Patents by Inventor Maocheng FAN

Maocheng FAN 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: 11133322
    Abstract: The disclosure provides a dual-port static random access memory cell layout structure, including a pull-down transistor layout structure, a first and a second pass transistor layout structure. Each of them includes an active region pattern and a polysilicon pattern; and contact hole patterns. The active region pattern of the pull-down transistor layout structure and the first pass transistor layout structure are connected together, and share the contact hole pattern at one end. The active region pattern of the pull-down transistor layout structure and the second pass transistor layout structure are connected together, and share the contact hole pattern at the other end. The disclosure optimizes the dual-port static random access memory cell layout structure, improves the influence of the optical fillet effect on device matching, strengthens the performance including read-write crosstalk of the pull-down transistor under the situation of the same area, and increases the read current.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: September 28, 2021
    Assignee: Shanghai Huali Integrated Circuit Corporation
    Inventors: Dongcheng Wu, Maocheng Fan
  • Publication number: 20210202494
    Abstract: The disclosure provides a dual-port static random access memory cell layout structure, including a pull-down transistor layout structure, a first and a second pass transistor layout structure. Each of them includes an active region pattern and a polysilicon pattern; and contact hole patterns. The active region pattern of the pull-down transistor layout structure and the first pass transistor layout structure are connected together, and share the contact hole pattern at one end. The active region pattern of the pull-down transistor layout structure and the second pass transistor layout structure are connected together, and share the contact hole pattern at the other end. The disclosure optimizes the dual-port static random access memory cell layout structure, improves the influence of the optical fillet effect on device matching, strengthens the performance including read-write crosstalk of the pull-down transistor under the situation of the same area, and increases the read current.
    Type: Application
    Filed: July 29, 2020
    Publication date: July 1, 2021
    Inventors: Dongcheng WU, Maocheng FAN