Patents by Inventor Li-Fu Chang

Li-Fu 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: 10790272
    Abstract: Aspects of the disclosure are directed to a circuit. In accordance with one aspect, the circuit includes a first layer, wherein the first layer includes two-dimensional (2D) shapes; a second layer coupled adjacent to the first layer through at least one via hole, wherein the second layer includes only one-dimensional (1D) shapes; a shared drain terminal; and a source terminal termination.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: September 29, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Harmeet Sobti, Mehrdad Manesh, Li-Fu Chang
  • Publication number: 20190043850
    Abstract: Aspects of the disclosure are directed to a circuit. In accordance with one aspect, the circuit includes a first layer, wherein the first layer includes two-dimensional (2D) shapes; a second layer coupled adjacent to the first layer through at least one via hole, wherein the second layer includes only one-dimensional (1D) shapes; a shared drain terminal; and a source terminal termination.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 7, 2019
    Inventors: Harmeet SOBTI, Mehrdad MANESH, Li-Fu CHANG
  • Patent number: 8283377
    Abstract: Provided is a method for inhibiting blood vessel stenosis in a subject, comprising administrating to the subject an effective amount of an active ingredient selected from a group consisting of a compound of formula (I), a pharmaceutically acceptable salt of the compound, a pharmaceutically acceptable ester of the compound, and combinations thereof. Also provided is a method for inhibiting blood vessel stenosis in a subject, comprising administration to the subject an effective amount of an Angelicae Sinensis extract comprising the compound of formula (I).
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 9, 2012
    Assignee: China Medical University
    Inventors: Shinn-Zong Lin, Horng-Jyh Harn, Tzyy-Wen Chiou, Li-Fu Chang
  • Publication number: 20120208875
    Abstract: Provided is a method for inhibiting blood vessel stenosis in a subject, comprising administrating to the subject an effective amount of an active ingredient selected from a group consisting of a compound of formula (I), a pharmaceutically acceptable salt of the compound, a pharmaceutically acceptable ester of the compound, and combinations thereof. Also provided is a method for inhibiting blood vessel stenosis in a subject, comprising administration to the subject an effective amount of an Angelicae Sinensis extract comprising the compound of formula (I).
    Type: Application
    Filed: May 20, 2011
    Publication date: August 16, 2012
    Applicant: CHINA MEDICAL UNIVERSITY
    Inventors: Shinn-Zong LIN, Jyh-Harn Horng, Tzyy-Wen Chiou, Li-Fu Chang
  • Patent number: 8225248
    Abstract: DFM systems are provided that incorporate manufacturing variations in the analysis of integrated circuits by calculating predicted manufacturing variations on the shapes of interconnects and devices of the drawn layout of a circuit design. The shape variation on interconnects is converted to variations in resistor-capacitor (RC) parasitics. The shape variation on devices is converted to variations in device parameters. The variation in device parameters and wire parasitics is converted to changes in timing performance, signal integrity, and power consumption by determining the impact of device parameter and wire parasitic variations on the behavior of each instance of a standard cell. The results from these analyses are integrated back into the design flow as incremental delay files (timing), noise failures and buffer insertion/driver resizing commands (noise), and leakage power hotspots and cell substitution commands (power consumption).
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: July 17, 2012
    Assignee: Cadence Design Systems, Inc.
    Inventors: Haizhou Chen, Li-Fu Chang, Richard Rouse, Nishath Verghese
  • Patent number: 7673260
    Abstract: DFM systems are provided that incorporate manufacturing variations in the analysis of integrated circuits by calculating predicted manufacturing variations on the shapes of interconnects and devices of the drawn layout of a circuit design. The shape variation on interconnects is converted to variations in resistor-capacitor (RC) parasitics. The shape variation on devices is converted to variations in device parameters. The variation in device parameters and wire parasitics is converted to changes in timing performance, signal integrity, and power consumption by determining the impact of device parameter and wire parasitic variations on the behavior of each instance of a standard cell. The results from these analyses are integrated back into the design flow as incremental delay files (timing), noise failures and buffer insertion/driver resizing commands (noise), and leakage power hotspots and cell substitution commands (power consumption).
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: March 2, 2010
    Assignee: Cadence Design Systems, Inc.
    Inventors: Haizhou Chen, Li-Fu Chang, Richard Rouse, Nishath Verghese
  • Patent number: 7360191
    Abstract: Systems and methods for timing-driven shape closure in integrated circuit (“IC”) fabrication are provided. These Integrated Design-Manufacturing Processes (“IDMP”) include a delta flow that integrates information of the IC fabrication timing and geometry verification processes into the IC design. The delta flow is an incremental flow that includes delta-geometry timing prediction processes and/or delta-timing shape prediction processes for processing difference information associated with circuit characterization parameters. The delta flow independently re-characterizes an IC design using the difference or delta information corresponding to the circuit characterization parameters. The delta flow provides delta outputs (incremental) that enhance or re-characterize corresponding parameters of the devices and interconnect structures without the need to generate new circuit characterization parameters and without the need to re-process all information of the IC design.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: April 15, 2008
    Assignee: Clear Shape Technologies, Inc.
    Inventors: Li-Fu Chang, Yao-Ting Wang, Fang-Cheng Chang
  • Patent number: 7216320
    Abstract: Systems and methods for timing-driven shape closure in integrated circuit (“IC”) fabrication are provided. These Integrated Design-Manufacturing Processes (“IDMP”) include a delta flow that integrates information of the IC fabrication timing and geometry verification processes into the IC design. The delta flow is an incremental flow that includes delta-geometry timing prediction processes and/or delta-timing shape prediction processes for processing difference information associated with circuit characterization parameters. The delta flow independently re-characterizes an IC design using the difference or delta information corresponding to the circuit characterization parameters. The delta flow provides delta outputs (incremental) that enhance or re-characterize corresponding parameters of the devices and interconnect structures without the need to generate new circuit characterization parameters and without the need to re-process all information of the IC design.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: May 8, 2007
    Assignee: Clear Shape Technologies, Inc.
    Inventors: Li-Fu Chang, Yao-Ting Wang, Fang-Cheng Chang
  • Publication number: 20070099314
    Abstract: DFM systems are provided that incorporate manufacturing variations in the analysis of integrated circuits by calculating predicted manufacturing variations on the shapes of interconnects and devices of the drawn layout of a circuit design. The shape variation on interconnects is converted to variations in resistor-capacitor (RC) parasitics. The shape variation on devices is converted to variations in device parameters. The variation in device parameters and wire parasitics is converted to changes in timing performance, signal integrity, and power consumption by determining the impact of device parameter and wire parasitic variations on the behavior of each instance of a standard cell. The results from these analyses are integrated back into the design flow as incremental delay files (timing), noise failures and buffer insertion/driver resizing commands (noise), and leakage power hotspots and cell substitution commands (power consumption).
    Type: Application
    Filed: October 24, 2006
    Publication date: May 3, 2007
    Inventors: Haizhou Chen, Li-Fu Chang, Richard Rouse, Nishath Verghese
  • Publication number: 20070094623
    Abstract: DFM systems are provided that incorporate manufacturing variations in the analysis of integrated circuits by calculating predicted manufacturing variations on the shapes of interconnects and devices of the drawn layout of a circuit design. The shape variation on interconnects is converted to variations in resistor-capacitor (RC) parasitics. The shape variation on devices is converted to variations in device parameters. The variation in device parameters and wire parasitics is converted to changes in timing performance, signal integrity, and power consumption by determining the impact of device parameter and wire parasitic variations on the behavior of each instance of a standard cell. The results from these analyses are integrated back into the design flow as incremental delay files (timing), noise failures and buffer insertion/driver resizing commands (noise), and leakage power hotspots and cell substitution commands (power consumption).
    Type: Application
    Filed: October 24, 2006
    Publication date: April 26, 2007
    Inventors: Haizhou Chen, Li-Fu Chang, Richard Rouse, Nishath Verghese
  • Publication number: 20050172251
    Abstract: Systems and methods for timing-driven shape closure in integrated circuit (“IC”) fabrication are provided. These Integrated Design-Manufacturing Processes (“IDMP”) include a delta flow that integrates information of the IC fabrication timing and geometry verification processes into the IC design. The delta flow is an incremental flow that includes delta-geometry timing prediction processes and/or delta-timing shape prediction processes for processing difference information associated with circuit characterization parameters. The delta flow independently re-characterizes an IC design using the difference or delta information corresponding to the circuit characterization parameters. The delta flow provides delta outputs (incremental) that enhance or re-characterize corresponding parameters of the devices and interconnect structures without the need to generate new circuit characterization parameters and without the need to re-process all information of the IC design.
    Type: Application
    Filed: November 8, 2004
    Publication date: August 4, 2005
    Inventors: Li-Fu Chang, Yao-Ting Wang, Fang-Cheng Chang
  • Publication number: 20050108666
    Abstract: Systems and methods for timing-driven shape closure in integrated circuit (“IC”) fabrication are provided. These Integrated Design-Manufacturing Processes (“IDMP”) include a delta flow that integrates information of the IC fabrication timing and geometry verification processes into the IC design. The delta flow is an incremental flow that includes delta-geometry timing prediction processes and/or delta-timing shape prediction processes for processing difference information associated with circuit characterization parameters. The delta flow independently re-characterizes an IC design using the difference or delta information corresponding to the circuit characterization parameters. The delta flow provides delta outputs (incremental) that enhance or re-characterize corresponding parameters of the devices and interconnect structures without the need to generate new circuit characterization parameters and without the need to re-process all information of the IC design.
    Type: Application
    Filed: November 8, 2004
    Publication date: May 19, 2005
    Inventors: Li-Fu Chang, Yao-Ting Wang, Fang-Cheng Chang
  • Patent number: 6643831
    Abstract: A novel parasitic extraction system includes an interconnect primitive library that has a parameterized inductance function for at least one conducting layer of the integrated circuit. A parasitic extractor analyzes structures within a selected distance of a selected conductor within the integrated circuit and determines parasitic inductance values for the selected conductor using the parameterized inductance function of the interconnect primitive library. Using this parasitic extraction system, parasitic impedances, including inductance, may be extracted for an integrated circuit layout, thus allowing more accurate modeling and timing analysis of the integrated circuit layout to be obtained.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: November 4, 2003
    Assignee: Sequence Design, Inc.
    Inventors: Keh-Jeng Chang, Li-Fu Chang, Robert G. Mathews, Martin G. Walker
  • Publication number: 20020104063
    Abstract: A novel parasitic extraction system includes an interconnect primitive library that has a parameterized inductance function for at least one conducting layer of the integrated circuit. A parasitic extractor analyzes structures within a selected distance of a selected conductor within the integrated circuit and determines parasitic inductance values for the selected conductor using the parameterized inductance function of the interconnect primitive library. Using this parasitic extraction system, parasitic impedances, including inductance, may be extracted for an integrated circuit layout, thus allowing more accurate modeling and timing analysis of the integrated circuit layout to be obtained.
    Type: Application
    Filed: January 24, 2002
    Publication date: August 1, 2002
    Inventors: Keh-Jeng Chang, Li-Fu Chang, Robert G. Mathews, Martin G. Walker
  • Patent number: 6381730
    Abstract: A novel parasitic extraction system includes an interconnect primitive library that has a parameterized inductance function for at least one conducting layer of the integrated circuit. A parasitic extractor analyzes structures within a selected distance of a selected conductor within the integrated circuit and determines parasitic inductance values for the selected conductor using the parameterized inductance function of the interconnect primitive library. Using this parasitic extraction system, parasitic impedances, including inductance, may be extracted for an integrated circuit layout, thus allowing more accurate modeling and timing analysis of the integrated circuit layout to be obtained.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: April 30, 2002
    Assignee: Sequence Design, Inc.
    Inventors: Keh-Jeng Chang, Li-Fu Chang, Robert G. Mathews, Martin G. Walker
  • Patent number: 6311312
    Abstract: A method models conductive regions of a semiconductor substrate in conjunction with conductors in the interconnect structures above the semiconductor substrate. Such a method allows highly accurate extraction of capacitance in planar (e.g., shallow trench isolation) and non-planar (e.g., thermal oxide isolation) semiconductor structures. This method is particularly applicable to modeling dummy diffusion regions prevalent in shallow trench isolation structures. An area-perimeter approach simplifies calculation of capacitance without using a 3-dimensional electric field solver. A method is also provided for extracting a capacitance associate with a contact, or a connecting conductor between two conductor layers.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: October 30, 2001
    Assignee: Sequence Design, Inc.
    Inventors: Keh-Jeng Chang, Robert G. Mathews, Li-Fu Chang, Xu Yang