into the solvent to form a mixed solution; heating and stirring the mixed solution; electrospinning the mixed solution to generate polymer fibers.
    Type: Application
    Filed: August 5, 2019
    Publication date: April 16, 2020
    Inventors: CHAO-CHING CHANG, HUI-YI CHANG, LIAO-PING CHENG