Patents by Inventor So-Zen Yao

So-Zen Yao 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: 9177093
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: November 3, 2015
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20140215426
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 8386984
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: February 26, 2013
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20130031524
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 8365128
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: January 29, 2013
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 8291365
    Abstract: An innovative routing method for an integrated circuit design layout. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: October 16, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 8255857
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: August 28, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 7716621
    Abstract: A method and system of improving signal integrity in integrated circuit designs is disclosed. In some embodiments, signal integrity optimization is conducted in conjunction with detailed routing of an integrated circuit design based upon a global routing plan previously generated for the design.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: May 11, 2010
    Assignee: Cadence Design Systems, Inc.
    Inventors: Ying-Meng Li, Chih-Wei Chang, Louis Chao, So Zen Yao
  • Publication number: 20090113371
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: December 31, 2008
    Publication date: April 30, 2009
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20090113372
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: December 31, 2008
    Publication date: April 30, 2009
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20090106728
    Abstract: Routing methods for an integrated circuit design layout are disclosed. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: December 31, 2008
    Publication date: April 23, 2009
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20060190897
    Abstract: An innovative routing method for an integrated circuit design layout. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: January 6, 2006
    Publication date: August 24, 2006
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 7036101
    Abstract: An innovative routing method for an integrated circuit design layout. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: April 25, 2006
    Assignee: Cadence Design Systems, Inc.
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Publication number: 20020120912
    Abstract: An innovative routing method for an integrated circuit design layout. The layout can include design netlists and library cells. A multiple-level global routing can generate topological wire for each net. An area oriented graph-based detail routing on the design can be performed. A post route optimization after the detail routing can be performed to further improve the routing quality. Some methods can be single threaded all or some of the time, and/or multi-threaded some or all of the time.
    Type: Application
    Filed: February 7, 2002
    Publication date: August 29, 2002
    Inventors: Limin He, So-Zen Yao, Wenyong Deng, Jing Chen, Liang-Jih Chao
  • Patent number: 6327693
    Abstract: An EDA tool is provided with a placement and routing (P&R) module that optimizes placement and routing of an IC design in an interconnect delay driven manner. The P&R module systematically determines if it can improve (i.e. reduce) interconnect delay of the current critical interconnect routing path by determining if it can improve the interconnect delays of its constituting segments, each interconnecting two pins through a component. For each segment, the P&R module determines if the interconnect delay can be achieved by using different interconnect routing path interconnecting the two pins through the component replaced at a different location, and alternatively, through a logically equivalent component disposed at a different location.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: December 4, 2001
    Inventors: Chung-Kuan Cheng, So-Zen Yao