Patents by Inventor Thomas Charles Brennan

Thomas Charles Brennan 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: 8352902
    Abstract: A method, system and computer program product are provided for implementing routing first for rapid prototyping and improved wiring of heterogeneous hierarchical integrated circuit chips. Placement for each of a plurality of random logic macros (RLMs) is identified. Predefined wiring shapes are created for each of the identified RLMs. Full chip wire routing is defined responsive to the created predefined wiring shapes for each of the identified RLMs.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: January 8, 2013
    Assignee: International Business Machines Corporation
    Inventors: Thomas Charles Brennan, Robert Francis Lembach
  • Publication number: 20120089955
    Abstract: A method, system and computer program product are provided for implementing routing first for rapid prototyping and improved wiring of heterogeneous hierarchical integrated circuit chips. Placement for each of a plurality of random logic macros (RLMs) is identified. Predefined wiring shapes are created for each of the identified RLMs. Full chip wire routing is defined responsive to the created predefined wiring shapes for each of the identified RLMs.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 12, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Thomas Charles Brennan, Robert Francis Lembach
  • Patent number: 7506276
    Abstract: A method of modifying an integrated circuit design. A noise threshold is determined. A threshold, noisy wire length for a particular integrated circuit design is selected. An integrated circuit design is examined for problem networks or wires and all branches that cumulatively equal or exceed the designated threshold noisy wire length. Once the problem networks are identified, the driver circuits driving the problem networks are temporarily replaced with driver circuits with lesser driving capacity. The integrated circuit design is then tested and any new timing failures are identified. Networks that include new timing failures are isolated with symmetric and/or asymmetric wire configurations. This method of modifying an integrated circuit design is non-intrusive to existing neighboring wires, and thus the timing in existing wires is preserved.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: March 17, 2009
    Assignee: International Business Machines Corporation
    Inventors: Thomas Charles Brennan, Todd Alan Greenfield
  • Patent number: 6715133
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: March 30, 2004
    Assignee: International Business Machines Corporation
    Inventor: Thomas Charles Brennan
  • Patent number: 6711721
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: March 23, 2004
    Assignee: International Business Machines Corporation
    Inventor: Thomas Charles Brennan
  • Publication number: 20030106027
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Application
    Filed: January 16, 2003
    Publication date: June 5, 2003
    Inventor: Thomas Charles Brennan
  • Publication number: 20030106028
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Application
    Filed: January 16, 2003
    Publication date: June 5, 2003
    Inventor: Thomas Charles Brennan
  • Patent number: 6556658
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: April 29, 2003
    Assignee: International Business Machines Corporation
    Inventor: Thomas Charles Brennan
  • Publication number: 20030054575
    Abstract: A method is shown which replaces single vias with redundant vias on candidate signals on a semiconductor integrated circuit chip. Where limited space prevents such replacement on more than one signal wire, the method assigns priority to the via through which more current must flow to charge or discharge capacitance. This prioritization reduces the magnitude of delay anomalies arising from vias containing process related resistance defects.
    Type: Application
    Filed: September 17, 2001
    Publication date: March 20, 2003
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Thomas Charles Brennan
  • Patent number: 6434731
    Abstract: An automated method for designing a signal distribution network in an integrated circuit confines the circuits relating to a particular signal, such as a clock signal, to multiple areas equally distributed over the integrated circuit. Each of the multiple areas have tightly-coupled logic connected to a root driver circuit in which the root driver circuit is connected to the signal input. Within the areas of tightly-coupled logic, user-defined placement circuits or groups such as a programmable clock delay having gates, delays, and splitters are connected to the root driver circuit in accordance with wire capacitance targets and input pin load balancing among all the multiple areas. The input pin load balancing and the wire capacitance targets of the user-defined placement groups connected to the root driver circuit in one of the multiple areas matches the input pin load balancing and the wire capacitance targets of other groups connected to other root driver circuits in other multiple areas.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: August 13, 2002
    Assignee: International Business Machines Corporation
    Inventors: Thomas Charles Brennan, Kevin Charles Gower, Daniel John Kolor, Erik Victor Kusko