Patents by Inventor Keng Guan Quah

Keng Guan Quah 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).

  • Leadframe structure having moveable sub-frame
    Patent number: 5920113
    Abstract: A leadframe (1) includes a main frame having longitudinal outer rails (4) and a number of sub-frame (8) separated from the main frame by a slit (6) extending around at least part of the perimeter of the sub-frame (8). A plurality of flag portions (2), on which a semiconductor die is to be mounted, extend from the mainframe and a plurality of lead portions (12) extend from the sub-frame (8) towards the flag portions (2). The sub-frame (8) is bent twice in a zig-zag fashion so as to be in a plane parallel to that of the main frame so that the corresponding flag and lead portions overlap without affecting the dimensions of the outer edge portion of the main frame.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: July 6, 1999
    Assignee: Motorola, Inc.
    Inventors: Hin Kooi Chee, Chee Hiong Chew, Hou Boon Tan, Robert J. McLaughlin, David M. Culbertson, Alex J. Elliott, Keng Guan Quah