Patents by Inventor Thomas J. Dunbar

Thomas J. Dunbar 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: 20150244345
    Abstract: Tunable filter structures, methods of manufacture and design structures are disclosed. The method of forming a filter structure includes forming a piezoelectric resonance filter over a cavity structure. The forming of the piezoelectric resonance filter includes: forming an upper electrode on one side of a piezoelectric material; and forming a lower electrode on an opposing side of the piezoelectric material. The method further includes forming a micro-electro-mechanical structure (MEMS) cantilever beam at a location in which, upon actuation, makes contact with the piezoelectric resonance filter.
    Type: Application
    Filed: April 30, 2015
    Publication date: August 27, 2015
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Mark D. JAFFE, Robert K. LEIDY, Anthony K. STAMPER
  • Patent number: 9099982
    Abstract: Switchable and/or tunable filters, methods of manufacture and design structures are provided herein. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed on a piezoelectric substrate. The method further includes forming a fixed electrode with a plurality of fingers on the piezoelectric substrate. The method further includes forming a moveable electrode with a plurality of fingers over the piezoelectric substrate. The method further includes forming actuators aligned with one or more of the plurality of fingers of the moveable electrode.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 4, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Jeffrey P. Gambino, Mark D. Jaffe, Anthony K. Stamper, Randy L. Wolf
  • Patent number: 9058455
    Abstract: A design structure for an integrated radio frequency (RF) filter on a backside of a semiconductor substrate includes: a device on a first side of a substrate; a radio frequency (RF) filter on a backside of the substrate; and at least one substrate conductor extending from the front side of the substrate to the backside of the substrate and electrically coupling the RF filter to the device.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: June 16, 2015
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Jeffrey P. Gambino, Mark D. Jaffe, Anthony K. Stamper, Randy L. Wolf
  • Patent number: 9054671
    Abstract: Tunable filter structures, methods of manufacture and design structures are disclosed. The method of forming a filter structure includes forming a piezoelectric resonance filter over a cavity structure. The forming of the piezoelectric resonance filter includes: forming an upper electrode on one side of a piezoelectric material; and forming a lower electrode on an opposing side of the piezoelectric material. The method further includes forming a micro-electro-mechanical structure (MEMS) cantilever beam at a location in which, upon actuation, makes contact with the piezoelectric resonance filter.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: June 9, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Mark D. Jaffe, Robert K. Leidy, Anthony K. Stamper
  • Patent number: 9048809
    Abstract: Switchable and/or tunable filters and methods of manufacture. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed on a piezoelectric substrate. The method further includes forming a micro-electro-mechanical structure (MEMS) comprising a MEMS beam formed above the piezoelectric substrate and at a location in which, upon actuation, the MEMS beam shorts the piezoelectric filter structure by contacting at least one of the plurality of electrodes.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: June 2, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Jeffrey P. Gambino, Mark D. Jaffe, Anthony K. Stamper, Randy L. Wolf
  • Publication number: 20150054094
    Abstract: A method includes forming a hardmask over one or more gate structures. The method further includes forming a photoresist over the hardmask. The method further includes forming an opening in the photoresist over at least one of the gate structures. The method further includes stripping the hardmask that is exposed in the opening and which is over the at least one of the gate structures. The method further includes removing the photoresist. The method further includes providing a halo implant on a side of the least one of the at least one of the gate structures.
    Type: Application
    Filed: October 3, 2014
    Publication date: February 26, 2015
    Inventors: Darshana N. BHAGAT, Thomas J. DUNBAR, Yen L. LIM, Jed H. RANKIN, Eva S. HOLMES
  • Patent number: 8957405
    Abstract: Manufacturing a semiconductor structure including: forming a seed material on a sidewall of a mandrel; forming a graphene field effect transistor (FET) on the seed material; and removing the seed material.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: February 17, 2015
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Thomas J. Dunbar, Jeffrey P. Gambino, Molly J. Leitch
  • Publication number: 20150042418
    Abstract: Switchable and/or tunable filters, methods of manufacture and design structures are disclosed herein. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed on a piezoelectric substrate. The method further includes forming a micro-electro-mechanical structure (MEMS) comprising a MEMS beam formed above the piezoelectric substrate and at a location in which, upon actuation, the MEMS beam shorts the piezoelectric filter structure by contacting at least one of the plurality of electrodes.
    Type: Application
    Filed: October 24, 2014
    Publication date: February 12, 2015
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF
  • Patent number: 8910355
    Abstract: Manufacturing a semiconductor structure including modifying a frequency of a Film Bulk Acoustic Resonator (FBAR) device though a vent hole of a sealing layer surrounding the FBAR device.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: December 16, 2014
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Jeffrey P. Gambino, Mark D. Jaffe, Anthony K. Stamper, Randy L. Wolf
  • Patent number: 8877596
    Abstract: a method comprises forming a hardmask over one or more gate structures. The method further comprises forming a photoresist over the hardmask. The method further comprises forming an opening in the photoresist over at least one of the gate structures. The method further comprises stripping the hardmask that is exposed in the opening and which is over the at least one of the gate structures. The method further comprises removing the photoresist. The method further comprises providing a halo implant on a side of the at least one of the gate structures.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: November 4, 2014
    Assignee: International Business Machines Corporation
    Inventors: Darshana N. Bhagat, Thomas J. Dunbar, Yen Li Lim, Jed H. Rankin, Eva A. Shah
  • Publication number: 20140131661
    Abstract: Manufacturing a semiconductor structure including: forming a seed material on a sidewall of a mandrel; forming a graphene field effect transistor (FET) on the seed material; and removing the seed material.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Molly J. LEITCH
  • Patent number: 8723392
    Abstract: Disclosed herein is a surface acoustic wave (SAW) filter and method of making the same. The SAW filter includes a piezoelectric substrate; a planar barrier layer disposed above the piezoelectric substrate, and at least one conductor buried in the piezoelectric substrate and the planar barrier layer.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: May 13, 2014
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Panglijen Candra, Thomas J. Dunbar, Jeffrey P. Gambino, Mark D. Jaffe, Anthony K. Stamper, Randy L. Wolf
  • Patent number: 8691690
    Abstract: Disclosed are embodiments of a contact formation technique that incorporates a preventative etch step to reduce interlayer dielectric material flaking (e.g., borophosphosilicate glass (BPSG) flaking) and, thereby to reduce surface defects. Specifically, contact openings, which extend through a dielectric layer to semiconductor devices in and/or on a center portion of a substrate, can be filled with a conductor layer deposited by chemical vapor deposition (CVD). Chemical mechanical polishing (CMP) of the conductor layer can be performed to complete the contact structures. However, before the CMP process is performed (e.g., either before the contact openings are ever formed or before the contact openings are filled), a preventative etch process can be performed to remove any dielectric material from above the edge portion of the substrate. Removing the dielectric material from above the edge portion of the substrate prior to CMP reduces the occurrence of surface defects caused by dielectric material flaking.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: April 8, 2014
    Assignee: International Business Machines Corporation
    Inventors: Yoba Amoah, Brian M. Czabaj, Thomas J. Dunbar, Jeffrey P. Gambino, Molly J. Leitch, Polina A. Razina
  • Patent number: 8673683
    Abstract: Manufacturing a semiconductor structure including: forming a seed material on an insulator layer; forming a graphene field effect transistor (FET) on the seed material; and forming an air gap under the graphene FET by removing the seed material.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: March 18, 2014
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Thomas J. Dunbar, Jeffrey P. Gambino, Molly J. Leitch, Edward J. Nowak
  • Patent number: 8633055
    Abstract: Manufacturing a semiconductor structure including: forming a seed material on a sidewall of a mandrel; forming a graphene field effect transistor (FET) on the seed material; and removing the seed material.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: January 21, 2014
    Assignee: International Business Machines Corporation
    Inventors: James W. Adkisson, Thomas J. Dunbar, Jeffrey P. Gambino, Molly J. Leitch
  • Publication number: 20130214877
    Abstract: Switchable and/or tunable filters, methods of manufacture and design structures are disclosed herein. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed to be in contact with at least one piezoelectric substrate. The method further includes forming a micro-electro-mechanical structure (MEMS) comprising a MEMS beam in which, upon actuation, the MEMS beam will turn on the at least one piezoelectric filter structure by interleaving electrodes in contact with the piezoelectric substrate or sandwiching the at least one piezoelectric substrate between the electrodes.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 22, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF
  • Publication number: 20130187729
    Abstract: Switchable and/or tunable filters, methods of manufacture and design structures are disclosed herein. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed on a piezoelectric substrate. The method further includes forming a fixed electrode with a plurality of fingers on the piezoelectric substrate. The method further includes forming a moveable electrode with a plurality of fingers over the piezoelectric substrate. The method further includes forming actuators aligned with one or more of the plurality of fingers of the moveable electrode.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 25, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF
  • Publication number: 20130187246
    Abstract: A design structure for an integrated radio frequency (RF) filter on a backside of a semiconductor substrate includes: a device on a first side of a substrate; a radio frequency (RF) filter on a backside of the substrate; and at least one substrate conductor extending from the front side of the substrate to the backside of the substrate and electrically coupling the RF filter to the device.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF
  • Publication number: 20130169383
    Abstract: Switchable and/or tunable filters, methods of manufacture and design structures are disclosed herein. The method of forming the filters includes forming at least one piezoelectric filter structure comprising a plurality of electrodes formed on a piezoelectric substrate. The method further includes forming a micro-electro-mechanical structure (MEMS) comprising a MEMS beam formed above the piezoelectric substrate and at a location in which, upon actuation, the MEMS beam shorts the piezoelectric filter structure by contacting at least one of the plurality of electrodes.
    Type: Application
    Filed: January 3, 2012
    Publication date: July 4, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF
  • Publication number: 20130147319
    Abstract: Manufacturing a semiconductor structure including modifying a frequency of a Film Bulk Acoustic Resonator (FBAR) device though a vent hole of a sealing layer surrounding the FBAR device.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 13, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: James W. ADKISSON, Panglijen CANDRA, Thomas J. DUNBAR, Jeffrey P. GAMBINO, Mark D. JAFFE, Anthony K. STAMPER, Randy L. WOLF