Patents by Inventor Supratik Guha

Supratik Guha 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: 8604559
    Abstract: A semiconductor device includes a bonding surface, a semiconducting nanostructure including one of a nanowire and a nanocrystal, which is formed on the bonding surface, and a source electrode and a drain electrode which are formed on the nanostructure such that the nanostructure is electrically connected to the source and drain electrodes.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: December 10, 2013
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Supratik Guha, Cherie R. Kagan, George S. Tulevski, Emanuel Tutuc
  • Patent number: 8592675
    Abstract: Photovoltaic devices and techniques for enhancing efficiency thereof are provided. In one aspect, a photovoltaic device is provided. The photovoltaic device comprises a photocell having a first photoactive layer and a second photoactive layer adjacent to the first photoactive layer so as to form a heterojunction between the first photoactive layer and the second photoactive layer; and a plurality of high-aspect-ratio nanostructures on one or more surfaces of the second photoactive layer. The plurality of high-aspect-ratio nanostructures are configured to act as a scattering media for incident light. The plurality of high-aspect-ratio nanostructures can also be configured to create an optical resonance effect in the incident light.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 26, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Oki Gunawan
  • Patent number: 8569616
    Abstract: A method of concentrating solar energy includes receiving solar energy through a surface of an optically clear shell, guiding the solar energy through a liquid contained in the optically clear shell, folding the solar energy back through the liquid toward a solar receiver, and shifting the solar receiver within the optically clear shell to track the sun, wherein the solar energy collected by the solar receiver is converted into electrical energy.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 29, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Philip C. Hobbs, Yves C. Martin, Robert L. Sandstrom, Theodore G. van Kessel
  • Patent number: 8551558
    Abstract: Photovoltaic devices and techniques for enhancing efficiency thereof are provided. In one aspect, a photovoltaic device is provided. The photovoltaic device comprises a photocell having a photoactive layer and a non-photoactive layer adjacent to the photoactive layer so as to form a heterojunction between the photoactive layer and the non-photoactive layer; and a plurality of high-aspect-ratio nanostructures on one or more surfaces of the photoactive layer. The plurality of high-aspect-ratio nanostructures are configured to act as a scattering media for incident light. The plurality of high-aspect-ratio nanostructures can also be configured to create an optical resonance effect in the incident light.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 8, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Oki Gunawan
  • Patent number: 8518766
    Abstract: A field effect transistor (FET) includes a body region and a source region disposed at least partially in the body region. The FET also includes a drain region disposed at least partially in the body region and a molybdenum oxynitride (MoNO) gate. The FET also includes a dielectric having a high dielectric constant (k) disposed between the body region and the MoNO gate.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: August 27, 2013
    Assignee: International Business Machines Corporation
    Inventors: Nestor A. Bojarczuk, Michael P. Chudzik, Matthew W. Copel, Supratik Guha, Richard A. Haight, Vijay Narayanan, Martin P. O'Boyle, Vamsi K. Paruchuri
  • Publication number: 20130199594
    Abstract: A transportable photovoltaic system includes a plurality of photovoltaic devices, a composite frame to which the plurality of photovoltaic devices are affixed, and a base structure to which the composite frame is movably attached through at least one variable-angle mount structure. The orientation of the frame and the light concentrating elements relative to the base structure can be altered employing the at least one variable-angle mount structure. The frame and the plurality of photovoltaic devices can be assembled prior to shipping, and the base structure can be manufactured on site. The transportable photovoltaic system is not affixed to ground or other fixture, but can be picked up at any time during the operational lifetime. The transportable photovoltaic system can be rapidly deployed with little or no site preparation requirement other than generally level ground, and can be retracted to a lower exposure position to avoid storm and/or hazardous conditions.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 8, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Supratik Guha, Yves C. Martin, David B. Mitzi, Robert L. Sandstrom, Theodore G. van Kessel
  • Publication number: 20130199597
    Abstract: A transportable photovoltaic system includes a plurality of photovoltaic devices, a composite frame to which the plurality of photovoltaic devices are affixed, and a base structure to which the composite frame is movably attached through at least one variable-angle mount structure. The orientation of the frame and the light concentrating elements relative to the base structure can be altered employing the at least one variable-angle mount structure. The frame and the plurality of photovoltaic devices can be assembled prior to shipping, and the base structure can be manufactured on site. The transportable photovoltaic system is not affixed to ground or other fixture, but can be picked up at any time during the operational lifetime. The transportable photovoltaic system can be rapidly deployed with little or no site preparation requirement other than generally level ground, and can be retracted to a lower exposure position to avoid storm and/or hazardous conditions.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 8, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Supratik Guha, Yves C. Martin, David B. Mitzi, Robert L. Sandstrom, Theodore G. van Kessel
  • Patent number: 8490619
    Abstract: A solar energy alignment and collection system includes at least two solar energy receivers having a central focal point, with each of the at least two solar energy receivers generating an energy output. An actuation system is operatively coupled to the at least two solar energy receivers and is configured and disposed to shift the solar energy receivers along at least one axis. A control system, operatively linked to the solar receivers and the actuation system, senses the energy output of each solar energy receiver and shifts the actuation system along the at least one axis causing solar energy to be directed at the central focal point. When solar energy is directed at the central focal point, the energy output of each solar energy receiver is substantially identical.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: July 23, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Yves C. Martin, Robert L. Sandstrom, Theodore G. van Kessel
  • Patent number: 8440497
    Abstract: A Kesterite film is vacuum deposited and annealed on a substrate. Deposition is conducted at low temperature to provide good composition control and efficient use of metals. Annealing is conducted at a high temperature for a short period of time. Thermal evaporation, E-beam evaporation or sputtering in a high vacuum environment may be employed as part of a deposition process.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: May 14, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Kejia Wang
  • Patent number: 8373758
    Abstract: Techniques for analyzing performance of solar panels and/or cells are provided. In one aspect, a method for analyzing an infrared thermal image taken using an infrared camera is provided. The method includes the following steps. The infrared thermal image is converted to temperature data. Individual elements are isolated in the infrared thermal image. The temperature data for each isolated element is tabulated. A performance status of each isolated element is determined based on the tabulated temperature data. The individual elements can include solar panels and/or solar cells. In another aspect, an infrared diagnostic system is provided. The infrared diagnostic system includes an infrared camera which can be remotely positioned relative to one or more elements to be imaged; and a computer configured to receive thermal images from the infrared camera, via a communication link, and analyze the thermal images.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: February 12, 2013
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Yves C. Martin, Robert L. Sandstrom, Theodore Gerard van Kessel
  • Patent number: 8362582
    Abstract: A semiconductor structure is provided, which includes multiple sections arranged along a longitudinal axis. Preferably, the semiconductor structure comprises a middle section and two terminal sections located at opposite ends of the middle section. A semiconductor core having a first dopant concentration preferably extends along the longitudinal axis through the middle section and the two terminal sections. A semiconductor shell having a second, higher dopant concentration preferably encircles a portion of the semiconductor core at the two terminal sections, but not at the middle section, of the semiconductor structure. It is particularly preferred that the semiconductor structure is a nanostructure having a cross-sectional dimension of not more than 100 nm.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: January 29, 2013
    Assignee: International Business Machines Corporation
    Inventors: Joerg Appenzeller, Supratik Guha, Emanuel Tutuc
  • Patent number: 8362477
    Abstract: A memory device and a method of forming the same are provided. The memory device includes a substrate; a set of electrodes disposed on the substrate; a dielectric layer formed between the set of electrodes; and a transition metal oxide layer formed between the set of electrodes, the transition metal oxide layer configured to undergo a metal-insulator transition (MIT) to perform a read or write operation.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: January 29, 2013
    Assignee: International Business Machines Corporation
    Inventors: Tymon Barwicz, Keith A. Jenkins, Supratik Guha
  • Publication number: 20130013206
    Abstract: A method, an apparatus and an article of manufacture for forecasting a meteorological parameter. The method includes analyzing geographically distributed sensor network data to assess spatial and temporal variation of a meteorological parameter in real-time, correlating at least two portions of data from the sensor network to identify a temporal and spatial evolution of the meteorological parameter, and forecasting the meteorological parameter based on the temporal and spatial evolution of the meteorological parameter.
    Type: Application
    Filed: July 5, 2011
    Publication date: January 10, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Supratik Guha, Hendrik F. Hamann, Levente Klein
  • Publication number: 20120318327
    Abstract: A method of cooling a solar concentrator includes absorbing heat from solar energy collectors into a chamber section. The chamber section is arranged below, in a heat exchange relationship, the solar energy collectors.
    Type: Application
    Filed: August 31, 2012
    Publication date: December 20, 2012
    Applicant: International Business Machines Corporation
    Inventors: Supratik Guha, Yves C. Martin, Robert L. Sandstrom, Theodore G. van Kessel
  • Publication number: 20120300534
    Abstract: A method of operating a memory device having a dielectric material layer, a transition metal oxide layer and a set of electrodes each formed over a substrate, includes applying a voltage across the set of electrodes producing an electric field across the transition metal oxide layer enabling the transition metal oxide layer to undergo a metal-insulation transition (MIT) to perform a read or write operation on memory device.
    Type: Application
    Filed: August 9, 2012
    Publication date: November 29, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Tymon Barwicz, Keith A. Jenkins, Supratik Guha
  • Publication number: 20120270385
    Abstract: A field effect transistor (FET) includes a body region and a source region disposed at least partially in the body region. The FET also includes a drain region disposed at least partially in the body region and a molybdenum oxynitride (MoNO) gate. The FET also includes a dielectric having a high dielectric constant (k) disposed between the body region and the MoNO gate.
    Type: Application
    Filed: June 28, 2012
    Publication date: October 25, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nestor A. Bojarczuk, Michael P. Chudzik, Matthew W. Copel, Supratik Guha, Richard A. Haight, Vijay Narayanan, Martin P. O'Boyle, Vamsi K. Paruchuri
  • Publication number: 20120201956
    Abstract: A method and apparatus for fabricating or altering a microstructure use means for heating to facilitate a local chemical reaction that forms or alters the submicrostructure.
    Type: Application
    Filed: April 16, 2012
    Publication date: August 9, 2012
    Applicant: International Business Machines Corporation
    Inventors: SUPRATIK GUHA, HENDRIK F. HAMANN, HERSCHEL M. MARCHMAN, ROBERT J. VON GUTFELD
  • Publication number: 20120196401
    Abstract: Techniques for fabricating nanowire/microwire-based solar cells are provided. In one, a method for fabricating a solar cell is provided. The method includes the following steps. A doped substrate is provided. A monolayer of spheres is deposited onto the substrate. The spheres include nanospheres, microspheres or a combination thereof. The spheres are trimmed to introduce space between individual spheres in the monolayer. The trimmed spheres are used as a mask to pattern wires in the substrate. The wires include nanowires, microwires or a combination thereof. A doped emitter layer is formed on the patterned wires. A top contact electrode is deposited over the emitter layer. A bottom contact electrode is deposited on a side of the substrate opposite the wires.
    Type: Application
    Filed: April 12, 2012
    Publication date: August 2, 2012
    Applicant: International Business Machines Corporation
    Inventors: William Graham, Supratik Guha, Oki Gunawan, George S. Tulevski, Kejia Wang, Ying Zhang
  • Publication number: 20120186626
    Abstract: A solar energy collection system includes a reference member, a support member rotatably mounted relative to the reference member, and a drive system operatively coupled between the reference member and the support member. The drive system includes a linear actuator having a fixed portion operatively connected to the reference member and a strut portion that is selectivity extendable relative to the fixed portion. The strut portion includes an end section. A first connector member is operatively connected between the reference member and the end section of the strut portion, and a second connector member is operatively connected between the support member and the end section of the strut portion. Selective extension and retraction of the strut portion relative to the fixed portion selectively shifts the support member along a desired path.
    Type: Application
    Filed: January 26, 2011
    Publication date: July 26, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Supratik Guha, Yves C. Martin, Naim Moumen, Robert L. Sandstrom, Theodore G. Van Kessel
  • Patent number: 8211735
    Abstract: Techniques for fabricating nanowire/microwire-based solar cells are provided. In one, a method for fabricating a solar cell is provided. The method includes the following steps. A doped substrate is provided. A monolayer of spheres is deposited onto the substrate. The spheres include nanospheres, microspheres or a combination thereof The spheres are trimmed to introduce space between individual spheres in the monolayer. The trimmed spheres are used as a mask to pattern wires in the substrate. The wires include nanowires, microwires or a combination thereof A doped emitter layer is formed on the patterned wires. A top contact electrode is deposited over the emitter layer. A bottom contact electrode is deposited on a side of the substrate opposite the wires.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: July 3, 2012
    Assignee: International Business Machines Corporation
    Inventors: William Graham, Supratik Guha, Oki Gunawan, George S. Tulevski, Kejia Wang, Ying Zhang