Patents by Inventor Lyndon R. Logan

Lyndon R. Logan 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: 9972550
    Abstract: A source/drain epitaxial electrical monitor and methods of characterizing epitaxial growth through capacitance measurements are provided. The structure includes a plurality of fin structures; one or more gate structures, perpendicular to and intersecting the plurality of fin structures. The structure further includes a first connection by a first contact at one fin-end of every other fin structure of the plurality of fin structures, and a second connection by a second contact at one end of an alternate fin structure of the plurality of fin structures.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: May 15, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Edward J. Nowak, Robert R. Robison, Lyndon R. Logan
  • Patent number: 9941179
    Abstract: Approaches for characterizing a shallow trench isolation (STI) divot depth are provided. The approach includes measuring a first capacitance at a first region of a substrate where at least one first gate line crosses over a boundary junction between a STI region and an active region. The approach also includes measuring a second capacitance at a second region of the substrate where at least one second gate line crosses over the active region. The approach further includes calculating a capacitance associated with a divot at the first region based on a difference between the first capacitance at the first region and the second capacitance at the second region.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: April 10, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison, Yan He
  • Publication number: 20170098585
    Abstract: A source/drain epitaxial electrical monitor and methods of characterizing epitaxial growth through capacitance measurements are provided. The structure includes a plurality of fin structures; one or more gate structures, perpendicular to and intersecting the plurality of fin structures. The structure further includes a first connection by a first contact at one fin-end of every other fin structure of the plurality of fin structures, and a second connection by a second contact at one end of an alternate fin structure of the plurality of fin structures.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 6, 2017
    Inventors: Edward J. NOWAK, Robert R. ROBISON, Lyndon R. LOGAN
  • Publication number: 20170062609
    Abstract: Devices and methods for a high voltage FinFET with a shaped drift region include a lateral diffusion metal oxide semiconductor (LDMOS) FinFET having a substrate with a top surface and a fin attached to the top surface. The fin includes a source region having a first type of doping, an undoped gate-control region adjacent the source region, a drift region adjacent the undoped gate-control region opposite the source region, and a drain region. The amount of doping of the source region is greater than the amount of doping in the drift region. The drain region is adjacent to the drift region and has the same type of doping. The fin is tapered in the drift region, being wider closest to the undoped gate-control region and thinner closest to the drain region. A gate stack is attached to the top surface of the substrate and located with the undoped gate-control region.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison
  • Publication number: 20160380095
    Abstract: Devices and methods for a high voltage FinFET with a shaped drift region include a lateral diffusion metal oxide semiconductor (LDMOS) FinFET having a substrate with a top surface and a fin attached to the top surface. This fin includes a source region having a first type of doping, an undoped gate-control region adjacent the source region, a drift region adjacent the undoped gate-control region opposite the source region, and a drain region. The amount of doping of the source region is greater than the amount in the drift region. The drain region has the same type of doping and is adjacent the drift region. The fin in the drift region is tapered, being wider closest to the undoped gate-control region and thinner closest to the drain region. A gate stack is attached to the top surface of the substrate and located with the undoped gate-control region.
    Type: Application
    Filed: June 25, 2015
    Publication date: December 29, 2016
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison
  • Publication number: 20160370311
    Abstract: Approaches for characterizing a shallow trench isolation (STI) divot depth are provided. The approach includes measuring a first capacitance at a first region of a substrate where at least one first gate line crosses over a boundary junction between a STI region and an active region. The approach also includes measuring a second capacitance at a second region of the substrate where at least one second gate line crosses over the active region. The approach further includes calculating a capacitance associated with a divot at the first region based on a difference between the first capacitance at the first region and the second capacitance at the second region.
    Type: Application
    Filed: June 18, 2015
    Publication date: December 22, 2016
    Inventors: Lyndon R. LOGAN, Edward J. NOWAK, Robert R. ROBISON, Yan HE
  • Patent number: 9318622
    Abstract: Structures and methods of manufacturing a fin-type PIN diode array include forming a plurality of first charge-type doped silicon fins disposed in parallel on a planar substrate in a first direction, forming undoped epitaxial growths of silicon at intervals along a length of each silicon fin, where each epitaxial growth includes a depleted intrinsic region, and forming a plurality of second charge-type doped polysilicon fins disposed in parallel and disposed perpendicularly to the first direction. The polysilicon fins are formed to contact, at intervals along a length of each polysilicon fin, an uppermost surface of one of the undoped epitaxial growths of silicon, to form a PIN diode at each intersection of each of the first charge-type doped silicon fins and the second charge-type doped polysilicon fins.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: April 19, 2016
    Assignee: International Business Machines Corporation
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison
  • Patent number: 9105707
    Abstract: Approaches for zero capacitance memory cells are provided. A method of manufacturing a semiconductor structure includes forming a channel region by doping a first material with a first type of impurity. The method includes forming source/drain regions by doping a second material with a second type of impurity different than the first type of impurity, wherein the second material has a smaller bandgap than the first material. The method includes forming lightly doped regions between the channel region and the source/drain regions, wherein the lightly doped regions include the second material. The method includes forming a gate over the channel region, wherein the second material extends under edges of the gate.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: August 11, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Andres Bryant, Lyndon R. Logan, Edward J. Nowak, Robert R. Robison
  • Patent number: 9059190
    Abstract: A plurality of diode/resistor devices are formed within an integrated circuit structure using manufacturing equipment operatively connected to a computerized machine. Each of the diode/resistor devices comprises a diode device and a resistor device integrated into a single structure. The resistance of each of the diode/resistor devices is measured during testing of the integrated circuit structure using testing equipment operatively connected to the computerized machine. The current through each of the diode/resistor devices is also measured during testing of the integrated circuit structure using the testing equipment. Then, response curves for the resistance and the current are computed as a function of variations of characteristics of transistor devices within the integrated circuit structure and/or variations of manufacturing processes of the transistor devices within the integrated circuit structure.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: June 16, 2015
    Assignee: International Business Machines Corporation
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison, Jonathan K. Winslow, II
  • Publication number: 20150028397
    Abstract: Approaches for zero capacitance memory cells are provided. A method of manufacturing a semiconductor structure includes forming a channel region by doping a first material with a first type of impurity. The method includes forming source/drain regions by doping a second material with a second type of impurity different than the first type of impurity, wherein the second material has a smaller bandgap than the first material. The method includes forming lightly doped regions between the channel region and the source/drain regions, wherein the lightly doped regions include the second material. The method includes forming a gate over the channel region, wherein the second material extends under edges of the gate.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Andres BRYANT, Lyndon R. LOGAN, Edward J. NOWAK, Robert R. ROBISON
  • Publication number: 20140191235
    Abstract: A plurality of diode/resistor devices are formed within an integrated circuit structure using manufacturing equipment operatively connected to a computerized machine. Each of the diode/resistor devices comprises a diode device and a resistor device integrated into a single structure. The resistance of each of the diode/resistor devices is measured during testing of the integrated circuit structure using testing equipment operatively connected to the computerized machine. The current through each of the diode/resistor devices is also measured during testing of the integrated circuit structure using the testing equipment. Then, response curves for the resistance and the current are computed as a function of variations of characteristics of transistor devices within the integrated circuit structure and/or variations of manufacturing processes of the transistor devices within the integrated circuit structure.
    Type: Application
    Filed: February 25, 2014
    Publication date: July 10, 2014
    Applicant: International Business Machines Corporation
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison, Jonathan K. Winslow
  • Patent number: 8709833
    Abstract: A plurality of diode/resistor devices are formed within an integrated circuit structure using manufacturing equipment operatively connected to a computerized machine. Each of the diode/resistor devices comprises a diode device and a resistor device integrated into a single structure. The resistance of each of the diode/resistor devices is measured during testing of the integrated circuit structure using testing equipment operatively connected to the computerized machine. The current through each of the diode/resistor devices is also measured during testing of the integrated circuit structure using the testing equipment. Then, response curves for the resistance and the current are computed as a function of variations of characteristics of transistor devices within the integrated circuit structure and/or variations of manufacturing processes of the transistor devices within the integrated circuit structure.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 29, 2014
    Assignee: International Business Machines Corporation
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison, Jonathan K. Winslow, II
  • Publication number: 20130161615
    Abstract: A plurality of diode/resistor devices are formed within an integrated circuit structure using manufacturing equipment operatively connected to a computerized machine. Each of the diode/resistor devices comprises a diode device and a resistor device integrated into a single structure. The resistance of each of the diode/resistor devices is measured during testing of the integrated circuit structure using testing equipment operatively connected to the computerized machine. The current through each of the diode/resistor devices is also measured during testing of the integrated circuit structure using the testing equipment. Then, response curves for the resistance and the current are computed as a function of variations of characteristics of transistor devices within the integrated circuit structure and/or variations of manufacturing processes of the transistor devices within the integrated circuit structure.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: International Business Machines Corporation
    Inventors: Lyndon R. Logan, Edward J. Nowak, Robert R. Robison, Jonathan K. Winslow, II
  • Patent number: 8000935
    Abstract: A diagnostic method of and computer system for root-cause analysis of performance variations of FETs in integrated circuits and a method and computer system for monitoring a field effect transistor manufacturing process. The diagnostic method includes measuring source currents in the linear and saturated regions of two FETs, calculating ratios of the source currents in the linear and saturated regions for the and two FETs and comparing the ratios of the two FETs to determine a probable root cause for a performance variation between the two FETs. One of the FETs has a known good performance.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: August 16, 2011
    Assignee: International Business Machines Corporation
    Inventor: Lyndon R. Logan
  • Publication number: 20090234617
    Abstract: A diagnostic method of and computer system for root-cause analysis of performance variations of FETs in integrated circuits and a method and computer system for monitoring a field effect transistor manufacturing process. The diagnostic method includes measuring source currents in the linear and saturated regions of two FETs, calculating ratios of the source currents in the linear and saturated regions for the and two FETs and comparing the ratios of the two FETs to determine a probable root cause for a performance variation between the two FETs. One of the FETs has a known good performance.
    Type: Application
    Filed: May 27, 2009
    Publication date: September 17, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Lyndon R. Logan
  • Patent number: 7587298
    Abstract: A diagnostic method of and computer system for root-cause analysis of performance variations of FETs in integrated circuits and a method and computer system for monitoring a field effect transistor manufacturing process. The diagnostic method includes measuring source currents in the linear and saturated regions of two FETs, calculating ratios of the source currents in the linear and saturated regions for the and two FETs and comparing the ratios of the two FETs to determine a probable root cause for a performance variation between the two FETs. One of the FETs has a known good performance.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: September 8, 2009
    Assignee: International Business Machines Corporation
    Inventor: Lyndon R. Logan
  • Publication number: 20090099819
    Abstract: A diagnostic method of and computer system for root-cause analysis of performance variations of FETs in integrated circuits and a method and computer system for monitoring a field effect transistor manufacturing process. The diagnostic method includes measuring source currents in the linear and saturated regions of two FETs, calculating ratios of the source currents in the linear and saturated regions for the and two FETs and comparing the ratios of the two FETs to determine a probable root cause for a performance variation between the two FETs. One of the FETs has a known good performance.
    Type: Application
    Filed: October 12, 2007
    Publication date: April 16, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Lyndon R. Logan
  • Patent number: 6946710
    Abstract: A method of forming a semiconductor device with improved leakage control, includes: providing a semiconductor substrate; forming a trench in the substrate; forming a leakage stop implant in the substrate under the bottom of the trench and under and align to a sidewall of the trench; filling the trench with an insulator; and forming an N-well (or a P-well) in the substrate adjacent to and in contact with an opposite sidewall of the trench, the N-well (or the P-well) extending under the trench and forming an upper portion of an isolation junction with the leakage stop implant, the upper portion of the isolation junction located entirely under the trench. The leakage control implant is self-aligned to the trench sidewalls.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: September 20, 2005
    Assignee: International Business Machines Corporation
    Inventors: Lyndon R. Logan, James A. Slinkman
  • Publication number: 20040173847
    Abstract: High performance asymmetric transistors including controllable diode characteristics at the source and/or drain are developed by supplying impurities with high accuracy of location by angled implants in a trench or diffusion from a solid body formed as a sidewall of doped material. High concentration gradient of impurities to support high performance is achieved by providing for reduced heat treatment after the impurity is supplied in order to limit diffusion previously necessary to achieve the desired location of impurity structures. Damascene or quasi-Damascene gate structures are also provided for high dimensional uniformity, increased manufacturing yield and structural integrity of the transistor.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 9, 2004
    Inventors: James W. Adkisson, Michael J. Hargrove, Lyndon R. Logan, Isabel Y. Yang
  • Publication number: 20040166620
    Abstract: A method of forming a semiconductor device with improved leakage control, includes: providing a semiconductor substrate; forming a trench in the substrate; forming a leakage stop implant in the substrate under the bottom of the trench and under and aligned to a sidewall of the trench; filling the trench with an insulator; and forming an N-well (or a P-well) in the substrate adjacent to and in contact with an opposite sidewall of the trench, the N-well (or the N-well) extending under the trench and forming an upper portion of an isolation junction with the leakage stop implant, the upper portion of the isolation junction located entirely under the trench. The leakage control implant is self-aligned to the trench sidewalls.
    Type: Application
    Filed: October 16, 2003
    Publication date: August 26, 2004
    Inventors: Lyndon R. Logan, James A. Slinkman