Patents by Inventor Yung Hsin TAI

Yung Hsin TAI 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).

  • Substrate wafer and manufacturing method of a III-nitride semiconductor device
    Patent number: 10276747
    Abstract: A substrate wafer composed of a hexagonal single crystal material including a C crystalline plane, an A crystalline plane, and an M-axis direction includes a top surface is a C-axis plane; a first side connecting to the aforementioned top surface and being substantially a curve line viewing from the direction perpendicular to the aforementioned C crystalline plane and including a curvature center; and a second side connecting to the aforementioned first side; and wherein there is a line segment defined by a shortest distance between the aforementioned second side and the aforementioned curvature center, and the aforementioned line segment is not parallel with the aforementioned M-axis direction.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 30, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Kai Shen Chen, Hsin Hsiung Huang, Wan Jung Lee, Pei Chia Chen, Yung Hsin Tai
  • SUBSTRATE WAFER AND MANUFACTURING METHOD OF A III-NITRIDE SEMICONDUCTOR DEVICE
    Publication number: 20170309783
    Abstract: A substrate wafer composed of a hexagonal single crystal material including a C crystalline plane, an A crystalline plane, and an M-axis direction includes a top surface is a C-axis plane; a first side connecting to the aforementioned top surface and being substantially a curve line viewing from the direction perpendicular to the aforementioned C crystalline plane and including a curvature center; and a second side connecting to the aforementioned first side; and wherein there is a line segment defined by a shortest distance between the aforementioned second side and the aforementioned curvature center, and the aforementioned line segment is not parallel with the aforementioned M-axis direction.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 26, 2017
    Inventors: Kai Shen CHEN, Hsin Hsiung HUANG, Wan Jung LEE, Pei Chia CHEN, Yung Hsin TAI