Patents by Inventor Limin He

Limin 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).

  • 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: 7594207
    Abstract: Techniques are described which decrease DRC (design rule check) marking time, e.g., in a circuit interconnect router, by capitalizing on repetitious relationships between interconnect elements (and/or circuit components) in a circuit design, by recording previously calculated markings and reusing the markings on subsequent marking iterations or processes. Marking information corresponding to each marking point includes indications of what types of interconnect elements or circuit components can be positioned at the marking point location without violating a design rule. With a dynamic caching process, once the marking computations have been completed for an element and the corresponding points in the vicinity, those values are stored in a cache. The next time the router encounters another instance of a known element-to-point relationship, the stored values are reloaded and applied to the current point.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: September 22, 2009
    Assignee: Cadence Design Systems, Inc.
    Inventors: Stefanus Mantik, Limin He, Soohong Kim, Jimmy Lam, Jianmin Li
  • 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: 20080066027
    Abstract: Techniques are described which decrease DRC (design rule check) marking time, e.g., in a circuit interconnect router, by capitalizing on repetitious relationships between interconnect elements (and/or circuit components) in a circuit design, by recording previously calculated markings and reusing the markings on subsequent marking iterations or processes. Marking information corresponding to each marking point includes indications of what types of interconnect elements or circuit components can be positioned at the marking point location without violating a design rule. With a dynamic caching process, once the marking computations have been completed for an element and the corresponding points in the vicinity, those values are stored in a cache. The next time the router encounters another instance of a known element-to-point relationship, the stored values are reloaded and applied to the current point.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 13, 2008
    Inventors: Stefanus Mantik, Limin He, Soohong Kim, Jimmy Lam, Jianmin Li
  • Patent number: 7238420
    Abstract: A method for preparing an ?-Al2O3 nanotemplate of fully crystalline ?-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: July 3, 2007
    Assignee: Trustees of Stevens Institute of Technology
    Inventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
  • Publication number: 20070065657
    Abstract: A method for preparing an ?-Al2O3 nanotemplate of fully crystalline ?-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.
    Type: Application
    Filed: June 17, 2004
    Publication date: March 22, 2007
    Inventors: Woo Lee, Yi-Feng Su, Limin He, Justin Meyer
  • 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
  • Patent number: 6808760
    Abstract: A method for preparing an &agr;-Al2O3 nanotemplate of fully crystalline &agr;-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: October 26, 2004
    Assignee: Trustees of Stevens Institute of Technology
    Inventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
  • Patent number: 6645488
    Abstract: Microencapsulated medicine of ox adrenal medulla pheochromocyte (BBC) for treating pain is prepared through the following steps: 1. suspending BBC in solution of sodium alginate; 2. dispersing the suspension in solution of calcium chloride to form calcium alginate bead deposit; 3. mixing the deposit with solution of polylysine to form a coating and depositing; 4. mixing the deposit with sodium alginate to form a coating; 5. displacing the calcium ions in deposit with sodium citrate for microencapsulating BBC; 6. transferring the microencapsulated BBC into culture liquid for storage. The medicine can release analgesic substance for several months after it be implanted into human body.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: November 11, 2003
    Inventors: Yilong Xue, Limin He, Zhengfu Wang, Li Zhang, Xinjian Li
  • Publication number: 20030054101
    Abstract: A method for preparing an &agr;-Al2O3 nanotemplate of fully crystalline &agr;-Al2O3 directly on the surface of a metal alloy is provided. Also provided is a related apparatus.
    Type: Application
    Filed: May 17, 2002
    Publication date: March 20, 2003
    Inventors: Woo Y. Lee, Yi-Feng Su, Limin He, Justin Daniel Meyer
  • Publication number: 20020119125
    Abstract: Microencapsulated medicine of ox adrenal medulla pheochromocyte (BBC) for treating pain is prepared through the following steps: 1. suspending BBC in solution of sodium alginate; 2. dispersing the suspension in solution of calcium chloride to form calcium alginate bead deposit; 3. mixing the deposit with solution of polylysine to form a coating and depositing; 4. mixing the deposit with sodium alginate to form a coating; 5. displacing the calcium ions in deposit with sodium citrate for microencapsulating BBC; 6. transferring the microencapsulated BBC into culture liquid for storage. The medicine can release analgesic substance for several months after it be implanted into human body.
    Type: Application
    Filed: December 14, 2001
    Publication date: August 29, 2002
    Inventors: Yilong Xue, Limin He, Zhengfu Wang, Li Zhang, Xinjian Li
  • 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: 6263478
    Abstract: An integrated circuit design is divided into partitions which each contain two stages of information. The first stage corresponds to sources within the design, and the second stage corresponds to targets within the design. In one implementation, all of the sources in each partition are triggered by a common clock edge. In another implementation, all targets of each partition are triggered by a common clock edge. Specifying timing constraints in partitions can provide an efficient method of determining how much slack, if any, is present in the timing of a design.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: July 17, 2001
    Assignee: Cadence Design Systems, Inc.
    Inventors: Mark S. Hahn, Jimmy Lam, Limin He, Chris Morrison