Patents by Inventor Srikanth Ranganathan

Srikanth Ranganathan 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: 9613977
    Abstract: A method of manufacturing a semiconductor structure includes forming a stack of alternating layers comprising insulating layers and spacer material layers over a semiconductor substrate, forming a memory opening through the stack, forming an aluminum oxide layer having a horizontal portion at a bottom of the memory opening and a vertical portion at least over a sidewall of the memory opening, where the horizontal portion differs from the vertical portion by at least one of structure or composition, and selectively etching the horizontal portion selective to the vertical portion.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: April 4, 2017
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Rahul Sharangpani, Sateesh Koka, Raghuveer S. Makala, Srikanth Ranganathan, Mark Juanitas, Johann Alsmeier
  • Publication number: 20160379989
    Abstract: A method of manufacturing a semiconductor structure includes forming a stack of alternating layers comprising insulating layers and spacer material layers over a semiconductor substrate, forming a memory opening through the stack, forming an aluminum oxide layer having a horizontal portion at a bottom of the memory opening and a vertical portion at least over a sidewall of the memory opening, where the horizontal portion differs from the vertical portion by at least one of structure or composition, and selectively etching the horizontal portion selective to the vertical portion.
    Type: Application
    Filed: June 24, 2015
    Publication date: December 29, 2016
    Inventors: Rahul SHARANGPANI, Sateesh KOKA, Raghuveer S. MAKALA, Srikanth RANGANATHAN, Mark JUANITAS, Johann ALSMEIER
  • Patent number: 8981452
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing also are provided.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: March 17, 2015
    Assignee: SanDisk Corporation
    Inventors: Jian Chen, Xiangfeng Duan, Chao Liu, Madhuri Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Publication number: 20140272576
    Abstract: An electrode is provided for an electrochemical lithium battery cell. The electrode includes a bulk material that has a plurality of voids dispersed substantially throughout the bulk material. The bulk material is silicon. Numerous other aspects are provided.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: SANDISK 3D LLC
    Inventors: Priyanka Kamat, Rene Hartner, Yitzhak Gilboa, Kang-Jay Hsia, Srikanth Ranganathan, Xiaofeng Liang
  • Patent number: 8763363
    Abstract: A method of assembling a turbine engine is provided. The method includes providing a heat exchanger having a curvilinear body. The method also includes coupling the heat exchanger to at least one of a fan casing and an engine casing of the turbine engine. The curvilinear body facilitates reducing pressure losses in airflow channeled into the heat exchanger.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: July 1, 2014
    Assignee: General Electric Company
    Inventor: Srikanth Ranganathan
  • Publication number: 20140035011
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing also are provided.
    Type: Application
    Filed: September 20, 2013
    Publication date: February 6, 2014
    Applicant: SANDISK CORPORATION
    Inventors: Jian Chen, Xiangfeng Duan, Chao Liu, Madhuri Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Patent number: 8558304
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing are also provided.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: October 15, 2013
    Assignee: SanDisk Corporation
    Inventors: Jian Chen, Xiangfeng Duan, Chao Liu, Madhuri Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Patent number: 8202510
    Abstract: The invention provides a method for diagnosing amyotrophic lateral sclerosis (ALS) in a subject, a method for assessing the effectiveness of a drug in treating ALS, and a method for determining the site of onset of ALS in a subject. Each method comprises (a) obtaining a sample from the subject, (b) analyzing the proteins in the sample by mass spectroscopy, and (c) determining a mass spectral profile for the sample. In some embodiments, the method comprises comparing the mass spectral profile of the sample to the mass spectral profile of a positive or a negative standard.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: June 19, 2012
    Assignee: University of Pittsburgh—Of The Commonwealth System Of Higher Education
    Inventors: Robert P. Bowser, Srikanth Ranganathan
  • Publication number: 20110251295
    Abstract: Methods for producing electronic grade metal nanostructures having low levels of contaminants are provided. Monolayer arrays, populations, and devices including such electronic grade nanostructures are described. In addition, novel methods and compositions for production of Group 10 metal nanostructures and for production of ruthenium nanostructures are provided, along with methods for recovering nanostructures from suspension.
    Type: Application
    Filed: May 27, 2011
    Publication date: October 13, 2011
    Applicant: NANOSYS, INC.
    Inventors: Srikanth Ranganathan, Paul Bernatis, Joel Gamoras, Chao Liu, J. Wallace Parce
  • Publication number: 20110204432
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing are also provided.
    Type: Application
    Filed: April 29, 2011
    Publication date: August 25, 2011
    Applicant: NANOSYS, INC.
    Inventors: Jian Chen, Xiangfeng Duan, Chao Liu, Madhuri L. Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Patent number: 7976646
    Abstract: Methods for producing electronic grade metal nanostructures having low levels of contaminants are provided. Monolayer arrays, populations, and devices including such electronic grade nanostructures are described. In addition, novel methods and compositions for production of Group 10 metal nanostructures and for production of ruthenium nanostructures are provided, along with methods for recovering nanostructures from suspension.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: July 12, 2011
    Assignee: Nanosys, Inc.
    Inventors: Srikanth Ranganathan, Paul Bernatis, Joel Gamoras, Chao Liu, J. Wallace Parce
  • Patent number: 7968273
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing are also provided.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: June 28, 2011
    Assignee: Nanosys, Inc.
    Inventors: Jian Chen, Xiangfeng Duan, Chao Liu, Madhuri L. Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Publication number: 20110150695
    Abstract: Methods for producing electronic grade metal nanostructures having low levels of contaminants are provided. Monolayer arrays, populations, and devices including such electronic grade nanostructures are described. In addition, novel methods and compositions for production of Group 10 metal nanostructures and for production of ruthenium nanostructures are provided, along with methods for recovering nanostructures from suspension.
    Type: Application
    Filed: August 18, 2006
    Publication date: June 23, 2011
    Applicant: NANOSYS, Inc.
    Inventors: Srikanth Ranganathan, Paul Bernatis, Joel Gamoras, Chao Liu, J. Wallace Parce
  • Publication number: 20110104739
    Abstract: The invention provides a method for diagnosing amyotrophic lateral sclerosis (ALS) in a subject, a method for assessing the effectiveness of a drug in treating ALS, and a method for determining the site of onset of ALS in a subject. Each method comprises (a) obtaining a sample from the subject, (b) analyzing the proteins in the sample by mass spectroscopy, and (c) determining a mass spectral profile for the sample. In some embodiments, the method comprises comparing the mass spectral profile of the sample to the mass spectral profile of a positive or a negative standard.
    Type: Application
    Filed: December 1, 2010
    Publication date: May 5, 2011
    Inventors: Robert P. Bowser, Srikanth Ranganathan
  • Patent number: 7858071
    Abstract: The invention provides a method for diagnosing amyotrophic lateral sclerosis (ALS) in a subject, a method for assessing the effectiveness of a drug in treating ALS, and a method for determining the site of onset of ALS in a subject. Each method comprises (a) obtaining a sample from the subject, (b) analyzing the proteins in the sample by mass spectroscopy, and (c) determining a mass spectral profile for the sample. In some embodiments, the method comprises comparing the mass spectral profile of the sample to the mass spectral profile of a positive or a negative standard.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: December 28, 2010
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Robert P. Bowser, Srikanth Ranganathan
  • Publication number: 20100155786
    Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing are also provided.
    Type: Application
    Filed: July 27, 2007
    Publication date: June 24, 2010
    Applicant: NANOSYS, Inc.
    Inventors: David L. Heald, Jian Chen, Karen Chu Cruden, Xiangfeng Duan, Chao Liu, Madhuri L. Nallabolu, J. Wallace Parce, Srikanth Ranganathan
  • Publication number: 20090007570
    Abstract: A method of assembling a turbine engine is provided. The method includes providing a heat exchanger having a curvilinear body. The method also includes coupling the heat exchanger to at least one of a fan casing and an engine casing of the turbine engine. The curvilinear body facilitates reducing pressure losses in airflow channeled into the heat exchanger.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 8, 2009
    Inventor: Srikanth Ranganathan
  • Publication number: 20080150004
    Abstract: Methods and apparatuses for electronic devices such as non-volatile memory devices are described. The memory devices include a multi-layer control dielectric, such as a double or triple layer. The multi-layer control dielectric includes a combination of high-k dielectric materials such as aluminum oxide (Al2O3), hafnium oxide (HfO2), and/or hybrid films of hafnium aluminum oxide. The multi-layer control dielectric provides enhanced characteristics, including increased charge retention, enhanced memory program/erase window, improved reliability and stability, with feasibility for single or multistate (e.g., two, three or four bit) operation.
    Type: Application
    Filed: March 19, 2007
    Publication date: June 26, 2008
    Applicant: NANOSYS, INC.
    Inventors: Jian Chen, Xiangfeng Duan, Karen Cruden, Chao Liu, Madhuri L. Nallabolu, Srikanth Ranganathan, Francisco Leon, J. Wallace Parce
  • Publication number: 20080150003
    Abstract: Methods and apparatuses for electronic devices such as non-volatile memory devices are described. The memory devices include a multi-layer control dielectric, such as a double or triple layer. The multi-layer control dielectric includes a combination of high-k dielectric materials such as aluminum oxide (Al2O3), hafnium oxide (HfO2), and/or hybrid films of hafnium aluminum oxide. The multi-layer control dielectric provides enhanced characteristics, including increased charge retention, enhanced memory program/erase window, improved reliability and stability, with feasibility for single or multistate (e.g., two, three or four bit) operation.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Inventors: Jian Chen, Xiangfeng Duan, Karen Cruden, Chao Liu, Madhuri L. Nallabolu, Srikanth Ranganathan, Francisco Leon, J. Wallace Parce
  • Publication number: 20060230840
    Abstract: A system for modeling fluid flow in a valve (10) includes a section for modeling a main fluid flow domain having an inlet (25), a first outlet (26) and a second outlet using a first grid size, a section for modeling a leakage fluid flow domain (38) having an inlet that includes the main fluid flow domain second outlet and a leakage fluid flow outlet using a second grid size, and a section for iteratively calculating fluid flow in the main fluid flow domain based on leakage flow as determined by the section for modeling leakage fluid flow. Also a method for modeling fluid flow in a valve.
    Type: Application
    Filed: October 3, 2005
    Publication date: October 19, 2006
    Inventor: Srikanth Ranganathan