Patents by Inventor STEPHEN DENIS HEFFERNAN

STEPHEN DENIS HEFFERNAN 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).

  • Publication number: 20230375600
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, an electrical overstress monitor and/or protection device includes a two different conductive structures configured to electrically arc in response to an EOS event and a sensing circuit configured to detect a change in a physical property of the two conductive structures caused by the EOS event.
    Type: Application
    Filed: May 15, 2023
    Publication date: November 23, 2023
    Inventors: David J. Clarke, Stephen Denis Heffernan, Nijun Wei, Alan J. O'Donnell, Patrick Martin McGuinness, Shaun Bradley, Edward John Coyne, David Aherne, David M. Boland
  • Patent number: 11668734
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, an electrical overstress monitor and/or protection device includes a two different conductive structures configured to electrically arc in response to an EOS event and a sensing circuit configured to detect a change in a physical property of the two conductive structures caused by the EOS event. The two conductive structures have facing surfaces that have different shapes.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: June 6, 2023
    Assignee: Analog Devices International Unlimited Company
    Inventors: David J. Clarke, Stephen Denis Heffernan, Nijun Wei, Alan J. O'Donnell, Patrick Martin McGuinness, Shaun Bradley, Edward John Coyne, David Aherne, David M. Boland
  • Patent number: 11372030
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, a device configured to monitor electrical overstress (EOS) events includes a pair of spaced conductive structures configured to electrically arc in response to an EOS event, wherein the spaced conductive structures are formed of a material and have a shape such that arcing causes a detectable change in shape of the spaced conductive structures, and wherein the device is configured such that the change in shape of the spaced conductive structures is detectable to serve as an EOS monitor.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: June 28, 2022
    Assignee: Analog Devices International Unlimited Company
    Inventors: David J. Clarke, Stephen Denis Heffernan, Alan J. O'Donnell, Patrick M. McGuinness
  • Publication number: 20210396788
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, an electrical overstress monitor and/or protection device includes a two different conductive structures configured to electrically arc in response to an EOS event and a sensing circuit configured to detect a change in a physical property of the two conductive structures caused by the EOS event.
    Type: Application
    Filed: September 3, 2021
    Publication date: December 23, 2021
    Inventors: David J. Clarke, Stephen Denis Heffernan, Nijun Wei, Alan J. O'Donnell, Patrick Martin McGuinness, Shaun Bradley, Edward John Coyne, David Aherne, David M. Boland
  • Patent number: 11112436
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, an electrical overstress monitor and/or protection device includes a two different conductive structures configured to electrically arc in response to an EOS event and a sensing circuit configured to detect a change in a physical property of the two conductive structures caused by the EOS event. The two conductive structures have facing surfaces that have different shapes.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: September 7, 2021
    Assignee: Analog Devices International Unlimited Company
    Inventors: David J. Clarke, Stephen Denis Heffernan, Nijun Wei, Alan J. O'Donnell, Patrick Martin McGuinness, Shaun Bradley, Edward John Coyne, David Aherne, David M. Boland
  • Publication number: 20200400725
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, a device configured to monitor electrical overstress (EOS) events includes a pair of spaced conductive structures configured to electrically arc in response to an EOS event, wherein the spaced conductive structures are formed of a material and have a shape such that arcing causes a detectable change in shape of the spaced conductive structures, and wherein the device is configured such that the change in shape of the spaced conductive structures is detectable to serve as an EOS monitor.
    Type: Application
    Filed: June 5, 2020
    Publication date: December 24, 2020
    Inventors: David J. Clarke, Stephen Denis Heffernan, Alan J. O'Donnell, Patrick M. McGuinness
  • Patent number: 10677822
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, a device configured to monitor electrical overstress (EOS) events includes a pair of spaced conductive structures configured to electrically arc in response to an EOS event, wherein the spaced conductive structures are formed of a material and have a shape such that arcing causes a detectable change in shape of the spaced conductive structures, and wherein the device is configured such that the change in shape of the spaced conductive structures is detectable to serve as an EOS monitor.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: June 9, 2020
    Assignee: Analog Devices Global Unlimited Company
    Inventors: David J. Clarke, Stephen Denis Heffernan, Alan J. O'Donnell, Patrick M. McGuinness
  • Publication number: 20190293692
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, an electrical overstress monitor and/or protection device includes a two different conductive structures configured to electrically arc in response to an EOS event and a sensing circuit configured to detect a change in a physical property of the two conductive structures caused by the EOS event.
    Type: Application
    Filed: March 21, 2019
    Publication date: September 26, 2019
    Inventors: David J. Clarke, Stephen Denis Heffernan, Nijun Wei, Alan J. O'Donnell, Patrick Martin McGuinness, Shaun Bradley, Edward John Coyne, David Aherne, David M. Boland
  • Publication number: 20180088155
    Abstract: The disclosed technology generally relates to electrical overstress protection devices, and more particularly to electrical overstress monitoring devices for detecting electrical overstress events in semiconductor devices. In one aspect, a device configured to monitor electrical overstress (EOS) events includes a pair of spaced conductive structures configured to electrically arc in response to an EOS event, wherein the spaced conductive structures are formed of a material and have a shape such that arcing causes a detectable change in shape of the spaced conductive structures, and wherein the device is configured such that the change in shape of the spaced conductive structures is detectable to serve as an EOS monitor.
    Type: Application
    Filed: September 19, 2017
    Publication date: March 29, 2018
    Inventors: David J. Clarke, Stephen Denis Heffernan, Alan J. O'Donnell, Patrick M. McGuinness
  • Patent number: 9484739
    Abstract: A protection device is provided that exhibits a turn on time of order of one nanosecond or less. Such a device provides enhanced protection for integrated circuits against electrostatic discharge events. This in turn reduces the risk of device failure in use. The protection device can include a bipolar transistor structure connected between a node to be protected and a discharge path.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: November 1, 2016
    Assignee: ANALOG DEVICES GLOBAL
    Inventors: Edward John Coyne, John Twomey, Seamus P. Whiston, David J. Clarke, Donal P. McAuliffe, William Allan Lane, Stephen Denis Heffernan, Brian A. Moane, Brian Michael Sweeney, Patrick Martin McGuinness
  • Patent number: 9356011
    Abstract: Junction-isolated blocking voltage devices and methods of forming the same are provided. In certain implementations, a blocking voltage device includes an anode terminal electrically connected to a first p-well, a cathode terminal electrically connected to a first n-well, a ground terminal electrically connected to a second p-well, and an n-type isolation layer for isolating the first p-well from a p-type substrate. The first p-well and the first n-well operate as a blocking diode. The blocking voltage device further includes a PNPN silicon controlled rectifier (SCR) associated with a P+ region formed in the first n-well, the first n-well, the first p-well, and an N+ region formed in the first p-well. Additionally, the blocking voltage device further includes an NPNPN bidirectional SCR associated with an N+ region formed in the first p-well, the first p-well, the n-type isolation layer, the second p-well, and an N+ region formed in the second p-well.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: May 31, 2016
    Assignee: ANALOG DEVICES, INC.
    Inventors: David J. Clarke, Javier Alejandro Salcedo, Brian B. Moane, Juan Luo, Seamus Murnane, Kieran K. Heffernan, John Twomey, Stephen Denis Heffernan, Gavin Patrick Cosgrave
  • Publication number: 20160094026
    Abstract: A protection device is provided that exhibits a turn on time of order of one nanosecond or less. Such a device provides enhanced protection for integrated circuits against electrostatic discharge events. This in turn reduces the risk of device failure in use. The protection device can include a bipolar transistor structure connected between a node to be protected and a discharge path.
    Type: Application
    Filed: September 25, 2014
    Publication date: March 31, 2016
    Inventors: Edward John Coyne, John Twomey, Seamus P. Whiston, David J. Clarke, Donal P. McAuliffe, William Allan Lane, Stephen Denis Heffernan, Brian A. Moane, Brian Michael Sweeney, Patrick Martin McGuinness
  • Publication number: 20140332843
    Abstract: Junction-isolated blocking voltage devices and methods of forming the same are provided. In certain implementations, a blocking voltage device includes an anode terminal electrically connected to a first p-well, a cathode terminal electrically connected to a first n-well, a ground terminal electrically connected to a second p-well, and an n-type isolation layer for isolating the first p-well from a p-type substrate. The first p-well and the first n-well operate as a blocking diode. The blocking voltage device further includes a PNPN silicon controlled rectifier (SCR) associated with a P+ region formed in the first n-well, the first n-well, the first p-well, and an N+ region formed in the first p-well. Additionally, the blocking voltage device further includes an NPNPN bidirectional SCR associated with an N+ region formed in the first p-well, the first p-well, the n-type isolation layer, the second p-well, and an N+ region formed in the second p-well.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 13, 2014
    Inventors: David J. Clarke, Javier Alejandro Salcedo, Brian B. Moane, Juan Luo, Seamus Murnane, Kieran K. Heffernan, John Twomey, Stephen Denis Heffernan, Gavin Patrick Cosgrave
  • Patent number: 8796729
    Abstract: Junction-isolated blocking voltage devices and methods of forming the same are provided. In certain implementations, a blocking voltage device includes an anode terminal electrically connected to a first p-well, a cathode terminal electrically connected to a first n-well, a ground terminal electrically connected to a second p-well, and an n-type isolation layer for isolating the first p-well from a p-type substrate. The first p-well and the first n-well operate as a blocking diode. The blocking voltage device further includes a PNPN silicon controlled rectifier (SCR) associated with a P+ region formed in the first n-well, the first n-well, the first p-well, and an N+ region formed in the first p-well. Additionally, the blocking voltage device further includes an NPNPN bidirectional SCR associated with an N+ region formed in the first p-well, the first p-well, the n-type isolation layer, the second p-well, and an N+ region formed in the second p-well.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: August 5, 2014
    Assignee: Analog Devices, Inc.
    Inventors: David J Clarke, Javier Alejandro Salcedo, Brian B Moane, Juan Luo, Seamus Murnane, Kieran K Heffernan, John Twomey, Stephen Denis Heffernan, Gavin Patrick Cosgrave
  • Publication number: 20140138735
    Abstract: Junction-isolated blocking voltage devices and methods of forming the same are provided. In certain implementations, a blocking voltage device includes an anode terminal electrically connected to a first p-well, a cathode terminal electrically connected to a first n-well, a ground terminal electrically connected to a second p-well, and an n-type isolation layer for isolating the first p-well from a p-type substrate. The first p-well and the first n-well operate as a blocking diode. The blocking voltage device further includes a PNPN silicon controlled rectifier (SCR) associated with a P+ region formed in the first n-well, the first n-well, the first p-well, and an N+ region formed in the first p-well. Additionally, the blocking voltage device further includes an NPNPN bidirectional SCR associated with an N+ region formed in the first p-well, the first p-well, the n-type isolation layer, the second p-well, and an N+ region formed in the second p-well.
    Type: Application
    Filed: November 20, 2012
    Publication date: May 22, 2014
    Applicant: ANALOG DEVICES, INC.
    Inventors: DAVID J. CLARKE, JAVIER ALEJANDRO SALCEDO, BRIAN B. MOANE, JUAN LUO, SEAMUS MURNANE, KIERAN K. HEFFERNAN, JOHN TWOMEY, STEPHEN DENIS HEFFERNAN, GAVIN PATRICK COSGRAVE