Patents by Inventor Gregory G. Freeman

Gregory G. Freeman 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: 10191108
    Abstract: A sensor for on-chip monitoring the effects of operating conditions on a circuit, Integrated Circuit (IC) chips including the sensors, and a method of monitoring operating condition effects on-chip circuits, e.g., for the occurrence of electromigration. The sensor includes a multi-fingered driver associated with a monitored circuit, sensitive to known circuit parameter sensitivities. Sense and control logic circuit selectively driving the multi-fingered driver, and selectively monitoring for an expected multi-fingered driver response.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: January 29, 2019
    Assignee: Globalfoundries Inc.
    Inventors: Gregory G. Freeman, Siyuranga Koswatta, Paul S. McLaughlin, Daniel J. Poindexter, J. Campbell Scott, Scott Taylor, Gregory Uhlmann, James D. Warnock
  • Patent number: 9953873
    Abstract: Chip structures and fabrication methods for forming such chip structures. A first device structure has a structural feature comprised of a first dielectric material and a second device structure has a structural feature comprised of a second dielectric material. A semiconductor layer has a first section adjacent to the structural feature of the first device structure and a second section adjacent to the structural feature of the second device structure. The first section of the semiconductor layer has a popped relationship relative to the structural feature comprised of the first dielectric material. The second section of the semiconductor layer includes a portion that has a pinned relationship relative to a portion of the structural feature comprised of the second dielectric material.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 24, 2018
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Bhupesh Chandra, Claude Ortolland, Gregory G. Freeman, Viorel Ontalus, Christopher D. Sheraw, Timothy J. McArdle, Paul Chang
  • Patent number: 9906213
    Abstract: An inverter circuit for reducing runaway current due to applied voltage stress and temperature conditions comprises: first and second field effect transistor (FET) devices of opposite device polarities for driving a connected second stage device having a connected 2nd stage first and second FET devices, each 2nd stage device having a respective input gate terminal. The first FET and second FET devices have a respective output drive terminal, a first conductive structure connects the first FET output drive terminal to the input gate terminal of each the first and second connected FET device and further connects the first FET output drive terminal to the second FET output drive terminal through a ballasting resistor device. A second separate conductive structure connects the second FET output drive terminal to the input gate terminals and includes a path further connecting the second FET output drive terminal to the first FET output drive terminal through the ballasting resistor device.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 27, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Gregory G. Freeman, Siyuranga O. Koswatta
  • Publication number: 20170345719
    Abstract: Chip structures and fabrication methods for forming such chip structures. A first device structure has a structural feature comprised of a first dielectric material and a second device structure has a structural feature comprised of a second dielectric material. A semiconductor layer has a first section adjacent to the structural feature of the first device structure and a second section adjacent to the structural feature of the second device structure. The first section of the semiconductor layer has a popped relationship relative to the structural feature comprised of the first dielectric material. The second section of the semiconductor layer includes a portion that has a pinned relationship relative to a portion of the structural feature comprised of the second dielectric material.
    Type: Application
    Filed: May 24, 2016
    Publication date: November 30, 2017
    Inventors: Bhupesh Chandra, Claude Ortolland, Gregory G. Freeman, Viorel Ontalus, Christopher D. Sheraw, Timothy J. McArdle, Paul Chang
  • Publication number: 20170146592
    Abstract: A sensor for on-chip monitoring the effects of operating conditions on a circuit, Integrated Circuit (IC) chips including the sensors, and a method of monitoring operating condition effects on-chip circuits, e.g., for the occurrence of electromigration. The sensor includes a multi-fingered driver associated with a monitored circuit, sensitive to known circuit parameter sensitivities. Sense and control logic circuit selectively driving the multi-fingered driver, and selectively monitoring for an expected multi-fingered driver response.
    Type: Application
    Filed: November 19, 2015
    Publication date: May 25, 2017
    Inventors: Gregory G. Freeman, Siyuranga Koswatta, Paul S. McLaughlin, Daniel J. Poindexter, J. Campbell Scott, Scott Taylor, Gregory Uhlmann, James D. Warnock
  • Publication number: 20170133923
    Abstract: An inverter circuit for reducing runaway current due to applied voltage stress and temperature conditions comprises: first and second field effect transistor (FET) devices of opposite device polarities for driving a connected second stage device having a connected 2nd stage first and second FET devices, each 2nd stage device having a respective input gate terminal. The first FET and second FET devices have a respective output drive terminal, a first conductive structure connects the first FET output drive terminal to the input gate terminal of each the first and second connected FET device and further connects the first FET output drive terminal to the second FET output drive terminal through a ballasting resistor device. A second separate conductive structure connects the second FET output drive terminal to the input gate terminals and includes a path further connecting the second FET output drive terminal to the first FET output drive terminal through the ballasting resistor device.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 11, 2017
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Gregory G. Freeman, Siyuranga O. Koswatta
  • Patent number: 9552455
    Abstract: An efficient method of calculating maximum current limits for library gates in which a current limit includes the impact of self-heating effects associated with the maximum current. A maximum current solution is obtained in a self-consistent fashion, providing a way of determining the self-consistent solution in a rapid fashion without extensive numerical calculations or simulations. The present method provides a practical approach for characterizing a large library of gates for use in CMOS designs.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: January 24, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Daniel J. Poindexter, Gregory G. Freeman, Siyuranga O. Koswatta, J. Campbell Scott, Leon J. Sigal, James D. Warnock
  • Publication number: 20160224717
    Abstract: An efficient method of calculating maximum current limits for library gates in which a current limit includes the impact of self-heating effects associated with the maximum current. A maximum current solution is obtained in a self-consistent fashion, providing a way of determining the self-consistent solution in a rapid fashion without extensive numerical calculations or simulations. The present method provides a practical approach for characterizing a large library of gates for use in CMOS designs.
    Type: Application
    Filed: February 3, 2015
    Publication date: August 4, 2016
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Daniel J. Poindexter, Gregory G. Freeman, Siyuranga O. Koswatta, J. Campbell Scott, Leon J. Sigal, James D. Warnock
  • Patent number: 9406569
    Abstract: A semiconductor-on-insulator (SOI) substrate comprises a bulk semiconductor substrate, a buried insulator layer formed on the bulk substrate and an active semiconductor layer formed on the buried insulator layer. Impurities are implanted near the interface of the buried insulator layer and the active semiconductor layer. A diffusion barrier layer is formed between the impurities and an upper surface of the active semiconductor layer. The diffusion barrier layer prevents the impurities from diffusing therethrough.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: August 2, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Gregory G. Freeman, Kam Leung Lee, Chengwen Pei, Geng Wang, Yanli Zhang
  • Patent number: 9305999
    Abstract: A stack pad layers including a first pad oxide layer, a pad nitride layer, and a second pad oxide layer are formed on a semiconductor-on-insulator (SOI) substrate. A deep trench extending below a top surface or a bottom surface of a buried insulator layer of the SOI substrate and enclosing at least one top semiconductor region is formed by lithographic methods and etching. A stress-generating insulator material is deposited in the deep trench and recessed below a top surface of the SOI substrate to form a stress-generating buried insulator plug in the deep trench. A silicon oxide material is deposited in the deep trench, planarized, and recessed. The stack of pad layer is removed to expose substantially coplanar top surfaces of the top semiconductor layer and of silicon oxide plugs. The stress-generating buried insulator plug encloses, and generates a stress to, the at least one top semiconductor region.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: April 5, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Huilong Zhu, Brian J. Greene, Dureseti Chidambarrao, Gregory G. Freeman
  • Patent number: 9287399
    Abstract: A faceted intrinsic buffer semiconductor material is deposited on sidewalls of a source trench and a drain trench by selective epitaxy. A facet adjoins each edge at which an outer sidewall of a gate spacer adjoins a sidewall of the source trench or the drain trench. A doped semiconductor material is subsequently deposited to fill the source trench and the drain trench. The doped semiconductor material can be deposited such that the facets of the intrinsic buffer semiconductor material are extended and inner sidewalls of the deposited doped semiconductor material merges in each of the source trench and the drain trench. The doped semiconductor material can subsequently grow upward. Faceted intrinsic buffer semiconductor material portions allow greater outdiffusion of dopants near faceted corners while suppressing diffusion of dopants in regions of uniform width, thereby suppressing short channel effects.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: March 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Bhupesh Chandra, Paul Chang, Gregory G. Freeman, Dechao Guo, Judson R. Holt, Arvind Kumar, Timothy J. McArdle, Shreesh Narasimha, Viorel Ontalus, Sangameshwar Saudari, Christopher D. Sheraw, Matthew W. Stoker
  • Patent number: 9240354
    Abstract: A semiconductor-on-insulator (SOI) substrate comprises a bulk semiconductor substrate, a buried insulator layer formed on the bulk substrate and an active semiconductor layer formed on the buried insulator layer. Impurities are implanted near the interface of the buried insulator layer and the active semiconductor layer. A diffusion barrier layer is formed between the impurities and an upper surface of the active semiconductor layer. The diffusion barrier layer prevents the impurities from diffusing therethrough.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: January 19, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Gregory G. Freeman, Kam Leung Lee, Chengwen Pei, Geng Wang, Yanli Zhang
  • Publication number: 20150084096
    Abstract: A faceted intrinsic buffer semiconductor material is deposited on sidewalls of a source trench and a drain trench by selective epitaxy. A facet adjoins each edge at which an outer sidewall of a gate spacer adjoins a sidewall of the source trench or the drain trench. A doped semiconductor material is subsequently deposited to fill the source trench and the drain trench. The doped semiconductor material can be deposited such that the facets of the intrinsic buffer semiconductor material are extended and inner sidewalls of the deposited doped semiconductor material merges in each of the source trench and the drain trench. The doped semiconductor material can subsequently grow upward. Faceted intrinsic buffer semiconductor material portions allow greater outdiffusion of dopants near faceted corners while suppressing diffusion of dopants in regions of uniform width, thereby suppressing short channel effects.
    Type: Application
    Filed: October 7, 2014
    Publication date: March 26, 2015
    Inventors: Bhupesh Chandra, Paul Chang, Gregory G. Freeman, Dechao Guo, Judson R. Holt, Arvind Kumar, Timothy J. McArdle, Shreesh Narasimha, Viorel Ontalus, Sangameshwar Saudari, Christopher D. Sheraw, Matthew W. Stoker
  • Publication number: 20150056760
    Abstract: A semiconductor-on-insulator (SOI) substrate comprises a bulk semiconductor substrate, a buried insulator layer formed on the bulk substrate and an active semiconductor layer formed on the buried insulator layer. Impurities are implanted near the interface of the buried insulator layer and the active semiconductor layer. A diffusion barrier layer is formed between the impurities and an upper surface of the active semiconductor layer. The diffusion barrier layer prevents the impurities from diffusing therethrough.
    Type: Application
    Filed: October 21, 2014
    Publication date: February 26, 2015
    Inventors: Gregory G. Freeman, Kam Leung Lee, Chengwen Pei, Geng Wang, Yanli Zhang
  • Patent number: 8940595
    Abstract: A faceted intrinsic buffer semiconductor material is deposited on sidewalls of a source trench and a drain trench by selective epitaxy. A facet adjoins each edge at which an outer sidewall of a gate spacer adjoins a sidewall of the source trench or the drain trench. A doped semiconductor material is subsequently deposited to fill the source trench and the drain trench. The doped semiconductor material can be deposited such that the facets of the intrinsic buffer semiconductor material are extended and inner sidewalls of the deposited doped semiconductor material merges in each of the source trench and the drain trench. The doped semiconductor material can subsequently grow upward. Faceted intrinsic buffer semiconductor material portions allow greater outdiffusion of dopants near faceted corners while suppressing diffusion of dopants in regions of uniform width, thereby suppressing short channel effects.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 27, 2015
    Assignee: International Business Machines Corporation
    Inventors: Bhupesh Chandra, Paul Chang, Gregory G. Freeman, Dechao Guo, Judson R. Holt, Arvind Kumar, Timothy J. McArdle, Shreesh Narasimha, Viorel Ontalus, Sangameshwar Rao Saudari, Christopher D. Sheraw, Matthew W. Stoker
  • Publication number: 20140264558
    Abstract: A faceted intrinsic buffer semiconductor material is deposited on sidewalls of a source trench and a drain trench by selective epitaxy. A facet adjoins each edge at which an outer sidewall of a gate spacer adjoins a sidewall of the source trench or the drain trench. A doped semiconductor material is subsequently deposited to fill the source trench and the drain trench. The doped semiconductor material can be deposited such that the facets of the intrinsic buffer semiconductor material are extended and inner sidewalls of the deposited doped semiconductor material merges in each of the source trench and the drain trench. The doped semiconductor material can subsequently grow upward. Faceted intrinsic buffer semiconductor material portions allow greater outdiffusion of dopants near faceted corners while suppressing diffusion of dopants in regions of uniform width, thereby suppressing short channel effects.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Bhupesh Chandra, Paul Chang, Gregory G. Freeman, Dechao Guo, Judson R. Holt, Arvind Kumar, Timothy J. McArdle, Shreesh Narasimha, Viorel Ontalus, Sangameshwar Rao Saudari, Christopher D. Sheraw, Matthew W. Stoker
  • Publication number: 20140131782
    Abstract: A semiconductor-on-insulator (SOI) substrate comprises a bulk semiconductor substrate, a buried insulator layer formed on the bulk substrate and an active semiconductor layer formed on the buried insulator layer. Impurities are implanted near the interface of the buried insulator layer and the active semiconductor layer. A diffusion barrier layer is formed between the impurities and an upper surface of the active semiconductor layer. The diffusion barrier layer prevents the impurities from diffusing therethrough.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 15, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Gregory G. Freeman, Kam Leung Lee, Chengwen Pei, Geng Wang, Yanli Zhang
  • Patent number: 8629501
    Abstract: A stack pad layers including a first pad oxide layer, a pad nitride layer, and a second pad oxide layer are formed on a semiconductor-on-insulator (SOI) substrate. A deep trench extending below a top surface or a bottom surface of a buried insulator layer of the SOI substrate and enclosing at least one top semiconductor region is formed by lithographic methods and etching. A stress-generating insulator material is deposited in the deep trench and recessed below a top surface of the SOI substrate to form a stress-generating buried insulator plug in the deep trench. A silicon oxide material is deposited in the deep trench, planarized, and recessed. The stack of pad layer is removed to expose substantially coplanar top surfaces of the top semiconductor layer and of silicon oxide plugs. The stress-generating buried insulator plug encloses, and generates a stress to, the at least one top semiconductor region.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: January 14, 2014
    Assignee: International Business Machines Corporation
    Inventors: Huilong Zhu, Brian J. Greene, Dureseti Chidambarrao, Gregory G. Freeman
  • Patent number: 8232603
    Abstract: A gated diode structure and a method for fabricating the gated diode structure use a relaxed liner that is derived from a stressed liner that is typically used within the context of a field effect transistor formed simultaneously with the gated diode structure. The relaxed liner is formed incident to treatment, such as ion implantation treatment, of the stressed liner. The relaxed liner provides improved gated diode ideality in comparison with the stressed liner, absent any gated diode damage that may occur incident to stripping the stressed liner from the gated diode structure while using a reactive ion etch method.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: July 31, 2012
    Assignee: International Business Machines Corporation
    Inventors: Anthony I. Chou, Gregory G. Freeman, Kevin McStay, Shreesh Narasimha
  • Publication number: 20120139081
    Abstract: A stack pad layers including a first pad oxide layer, a pad nitride layer, and a second pad oxide layer are formed on a semiconductor-on-insulator (SOI) substrate. A deep trench extending below a top surface or a bottom surface of a buried insulator layer of the SOI substrate and enclosing at least one top semiconductor region is formed by lithographic methods and etching. A stress-generating insulator material is deposited in the deep trench and recessed below a top surface of the SOI substrate to form a stress-generating buried insulator plug in the deep trench. A silicon oxide material is deposited in the deep trench, planarized, and recessed. The stack of pad layer is removed to expose substantially coplanar top surfaces of the top semiconductor layer and of silicon oxide plugs. The stress-generating buried insulator plug encloses, and generates a stress to, the at least one top semiconductor region.
    Type: Application
    Filed: February 10, 2012
    Publication date: June 7, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Huilong Zhu, Brian J. Greene, Dureseti Chidambarrao, Gregory G. Freeman