Patents by Inventor Sang D. Lee

Sang D. Lee 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).

  • Plastic semiconductor package
    Patent number: 6661083
    Abstract: A lead frame for a surface mount semiconductor chip package includes a die attach paddle and leads, the die attach paddle having down bond attachment sites on an upper surface of the paddle near a peripheral margin of the paddle, and having a central die attach region on an upper surface of the paddle, wherein a portion of the upper surface of the paddle is recessed. In some embodiments the recessed portion of the upper surface of the paddle includes the die attach region, and in other embodiments the recessed portion of the upper surface of the paddle includes a groove. Also, a lead frame surface mount chip package including such a lead frame.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: December 9, 2003
    Assignee: ChipPAC, Inc
    Inventors: Sang D. Lee, Flynn Carson, Ki T. Ryu, Koo H. Lee
  • Plastic semiconductor package
    Publication number: 20020163015
    Abstract: A lead frame for a surface mount semiconductor chip package includes a die attach paddle and leads, the die attach paddle having down bond attachment sites on an upper surface of the paddle near a peripheral margin of the paddle, and having a central die attach region on an upper surface of the paddle, wherein a portion of the upper surface of the paddle is recessed. In some embodiments the recessed portion of the upper surface of the paddle includes the die attach region, and in other embodiments the recessed portion of the upper surface of the paddle includes a groove. Also, a lead frame surface mount chip package including such a lead frame.
    Type: Application
    Filed: February 22, 2002
    Publication date: November 7, 2002
    Applicant: ChipPAC, Inc.
    Inventors: Sang D. Lee, Flynn Carson, Ki T. Ryu, Koo H. Lee
  • Hypodermic syringe with a locking needle assembly and syringe combination
    Patent number: 5019045
    Abstract: A needle assembly and syringe combination that are permanently joined through a mechanical locking arrangement of a groove 32, catch space 34 and catch 36 is disclosed. The use of this locking arrangement on a non-reusable syringe renders the needle 20 unusable along wih the syringe after a single use.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: May 28, 1991
    Inventor: Sang D. Lee
  • Disposable safety straight razor
    Patent number: 4622742
    Abstract: A disposable razor comprises a body having a blade end and a handle end. The blade end includes a razor blade edge protruding from one side thereof. The handle end is adapted to be grasped during use of the razor and is separable from the body. Within the handle end is a groove for protectively covering the razor blade edge after the razor has been used and the handle end separated from the body of the razor.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: November 18, 1986
    Inventor: Sang D. Lee