Patents by Inventor Guan-Jiun Liu

Guan-Jiun Liu 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).

  • Conveyance arm device
    Patent number: 6302459
    Abstract: A conveyance arm device for conveying wafers. The conveyance arm device comprises a conducting seat, at least a tweezer, and at least a conducting path. The conducting seat controls and drives the conveying operation of the tweezer. The tweezer comprises a first end and a second end, and a first surface and a second surface between the first and the second ends. The first end of the tweezer is connected to the conducting seat. The conducting film is adhered to the second surface of the tweezer.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: October 16, 2001
    Assignee: United Microelectronics Corp.
    Inventors: Chi-Jui Sung, Chen-Chih Tsai, Yung-Hui Feng, Guan-Jiun Liu
  • Method of forming a shallow trench isolation structure
    Patent number: 6238996
    Abstract: This invention provides a concave shallow trench isolation structure, and a fabricating method of a shallow trench isolation structure with concave bottom corners. The concave shape of the structure prevents stress centralization, and avoids leakage current or punch through in the source/drain regions.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: May 29, 2001
    Assignee: United Microelectronics Corp.
    Inventors: Guan-Jiun Liu, Shih-Ching Chen, Chi-Jui Sung, Chung-Po Hsu