Patents by Inventor John Atkinson Fifield

John Atkinson Fifield 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: 7688654
    Abstract: A design structure comprising a differential fuse sensing system, which includes a fuse leg configured for introducing a sense current through an electrically programmable fuse (eFUSE) to be sensed, and a differential sense amplifier having a first input node coupled to the fuse leg and a second node coupled to a reference voltage. The fuse leg further includes a current supply device controlled by a variable reference current generator configured to generate an output signal therefrom such that the voltage on the first input node of the sense amplifier is equal to the voltage on the second input node of the sense amplifier whenever the resistance value of the eFUSE is equal to the resistance value of a programmable variable resistance device included within the variable reference current generator.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: March 30, 2010
    Assignee: International Business Machines Corporation
    Inventors: Darren Lane Anand, John Atkinson Fifield, Michael Richard Ouellette
  • Publication number: 20090256591
    Abstract: Disclosed is a design structure for systems and methods of managing a set of programmable fuses on an integrated circuit.
    Type: Application
    Filed: April 15, 2008
    Publication date: October 15, 2009
    Inventors: John Atkinson Fifield, Michael Richard Ouellette
  • Patent number: 7541834
    Abstract: Disclosed is a design structure for systems and methods of managing a set of programmable fuses on an integrated circuit.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: June 2, 2009
    Assignee: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Michael Richard Ouellette
  • Patent number: 7466582
    Abstract: A design structure comprising a static random access memory (SRAM) (200, 400) comprising a plurality of SRAM cells (204), a plurality of wordlines (WLO-WLN) and a voltage regulator (240, 240?, 300, 516) for driving the wordlines with a wordline voltage signal (VWLP). The wordline voltage signal is determined so as to reduce the likelihood of occurrence of read-disturbances and other memory instabilities. In one embodiment, the wordline voltage signal is determined as a function of the metastability voltage (VMETA) of the SRAM cells and an adjusted most positive down level voltage (VAMPDL) that is a function of a predetermined voltage margin (VM) and a most positive down level voltage (VMPDL) that corresponds to the read-disturb voltage of the SRAM cells.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: December 16, 2008
    Assignee: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Harold Pilo
  • Publication number: 20080001251
    Abstract: A design structure comprising a differential fuse sensing system, which includes a fuse leg configured for introducing a sense current through an electrically programmable fuse (eFUSE) to be sensed, and a differential sense amplifier having a first input node coupled to the fuse leg and a second node coupled to a reference voltage. The fuse leg further includes a current supply device controlled by a variable reference current generator configured to generate an output signal therefrom such that the voltage on the first input node of the sense amplifier is equal to the voltage on the second input node of the sense amplifier whenever the resistance value of the eFUSE is equal to the resistance value of a programmable variable resistance device included within the variable reference current generator.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 3, 2008
    Inventors: Darren Lane Anand, John Atkinson Fifield, Michael Richard Ouellette
  • Patent number: 7276775
    Abstract: Damascene or non-damascene processing when used with a method that includes (a) forming a mask having an opening therethrough on a structure, said opening having sidewalls; (b) implanting an inhibiting species into said structure through the opening so as to form an inhibiting region in said structure; and (c) growing a dielectric layer on the structure in said opening, wherein the inhibiting region partially inhibits growth of the dielectric layer is capable of forming a semiconductor structure, e.g., MOSFET or anti-fuse, including a dual thickness dielectric layer. Alternatively, the dual thickness dielectric can be formed by replacing the inhibiting species mentioned above with a dielectric growth enhancement species which forms an enhancing region in the structure which aids in the growth of the dielectric layer.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: October 2, 2007
    Assignee: International Business Machines Corporation
    Inventors: Claude Louis Bertin, Anthony J. Dally, John Atkinson Fifield, John Jesse Higgins, Jack Allan Mandelman, William Robert Tonti, Nicholas Martin van Heel
  • Patent number: 7227239
    Abstract: A resettable fuse device is fabricated on one surface of a semiconductor substrate (10) and includes: a gate region (20) having first and second ends; a source node (81) formed in proximity to the first end of the gate region; an extension region (52) formed to connect the source node to the first end of the gate region; and a drain node (80) formed in proximity to the second end of the gate region and separated from the gate region by a distance (D) such that upon application of a predetermined bias voltage to the drain node a connection between the drain node and the second end of the gate region is completed by junction depletion. A gate dielectric (30) and a gate electrode (40) are formed over the gate region. Current flows between the source node and the drain node when the predetermined bias is applied to both the drain node and the gate electrode.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: June 5, 2007
    Assignee: International Business Machines Corporation
    Inventors: Wagdi William Abadeer, John Atkinson Fifield, Robert J. Gauthier, Jr., William Robert Tonti
  • Patent number: 7068105
    Abstract: A low-voltage differential amplifier circuit is disclosed. The low-voltage differential amplifier circuit includes a first differential amplifier, a second differential amplifier and a summing circuit. The first differential amplifier receives a pair of differential input signals to generate a first output. The second differential amplifier receives the same pair of differential input signals to generate a second output. The summing circuit sums the first output of the first differential amplifier and the second output of the second differential amplifier to provide a common output.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: June 27, 2006
    Assignee: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Steven Harley Lamphier
  • Patent number: 6975169
    Abstract: A low-voltage differential amplifier circuit is disclosed. The low-voltage differential amplifier circuit includes a first differential amplifier, a second differential amplifier and a summing circuit. The first differential amplifier receives a pair of differential input signals to generate a first output. The second differential amplifier receives the same pair of differential input signals to generate a second output. The summing circuit sums the first output of the first differential amplifier and the second output of the second differential amplifier to provide a common output.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: December 13, 2005
    Assignee: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Steven Harley Lamphier
  • Patent number: 6737907
    Abstract: A digitally programmable DC voltage generator system having a programming circuit for controlling a control circuit of a voltage generator system. The programming circuit receives an input control signal, processes the input control signal, and generates an output control signal to the control circuit of the voltage generator system for controlling the control circuit in accordance with the input control signal. The control circuit includes a limiter circuit and an oscillator circuit. The output control signal controls at least one of the limiter circuit for disabling the oscillator circuit upon reaching a target output voltage, and the oscillator circuit for controlling the pumping speed of the oscillator circuit.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: May 18, 2004
    Assignee: International Business Machines Corporation
    Inventors: Louis L. Hsu, Li-Kong Wang, John Atkinson Fifield, Wayne F. Ellis
  • Publication number: 20030109090
    Abstract: Damascene or non-damascene processing when used with a method that includes (a) forming a mask having an opening therethrough on a structure, said opening having sidewalls; (b) implanting an inhibiting species into said structure through the opening so as to form an inhibiting region in said structure; and (c) growing a dielectric layer on the structure in said opening, wherein the inhibiting region partially inhibits growth of the dielectric layer is capable of forming a semiconductor structure, e.g., MOSFET or anti-fuse, including a dual thickness dielectric layer. Alternatively, the dual thickness dielectric can be formed by replacing the inhibiting species mentioned above with a dielectric growth enhancement species which forms an enhancing region in the structure which aids in the growth of the dielectric layer.
    Type: Application
    Filed: December 26, 2002
    Publication date: June 12, 2003
    Applicant: International Business Machines Corporation
    Inventors: Claude Louis Bertin, Anthony J. Dally, John Atkinson Fifield, John Jesse Higgins, Jack Allan Mandelman, William Robert Tonti, Nicholas Martin van Heel
  • Patent number: 6577156
    Abstract: A method and apparatus for initializing an integrated circuit using compressed data from a remote fusebox allows a reduction in the number of fuses required to repair or customize an integrated circuit and allows fuses to be grouped outside of the macros repaired by the fuses. The remote location of fuses allows flexibility in the placement of macros having redundant repair capability, as well as a preferable grouping of fuses for both programming convenience and circuit layout facilitation. The fuses are arranged in rows and columns and represent control words and run-length compressed data to provide a greater quantity of repair points per fuse. The data can be loaded serially into shift registers and shifted to the macro locations to control the selection of redundant circuits to repair integrated circuits having defects or to customize logic.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: June 10, 2003
    Assignee: International Business Machines Corporation
    Inventors: Darren L. Anand, John Edward Barth, Jr., John Atkinson Fifield, Pamela Sue Gillis, Peter O. Jakobsen, Douglas Wayne Kemerer, David E. Lackey, Steven Frederick Oakland, Michael Richard Ouellette, William Robert Tonti
  • Patent number: 6570806
    Abstract: A universal fuse latch device includes a latch circuit receiving an electrical signal for initializing the latch circuit to a first state; one or more legs connected at the latch node, with a first leg implementing a fuse type element capable of transitioning the latch from the first state to a second state; and a second leg including an anti-fuse type element, wherein the fuse latch is provided with a fuse resistance trip point to ensure adequate reading of one of the fuse and anti-fuse type elements. The universal fuse latch device may be part of a programmable fuse bank including a plurality of information fuse latches for storing redundancy information in a memory system and capable of being simultaneously interrogated. A master fuse control device comprising the universal fuse latch circuit is programmed in accordance with a priority of legs to be interrogated in the information fuse latches.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: May 27, 2003
    Assignee: International Business Machines Corporation
    Inventors: Claude Louis Bertin, John Atkinson Fifield, Nicholas Martin Van Heel, Jason Timothy Varricchione
  • Publication number: 20030052729
    Abstract: A digitally programmable DC voltage generator system having a programming circuit for controlling a control circuit of a voltage generator system. The programming circuit receives an input control signal, processes the input control signal, and generates an output control signal to the control circuit of the voltage generator system for controlling the control circuit in accordance with the input control signal. The control circuit includes a limiter circuit and an oscillator circuit. The output control signal controls at least one of the limiter circuit for disabling the oscillator circuit upon reaching a target output voltage, and the oscillator circuit for controlling the pumping speed of the oscillator circuit.
    Type: Application
    Filed: July 3, 2001
    Publication date: March 20, 2003
    Applicant: International Business Machines Corporation
    Inventors: Louis L. Hsu, Li-Kong Wang, John Atkinson Fifield, Wayne F. Ellis
  • Patent number: 6531410
    Abstract: Damascene or non-damascene processing when used with a method that includes (a) forming a mask having an opening therethrough on a structure, said opening having sidewalls; (b) implanting an inhibiting species into said structure through the opening so as to form an inhibiting region in said structure; and (c) growing a dielectric layer on the structure in said opening, wherein the inhibiting region partially inhibits growth of the dielectric layer is capable of forming a semiconductor structure, e.g., MOSFET or anti-fuse, including a dual thickness dielectric layer. Alternatively, the dual thickness dielectric can be formed by replacing the inhibiting species mentioned above with a dielectric growth enhancement species which forms an enhancing region in the structure which aids in the growth of the dielectric layer.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: March 11, 2003
    Assignee: International Business Machines Corporation
    Inventors: Claude Louis Bertin, Anthony J. Dally, John Atkinson Fifield, John Jesse Higgins, Jack Allan Mandelman, William Robert Tonti, Nicholas Martin van Heel
  • Patent number: 6522154
    Abstract: A method of, and a circuit for, measuring a capacitor gate dielectric thickness. The method includes the step of providing a circuit including a gate dielectric capacitor, and charging the circuit with a known current. A voltage output from said circuit is measured, and this voltage is proportional to the gate dielectric capacitor thickness. The present invention may be effectively employed to obtain a number of important advantages. First, because the supply voltage scales with gate dielectric thickness, chip performance is maximized, even when gate oxide runs thick. Furthermore, oxide reliability is not affected because a constant electric field is guaranteed.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: February 18, 2003
    Assignee: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Mark David Jacunski, Thomas Martin Maffitt, Nicholas Van Heel
  • Patent number: 6455778
    Abstract: Thin-film microflex twisted-wire pair and other connectors are disclosed. Semiconductor packages include microflex technology that electrically connects at least one chip to another level of packaging. Microflex connectors, such as thin-film twisted-wire pair connectors according to the present invention provide superior electrical performance, which includes reduced line inductance, incorporation of integrated passive components, and attachment of discrete passive and active components to the microflex. All of these features enable operation of the chip at increased frequencies.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: September 24, 2002
    Assignee: International Business Machines Corporation
    Inventors: Claude Louis Bertin, Thomas George Ference, Wayne John Howell, John Atkinson Fifield
  • Publication number: 20020130672
    Abstract: A method of, and a circuit for, measuring a capacitor gate dielectric thickness. The method comprises the step of providing a circuit including a gate dielectric capacitor, and charging the circuit with a known current. A voltage output from said circuit is measured, and this voltage is proportional to the gate dielectric capacitor thickness. The present invention may be effectively employed to obtain a number of important advantages. First, because the supply voltage scales with gate dielectric thickness, chip performance is maximized, even when gate oxide runs thick. Furthermore, oxide reliability is not affected because a constant electric field is guaranteed.
    Type: Application
    Filed: March 16, 2001
    Publication date: September 19, 2002
    Applicant: International Business Machines Corporation
    Inventors: John Atkinson Fifield, Mark David Jacunski, Thomas Martin Maffitt, Nicholas Van Heel
  • Patent number: 6444490
    Abstract: Thin-film microflex twisted-wire pair and other connectors are disclosed. Semiconductor packages include microflex technology that electrically connects at least one chip to another level of packaging. Microflex connectors, such as thin-film twisted-wire pair connectors according to the present invention provide superior electrical performance, which includes reduced line inductance, incorporation of integrated passive components, and attachment of discrete passive and active components to the microflex. All of these features enable operation of the chip at increased frequencies.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: September 3, 2002
    Assignee: International Business Machines Corporation
    Inventors: Claude Louis Bertin, Thomas George Ference, Wayne John Howell, John Atkinson Fifield
  • Publication number: 20020119637
    Abstract: Damascene or non-damascene processing when used with a method that includes (a) forming a mask having an opening therethrough on a structure, said opening having sidewalls; (b) implanting an inhibiting species into said structure through the opening so as to form an inhibiting region in said structure; and (c) growing a dielectric layer on the structure in said opening, wherein the inhibiting region partially inhibits growth of the dielectric layer is capable of forming a semiconductor structure, e.g., MOSFET or anti-fuse, including a dual thickness dielectric layer. Alternatively, the dual thickness dielectric can be formed by replacing the inhibiting species mentioned above with a dielectric growth enhancement species which forms an enhancing region in the structure which aids in the growth of the dielectric layer.
    Type: Application
    Filed: February 27, 2001
    Publication date: August 29, 2002
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Claude Louis Bertin, Anthony J. Dally, John Atkinson Fifield, John Jesse Higgins, Jack Allan Mandelman, William Robert Tonti, Nicholas Martin van Heel