Patents by Inventor Shreesh Narasimha

Shreesh Narasimha 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: 20180197734
    Abstract: Reducing wormhole formation during n-type transistor fabrication includes providing a starting structure, the starting structure including a semiconductor substrate, a n-type source region and a n-type drain region of a transistor. The method further includes removing a portion of each of the n-type source region and the n-type drain region, the removing creating a source trench and a drain trench, and forming a buffer layer of silicon-based material(s) over the n-type source region and n-type drain region that is sufficiently thick to inhibit interaction between metal contaminants that may be present below surfaces of the n-type source trench and/or the n-type drain trench, and halogens subsequently introduced prior to source and drain formation. A resulting semiconductor structure is also provided.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Bhupesh CHANDRA, Annie LEVESQUE, Matthew W. STOKER, Shreesh NARASIMHA, Viorel ONTALUS, Michael STEIGERWALT, Joshua BELL
  • Patent number: 9922831
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: March 20, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Publication number: 20180076039
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Application
    Filed: November 15, 2017
    Publication date: March 15, 2018
    Inventors: Anthony I. CHOU, Arvind KUMAR, Chung-Hsun LIN, Shreesh NARASIMHA, Claude ORTOLLAND, Jonathan T. SHAW
  • Publication number: 20180061645
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Application
    Filed: October 30, 2017
    Publication date: March 1, 2018
    Inventors: Anthony I. CHOU, Arvind KUMAR, Chung-Hsun LIN, Shreesh NARASIMHA, Claude ORTOLLAND, Jonathan T. SHAW
  • Publication number: 20180061646
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Application
    Filed: October 23, 2017
    Publication date: March 1, 2018
    Inventors: Anthony I. CHOU, Arvind KUMAR, Chung-Hsun LIN, Shreesh NARASIMHA, Claude ORTOLLAND, Jonathan T. SHAW
  • Patent number: 9859122
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: January 2, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Patent number: 9837319
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: December 5, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Publication number: 20170338145
    Abstract: A metal-oxide-semiconductor field-effect transistor (MOSFET) with integrated passive structures and methods of manufacturing the same is disclosed. The method includes forming a stacked structure in an active region and at least one shallow trench isolation (STI) structure adjacent to the stacked structure. The method further includes forming a semiconductor layer directly in contact with the at least one STI structure and the stacked structure. The method further includes patterning the semiconductor layer and the stacked structure to form an active device in the active region and a passive structure of the semiconductor layer directly on the at least one STI structure.
    Type: Application
    Filed: August 4, 2017
    Publication date: November 23, 2017
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Patent number: 9812396
    Abstract: A method includes providing a starting interconnect structure for semiconductor device(s), the starting interconnect structure including a first metallization layer with a first power rail. The method further includes forming a second metallization layer over the first metallization layer with a second power rail, and directly electrically connecting the first power rail and the second power rail, the directly electrically connecting including forming metal-filled vias between the first power rail and the second power rail. The method further includes forming additional metallization layer(s) over the second metallization layer with additional power rail(s), and directly electrically connecting each of the additional power rail(s) to a power rail of a metallization layer directly below.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: November 7, 2017
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Jason Eugene Stephens, Guillaume Bouche, Shreesh Narasimha, Patrick Ryan Justison, Byoung Youp Kim, Craig Michael Child, Jr.
  • Patent number: 9812324
    Abstract: A method includes providing a semiconductor structure having a substrate including a longitudinally extending plurality of fins formed thereon. A target layout pattern is determined, which overlays active areas devices disposed on the fins. The target layout pattern includes a first group of sections overlaying devices having more fins than adjacent devices and a second group of sections overlaying devices having less fins than adjacent devices. A first extended exposure pattern is patterned into the structure, and includes extensions that extend sections of the first group toward adjacent sections of the first group. A second extended exposure pattern is patterned into the structure, and includes extensions that extend sections of the second group toward adjacent sections of the second group. Portions of the first and second extended exposure patterns are combined to form a final pattern overlaying the same active areas as the target pattern.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: November 7, 2017
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Lei Zhuang, Lars Liebmann, Stuart A. Sieg, Fee Li Lie, Mahender Kumar, Shreesh Narasimha, Ahmed Hassan, Guillaume Bouche, Xintuo Dai
  • Patent number: 9786545
    Abstract: A method includes providing a structure having a first hardmask layer, interposer layer, second hardmask layer and mandrel layer disposed respectively over a dielectric stack. An array of mandrels is patterned into the mandrel layer with a mandrel mask. An ANA trench is patterned into the mandrel layer with a first cut mask. The ANA trench is patterned into the interposer layer with a second cut mask. An organic planarization layer (OPL) is disposed over the structure. The OPL is etched to dispose it only in the ANA trench such that a top surface of the OPL is lower than the second hardmask layer. The structure is etched to form a pattern in a dielectric layer of the dielectric stack to form an array of metal lines in the dielectric layer, a portion of the pattern formed by the ANA trench forms an ANA region within the dielectric layer.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 10, 2017
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Guillaume Bouche, Jason Eugene Stephens, Byoung Youp Kim, Craig Michael Child, Jr., Shreesh Narasimha
  • Patent number: 9768071
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: September 19, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Patent number: 9768195
    Abstract: A metal-oxide-semiconductor field-effect transistor (MOSFET) with integrated passive structures and methods of manufacturing the same is disclosed. The method includes forming a stacked structure in an active region and at least one shallow trench isolation (STI) structure adjacent to the stacked structure. The method further includes forming a semiconductor layer directly in contact with the at least one STI structure and the stacked structure. The method further includes patterning the semiconductor layer and the stacked structure to form an active device in the active region and a passive structure of the semiconductor layer directly on the at least one STI structure.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 19, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Publication number: 20170236898
    Abstract: A metal-oxide-semiconductor field-effect transistor (MOSFET) with integrated passive structures and methods of manufacturing the same is disclosed. The method includes forming a stacked structure in an active region and at least one shallow trench isolation (STI) structure adjacent to the stacked structure. The method further includes forming a semiconductor layer directly in contact with the at least one STI structure and the stacked structure. The method further includes patterning the semiconductor layer and the stacked structure to form an active device in the active region and a passive structure of the semiconductor layer directly on the at least one STI structure.
    Type: Application
    Filed: May 1, 2017
    Publication date: August 17, 2017
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Patent number: 9721843
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: August 1, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Patent number: 9698159
    Abstract: A metal-oxide-semiconductor field-effect transistor (MOSFET) with integrated passive structures and methods of manufacturing the same is disclosed. The method includes forming a stacked structure in an active region and at least one shallow trench isolation (STI) structure adjacent to the stacked structure. The method further includes forming a semiconductor layer directly in contact with the at least one STI structure and the stacked structure. The method further includes patterning the semiconductor layer and the stacked structure to form an active device in the active region and a passive structure of the semiconductor layer directly on the at least one STI structure.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: July 4, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Publication number: 20170178913
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Application
    Filed: March 6, 2017
    Publication date: June 22, 2017
    Inventors: Anthony I. CHOU, Arvind KUMAR, Chung-Hsun LIN, Shreesh NARASIMHA, Claude ORTOLLAND, Jonathan T. SHAW
  • Patent number: 9685379
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: June 20, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Chung-Hsun Lin, Shreesh Narasimha, Claude Ortolland, Jonathan T. Shaw
  • Patent number: 9659961
    Abstract: A metal-oxide-semiconductor field-effect transistor (MOSFET) with integrated passive structures and methods of manufacturing the same is disclosed. The method includes forming a stacked structure in an active region and at least one shallow trench isolation (STI) structure adjacent to the stacked structure. The method further includes forming a semiconductor layer directly in contact with the at least one STI structure and the stacked structure. The method further includes patterning the semiconductor layer and the stacked structure to form an active device in the active region and a passive structure of the semiconductor layer directly on the at least one STI structure.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: May 23, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Publication number: 20170125542
    Abstract: An asymmetric high-k dielectric for reduced gate induced drain leakage in high-k MOSFETs and methods of manufacture are disclosed. The method includes performing an implant process on a high-k dielectric sidewall of a gate structure. The method further includes performing an oxygen annealing process to grow an oxide region on a drain side of the gate structure, while inhibiting oxide growth on a source side of the gate structure adjacent to a source region.
    Type: Application
    Filed: January 13, 2017
    Publication date: May 4, 2017
    Inventors: Anthony I. CHOU, Arvind KUMAR, Chung-Hsun LIN, Shreesh NARASIMHA, Claude ORTOLLAND, Jonathan T. SHAW