Patents by Inventor Ching Yiu

Ching Yiu 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).

  • Publication number: 20050255673
    Abstract: An apparatus and method is provided for detaching a semiconductor chip from an adhesive tape on which it is mounted. The apparatus comprises a platform adapted to contact the adhesive tape at a position of the chip and a retaining force generator coupled to the platform for drawing the adhesive tape in a direction away from the chip. An elevation device is projectable from the platform that is movable both laterally across a surface of the platform and vertically with respect to the platform for elevating the chip. By moving the elevation device across a width of the chip while lifting the chip, controlled lifting of the chip and propagation of delamination between the chip and the adhesive tape may be achieved.
    Type: Application
    Filed: May 11, 2004
    Publication date: November 17, 2005
    Inventors: Yiu Cheung, Chou Liu, Ching Yiu, Chi Chong
  • Patent number: 4949661
    Abstract: The present invention discloses a device for restricting the movement of a hydraulically actuated rudder assembly on a large ocean-going vessel during failure of the hydraulic system. It comprises a half-collar made of a material that is substantially incompressible along its lengthwise axis and is adapted to fit over a ram rod or a guide rod in a steering assembly between a cross-head and a ram rod sleeve or guide rod. The length of the half-collar is minimally less than the length between the cross-head and the terminus of the ram rod or guide rod when the rudder is in a neutral position.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: August 21, 1990
    Assignee: Chevron Research Company
    Inventors: R. H. Phillips, Ching Yiu