Patents by Inventor Uma Srinivasan

Uma Srinivasan 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: 20170155743
    Abstract: Embodiments of the invention are directed to systems and methods for common request processing by a request formatting platform. The request formatting platform generates formatted requests for request processors according to specifications of a common request processing application programming interface (API). The same common request processing API is used by the request formatting platform to communicate with all of the request processors according to one particular format.
    Type: Application
    Filed: November 18, 2016
    Publication date: June 1, 2017
    Inventors: Rohit Sukhija, Man Grace Wu, Jan Tore Klepp, Rajiv Dutta, Ghanshyam Rokde, Soorej Nair, Uma Srinivasan, Nathan Morgan, Sanjib Sengupta, Palaniappan Kathiresan
  • Patent number: 9529645
    Abstract: Example methods and apparatus to manage object locks are disclosed. A disclosed example method includes intercepting a processor request to apply the lock on the object, identifying a performance history of the object based on a number of instances of contention, reducing computing resources of the processor by, when the number of instances is below a threshold value, generating a lock bypass for the object to cause speculative execution of target code within the object, and preventing speculative execution by applying the lock on the object when the number of instances is above the threshold value.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: December 27, 2016
    Assignee: Intel Corporation
    Inventors: Suresh Srinivas, Stephen H. Dohrmann, Mingqiu Sun, Uma Srinivasan, Ravi Rajwar, Konrad K. Lai
  • Patent number: 9378957
    Abstract: The use of doped silicon nanoparticle inks and other liquid dopant sources can provide suitable dopant sources for driving dopant elements into a crystalline silicon substrate using a thermal process if a suitable cap is provided. Suitable caps include, for example, a capping slab, a cover that may or may not rest on the surface of the substrate and a cover layer. Desirable dopant profiled can be achieved. The doped nanoparticles can be delivered using a silicon ink. The residual silicon ink can be removed after the dopant drive-in or at least partially densified into a silicon material that is incorporated into the product device. The silicon doping is suitable for the introduction of dopants into crystalline silicon for the formation of solar cells.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: June 28, 2016
    Assignee: NanoGram Corporation
    Inventors: Guojun Liu, Uma Srinivasan, Shivkumar Chiruvolu
  • Publication number: 20150191616
    Abstract: Laser pyrolysis reactor designs and corresponding reactant inlet nozzles are described to provide desirable particle quenching that is particularly suitable for the synthesis of elemental silicon particles. In particular, the nozzles can have a design to encourage nucleation and quenching with inert gas based on a significant flow of inert gas surrounding the reactant precursor flow and with a large inert entrainment flow effectively surrounding the reactant precursor and quench gas flows. Improved silicon nanoparticle inks are described that has silicon nanoparticles without any surface modification with organic compounds. The silicon ink properties can be engineered for particular printing applications, such as inkjet printing, gravure printing or screen printing. Appropriate processing methods are described to provide flexibility for ink designs without surface modifying the silicon nanoparticles.
    Type: Application
    Filed: March 20, 2015
    Publication date: July 9, 2015
    Inventors: Shivkumar Chiruvolu, Igor Altman, Bernard M. Frey, Weidong Li, Guojun Liu, Robert B. Lynch, Gina Elizabeth Pengra-Leung, Uma Srinivasan
  • Publication number: 20150169384
    Abstract: Example methods and apparatus to manage object locks are disclosed. A disclosed example method includes intercepting a processor request to apply the lock on the object, identifying a performance history of the object based on a number of instances of contention, reducing computing resources of the processor by, when the number of instances is below a threshold value, generating a lock bypass for the object to cause speculative execution of target code within the object, and preventing speculative execution by applying the lock on the object when the number of instances is above the threshold value.
    Type: Application
    Filed: March 2, 2015
    Publication date: June 18, 2015
    Inventors: Suresh Srinivas, Stephen H. Dohrmann, Mingqiu Sun, Uma Srinivasan, Ravi Rajwar, Konrad K. Lai
  • Patent number: 9006720
    Abstract: Laser pyrolysis reactor designs and corresponding reactant inlet nozzles are described to provide desirable particle quenching that is particularly suitable for the synthesis of elemental silicon particles. In particular, the nozzles can have a design to encourage nucleation and quenching with inert gas based on a significant flow of inert gas surrounding the reactant precursor flow and with a large inert entrainment flow effectively surrounding the reactant precursor and quench gas flows. Improved silicon nanoparticle inks are described that has silicon nanoparticles without any surface modification with organic compounds. The silicon ink properties can be engineered for particular printing applications, such as inkjet printing, gravure printing or screen printing. Appropriate processing methods are described to provide flexibility for ink designs without surface modifying the silicon nanoparticles.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: April 14, 2015
    Assignee: NanoGram Corporation
    Inventors: Shivkumar Chiruvolu, Igor Altman, Bernard M. Frey, Weidong Li, Guojun Liu, Robert B. Lynch, Gina Elizabeth Pengra-Leung, Uma Srinivasan
  • Patent number: 8968985
    Abstract: The presently described embodiments use a printing process, e.g. a wax printing technique, to pattern a mask layer (such as a soldermask layer) of, for example, a printed circuit. Substantially all other conventional processes in developing soldermask and exposure processes can be maintained. According to the presently described embodiments, each printed circuit will have a unique pattern that matches uniform and non-uniform runout. In one form, the pattern is comprised of wax single drops having a specified gap to make the process transparent to the current industry practice. Furthermore, the single drops can be used for both large and small areas without any development time differences. In at least one form, the wax pattern and the soldermask in the gap are removed during development.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: March 3, 2015
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Scott Jong Ho Limb, Eric J. Shrader, Uma Srinivasan
  • Patent number: 8972994
    Abstract: Example methods and apparatus to manage object locks are disclosed. A disclosed example method includes receiving an object lock request from a processor, the lock request associated with object lock code to lock an object, and generating object lock-bypass code based on a type of the processor, the object lock-bypass code to execute in a managed runtime in response to receiving the object lock request. The example method also includes identifying a type of instruction set architecture (ISA) associated with the processor, invoking a checkpoint instruction for the processor based on the identified ISA, suspending the object lock code from executing and executing target code when the object is uncontended, and allowing the object lock code to execute when the object is contended.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 3, 2015
    Assignee: Intel Corporation
    Inventors: Suresh Srinivas, Stephen H. Dohrmann, Mingqiu Sun, Uma Srinivasan, Ravi Rajwar, Konrad K. Lai
  • Patent number: 8912083
    Abstract: The use of doped silicon nanoparticle inks and other liquid dopant sources can provide suitable dopant sources for driving dopant elements into a crystalline silicon substrate using a thermal process if a suitable cap is provided. Suitable caps include, for example, a capping slab, a cover that may or may not rest on the surface of the substrate and a cover layer. Desirable dopant profiled can be achieved. The doped nanoparticles can be delivered using a silicon ink. The residual silicon ink can be removed after the dopant drive-in or at least partially densified into a silicon material that is incorporated into the product device. The silicon doping is suitable for the introduction of dopants into crystalline silicon for the formation of solar cells.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: December 16, 2014
    Assignee: NanoGram Corporation
    Inventors: Guojun Liu, Uma Srinivasan, Shivkumar Chiruvolu
  • Patent number: 8895962
    Abstract: Laser pyrolysis reactor designs and corresponding reactant inlet nozzles are described to provide desirable particle quenching that is particularly suitable for the synthesis of elemental silicon particles. In particular, the nozzles can have a design to encourage nucleation and quenching with inert gas based on a significant flow of inert gas surrounding the reactant precursor flow and with a large inert entrainment flow effectively surrounding the reactant precursor and quench gas flows. Improved silicon nanoparticle inks are described that has silicon nanoparticles without any surface modification with organic compounds. The silicon ink properties can be engineered for particular printing applications, such as inkjet printing, gravure printing or screen printing. Appropriate processing methods are described to provide flexibility for ink designs without surface modifying the silicon nanoparticles.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: November 25, 2014
    Assignee: NanoGram Corporation
    Inventors: Shivkumar Chiruvolu, Igor Altman, Bernard M. Frey, Weidong Li, Guojun Liu, Robert B. Lynch, Gina Elizabeth Pengra-Leung, Uma Srinivasan
  • Patent number: 8765226
    Abstract: A patterned layer over a wafer is produced by depositing a print-patterned mask structure. Energized particles of a target material are deposited over the wafer and the print-patterned mask such that particles of said target material incident on the mask structure enter the mask structure body and minimally accumulate, if at all, on the surface of the mask structure, and otherwise the particles of target material accumulate as a generally uniform layer over the wafer. The print-patterned mask structure, including particles of target material therein, is removed leaving the generally uniform layer of target material as a patterned layer over the wafer.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: July 1, 2014
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Scott Limb, Uma Srinivasan
  • Publication number: 20140179049
    Abstract: Silicon based nanoparticle inks are described with very low metal contamination levels. In particular, metal contamination levels can be established in the parts-per-billion range. The inks of particular interest generally comprise a polymer to influence the ink rheology. Techniques are described that are suitable for purifying polymers soluble in polar solvents, such as alcohols, with respect metal contamination. Very low levels of metal contamination for cellulose polymers are described.
    Type: Application
    Filed: November 22, 2013
    Publication date: June 26, 2014
    Inventors: Ha Thi-Hoang Nguyen, Masaya Soeda, Weidong Li, Uma Srinivasan
  • Publication number: 20140162445
    Abstract: The use of doped silicon nanoparticle inks and other liquid dopant sources can provide suitable dopant sources for driving dopant elements into a crystalline silicon substrate using a thermal process if a suitable cap is provided. Suitable caps include, for example, a capping slab, a cover that may or may not rest on the surface of the substrate and a cover layer. Desirable dopant profiled can be achieved. The doped nanoparticles can be delivered using a silicon ink. The residual silicon ink can be removed after the dopant drive-in or at least partially densified into a silicon material that is incorporated into the product device. The silicon doping is suitable for the introduction of dopants into crystalline silicon for the formation of solar cells.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicant: NanoGram Corporation
    Inventors: Guojun Liu, Uma Srinivasan, Shivkumar Chiruvolu
  • Publication number: 20140151706
    Abstract: Silicon nanoparticle inks provide a basis for the formation of desirable materials. Specifically, composites have been formed in thin layers comprising silicon nanoparticles embedded in an amorphous silicon matrix, which can be formed at relatively low temperatures. The composite material can be heated to form a nanocrystalline material having crystals that are non-rod shaped. The nanocrystalline material can have desirable electrical conductive properties, and the materials can be formed with a high dopant level. Also, nanocrystalline silicon pellets can be formed from silicon nanoparticles deposited form an ink in which the pellets can be relatively dense although less dense than bulk silicon. The pellets can be formed from the application of pressure and heat to a silicon nanoparticle layer.
    Type: Application
    Filed: February 7, 2014
    Publication date: June 5, 2014
    Applicant: NanoGram Corporation
    Inventors: Guojun Liu, Shivkumar Chiruvolu, Weidong Li, Uma Srinivasan
  • Publication number: 20140106551
    Abstract: Laser based processes are used alone or in combination to effectively process doped domains for semiconductors and/or current harvesting structures. For example, dopants can be driven into a silicon/germanium semiconductor layer from a bare silicon/germanium surface using a laser beam. Deep contacts have been found to be effective for producing efficient solar cells. Dielectric layers can be effectively patterned to provide for selected contact between the current collectors and the doped domains along the semiconductor surface. Rapid processing approaches are suitable for efficient production processes.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Applicant: NanoGram Corporation
    Inventors: Uma Srinivasan, Xin Zhou, Henry Hieslmair, Neeraj Pakala
  • Patent number: 8551556
    Abstract: High aspect ratio structures can be obtained by print-patterning masking features in feature stacks such that each feature has a lateral edge which is aligned in a plane roughly perpendicular to the plane of the substrate on which the features are formed. Due to the differential lateral spreading between features formed on a substrate and formed atop other features, the print head is indexed less than the radius of a droplet to a position where a droplet ejected by the print head forms an upper feature atop a lower feature such that the lateral edges of the upper and lower features are aligned in the plane roughly perpendicular to the plane of the substrate. Feature stacks of two or more features may provide a vertical (or re-entrant) sidewall mask for formation of high aspect ratio structures, by e.g., electroplating, etc.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: October 8, 2013
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Eric Shrader, Uma Srinivasan, Clark Crawford, Scott Limb
  • Publication number: 20130189831
    Abstract: Improved silicon/germanium nanoparticle inks are described that have silicon/germanium nanoparticles well distributed within a stable dispersion. In particular the inks are formulated with a centrifugation step to remove contaminants as well as less well dispersed portions of the dispersion. A sonication step can be used after the centrifugation, which is observed to result in a synergistic improvement to the quality of some of the inks. The silicon/germanium ink properties can be engineered for particular deposition applications, such as spin coating or screen printing. Appropriate processing methods are described to provide flexibility for ink designs without surface modifying the silicon/germanium nanoparticles. The silicon/germanium nanoparticles are well suited for forming semiconductor components, such as components for thin film transistors or solar cell contacts.
    Type: Application
    Filed: January 19, 2012
    Publication date: July 25, 2013
    Inventors: Weidong Li, Gina Elizabeth Pengra-Leung, Uma Srinivasan, Shivkumar Chiruvolu, Masaya Soeda, Guojon Liu
  • Publication number: 20130105806
    Abstract: Silicon nanoparticle inks provide a basis for the formation of desirable materials. Specifically, composites have been formed in thin layers comprising silicon nanoparticles embedded in an amorphous silicon matrix, which can be formed at relatively low temperatures. The composite material can be heated to form a nanocrystalline material having crystals that are non-rod shaped. The nanocrystalline material can have desirable electrical conductive properties, and the materials can be formed with a high dopant level. Also, nanocrystalline silicon pellets can be formed from silicon nanoparticles deposited form an ink in which the pellets can be relatively dense although less dense than bulk silicon. The pellets can be formed from the application of pressure and heat to a silicon nanoparticle layer.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 2, 2013
    Inventors: Guojun Liu, Shivkumar Chiruvolu, Weidong Li, Uma Srinivasan
  • Publication number: 20120193769
    Abstract: The use of doped silicon nanoparticle inks and other liquid dopant sources can provide suitable dopant sources for driving dopant elements into a crystalline silicon substrate using a thermal process if a suitable cap is provided. Suitable caps include, for example, a capping slab, a cover that may or may not rest on the surface of the substrate and a cover layer. Desirable dopant profiled can be achieved. The doped nanoparticles can be delivered using a silicon ink. The residual silicon ink can be removed after the dopant drive-in or at least partially densified into a silicon material that is incorporated into the product device. The silicon doping is suitable for the introduction of dopants into crystalline silicon for the formation of solar cells.
    Type: Application
    Filed: May 23, 2011
    Publication date: August 2, 2012
    Inventors: Guojun Liu, Uma Srinivasan, Shivkumar Chiruvolu
  • Publication number: 20120169820
    Abstract: A patterned layer over a wafer is produced by depositing a print-patterned mask structure. Energized particles of a target material are deposited over the wafer and the print-patterned mask such that particles of said target material incident on the mask structure enter the mask structure body and minimally accumulate, if at all, on the surface of the mask structure, and otherwise the particles of target material accumulate as a generally uniform layer over the wafer. The print-patterned mask structure, including particles of target material therein, is removed leaving the generally uniform layer of target material as a patterned layer over the wafer.
    Type: Application
    Filed: March 13, 2012
    Publication date: July 5, 2012
    Applicant: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: Scott Limb, Uma Srinivasan