Patents by Inventor B. S. Chandra Shekar

B. S. Chandra Shekar 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: 6433564
    Abstract: An apparatus was described which allows accurate and fast positioning of device kits for the input shuttle, the output shuttle, the docking plates, hot plate and testing stations within the semiconductor device manufacturing and testing applications for Ball Grid Array sockets. A method was highlighted by means of which the sockets in these shuttles and plates can be adapted to different sizes and different types of semiconductor devices. A pick up shaft described resulted in added flexibility within the semiconductor device manufacturing and testing environment.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: August 13, 2002
    Assignee: St Assemby Test Services Pte. Ltd
    Inventors: B. S. Chandra Shekar, Liop-Jin Yap, Chee-Keong Tan
  • Patent number: 6184047
    Abstract: An apparatus for effecting a semiconductor device handling method which includes picking up a semiconductor device by vacuum at the tip of a sleeve assembly nozzle having a longitudinal axis situated parallel to a Z axis of an orthogonal XYZ coordinate system and being movable in X and Y directions laterally of the Z axis in order to translate the sleeve assembly nozzle between different pick-up sites and a test site, and placing the semiconductor device onto a test contactor for testing, the improvements include means, operatively associated with the sleeve assembly nozzle, for adjusting the tip relative to a top surface of the semiconductor device and means, operatively associated with the sleeve assembly nozzle, for controlling the semiconductor device contact pressure by the mechanical arrangement of device members of the sleeve assembly nozzle.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: February 6, 2001
    Assignee: ST Assembly Test Services Pte Ltd
    Inventors: B. S. Chandra Shekar, Chee-Keong Tan