Patents by Inventor Xian E. He

Xian E. He 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).

  • Timing closure in chip design
    Patent number: 8769470
    Abstract: Disclosed are a method and system for improving timing closure in chip design. The method comprises: identifying a critical timing path in a chip design pattern, wherein a timing window of the critical timing path is smaller than a predetermined timing window; determining a variation of each segment of the critical timing path, wherein the variation indicates uncertainty of delay of a device and/or a wire caused by one or more factors; and changing at least one segment of the critical timing path based on the variation of each segment of the critical timing path to enlarge the timing window of the critical timing path. The method and system may enlarge a timing window of a critical timing path by reducing the variation thereof, thereby achieving timing closure in the chip design pattern.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: July 1, 2014
    Assignee: International Business Machines Corporation
    Inventors: Hongwei (Nick) Dai, Chen Du, Xian E He, Jian Niu
  • TIMING CLOSURE IN CHIP DESIGN
    Publication number: 20120137263
    Abstract: Disclosed are a method and system for improving timing closure in chip design. The method comprises: identifying a critical timing path in a chip design pattern, wherein a timing window of the critical timing path is smaller than a predetermined timing window; determining a variation of each segment of the critical timing path, wherein the variation indicates uncertainty of delay of a device and/or a wire caused by one or more factors; and changing at least one segment of the critical timing path based on the variation of each segment of the critical timing path to enlarge the timing window of the critical timing path. The method and system may enlarge a timing window of a critical timing path by reducing the variation thereof, thereby achieving timing closure in the chip design pattern.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 31, 2012
    Applicant: International Business Machines Corporation
    Inventors: Hongwei (Nick) Dai, Chen Du, Xian E. He, Jian Niu