Patents by Inventor Sanjay Mehta

Sanjay Mehta 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: 8679941
    Abstract: A method of forming a semiconductor device is provided where in one embodiment an STI fill is recessed below the pad nitride and pad oxide layers, to a level substantially coplanar with the top surface of the substrate. A thin (having a thickness in the range of about 10 ?-100 ?) wet etch resistant layer is formed in contact with and completely covering at least the top surface of the recessed STI fill material. The thin wet etch resistant layer is more resistant to a wet etch process than at least the pad oxide layer. The thin wet etch resistant layer may be a refractory dielectric material, or a dielectric such as HfOx, AlyOx, ZrOx, HfZrOx, and HfSiOx. The inventive wet etch resistant layer improves the wet etch budget of subsequent wet etch processing steps.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: March 25, 2014
    Assignee: International Business Machines Corporation
    Inventors: Jason E Cummings, Lisa F Edge, Balasubramanian S. Haran, David V Horak, Hemanth Jagannathan, Sanjay Mehta
  • Patent number: 8652950
    Abstract: A carbon-rich carbon boron nitride dielectric film having a dielectric constant of equal to, or less than 3.6 is provided that can be used as a component in various electronic devices. The carbon-rich carbon boron nitride dielectric film has a formula of CxByNz wherein x is 35 atomic percent or greater, y is from 6 atomic percent to 32 atomic percent and z is from 8 atomic percent to 33 atomic percent.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: February 18, 2014
    Assignee: International Business Machines Corporation
    Inventors: Son Van Nguyen, Alfred Grill, Thomas J. Haigh, Jr., Sanjay Mehta
  • Publication number: 20140024198
    Abstract: A method for fin field effect transistor (finFET) device formation includes forming a plurality of fins on a substrate; forming a gate region over the plurality of fins; and forming isolation areas for the finFET device after formation of the gate region, wherein forming the isolation areas for the finFET device comprises performing one of oxidation or removal of a subset of the plurality of fins.
    Type: Application
    Filed: July 18, 2012
    Publication date: January 23, 2014
    Applicant: International Business Machines Corporation
    Inventors: Balasubramanian S. Haran, Sanjay Mehta, Theodorus E. Standaert
  • Patent number: 8617961
    Abstract: A method for fin field effect transistor (finFET) device formation includes forming a plurality of fins on a substrate; forming a gate region over the plurality of fins; and forming isolation areas for the finFET device after formation of the gate region, wherein forming the isolation areas for the finFET device comprises performing one of oxidation or removal of a subset of the plurality of fins.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: December 31, 2013
    Assignee: International Business Machines Corporation
    Inventors: Balasubramanian S. Haran, Sanjay Mehta, Theodorus E. Standaert
  • Patent number: 8614486
    Abstract: A gate dielectric is patterned after formation of a first gate spacer by anisotropic etch of a conformal dielectric layer to minimize overetching into a semiconductor layer. In one embodiment, selective epitaxy is performed to sequentially form raised epitaxial semiconductor portions, a disposable gate spacer, and raised source and drain regions. The disposable gate spacer is removed and ion implantation is performed into exposed portions of the raised epitaxial semiconductor portions to form source and drain extension regions. In another embodiment, ion implantation for source and drain extension formation is performed through the conformal dielectric layer prior to an anisotropic etch that forms the first gate spacer. The presence of the raised epitaxial semiconductor portions or the conformation dielectric layer prevents complete amorphization of the semiconductor material in the source and drain extension regions, thereby enabling regrowth of crystalline source and drain extension regions.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: December 24, 2013
    Assignee: International Business Machines Corporation
    Inventors: Balasubramanian S. Haran, Hemanth Jagannathan, Sivananda K. Kanakasabapathy, Sanjay Mehta
  • Publication number: 20130292746
    Abstract: After formation of a silicon nitride gate spacer and a silicon nitride liner overlying a disposable gate structure, a dielectric material layer is deposited, which includes a dielectric material that is not prone to material loss during subsequent exposure to wet or dry etch chemicals employed to remove disposable gate materials in the disposable gate structure. The dielectric material can be a spin-on dielectric material or can be a dielectric metal oxide material. The dielectric material layer and the silicon nitride liner are planarized to provide a planarized dielectric surface in which the disposable gate materials are physically exposed. Surfaces of the planarized dielectric layer is not recessed relative to surfaces of the silicon nitride layer during removal of the disposable gate materials and prior to formation of replacement gate structures, thereby preventing formation of metallic stringers.
    Type: Application
    Filed: September 7, 2012
    Publication date: November 7, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hemanth Jagannathan, Sanjay Mehta
  • Publication number: 20130264842
    Abstract: A method of manufacturing a vehicle frame, includes: forming compatible threads on a first rail composed of a first material and a second rail composed of a second material; forming a pair of locators on the first and second rails, said locators configured to indicate an alignment condition of the first rail and second rail when screwed together; and screwing together the first rail and second rail.
    Type: Application
    Filed: January 25, 2013
    Publication date: October 10, 2013
    Inventors: David Anthony Wagner, Michael M. Azzouz, Eric William Barrett, Xiaoming Chen, John Martin Knittel, Sanjay Mehta, John Joseph Uicker, Jeff A. Wallace
  • Publication number: 20130264641
    Abstract: A thin BOX ETSOI device with robust isolation and method of manufacturing. The method includes providing a wafer with at least a pad layer overlying a first semiconductor layer overlying an oxide layer overlying a second semiconductor layer, wherein the first semiconductor layer has a thickness of 10 nm or less. The process continues with etching a shallow trench into the wafer, extending partially into the second semiconductor layer and forming first spacers on the sidewalls of said shallow trench. After spacer formation, the process continues by etching an area directly below and between the first spacers, exposing the underside of the first spacers, forming second spacers covering all exposed portions of the first spacers, wherein the pad oxide layer is removed, and forming a gate structure over the first semiconductor wafer.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 10, 2013
    Applicant: International Business Machines Corporation
    Inventors: Kangguo Cheng, Bruce B. Doris, Balasubramanian S. Haran, Sanjay Mehta, Stefan Schmitz
  • Patent number: 8551872
    Abstract: A transistor structure includes a channel located in an extremely thin silicon on insulator (ETSOI) layer and disposed between a raised source and a raised drain, a gate structure having a gate conductor disposed over the channel and between the source and the drain, and a gate spacer layer disposed over the gate conductor. The raised source and the raised drain each have a facet that is upwardly sloping away from the gate structure. A lower portion of the source and a lower portion of the drain are separated from the channel by an extension region containing a dopant species diffused from a dopant-containing glass.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: October 8, 2013
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Chen, Bruce B. Doris, Balasubramanian S. Haran, Amlan Majumdar, Sanjay Mehta
  • Patent number: 8535999
    Abstract: Semiconductor substrate with a deformed gate region and a method for the fabrication thereof. The semiconductor substrate has improved device performance compared to devices without a deformed gate region and decreased dopant loss compared to devices with deformed source/drain regions.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: September 17, 2013
    Assignee: International Business Machines Corporation
    Inventors: Lahir Adam, Bruce B. Doris, Sanjay Mehta, Zhengmao Zhu
  • Publication number: 20130229005
    Abstract: A method of manufacturing a vehicle cross-member assembly includes: adding adhesive to an adhesive reservoir in an interconnecting member composed of a first material; overlapping a first rail composed of a second material with the interconnecting member; and welding the interconnecting member to a second rail in a position perpendicular with respect to the second rail. The second rail is composed of a different material than the first rail.
    Type: Application
    Filed: November 20, 2012
    Publication date: September 5, 2013
    Inventors: John Martin Knittel, Xiaoming Chen, Sanjay Mehta, Michael M. Azzouz, Eric William Barrett, Mark Wlotkowski
  • Publication number: 20130221413
    Abstract: After formation of a silicon nitride gate spacer and a silicon nitride liner overlying a disposable gate structure, a dielectric material layer is deposited, which includes a dielectric material that is not prone to material loss during subsequent exposure to wet or dry etch chemicals employed to remove disposable gate materials in the disposable gate structure. The dielectric material can be a spin-on dielectric material or can be a dielectric metal oxide material. The dielectric material layer and the silicon nitride liner are planarized to provide a planarized dielectric surface in which the disposable gate materials are physically exposed. Surfaces of the planarized dielectric layer is not recessed relative to surfaces of the silicon nitride layer during removal of the disposable gate materials and prior to formation of replacement gate structures, thereby preventing formation of metallic stringers.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 29, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hemanth Jagannathan, Sanjay Mehta
  • Patent number: 8486778
    Abstract: A gate dielectric is patterned after formation of a first gate spacer by anisotropic etch of a conformal dielectric layer to minimize overetching into a semiconductor layer. In one embodiment, selective epitaxy is performed to sequentially form raised epitaxial semiconductor portions, a disposable gate spacer, and raised source and drain regions. The disposable gate spacer is removed and ion implantation is performed into exposed portions of the raised epitaxial semiconductor portions to form source and drain extension regions. In another embodiment, ion implantation for source and drain extension formation is performed through the conformal dielectric layer prior to an anisotropic etch that forms the first gate spacer. The presence of the raised epitaxial semiconductor portions or the conformation dielectric layer prevents complete amorphization of the semiconductor material in the source and drain extension regions, thereby enabling regrowth of crystalline source and drain extension regions.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: July 16, 2013
    Assignee: International Business Machines Corporation
    Inventors: Balasubramanian S. Haran, Hemanth Jagannathan, Sivananda K. Kanakasabapathy, Sanjay Mehta
  • Publication number: 20130175625
    Abstract: A transistor structure includes a channel located in an extremely thin silicon on insulator (ETSOI) layer and disposed between a raised source and a raised drain, a gate structure having a gate conductor disposed over the channel and between the source and the drain, and a gate spacer layer disposed over the gate conductor. The raised source and the raised drain each have a facet that is upwardly sloping away from the gate structure. A lower portion of the source and a lower portion of the drain are separated from the channel by an extension region containing a dopant species diffused from a dopant-containing glass.
    Type: Application
    Filed: September 19, 2012
    Publication date: July 11, 2013
    Applicant: International Business Machines Corporation
    Inventors: Kangguo Cheng, Bruce B. Doris, Balasubramanian S. Haran, Amlan Majumdar, Sanjay Mehta
  • Patent number: 8476743
    Abstract: A carbon-rich carbon boron nitride dielectric film having a dielectric constant of equal to, or less than 3.6 is provided that can be used as a component in various electronic devices. The carbon-rich carbon boron nitride dielectric film has a formula of CxByNz wherein x is 35 atomic percent or greater, y is from 6 atomic percent to 32 atomic percent and z is from 8 atomic percent to 33 atomic percent.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: July 2, 2013
    Assignee: International Business Machines Corporation
    Inventors: Son Van Nguyen, Alfred Grill, Thomas J. Haigh, Jr., Sanjay Mehta
  • Patent number: 8442950
    Abstract: Multi-dimensional surrogation systems and methods are provided that generate at least one data surrogate using information of data and numerous data changes received from at least one data source. The multi-dimensional surrogation transforms data of each data surrogate from a format of the data source to at least one alternative format. Original metadata is extracted from each data surrogate. New metadata is generated by combining portions of the original metadata and components of each data surrogate. The multi-dimensional surrogation generates an extended data surrogate comprising the data surrogate and the new metadata.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: May 14, 2013
    Assignee: Mimosa Systems, Inc.
    Inventors: Roy P. D'Souza, Sanjay Mehta, Bhushan Pandit, Thirumalai Muppur Ravi
  • Patent number: 8440552
    Abstract: A method includes providing an ETSOI wafer having a semiconductor layer having a top surface with at least one gate structure having on sidewalls thereof a layer of dielectric material. A portion of the layer of dielectric material extends away from the gate structure on the surface of the semiconductor layer. The method further includes faulting a raised S/D on the semiconductor layer adjacent to the portion of the layer of dielectric material, removing the portion of the layer of dielectric material to expose an underlying portion of the surface of the semiconductor layer and applying a layer of glass containing a dopant to cover at least the exposed portion of the surface of the semiconductor layer. The method further includes diffusing the dopant through the exposed portion of the surface of the semiconductor layer to form a source extension region and a drain extension region.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: May 14, 2013
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Chen, Bruce B. Doris, Balasubramanian S. Haran, Amlan Majumdar, Sanjay Mehta
  • Publication number: 20130062753
    Abstract: A carbon-rich carbon boron nitride dielectric film having a dielectric constant of equal to, or less than 3.6 is provided that can be used as a component in various electronic devices. The carbon-rich carbon boron nitride dielectric film has a formula of CxByNz wherein x is 35 atomic percent or greater, y is from 6 atomic percent to 32 atomic percent and z is from 8 atomic percent to 33 atomic percent.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 14, 2013
    Applicant: International Business Machines Corporation
    Inventors: Son Van Nguyen, Alfred Grill, Thomas J. Haigh, JR., Sanjay Mehta
  • Patent number: 8394684
    Abstract: Techniques are discloses to apply an external stress onto the source/drain semiconductor fin sidewall areas and latch the same onto the semiconductor fin before releasing the sidewalls for subsequent salicidation and contact formation. In particular, the present disclosure provides methods in which selected portions of a semiconductor are subjected to an amorphizing ion implantation which disorients the crystal structure of the selected portions of the semiconductor fins, relative to portions of the semiconductor fin that is beneath a gate stack and encapsulated with various liners. At least one stress liner is formed and then stress memorization occurs by performing a stress latching annealing. During this anneal, recrystallization of the disoriented crystal structure occurs. The at least one stress liner is removed and thereafter merging of the semiconductor fins in the source/drain regions is performed.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: March 12, 2013
    Assignee: International Business Machines Corporation
    Inventors: Sivananda K. Kanakasabapathy, Hemanth Jagannathan, Sanjay Mehta
  • Publication number: 20130032945
    Abstract: An interconnect structure and methods for making the same include sidewall portions of an interlevel dielectric layer. The sidewall portions have a width less than a minimum feature size for a given lithographic technology and the width is formed by a thickness of the interlevel dielectric layer when conformally formed on vertical surfaces of a mandrel. The sidewall portions form spaced-apart openings. Conductive structures fill the spaced-apart openings and are separated by the sidewall portions to form single damascene structures.
    Type: Application
    Filed: August 3, 2011
    Publication date: February 7, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qinghuang Lin, Sanjay Mehta, Hosadurga Shobha