Patents by Inventor Yeong-Kong Chang

Yeong-Kong Chang 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: 6310397
    Abstract: Form a butted contact in an SRAM memory device by exposing a contact region on the surface of a doped semiconductor substrate and a conductor stack above a field oxide region on the surface of the substrate. Form an interpolysilicon silicon oxide dielectric layer over the device with an opening framing the contact region and the butt end of the conductor stack near the contact region. Form an undoped upper polysilicon layer on the surface of the SRAM device covering the dielectric layer, the contact region, and the butt end of the conductor stack and then patterned into interconnect and load resistance parts. Form a Vcc mask on the surface of the undoped upper polysilicon layer with a window framing the dielectric layer, the contact region, and the butt end of the conductor stack, leaving an exposed region of the undoped upper polysilicon layer.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: October 30, 2001
    Assignee: Taiwan Semiconductor Manufacturing Company
    Inventors: Yeong-Kong Chang, Hung-Che Liao