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: 20140106550
    Abstract: A method of ion implantation is disclosed. A beam of ions is accelerated to a first energy level. The beam of ions is decelerated from the first energy level to produce a contamination beam of ions via an ion collision process. The ions of the contamination beam are implanted in a substrate to obtain a selected dopant profile in the substrate.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 17, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Murshed M. Chowdhury, Arvind Kumar, Shreesh Narasimha, Craig M. Sinn
  • Publication number: 20140103457
    Abstract: A semiconductor device including a gate structure present on a channel portion of a semiconductor substrate and at least one gate sidewall spacer adjacent to the gate structure. In one embodiment, the gate structure includes a work function metal layer present on a gate dielectric layer, a metal semiconductor alloy layer present on a work function metal layer, and a dielectric capping layer present on the metal semiconductor alloy layer. The at least one gate sidewall spacer and the dielectric capping layer may encapsulate the metal semiconductor alloy layer within the gate structure.
    Type: Application
    Filed: October 17, 2012
    Publication date: April 17, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cyril Cabral, JR., Josephine B. Chang, Michael P. Chudzik, Martin M. Frank, Michael A. Guillorn, Christian Lavoie, Shreesh Narasimha, Vijay Narayanan
  • Patent number: 8698128
    Abstract: Non-planar semiconductor devices are provided that include at least one semiconductor nanowire suspended above a semiconductor oxide layer that is present on a first portion of a bulk semiconductor substrate. An end segment of the at least one semiconductor nanowire is attached to a first semiconductor pad region and another end segment of the at least one semiconductor nanowire is attached to a second semiconductor pad region. The first and second pad regions are located above and are in direct contact with a second portion of the bulk semiconductor substrate which is vertically offsets from the first portion. The structure further includes a gate surrounding a central portion of the at least one semiconductor nanowire, a source region located on a first side of the gate, and a drain region located on a second side of the gate which is opposite the first side of the gate.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: April 15, 2014
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Lauer, Shreesh Narasimha
  • Publication number: 20140084412
    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: September 26, 2012
    Publication date: March 27, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Renee T. Mo, Shreesh Narasimha
  • Patent number: 8680617
    Abstract: Disclosed is an SOI device on a bulk silicon layer which has an FET region, a body contact region and an STI region. The FET region is made of an SOI layer and an overlying gate. The STI region includes a first STI layer separating the SOI device from an adjacent SOI device. The body contact region includes an extension of the SOI layer, a second STI layer on the extension and a body contact in contact with the extension. The first and second STI layers are contiguous and of different thicknesses so as to form a split level STI.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: March 25, 2014
    Assignee: International Business Machines Corporation
    Inventors: Ying Li, Shreesh Narasimha, Werner A. Rausch
  • Patent number: 8674342
    Abstract: A method for forming a nanowire field effect transistor (FET) device, the method includes forming a suspended nanowire over a semiconductor substrate, forming a gate structure around a portion of the nanowire, forming a protective spacer adjacent to sidewalls of the gate and around portions of nanowire extending from the gate, removing exposed portions of the nanowire left unprotected by the spacer structure, and epitaxially growing a doped semiconductor material on exposed cross sections of the nanowire to form a source region and a drain region.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: March 18, 2014
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Lauer, Shreesh Narasimha
  • Publication number: 20140061819
    Abstract: A semiconductor device including a germanium containing substrate including a gate structure on a channel region of the semiconductor substrate. The gate structure may include a silicon oxide layer that is in direct contact with an upper surface of the germanium containing substrate, at least one high-k gate dielectric layer in direct contact with the silicon oxide layer, and at least one gate conductor in direct contact with the high-k gate dielectric layer. The interface between the silicon oxide layer and the upper surface of the germanium containing substrate is substantially free of germanium oxide. A source region and a drain region may be present on opposing sides of the channel region.
    Type: Application
    Filed: November 12, 2013
    Publication date: March 6, 2014
    Applicant: International Business Machines Corporation
    Inventors: MaryJane Brodsky, Murshed M. Chowdhury, Michael P. Chudzik, Min Dai, Siddarth A. Krishnan, Shreesh Narasimha, Shahab Siddiqui
  • Publication number: 20130328124
    Abstract: A semiconductor structure provided with a plurality of gated-diodes having a silicided anode (p-doped region) and cathode (n-doped region) and a high-K gate stack made of non-silicided gate material, the gated-diodes being adjacent to FETs, each of which having a silicided source, a silicided drain and a silicided HiK gate stack. The semiconductor structure eliminates a cap removal RIE in a gate first High-K metal gate flow from the region of the gated-diode. The lack of silicide and the presence of a nitride barrier on the gate of the diode are preferably made during the gate first process flow. The absence of the cap removal RIE is beneficial in that diffusions of the diode are not subjected to the cap removal RIE, which avoids damage and allows retaining its highly ideal junction characteristics.
    Type: Application
    Filed: June 6, 2012
    Publication date: December 12, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anthony I. Chou, Arvind Kumar, Edward P. Maciejewski, Shreesh Narasimha, Dustin K. Slisher
  • Patent number: 8592295
    Abstract: Non-planar semiconductor devices are provided that include at least one semiconductor nanowire suspended above a semiconductor oxide layer that is present on a first portion of a bulk semiconductor substrate. An end segment of the at least one semiconductor nanowire is attached to a first semiconductor pad region and another end segment of the at least one semiconductor nanowire is attached to a second semiconductor pad region. The first and second pad regions are located above and are in direct contact with a second portion of the bulk semiconductor substrate which is vertically offsets from the first portion. The structure further includes a gate surrounding a central portion of the at least one semiconductor nanowire, a source region located on a first side of the gate, and a drain region located on a second side of the gate which is opposite the first side of the gate.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: November 26, 2013
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Lauer, Shreesh Narasimha
  • Patent number: 8586966
    Abstract: A nanowire field effect transistor (FET) device includes a channel region including a silicon nanowire portion having a first distal end extending from the channel region and a second distal end extending from the channel region, the silicon portion is partially surrounded by a gate stack disposed circumferentially around the silicon portion, a source region including the first distal end of the silicon nanowire portion, a drain region including the second distal end of the silicon nanowire portion, a metallic layer disposed on the source region and the drain region, a first conductive member contacting the metallic layer of the source region, and a second conductive member contacting the metallic layer of the drain region.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: November 19, 2013
    Assignee: International Business Machines Corporation
    Inventors: Sarunya Bangsaruntip, Guy M. Cohen, Shreesh Narasimha, Jeffrey W. Sleight
  • Patent number: 8558313
    Abstract: An integrated circuit is provided that integrates an bulk FET and an SOI FET on the same chip, where the bulk FET includes a gate conductor over a gate oxide formed over a bulk substrate, where the gate dielectric of the bulk FET has the same thickness and is substantially coplanar with the buried insulating layer of the SOI FET. In a preferred embodiment, the bulk FET is formed from an SOI wafer by forming bulk contact trenches through the SOI layer and the buried insulating layer of the SOI wafer adjacent an active region of the SOI layer in a designated bulk device region. The active region of the SOI layer adjacent the bulk contact trenches forms the gate conductor of the bulk FET which overlies a portion of the underlying buried insulating layer, which forms the gate dielectric of the bulk FET.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: October 15, 2013
    Assignee: International Business Machines Corporation
    Inventors: Anthony I. Chou, Arvind Kumar, Shreesh Narasimha, Ning Su, Huiling Shang
  • Publication number: 20130264679
    Abstract: A semiconductor structure providing a precision resistive element and method of fabrication is disclosed. Polysilicon is embedded in a silicon substrate. The polysilicon may be doped to control the resistance. Embodiments may include resistors, eFuses, and silicon-on-insulator structures. Some embodiments may include non-rectangular cross sections.
    Type: Application
    Filed: April 5, 2012
    Publication date: October 10, 2013
    Applicant: International Business Machines Corporation
    Inventors: Arvind Kumar, Anthony I. Chou, Renee T. Mo, Shreesh Narasimha
  • Patent number: 8541295
    Abstract: A non-planar semiconductor device is provided including at least one semiconductor nanowire suspended above a semiconductor oxide layer present within a portion of a bulk semiconductor substrate. The semiconductor oxide layer has a topmost surface that is coplanar with a topmost surface of the bulk semiconductor substrate. A gate surrounds a portion of the at least one suspended semiconductor nanowire, a source region located on a first side of the gate, and a drain region located on a second side of the gate. The source region is in direct contact with an exposed end portion of the at least one suspended semiconductor nanowire, and the drain region is in direct contact with another exposed end portion of the at least one suspended semiconductor nanowire. The source and drain regions have an epitaxial relationship with the exposed end portions of the suspended semiconductor nanowire.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: September 24, 2013
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Laurer, Shreesh Narasimha
  • Patent number: 8536563
    Abstract: A method for forming a nanowire field effect transistor (FET) device including forming a first silicon on insulator (SOI) pad region, a second SOI pad region, a third SOI pad region, a first SOI portion connecting the first SOI pad region to the second SOI pad region, and a second SOI portion connecting the second SOI pad region to the third SOI pad region on a substrate, patterning a first hardmask layer over the second SOI portion, forming a first suspended nanowire over the semiconductor substrate, forming a first gate structure around a portion of the first suspended nanowire, patterning a second hardmask layer over the first gate structure and the first suspended nanowire, removing the first hardmask layer, forming a second suspended nanowire over the semiconductor substrate, forming a second gate structure around a portion of the second suspended nanowire, and removing the second hardmask layer.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 17, 2013
    Assignee: International Business Machines Corporation
    Inventors: Sarunya Bangsaruntip, Guy M. Cohen, Shreesh Narasimha, Jeffrey W. Sleight
  • Publication number: 20130221319
    Abstract: Non-planar semiconductor devices are provided that include at least one semiconductor nanowire suspended above a semiconductor oxide layer that is present on a first portion of a bulk semiconductor substrate. An end segment of the at least one semiconductor nanowire is attached to a first semiconductor pad region and another end segment of the at least one semiconductor nanowire is attached to a second semiconductor pad region. The first and second pad regions are located above and are in direct contact with a second portion of the bulk semiconductor substrate which is vertically offsets from the first portion. The structure further includes a gate surrounding a central portion of the at least one semiconductor nanowire, a source region located on a first side of the gate, and a drain region located on a second side of the gate which is opposite the first side of the gate.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 29, 2013
    Applicant: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Lauer, Shreesh Narasimha
  • Publication number: 20130221328
    Abstract: A method for forming a nanowire field effect transistor (FET) device, the method includes forming a suspended nanowire over a semiconductor substrate, forming a gate structure around a portion of the nanowire, forming a protective spacer adjacent to sidewalls of the gate and around portions of nanowire extending from the gate, removing exposed portions of the nanowire left unprotected by the spacer structure, and epitaxially growing a doped semiconductor material on exposed cross sections of the nanowire to form a source region and a drain region.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 29, 2013
    Applicant: International Business Machines Corporation
    Inventors: Jeffrey W. Sleight, Josephine B. Chang, Isaac Lauer, Shreesh Narasimha
  • Patent number: 8513068
    Abstract: A method for forming a nanowire field effect transistor (FET) device including forming a first silicon on insulator (SOI) pad region, a second SOI pad region, a third SOI pad region, a first SOI portion connecting the first SOI pad region to the second SOI pad region, and a second SOI portion connecting the second SOI pad region to the third SOI pad region on a substrate, patterning a first hardmask layer over the second SOI portion, forming a first suspended nanowire over the semiconductor substrate, forming a first gate structure around a portion of the first suspended nanowire, patterning a second hardmask layer over the first gate structure and the first suspended nanowire, removing the first hardmask layer, forming a second suspended nanowire over the semiconductor substrate, forming a second gate structure around a portion of the second suspended nanowire, and removing the second hardmask layer.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 20, 2013
    Assignee: International Business Machines Corporation
    Inventors: Sarunya Bangsaruntip, Guy M. Cohen, Shreesh Narasimha, Jeffrey W. Sleight
  • Patent number: 8490029
    Abstract: A method of fabricating a device using a sequence of annealing processes is provided. More particularly, a logic NFET device fabricated using a low temperature anneal to eliminate dislocation defects, method of fabricating the NFET device and design structure is shown and described. The method includes forming a stress liner over a gate structure and subjecting the gate structure and stress liner to a low temperature anneal process to form a stacking force in single crystalline silicon near the gate structure as a way to memorized the stress effort. The method further includes stripping the stress liner from the gate structure and performing an activation anneal at high temperature on device.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: July 16, 2013
    Assignee: International Business Machines Corporation
    Inventors: Anthony G. Domenicucci, Terence L. Kane, Shreesh Narasimha, Karen A. Nummy, Viorel Ontalus, Yun-Yu Wang
  • Publication number: 20130168776
    Abstract: A complementary metal oxide semiconductor (CMOS) device including a substrate including a first active region and a second active region, wherein each of the first active region and second active region of the substrate are separated by from one another by an isolation region. A n-type semiconductor device is present on the first active region of the substrate, in which the n-type semiconductor device includes a first portion of a gate structure. A p-type semiconductor device is present on the second active region of the substrate, in which the p-type semiconductor device includes a second portion of the gate structure. A connecting gate portion provides electrical connectivity between the first portion of the gate structure and the second portion of the gate structure. Electrical contact to the connecting gate portion is over the isolation region, and is not over the first active region and/or the second active region.
    Type: Application
    Filed: January 3, 2012
    Publication date: July 4, 2013
    Applicant: International Business Machines Corporation
    Inventors: Yue Liang, Dureseti Chidambarrao, Brian J. Greene, William K. Henson, Unoh Kwon, Shreesh Narasimha, Xiaojun Yu
  • Patent number: 8455334
    Abstract: A method for forming an integrated circuit, the method includes forming a first nanowire suspended above an insulator substrate, the first nanowire attached to a first silicon on insulator (SOI) pad region and a second SOI pad region that are disposed on the insulator substrate, a second nanowire disposed on the insulator substrate attached to a third SOI pad region and a fourth SOI pad region that are disposed on the insulator substrate, and a SOI slab region that is disposed on the insulator substrate, and forming a first gate surrounding a portion of the first nanowire, a second gate on a portion of the second nanowire, and a third gate on a portion of the SOI slab region.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: June 4, 2013
    Assignee: International Business Machines Corporation
    Inventors: Sarunya Bangsaruntip, Guy M. Cohen, Shreesh Narasimha, Jeffrey W. Sleight