Patents by Inventor Omkaram Nalamasu

Omkaram Nalamasu 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: 20120318773
    Abstract: The present invention provides methods and an apparatus for controlling and modifying line width roughness (LWR) of a photoresist layer with enhanced electron spinning control. In one embodiment, an apparatus for controlling a line width roughness of a photoresist layer disposed on a substrate includes a processing chamber having a chamber body having a top wall, side wall and a bottom wall defining an interior processing region, a support pedestal disposed in the interior processing region of the processing chamber, and a plasma generator source disposed in the processing chamber operable to provide predominantly an electron beam source to the interior processing region.
    Type: Application
    Filed: April 25, 2012
    Publication date: December 20, 2012
    Applicant: Applied Materials, Inc.
    Inventors: Banqiu Wu, Ajay Kumar, Kartik Ramaswamy, Omkaram Nalamasu
  • Patent number: 8334017
    Abstract: A method and apparatus are provided for formation of a composite material on a substrate. The composite material includes carbon nanotubes and/or nanofibers, and composite intrinsic and doped silicon structures. In one embodiment, the substrates are in the form of an elongated sheet or web of material, and the apparatus includes supply and take-up rolls to support the web prior to and after formation of the composite materials. The web is guided through various processing chambers to form the composite materials. In another embodiment, the large scale substrates comprise discrete substrates. The discrete substrates are supported on a conveyor system or, alternatively, are handled by robots that route the substrates through the processing chambers to form the composite materials on the substrates. The composite materials are useful in the formation of energy storage devices and/or photovoltaic devices.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: December 18, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Victor L. Pushparaj, Pravin K. Narwankar, Dieter Haas, Bipin Thakur, Mahesh Arcot, Vikas Gujar, Omkaram Nalamasu
  • Publication number: 20120312474
    Abstract: Methods of and hybrid factories for thin-film battery manufacturing are described. A method includes operations for fabricating a thin-film battery. A hybrid factory includes one or more tool sets for fabricating a thin-film battery.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 13, 2012
    Inventors: Byung-Sung Kwak, Stefan Bangert, Dieter Haas, Omkaram Nalamasu
  • Publication number: 20120218621
    Abstract: The present invention generally relates to electrochromic (EC) devices, such as used in electrochromic windows (ECWs), and their manufacture. The EC devices may comprise a transparent substrate; a first transparent conductive layer; a doped coloration layer, wherein the coloration layer dopants provide structural stability to the arrangement of atoms in the coloration layer; an electrolyte layer; a doped anode layer over said electrolyte layer, wherein the anode layer dopant provides increased electrically conductivity in the doped anode layer; and a second transparent conductive layer. A method of fabricating an electrochromic device may comprise depositing on a substrate, in sequence, a first transparent conductive layer, a doped coloration layer, an electrolyte layer, a doped anode layer, and a second transparent conductive layer, wherein at least one of the doped coloration layer, the electrolyte layer and the doped anode layer is sputter deposited using a combinatorial plasma deposition process.
    Type: Application
    Filed: October 22, 2010
    Publication date: August 30, 2012
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Byung Sung Leo Kwak, Kaushal K. Singh, Joseph G. Gordon, II, Omkaram Nalamasu
  • Patent number: 8252772
    Abstract: The present invention provides nanoscale and microscale compositions useful for a variety of purposes, including the diagnosis and treatment of diseases. In one embodiment, the present invention provides a disease treatment system comprising a thermal induction agent and a radiation source, wherein the thermal induction agent comprises at least one carbon nanotube, at least one carbon microtube, or a mixture thereof.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: August 28, 2012
    Assignee: Wake Forest University
    Inventors: Suzy Torti, Frank Torti, David Loren Carroll, Steven Akman, Omkaram Nalamasu, Pulickel Ajayan
  • Publication number: 20120156819
    Abstract: Fabrication of gallium nitride-based light emitting diodes (LEDs) with physical vapor deposition (PVD) formed aluminum nitride buffer layers is described.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 21, 2012
    Inventors: Mingwei Zhu, Vivek Agrawal, Nag B. Patibandla, Omkaram Nalamasu
  • Publication number: 20120080092
    Abstract: Embodiments of the invention provide a method of forming a doped gallium arsenide based (GaAs) layer from a solution based precursor. The doped gallium arsenide based (GaAs) layer formed from the solution based precursor may assist solar cell devices to improve light absorption and conversion efficiency. In one embodiment, a method of forming a solar cell device includes forming a first layer with a first type of dopants doped therein over a surface of a substrate, forming a GaAs based layer on the first layer, and forming a second layer with a second type of dopants doped therein on the GaAs based layer.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 5, 2012
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Kaushal K. Singh, Robert Jan Visser, Srikant Rao, Bhaskar Kumar, Claire J. Carmalt, Ranga Rao Arnepalli, Omkaram Nalamasu, Gaurav Saraf, Sanjayan Sathasivam, Christopher Stuart Blackman
  • Patent number: 8136551
    Abstract: Precise control over gas delivery is achieved at the micro and nanobar mass levels by incorporating blocks of aligned carbon nanotubes into valves and finely adjusting the flow through the block by controlling a compressing force applied to the block. A valve for controlling gas flow includes: a valve housing; a block of aligned carbon nanotubes, the block and the valve housing being configured to direct the gas through the carbon nanotubes in the block; and a device configured to apply a force to the block in order to compress the block, wherein the block is compressed perpendicular to the walls of the carbon nanotubes in the block; whereby the application of the force to the walls restricts the flow of the gas through the valve. The valve may further comprise an electrical device for monitoring the electrical properties of the carbon nanotube block. This monitoring provides information on the state of compression of the carbon nanotube block and/or the gas that is flowing through the valve.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: March 20, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Victor L. Pushparaj, Omkaram Nalamasu
  • Publication number: 20110315186
    Abstract: Embodiments of the invention provide a thin single crystalline silicon film solar cell and methods of forming the same. The method includes forming a thin single crystalline silicon layer on a silicon growth substrate, followed by forming front or rear solar cell structures on and/or in the thin single crystalline silicon film. The method also includes attaching the thin single crystalline silicon film to a mechanical carrier and then separating the growth substrate from the thin single crystalline silicon film along a cleavage plane formed between the growth substrate and the thin single crystalline silicon film. Front or rear solar cell structures are then formed on and/or in the thin single crystalline silicon film opposite the mechanical carrier to complete formation of the solar cell.
    Type: Application
    Filed: May 12, 2011
    Publication date: December 29, 2011
    Applicant: APPLIED MATERIALS, INC.
    Inventors: James M. Gee, Nag B. Patibandla, Kaushal K. Singh, Omkaram Nalamasu
  • Patent number: 7971489
    Abstract: A robust, stand-alone load cell comprises a block of aligned carbon nanotubes with parallel electrodes on opposing sides of the block and an electrical circuit connected between the electrodes for measuring the electrical resistance of the block. The nanotubes are preferably aligned perpendicular to the electrodes. Carbon nanotube-based load cells may be incorporated into a wafer assembly for characterizing semiconductor processing equipment. Such a wafer assembly includes two parallel wafers with a plurality of carbon nanotube load cells positioned between and attached to both wafers. The load cells are independently electrically connected to a device which monitors and records the resistivity of the load cell.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 5, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Victor L. Pushparaj, Omkaram Nalamasu, Manoocher Birang
  • Publication number: 20110126402
    Abstract: Methods of and factories for thin-film battery manufacturing are described. A method includes operations for fabricating a thin-film battery. A factory includes one or more tool sets for fabricating a thin-film battery.
    Type: Application
    Filed: September 14, 2010
    Publication date: June 2, 2011
    Inventors: Byung-Sung Kwak, Stefan Bangert, Dieter Haas, Omkaram Nalamasu
  • Publication number: 20110100955
    Abstract: A method and apparatus are provided for formation of a composite material on a substrate. The composite material includes carbon nanotubes and/or nanofibers, and composite intrinsic and doped silicon structures. In one embodiment, the substrates are in the form of an elongated sheet or web of material, and the apparatus includes supply and take-up rolls to support the web prior to and after formation of the composite materials. The web is guided through various processing chambers to form the composite materials. In another embodiment, the large scale substrates comprise discrete substrates. The discrete substrates are supported on a conveyor system or, alternatively, are handled by robots that route the substrates through the processing chambers to form the composite materials on the substrates. The composite materials are useful in the formation of energy storage devices and/or photovoltaic devices.
    Type: Application
    Filed: September 17, 2010
    Publication date: May 5, 2011
    Applicant: Applied Materials, Inc.
    Inventors: VICTOR L. PUSHPARAJ, Pravin K. Narwankar, Dieter Haas, Bipin Thakur, Mahesh Arcot, Vikas Gujar, Omkaram Nalamasu
  • Patent number: 7906558
    Abstract: The invention provides the use of novel, binary guanosine gels for simple, rapid and nondestructive solubilization of individual single walled carbon nanotubes (SWNTs) at high concentrations. The gels exhibit selectivity between metallic and semiconducting SWNTs and, further, among SWNTs with different chiralities.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: March 15, 2011
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Linda B. McGown, Omkaram Nalamasu, Yuehua Yu
  • Publication number: 20110051322
    Abstract: Embodiments of the present invention generally relate to methods and apparatus for forming an energy storage device. More particularly, embodiments described herein relate to methods of forming electric batteries and electrochemical capacitors. In one embodiment a method of forming a high surface area electrode for use in an energy storage device is provided. The method comprises forming an amorphous silicon layer on a current collector having a conductive surface, immersing the amorphous silicon layer in an electrolytic solution to form a series of interconnected pores in the amorphous silicon layer, and forming carbon nanotubes within the series of interconnected pores of the amorphous silicon layer.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 3, 2011
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Victor L. Pushparaj, Omkaram Nalamasu, Steven Verhaverbeke
  • Publication number: 20110045349
    Abstract: Methods and apparatus for forming energy storage devices are provided. In one embodiment a method of producing an energy storage device is provided. The method comprises positioning an anodic current collector into a processing region, depositing one or more three-dimensional electrodes separated by a finite distance on a surface of the anodic current collector such that portions of the surface of the anodic current collector remain exposed, depositing a conformal polymeric layer over the anodic current collector and the one or more three-dimensional electrodes using iCVD techniques comprising flowing a gaseous monomer into the processing region, flowing a gaseous initiator into the processing region through a heated filament to form a reactive gas mixture of the gaseous monomer and the gaseous initiator, wherein the heated filament is heated to a temperature between about 300° C. and about 600° C., and depositing a conformal layer of cathodic material over the conformal polymeric layer.
    Type: Application
    Filed: August 18, 2010
    Publication date: February 24, 2011
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Victor L. Pushparaj, Pravin K. Narwankar, Omkaram Nalamasu
  • Publication number: 20100313951
    Abstract: Solar cells are provided with carbon nanotubes (CNTs) which are used: to define a micron/sub-micron geometry of the solar cells; and/or as charge transporters for efficiently removing charge carriers from the absorber layer to reduce the rate of electron-hole recombination in the absorber layer. A solar cell may comprise: a substrate; a multiplicity of areas of metal catalyst on the surface of the substrate; a multiplicity of carbon nanotube bundles formed on the multiplicity of areas of metal catalyst, each bundle including carbon nanotubes aligned roughly perpendicular to the surface of the substrate; and a photoactive solar cell layer formed over the carbon nanotube bundles and exposed surfaces of the substrate, wherein the photoactive solar cell layer is continuous over the carbon nanotube bundles and the exposed surfaces of the substrate.
    Type: Application
    Filed: June 9, 2010
    Publication date: December 16, 2010
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Omkaram Nalamasu, Charles Gay, Victor L. Pushparaj, Kaushal K. Singh, Robert J. Visser, Majeed A. Foad, Ralf Hofmann
  • Publication number: 20100261049
    Abstract: A readily manufacturable, high power, high energy, large area energy storage device is described. The energy storage device may use processes compatible with large area processing tools, such as large area coating systems and linear processing systems compatible with flexible thin film substrates. The energy storage devices may include batteries, super-capacitors and ultra-capacitors. An energy storage device may include a multiplicity of thin film cells formed on a single substrate, the multiplicity of cells being electrically connected in series, each one of the multiplicity of cells comprising: a current collector on the surface of the substrate; a first electrode on the current collector; a second electrode over the first electrode; and an electrolyte layer between the first electrode and the second electrode.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 14, 2010
    Applicant: APPLIED MATERIALS, INC.
    Inventors: BYUNG-SUNG LEO KWAK, Nety M. Krishna, Omkaram Nalamasu, Kaushal K. Singh, Steven Verhaverbeke
  • Publication number: 20100252108
    Abstract: Methods for fabrication of copper delafossite materials include a low temperature sol-gel process for synthesizing CuBO2 powders, and a pulsed laser deposition (PLD) process for forming thin films of CuBO2, using targets made of the CuBO2 powders. The CuBO2 thin films are optically transparent p-type semiconductor oxide thin films. Devices with CuBO2 thin films include p-type transparent thin film transistors (TTFT) comprising thin film CuBO2, as a channel layer and thin film solar cells with CuBO2 p-layers. Solid state dye sensitized solar cells (SS-DSSC) comprising CuBO2 in various forms, including “core-shell” and “nano-couple” particles, and methods of manufacture, are also described.
    Type: Application
    Filed: December 21, 2009
    Publication date: October 7, 2010
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Kaushal K. Singh, Omkaram Nalamasu, Nety M. Krishna, Michael Snure, Ashutosh Tiwari
  • Publication number: 20100249250
    Abstract: The invention provides the use of novel, binary guanosine gels for simple, rapid and nondestructive solubilization of individual single walled carbon nanotubes (SWNTs) at high concentrations. The gels exhibit selectivity between metallic and semiconducting SWNTs and, further, among SWNTs with different chiralities.
    Type: Application
    Filed: June 11, 2010
    Publication date: September 30, 2010
    Applicant: Rensselaer Polytechnic Institute
    Inventors: Linda McGown, Omkaram Nalamasu, Yuehua Yu
  • Publication number: 20100221606
    Abstract: A method of fabricating an energy storage device with a large surface area electrode comprises: providing an electrically conductive substrate; depositing a semiconductor layer on the electrically conductive substrate, the semiconductor layer being a first electrode; anodizing the semiconductor layer, wherein the anodization forms pores in the semiconductor layer, increasing the surface area of the first electrode; after the anodization, providing an electrolyte and a second electrode to form the energy storage device. The substrate may be a continuous film and the electrode of the energy storage device may be fabricated using linear processing tools. The semiconductor may be silicon and the deposition tool may be a thermal spray tool. Furthermore, the semiconductor layer may be amorphous. The energy storage device may be rolled into a cylindrical shape. The energy storage device may be a battery, a capacitor or an ultracapacitor.
    Type: Application
    Filed: March 2, 2009
    Publication date: September 2, 2010
    Inventors: Omkaram Nalamasu, Steven Verhaverbeke