Patents by Inventor Vinayak Tilak
Vinayak Tilak 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).
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Patent number: 7827852Abstract: A gas sensor is disclosed. The gas sensor includes a gas sensing layer including doped oxygen deficient tungsten oxide and a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof, at least one electrode positioned within a layer of titanium, and a response modification layer. The at least one electrode is in communication with the gas sensing layer and the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx O2, H2O, and NH3. A method of fabricating the gas sensor is also disclosed.Type: GrantFiled: December 20, 2007Date of Patent: November 9, 2010Assignee: General Electric CompanyInventors: Jun Cui, John Patrick Lemmon, Kalaga Murali Krishna, Geetha Karavoor, Vinayak Tilak, Mohandas Nayak, Ravikumar Hanumantha
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Patent number: 7781312Abstract: A method for fabricating a SiC MOSFET is disclosed. The method includes growing a SiC epilayer over a substrate, planarizing the SiC epilayer to provide a planarized SiC epilayer, and forming a gate dielectric layer in contact with the planarized epilayer.Type: GrantFiled: December 13, 2006Date of Patent: August 24, 2010Assignee: General Electric CompanyInventors: Kevin Sean Matocha, Vinayak Tilak, Stephen Daley Arthur, Zachary Matthew Stum
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Publication number: 20100128439Abstract: A thermal management system includes graphene paper disposed between a heat source and a heat sink to transfer heat therebetween. The graphene paper is oriented such that the individual layers are substantially perpendicular to the plane of the heat source and the plane of the heat sink to maximize heat transfer. The heat source and the heat sink can be any physical structure that emits and absorbs thermal energy, respectively. The graphene paper may be bonded to the heat source and the heat sink using a bonding agent, such as a thermally conductive material, and the like. The graphene paper may be formed in several different configurations, such as a spring structure, and the like.Type: ApplicationFiled: November 24, 2008Publication date: May 27, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Vinayak Tilak, Kaustubh Ravindra Nagarkar, Loucas Tsakalakos, Todd Garrett Wetzel
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Publication number: 20100123140Abstract: The present invention generally relates to a method for improving inversion layer mobility and providing low defect density in a semiconductor device based upon a silicon carbide (SiC) substrate. More specifically, the present invention provides a method for the manufacture of a semiconductor device based upon a silicon carbide substrate and comprising an oxide layer comprising incorporating at least one additive into the atomic structure of the oxide layer. Semiconductor devices, such as MOSFETS, based upon a substrate treated according to the present method are expected to have inversion layer mobilities of at least about 60 cm2/Vs.Type: ApplicationFiled: November 20, 2008Publication date: May 20, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Victor Lienkong Lou, Kevin Sean Matocha, Aveek Chatterjee, Vinayak Tilak, Stephen Arthur, Zachary Stum
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Publication number: 20100093116Abstract: There is provided a method for dimension profiling of a semiconductor device. The method involves incorporating a feature comprising a detectable element into the device, and thereafter detecting the detectable element to determine a dimension of the feature. This information can be used for the determination of a dimension of buried channels, and also for end-point detection of CMP processes.Type: ApplicationFiled: October 14, 2008Publication date: April 15, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Jody Alan Fronheiser, Peter Micah Sandvik, Kevin Sean Matocha, Vinayak Tilak
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Patent number: 7589360Abstract: A device having an electrode-insulator layer-group III nitride layer structure, wherein an interface between the insulator layer and the group III nitride semiconductor layer lies along a non-polar plane of the group III nitride semiconductor layer is provided.Type: GrantFiled: November 8, 2006Date of Patent: September 15, 2009Assignee: General Electric CompanyInventors: Kevin Sean Matocha, Vinayak Tilak
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Publication number: 20090159445Abstract: A gas sensor is disclosed. The gas sensor includes a gas sensing layer, at least one electrode, an adhesion layer, and a response modification layer adjacent to said gas sensing layer and said layer of adhesion. A system having an exhaust system and a gas sensor is also disclosed. A method of fabricating the gas sensor is also disclosed.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Kalaga Murali Krishna, Geetha Karavoor, John Patrick Lemmon, Jun Cui, Vinayak Tilak, Mohandas Nayak, Ravikumar Hanumantha
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Publication number: 20090159929Abstract: A heterostructure device includes a semiconductor multi-layer structure that has a first region, a second region and a third region. The first region is coupled to a source electrode and the second region is coupled to a drain electrode. The third region is disposed between the first region and the second region. The third region provides a switchable electrically conductive pathway from the source electrode to the drain electrode. The third region includes iodine ions. A system includes a heterostructure field effect transistor that includes the device.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Vinayak Tilak, Alexei Vertiatchikh, Kevin Sean Matocha, Peter Micah Sandvik, Siddharth Rajan
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Publication number: 20090159446Abstract: A gas sensor is disclosed. The gas sensor includes a gas sensing layer including doped oxygen deficient tungsten oxide and a dopant selected from the group consisting of Re, Ni, Cr, V, W, and a combination thereof, at least one electrode positioned within a layer of titanium, and a response modification layer. The at least one electrode is in communication with the gas sensing layer and the gas sensing layer is capable of detecting at least one gas selected from the group consisting of NO, NO2, SOx O2, H2O, and NH3. A method of fabricating the gas sensor is also disclosed.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Jun Cui, John Patrick Lemmon, Kalaga Murali Krishna, Geetha Karavoor, Vinayak Tilak, Mohandas Nayak, Ravikumar Hanumantha
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Patent number: 7547953Abstract: Gallium oxide films for sensing gas comprise Ga2O3 and have a porosity of at least about 30%. Such films can be formed by coating a substrate with a solution comprising: a gallium salt and a porogen comprising an organic compound comprising a hydrophilic chain and a hydrophobic chain; and heating the substrate to a temperature in the range from about 400° C. to about 600° C. while exposing the substrate to an oxygen-containing source to convert the gallium salt to a gallium oxide.Type: GrantFiled: January 29, 2007Date of Patent: June 16, 2009Assignee: General Electric CompanyInventors: Anthony Yu-Chung Ku, Steven Alfred Tysoe, Vinayak Tilak, Peter Micah Sandvik, Sergio Paulo Martins Loureiro, James Anthony Ruud, Anis Zribi, Wei-Cheng Tian
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Publication number: 20090140293Abstract: A heterostructure device or article includes a carrier transport layer, a back channel layer and a barrier layer. The carrier transport layer has a first surface and a second surface opposing to the first surface. The back channel layer is secured to the first surface of the carrier transport layer and the barrier layer is secured to the second surface of the carrier transport layer. Each of the carrier transport layer, the back channel layer and the barrier layer comprises an aluminum gallium nitride alloy. The article further includes a 2D electron gas at an interface of the second surface of the carrier transport layer and a surface of the barrier layer. The 2D electron gas is defined by a bandgap differential at an interface, which allows for electron mobility. A system includes a heterostructure field effect transistor that includes the article.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Alexei Vertiatchikh, Kevin Sean Matocha, Peter Micah Sandvik, Vinayak Tilak, Siddharth Rajan, Ho-Young Cha
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Patent number: 7527742Abstract: An etchant including a halogenated salt, such as Cryolite (Na3AlF6) or potassium tetrafluoro borate (KBF4), is provided. The salt may be present in the etchant in an amount sufficient to etch a substrate and may have a melt temperature of greater than about 200 degrees Celsius. A method of wet etching may include contacting an etchant to at least one surface of a support layer of a multi-layer laminate, wherein the support layer may include aluminum oxide; or contacting an etchant to at least one surface of a support layer of a multi-layer laminate, wherein the etchant may include Cryolite (Na3AlF6), potassium tetrafluoro borate (KBF4), or both; and etching at least a portion of the support layer. The method may provide a laminate produced by growing a crystal onto an aluminum oxide support layer, and chemically removing at least a portion of the support layer by wet etch. An electronic device, optical device or combined device including the laminate is provided.Type: GrantFiled: June 27, 2005Date of Patent: May 5, 2009Assignee: Momentive Performance Materials Inc.Inventors: Steven Alfred Tysoe, Steven Francis LeBoeuf, Mark Philip D'Evelyn, Venkat Subramaniam Venkataramani, Vinayak Tilak, Jeffrey Bernard Fortin, Charles Adrian Becker, Stephen Daley Arthur, Samhita Dasgupta, Kanakasabapathi Subramanian, Robert John Wojnarowski, Abasifreke Udo Ebong
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Patent number: 7521732Abstract: A vertical heterostructure field effect transistor including a first layer having a first material, and the first material having a hexagonal crystal lattice structure defining a first bandgap and one or more non-polar planes is provided. The transistor further includes a second layer that is adjacent to the first layer having a second material. Further, the second layer has a first surface and a second surface, and a portion of the second layer first surface is coupled to the surface of the first layer to form a two dimensional charge gas and to define a first region. The second material may have a second bandgap that is different than the first bandgap.Type: GrantFiled: November 18, 2005Date of Patent: April 21, 2009Assignee: General Electric CompanyInventors: Kevin Sean Matocha, Vinayak Tilak
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Publication number: 20080302672Abstract: A sensor system for measuring a plurality of chemical species is disclosed. The sensor system includes a plurality of semiconductor device sensor elements, wherein each sensor element includes at least one wide band gap semiconductor layer and at least one catalytic layer configured to have an electrical property modifiable on exposure to an analyte including one or more chemical species; and an acquisition and analysis system configured to receive sensor signals from the plurality of sensor elements and to use multivariate analysis techniques to analyze the sensor signals to provide multivariate analyte measurement data.Type: ApplicationFiled: June 5, 2007Publication date: December 11, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Peter Micah Sandvik, Radislav Alexandrovich Potyrailo, Vinayak Tilak, John Patrick Lemmon, Elena Babes-Dornea, Yves Grincourt, Charles-Olivier Fournier
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Publication number: 20080180209Abstract: Gallium oxide films for sensing gas comprise Ga2O3 and have a porosity of at least about 30%. Such films can be formed by coating a substrate with a solution comprising: a gallium salt and a porogen comprising an organic compound comprising a hydrophilic chain and a hydrophobic chain; and heating the substrate to a temperature in the range from about 400° C. to about 600° C. while exposing the substrate to an oxygen-containing source to convert the gallium salt to a gallium oxide.Type: ApplicationFiled: January 29, 2007Publication date: July 31, 2008Inventors: Anthony Yu-Chung Ku, Steven Alfred Tysoe, Vinayak Tilak, Peter Micah Sandvik, Sergio Paulo Martins Loureiro, James Anthony Ruud, Anis Zribi, Wei-Cheng Tian
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Publication number: 20080146004Abstract: A method for fabricating a SiC MOSFET is disclosed. The method includes growing a SiC epilayer over a substrate, planarizing the SiC epilayer to provide a planarized SiC epilayer, and forming a gate dielectric layer in contact with the planarized epilayer.Type: ApplicationFiled: December 13, 2006Publication date: June 19, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Kevin Sean Matocha, Vinayak Tilak, Stephen Daley Arthur, Zachary Matthew Stum
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Publication number: 20080121927Abstract: A device having an electrode-insulator layer-group III nitride layer structure, wherein an interface between the insulator layer and the group III nitride semiconductor layer lies along a non-polar plane of the group III nitride semiconductor layer is provided.Type: ApplicationFiled: November 8, 2006Publication date: May 29, 2008Inventors: Kevin Sean Matocha, Vinayak Tilak
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Patent number: 7367217Abstract: A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, InN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.Type: GrantFiled: March 8, 2007Date of Patent: May 6, 2008Assignee: General Electric CompanyInventors: Edward B. Stokes, Peter M. Sandvik, Vinayak Tilak, Jeffrey B. Fedison, Elena Babes-Dornea, Renyan Qin, James W. Rose, Stanton E. Weaver
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Patent number: 7313965Abstract: A high-temperature pressure sensor that includes a dielectric layer. The pressure sensor also includes a substrate capable of withstanding temperatures greater than 450° C. without entering a phase change, at least one semiconducting material deposited on the sapphire substrate, and a silicon dioxide layer deposited over the semiconducting material. One aspect of the pressure sensor includes a second semiconducting material.Type: GrantFiled: August 25, 2006Date of Patent: January 1, 2008Assignee: General Electric CompanyInventors: Vinayak Tilak, Jie Jiang, David Mulford Shaddock, Stacey Joy Kennerly, David Richard Esler, Aaron Jay Knobloch
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Patent number: 7254986Abstract: A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, lnN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.Type: GrantFiled: December 13, 2002Date of Patent: August 14, 2007Assignee: General Electric CompanyInventors: Edward B. Stokes, Peter M. Sandvik, Vinayak Tilak, Jeffrey B. Fedison, Elena Babes-Dornea, Renyan Qin, James W. Rose, Stanton E. Weaver