Patents by Inventor Peng Yeen Chan

Peng Yeen Chan 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: 7181835
    Abstract: A method is provided for processing a lead frame. Generally, a first surface of a lead frame base tape is placed on a first surface of the lead frame. A second surface of the lead frame base tape is placed on a first surface of a porous block. A vacuum is placed on a second surface of the porous block. A device for processing lead frames comprises a porous block with a first side and a second side, and a vacuum system connected to the first side of the porous block. The device may also include devices for attaching chips to the lead frame and wire bonding the chips to the lead frame.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: February 27, 2007
    Assignee: National Semiconductor Corporation
    Inventors: Ah Lek Hu, Sharon Mei Wan Ko, Peng Yeen Chan, Jaime Bayan
  • Publication number: 20040143962
    Abstract: A method is provided for processing a lead frame. Generally, a first surface of a lead frame base tape is placed on a first surface of the lead frame. A second surface of the lead frame base tape is placed on a first surface of a porous block. A vacuum is placed on a second surface of the porous block. A device for processing lead frames comprises a porous block with a first side and a second side, and a vacuum system connected to the first side of the porous block. The device may also include devices for attaching chips to the lead frame and wire bonding the chips to the lead frame.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Applicant: National Semiconductor Corporation
    Inventors: Ah Lek Hu, Sharon Mei Wan Ko, Peng Yeen Chan, Jaime Bayan
  • Patent number: 6698088
    Abstract: A method is provided for processing a lead frame. Generally, a first surface of a lead frame base tape is placed on a first surface of the lead frame. A second surface of the lead frame base tape is placed on a first surface of a porous block. A vacuum is placed on a second surface of the porous block. A device for processing lead frames comprises a porous block with a first side and a second side, and a vacuum system connected to the first side of the porous block. The device may also include devices for attaching chips to the lead frame and wire bonding the chips to the lead frame.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: March 2, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Ah Lek Hu, Sharon Mei Wan Ko, Peng Yeen Chan, Jaime Bayan
  • Patent number: 6467278
    Abstract: A cooling system to reduce damage resulting from panel singulation is provided. A panel may be formed by encapsulating a lead frame with mounted dice. The encapsulating material may be a composite, plastic, or ceramic. Singulation may be a cutting done by laser, water jet, or saw. A chiller system cools a fluid, such as water, to a temperature below 16° C. The cooled fluid is dispensed to a part of the panel being singulated. For example, if a circular saw is used to cut the panel, a plurality of nozzles may be used to direct the fluid to the part of the saw cutting the panel, which defines the part of the panel being singulated. The cooled fluid, cools the panel preventing burring, smearing, and melting of metal contacts.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: October 22, 2002
    Assignee: National Semiconductor Corporation
    Inventors: Ah Lek Hu, Sharon Mei Wan Ko, Peng Yeen Chan
  • Publication number: 20020100163
    Abstract: A method is provided for processing a lead frame. Generally, a first surface of a lead frame base tape is placed on a first surface of the lead frame. A second surface of the lead frame base tape is placed on a first surface of a porous block. A vacuum is placed on a second surface of the porous block. A device for processing lead frames comprises a porous block with a first side and a second side, and a vacuum system connected to the first side of the porous block. The device may also include devices for attaching chips to the lead frame and wire bonding the chips to the lead frame.
    Type: Application
    Filed: February 1, 2001
    Publication date: August 1, 2002
    Applicant: National Semiconductor Corporation
    Inventors: Ah Lek Hu, Sharon Mei Wan Ko, Peng Yeen Chan, Jaime Bayan