Patents by Inventor Chue Siak Liu

Chue Siak Liu 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: 8093707
    Abstract: Various semiconductor package arrangements and methods that improve the reliability of wire bonding a die to ground or other outside contacts are described. In one aspect, selected ground pads on the die are wire bonded to a bonding region located on the tie bar portion of the lead frame. The tie bar is connected to an exposed die attach pad that is downset from the bonding region of the tie bar. In some embodiments, the bonding region and the leads are at substantially the same elevation above the die and die attach pad. The die, bonding wires, and at least a portion of the lead frame can be encapsulated with a plastic encapsulant material while leaving a contact surface of the die attach pad exposed to facilitate electrically coupling the die attach pad to an external device.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: January 10, 2012
    Assignee: National Semiconductor Corporation
    Inventors: Shaw Wei Lee, Ein Sun Ng, Chue Siak Liu, Lee Han Meng @ Eugene Lee, Yee Kim Lee
  • Publication number: 20110089556
    Abstract: Various semiconductor package arrangements and methods that improve the reliability of wire bonding a die to ground or other outside contacts are described. In one aspect, selected ground pads on the die are wire bonded to a bonding region located on the tie bar portion of the lead frame. The tie bar is connected to an exposed die attach pad that is downset from the bonding region of the tie bar. In some embodiments, the bonding region and the leads are at substantially the same elevation above the die and die attach pad. The die, bonding wires, and at least a portion of the lead frame can be encapsulated with a plastic encapsulant material while leaving a contact surface of the die attach pad exposed to facilitate electrically coupling the die attach pad to an external device.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 21, 2011
    Applicant: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Shaw Wei LEE, Ein Sun NG, Chue Siak LIU, Lee Han Meng Eugene LEE, Yee Kim LEE