Patents by Inventor Wu Yu Hsiao

Wu Yu Hsiao 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).

  • Patent number: 6384911
    Abstract: The present invention proposes an apparatus and a method for detecting the accuracy of drilled holes on a PCB, which can detect the positions, sizes, counts, and wall roughness of drilled holes on a PCB. The apparatus comprises an optical scanning tool and a platform situated below the optical scanning tool. The optical scanning tool can be positioned and moved. Two projecting light sources of parallel light beam are installed thereon to project light to the PCB. A signal receiver is installed between the two projecting light sources. A magnification lens is installed below the signal receiver. The signal receiver receives the light signal of the two projecting light sources reflected from the PCB via the magnification lens. The platform is used to place the PCB. The platform can move with respect to the optical scanning tool to control the distance between the optical scanning tool and the platform.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: May 7, 2002
    Assignee: Machvision, Inc.
    Inventors: Guang Shiah Wang, Chih Yuan Chen, Jacky Chen, Shi Hsuan Hung, Wu Yu Hsiao