Patents by Inventor Wei-Ching GUO

Wei-Ching GUO 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).

  • Acoustic wave device and forming method thereof
    Patent number: 11929730
    Abstract: An acoustic wave element includes: a substrate; a bonding structure on the substrate; a support layer on the bonding structure; a first electrode including a lower surface on the support layer; a cavity positioned between the support layer and the first electrode and exposing a lower surface of the first electrode; a piezoelectric layer on the first electrode; and a second electrode on the piezoelectric layer, wherein at least one of the first electrode and the second electrode includes a first layer and a second layer that the first layer has a first acoustic impedance and a first electrical impedance, the second layer has a second acoustic impedance and a second electrical impedance, wherein the first acoustic impedance is higher than the second acoustic impedance, and the second electrical impedance is lower than the first electrical impedance.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: March 12, 2024
    Assignee: EPISTAR CORPORATION
    Inventors: Ta-Cheng Hsu, Wei-Shou Chen, Chun-Yi Lin, Chung-Jen Chung, Wei-Tsuen Ye, Wei-Ching Guo
  • ACOUSTIC WAVE DEVICE AND MANUFACTURING METHOD THEREOF
    Publication number: 20220393659
    Abstract: An acoustic wave device includes: a substrate; a first electrode on the substrate; a piezoelectric layer on the first electrode; and a second electrode on the piezoelectric layer. A bonding interface is located between the substrate and the first electrode. The full width at half maximum (FWHM) in the X-ray diffraction pattern of the crystal plane <002> of the piezoelectric layer is between 10 arc-sec and 3600 arc-sec.
    Type: Application
    Filed: June 2, 2022
    Publication date: December 8, 2022
    Inventors: TA-CHENG HSU, WEI-SHOU CHEN, CHUNG-JEN CHUNG, CHENG-TSE CHOU, TIEN-YU WANG, CHUN-YI LIN, YU-JIUN SHEN, WEI-CHING GUO
  • ACOUSTIC WAVE DEVICE AND FORMING METHOD THEREOF
    Publication number: 20210257986
    Abstract: An acoustic wave element includes: a substrate; a bonding structure on the substrate; a support layer on the bonding structure; a first electrode including a lower surface on the support layer; a cavity positioned between the support layer and the first electrode and exposing a lower surface of the first electrode; a piezoelectric layer on the first electrode; and a second electrode on the piezoelectric layer, wherein at least one of the first electrode and the second electrode includes a first layer and a second layer that the first layer has a first acoustic impedance and a first electrical impedance, the second layer has a second acoustic impedance and a second electrical impedance, wherein the first acoustic impedance is higher than the second acoustic impedance, and the second electrical impedance is lower than the first electrical impedance.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 19, 2021
    Inventors: Ta-Cheng HSU, Wei-Shou CHEN, Chun-Yi LIN, Chung-Jen CHUNG, Wei-Tsuen YE, Wei-Ching GUO