Patents by Inventor Frank Hawley

Frank Hawley 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: 7459763
    Abstract: A reprogrammable metal-to-metal antifuse is disposed between two metal interconnect layers in an integrated circuit. A lower barrier layer is formed from Ti. A lower adhesion-promoting layer is disposed over the lower Ti barrier layer. An antifuse material layer selected from a group comprising at least one of amorphous carbon and amorphous carbon doped with at least one of hydrogen and fluorine is disposed over the lower adhesion-promoting layer. An upper adhesion-promoting layer is disposed over the antifuse material layer. An upper Ti barrier layer is disposed over the upper adhesion-promoting layer.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 2, 2008
    Assignee: Actel Corporation
    Inventors: A. Farid Issaq, Frank Hawley, John McCollum
  • Publication number: 20080169498
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 17, 2008
    Applicant: ACTEL CORPORATION
    Inventors: Fethi Dhaoui, John McCollum, Frank Hawley, Leslie Wilkinson
  • Patent number: 7393722
    Abstract: A reprogrammable metal-to-metal antifuse is disposed between two metal interconnect layers in an integrated circuit. A lower barrier layer is formed from Ti. A lower adhesion-promoting layer is disposed over the lower Ti barrier layer. An antifuse material layer selected from a group comprising at least one of amorphous carbon and amorphous carbon doped with at least one of hydrogen and fluorine is disposed over the lower adhesion-promoting layer. An upper adhesion-promoting layer is disposed over the antifuse material layer. An upper Ti barrier layer is disposed over the upper adhesion-promoting layer.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: July 1, 2008
    Assignee: Actel Corporation
    Inventors: A. Farid Issaq, Frank Hawley, John McCollum
  • Patent number: 7390726
    Abstract: A metal-to-metal antifuse is disposed between two metal interconnect layers in an integrated circuit. An insulating layer is disposed above a lower metal interconnect layer. The insulating layer includes a via formed therethrough containing a tungsten plug in electrical contact with the lower metal interconnect layer. An antifuse material layer comprising amorphous carbon is disposed above the upper surface of the tungsten plug. The antifuse material layer is disposed between adhesion-promoting layers. A layer of a barrier metal, consisting of either tantalum or tantalum nitride, is disposed over the antifuse layer to form an upper electrode of the antifuse. An oxide or tungsten hard mask provides high etch selectivity and the possibility to etch barrier metals without affecting the dielectric constant value and mechanical properties of the antifuse.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: June 24, 2008
    Assignee: Actel Corporation
    Inventors: A. Farid Issaq, Frank Hawley
  • Patent number: 7368789
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: May 6, 2008
    Assignee: Actel Corporation
    Inventors: Fethi Dhaoui, John McCollum, Frank Hawley, Leslie Richard Wilkinson
  • Publication number: 20070230244
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Application
    Filed: June 13, 2007
    Publication date: October 4, 2007
    Applicant: ACTEL CORPORATION
    Inventors: John McCollum, Hung-Sheng Chen, Frank Hawley
  • Patent number: 7245535
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: July 17, 2007
    Assignee: Actel Corporation
    Inventors: John McCollum, Hung-Sheng Chen, Frank Hawley
  • Publication number: 20070064484
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Application
    Filed: September 21, 2005
    Publication date: March 22, 2007
    Inventors: John McCollum, Hung-Sheng Chen, Frank Hawley
  • Publication number: 20050090047
    Abstract: A method for fabricating a shallow-trench isolation transistor an a semi-conductor substrate includes forming a single isolation trench having a uniform cross section to define an active region in the silicon substrate. The method includes performing sidewall isolation implants on the side and bottom walls of said isolation trench. The method includes depositing a dielectric isolation material in said isolation trench. The method includes planarizing the top surface of said silicon substrate and said dielectric isolation material. The method includes forming a gate oxide layer over said active region in said silicon substrate. The method includes forming and defining gate regions over said oxide layer in said active region in said silicon substrate. The method includes forming source and drain regions in the active region in the silicon substrate.
    Type: Application
    Filed: August 27, 2004
    Publication date: April 28, 2005
    Inventors: Frank Hawley, Daniel Wang
  • Publication number: 20050090073
    Abstract: A shallow-trench isolation includes a semiconductor substrate. Spaced apart source and drain regions define an active region in the semiconductor substrate. A single isolation trench is in the semiconductor substrate having a uniform cross-section surrounds the active region. An isolation implant is formed in the sidewalls of the isolation trench. A gate dielectric layer is formed over the active region. A gate is disposed over the gate dielectric layer and is located between the source and drain region.
    Type: Application
    Filed: August 27, 2004
    Publication date: April 28, 2005
    Inventors: Frank Hawley, Daniel Wang
  • Patent number: 6767769
    Abstract: A method of fabricating a metal-to-metal antifuse, comprising planarizing an insulating layer and a tungsten plug, forming an antifuse material layer over the insulating layer and the tungsten plug, defining the antifuse material layer, forming a barrier metal layer over the antifuse material layer, defining the barrier metal layer, forming an oxide or tungsten layer over the barrier metal layer, forming a layer of photoresist over the oxide or the tungsten layer, defining the oxide or the tungsten layer, removing the photoresist, forming a first masking layer over the barrier metal layer, defining a shape of the antifuse, removing the first masking layer, forming a metal interconnect layer over the insulating layer, forming a second masking layer over the metal interconnect layer, and removing the second masking layer.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: July 27, 2004
    Assignee: Actel Corporation
    Inventors: Frank Hawley, John McCollum, Jeewika Ranaweera
  • Patent number: 6728126
    Abstract: In a first embodiment, programming pulses of about 0.25 mA to about 0.5 mA are applied to an amorphous carbon based antifuse in first and second directions for 10 us to form an antifuse link having a finite resistance of less than 2000 ohms. Soaking pulses of about 2 mA to about 5 mA are then applied to the amorphous carbon antifuse in first and second directions for 1 ms and then repeated up to four more times to form an antifuse link with a finite resistance of about 100 ohms to about 400 ohms. In a second embodiment, programming pulses of about 0.25 mA to about 0.5 mA are applied to an amorphous carbon based antifuse in first and second directions for 1 ms and then repeated four more times to form an antifuse link having a finite resistance of less than 2000 ohms.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: April 27, 2004
    Assignee: Actel Corporation
    Inventors: A. Farid Issaq, Frank Hawley
  • Patent number: 6492206
    Abstract: A metal-to-metal antifuse according to the present invention is disposed between a lower conductive electrode and an upper conductive electrode. The conductive electrodes may comprise either a barrier metal or a tungsten plug, and are each in electrical contact with a metal layer, usually a metal interconnect layer in an integrated circuit. An antifuse material is disposed between the lower and upper conductive electrodes and comprises a layer of amorphous silicon. The antifuse layer is sandwiched between two layers of silicon nitride.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: December 10, 2002
    Assignee: Actel Corporation
    Inventors: Frank Hawley, Farid Issaq
  • Publication number: 20020072154
    Abstract: A metal-to-metal antifuse according to the present invention is disposed between a lower conductive electrode and an upper conductive electrode. The conductive electrodes may comprise either a barrier metal or a tungsten plug, and are each in electrical contact with a metal layer, usually a metal interconnect layer in an integrated circuit. An antifuse material is disposed between the lower and upper conductive electrodes and comprises a layer of amorphous silicon. The antifuse layer is sandwiched between two layers of silicon nitride.
    Type: Application
    Filed: December 12, 2000
    Publication date: June 13, 2002
    Applicant: Actel Corporation
    Inventors: Frank Hawley, Farid Issaq
  • Patent number: 5855196
    Abstract: An apparatus for automatically controlling the activation of the throttle on a carburetor on the engine of a drag race car before the start of the race while staging the car. The apparatus eliminates some of the tasks a driver must perform during the process of staging and launching a race vehicle on the starting line(such as physically depressing the throttle pedal) using a starting line throttle actuation system for Pro tree and Full tree modes for controlling the throttle opening. In both Pro and Full tree modes, the staging process is simplified by allowing the driver to stage with the throttle pedal pre-depressed in the wide open down position, with the actual opening of the throttle controlled by the starting line throttle actuation control system. The apparatus has the driver use the same staging procedure for both Pro tree and Full tree races, thus eliminating separate training that has been required for Pro and Full tree races.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: January 5, 1999
    Assignee: Curtis E. Rodden
    Inventor: Frank Hawley
  • Patent number: 5839419
    Abstract: An adjustable automatic starting line throttle actuation controller for use with a drag racing vehicle. The device controls the throttle from a preset partial throttle opening to a wide open throttle during the initial staging process of the race, while the driver holds the throttle in a wide open position. The device can control the opening of the carburetor linkage of the carburetor to a preset low r.p.m. at the starting line (during the staging process) before a race begins, and control the opening of the throttle for the first portion of the race after the race starts. A preferred version of the device has a dual piston cylinder having respective piston rods connected to the carburetor and one connected to the throttle pedal. An electronic activation assembly controls which piston rod is being actuated.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: November 24, 1998
    Assignee: Curtis E. Rodden
    Inventor: Frank Hawley