Patents by Inventor Yufeng Luo

Yufeng Luo 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).

  • Concurrent optimization of 3D-IC with asymmetrical routing layers
    Patent number: 11276677
    Abstract: Disclosed is an approach to implement multi-die concurrent placement, routing, and/or optimization across multiple dies. This permits the multiple dies to be modeled as a single 3D space. Instead of being limited to a 2D plane, a cell can be placed to the area of any of the dies without splitting the netlist beforehand.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 15, 2022
    Assignee: Cadence Design Systems, Inc.
    Inventors: Liqun Deng, Pinhong Chen, Richard M. Chou, Chin-Chih Chang, Miao Liu, Yufeng Luo
  • Method and apparatus for optimization of digital integrated circuits using detection of bottlenecks
    Patent number: 7191417
    Abstract: A method and apparatus is described which allows efficient optimization of integrated circuit designs. By performing a global analysis of the circuit and identifying bottleneck nodes, optimization focuses on the nodes most likely to generate the highest return on investment and those that have the highest room for improvement. The identification of bottleneck nodes is seamlessly integrated into the timing analysis of the circuit design. Nodes are given a bottleneck number, which represents how important they are in meeting the objective function. By optimizing in order of highest bottleneck number, the optimization process converges quickly and will not get side-tracked by paths that cannot be improved.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: March 13, 2007
    Assignee: Sierra Design Automation, Inc.
    Inventors: Yufeng Luo, Prasanna Venkat Srinivas, Shankar Krishnamoorthy
  • Method and apparatus for electrochemical machining
    Patent number: 7175752
    Abstract: An electrochemical machining apparatus and method for machining a workpiece. The apparatus provides a pulse of electric power, which is conducted from the workpiece, to an electrolyte flowing through a gap, and then to an electrode. Material is eroded from the workpiece when the pulse of electric power is applied, thus machining the workpiece. The apparatus includes a power supply to supply the electric power and a switching portion for producing the pulse by switching the electric power ON and OFF. The switching portion is capable of producing a pulse of electric power with a pulse duration of about 2 microseconds and a current of at least about 2800 amperes.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: February 13, 2007
    Assignee: Federal-Mogul Worldwide, Inc.
    Inventor: Yufeng Luo
  • Method and apparatus for electrochemical machining
    Publication number: 20030217930
    Abstract: An electrochemical machining apparatus and method for machining a workpiece. The apparatus provides a pulse of electric power, which is conducted from the workpiece, to an electrolyte flowing through a gap, and then to an electrode. Material is eroded from the workpiece when the pulse of electric power is applied, thus machining the workpiece. The apparatus includes a power supply to supply the electric power and a switching portion for producing the pulse by switching the electric power ON and OFF. The switching portion is capable of producing a pulse of electric power with a pulse duration of about 2 microseconds and a current of at least about 2800 amperes.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 27, 2003
    Inventor: Yufeng Luo