Patents by Inventor Thomas Friedmann
Thomas Friedmann 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: 11675126Abstract: A hybrid photonic integrated circuit and a method of its manufacture are provided. A SiP functional layer is fabricated on an SOI wafer. A lithium niobate thin film is bonded to the SiP functional layer. The silicon handle layer is removed from the SOI wafer to expose buried oxide, and at least one III-V die is bonded to the exposed buried oxide. In embodiments, at least one waveguiding component is fabricated in the SiP functional layer. In embodiments, the SiP functional layer comprises a top waveguiding layer.Type: GrantFiled: April 5, 2021Date of Patent: June 13, 2023Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Ashok Kodigala, Anthony L. Lentine, Nicholas Boynton, Douglas Chandler Trotter, Thomas A. Friedmann, Phillip Harrison Weiner
-
Patent number: 11405014Abstract: The present invention relates to tunable microresonators, as well as methods of designing and tuning such resonators. In particular, tuning includes applying an electrical bias to the resonator, thereby shifting the resonant frequency.Type: GrantFiled: June 26, 2020Date of Patent: August 2, 2022Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Darren W. Branch, Christopher Nordquist, Matt Eichenfield, James Kenneth Douglas, Aleem Siddiqui, Thomas A. Friedmann
-
Patent number: 10788689Abstract: In an electro-optical modulator, an electro-optical modulation layer is bonded to a cladding layer that overlies a substrate. A modulation zone waveguide is optically coupled to the electro-optical modulation layer and optically coupled to an I/O waveguiding structure embedded in the cladding layer. The I/O waveguiding structure is conformed to guide input light toward the modulation zone waveguide and to guide output light away from the modulation zone waveguide.Type: GrantFiled: October 18, 2019Date of Patent: September 29, 2020Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Anthony L. Lentine, Christopher DeRose, Douglas Chandler Trotter, Thomas A. Friedmann, Michael Gehl, Nicholas Boynton
-
Patent number: 10666222Abstract: An amplifying radiofrequency device includes a piezoelectric film and a semiconductor amplifier layer. The piezoelectric film is conformed as an acoustic waveguide. The piezoelectric film has a principal acoustic propagation direction parallel to the principal conduction direction of the amplifier layer. Interdigitated transducers are positioned on the piezoelectric film to respectively launch an acoustic wave in response to an input RF signal, and transduce the acoustic wave back to an output RF signal. There is a distance of less than the acoustic wavelength between the semiconductor amplifier layer and the piezoelectric film. The piezoelectric film has a thickness of less than the acoustic wavelength. According to a method for making such a device, a stack of III-V layers is epitaxially grown on a III-V substrate, wherein the stack comprises a first etch stop layer, a second etch stop layer, an amplifier layer, and a contact layer. The stack is bonded to a lithium niobate film.Type: GrantFiled: September 28, 2017Date of Patent: May 26, 2020Inventors: Matt Eichenfield, Roy Olsson, Anna Tauke-Pedretti, Andrew Leenheer, Aleem Siddiqui, Thomas A. Friedmann
-
Patent number: 10473687Abstract: A microelectromechanical systems (MEMS) accelerometer that has high sensitivity to motion along the z axis is discussed. The device includes two symmetrical sets of bilateral, diametrically opposed high aspect ratio flexures that tether a movable proof mass to the frame of the device. The flexures are designed in such a way as to restrict movement of the proof mass along the x and y axes but readily allow motion along the z axis. More specifically, when the device experiences an acceleration along the x or y axes, the proof mass is restricted from moving because some of the bilateral, diametrically opposed flexures are in compression and others are in tension.Type: GrantFiled: May 12, 2017Date of Patent: November 12, 2019Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Paul J. Resnick, Brian D. Homeijer, Thomas A. Friedmann, Michael Wiwi
-
Patent number: 9865987Abstract: An optical second-harmonic generator (or spontaneous parametric down-converter) includes a microresonator formed of a nonlinear optical medium. The microresonator supports at least two modes that can be phase matched at different frequencies so that light can be converted between them: A first resonant mode having substantially radial polarization and a second resonant mode having substantially vertical polarization. The first and second modes have the same radial order. The thickness of the nonlinear medium is less than one-half the pump wavelength within the medium.Type: GrantFiled: June 5, 2017Date of Patent: January 9, 2018Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Matt Eichenfield, Jeremy Moore, Thomas A. Friedmann, Roy H. Olsson, Michael Wiwi, Camille Padilla, James Kenneth Douglas, Khalid Mikhiel Hattar
-
Patent number: 9641154Abstract: A single crystal micromechanical resonator includes a suspended plate of lithium niobate or lithium tantalate. The suspended plate and a support structure are formed from a single crystal.Type: GrantFiled: November 11, 2016Date of Patent: May 2, 2017Assignee: Sandia CorporationInventors: Roy H. Olsson, Thomas A. Friedmann, Sara Jensen Homeijer, Michael Wiwi, Khalid Mikhiel Hattar, Blythe Clark, Todd Bauer, Stuart B. Van Deusen
-
Publication number: 20170054432Abstract: The present invention relates to a single crystal micromechanical resonator. In particular, the resonator includes a lithium niobate or lithium tantalate suspended plate. Also provided are improved microfabrication methods of making resonators, which does not rely on complicated wafer bonding, layer fracturing, and mechanical polishing steps. Rather, the methods allow the resonator and its components to be formed from a single crystal.Type: ApplicationFiled: November 11, 2016Publication date: February 23, 2017Inventors: Roy H. Olsson, Thomas A. Friedmann, Sara Jensen Homeijer, Michael Wiwi, Khalid Mikhiel Hattar, Blythe Clark, Todd Bauer, Stuart B. Van Deusen
-
Patent number: 9525398Abstract: The present invention relates to a single crystal micromechanical resonator. In particular, the resonator includes a lithium niobate or lithium tantalate suspended plate. Also provided are improved microfabrication methods of making resonators, which does not rely on complicated wafer bonding, layer fracturing, and mechanical polishing steps. Rather, the methods allow the resonator and its components to be formed from a single crystal.Type: GrantFiled: May 27, 2014Date of Patent: December 20, 2016Assignee: Sandia CorporationInventors: Roy H. Olsson, Thomas A. Friedmann, Sara Jensen Homeijer, Michael Wiwi, Khalid Mikhiel Hattar, Blythe Clark, Todd Bauer, Stuart B. Van Deusen
-
Publication number: 20150322236Abstract: The invention relates to a composition, which comprises a chlorine containing thermoplastic polymer (PVC) as the substrate and a combination of a Fischer-Tropsch (FT)-wax with oxidized polyethylene wax.Type: ApplicationFiled: February 11, 2013Publication date: November 12, 2015Applicant: BASF SEInventors: Szilard CSIHONY, Yvonne HEISCHKEL, Rainer NOLTE, Michael NEUß, Bernd DUTTRA, Thomas FRIEDMANN
-
Publication number: 20060068019Abstract: A process for coating a polyunsaturated fatty acid (PUFA)-containing carrier particle or a PUFA matrix particle, or a liquid pharmaceutical-containing carrier particle or a liquid pharmaceutical matrix particle. Also disclosed are such particles made by the process of the invention and foods, pharmaceuticals, beverages, nutritional supplements, infant formula, pet food and animal feed with incorporate such particles.Type: ApplicationFiled: August 14, 2003Publication date: March 30, 2006Inventors: Sean Dalziel, Thomas Friedmann, George Schurr
-
Publication number: 20050255202Abstract: A process for encapsulating a solid food particle with a liquid encapsulating material comprising the steps of metering and encapsulation mixture (20) into a flow restrictor (14) concurrently a gas stream is introduced at inlet (22) into the flow restrictor there by atomizing the liquid encapsulating material and creating a turbulent flow zone at the outlet of the flow restrictor (14). Concomitant with metering the encapsulating material with the gas stream, solid food particulate (30) is introduced via hopper (28) to the turbulent zone at the outlet of the flow restrictor (14) wherein the solid food particles are encapsulating by the atomized encapsulating material, the encapsulated food particle inhibits environmental volatiles from diffusing into the food product while preventing oxidation of the food.Type: ApplicationFiled: August 14, 2003Publication date: November 17, 2005Inventors: Sean Dalziel, Thomas Friedmann, George Schurr
-
Publication number: 20050233074Abstract: A process of manufacturing compositions comprised of carrier particles under 100 nm that have been loaded to a level of greater than 60% by weight with a liquid. The highly-liquid-loaded particles can be further coated or encapsulated with functional coating or encapsulating materials.Type: ApplicationFiled: August 14, 2003Publication date: October 20, 2005Inventors: Sean Dalziel, Prathibha Gai, Thomas Friedmann, Qian Zhao, George Schurr
-
Publication number: 20050220996Abstract: A process of coating to create pharmaceutical particles is disclosed. The coating can enhance the pharmaceutical particle by providing a controlled release barrier, moisture barrier, surface modifying agent, wetting agent, flowability or fluidizing agent, hydrophobicity or hydrophilicity agent, flavor masking agent, odor masking agent, release control agent, or coloring agent; or an inert particle can be coated with a pharmaceutically active liquid. Also disclosed are coated pharmaceutical particles made by one of the processes of the invention.Type: ApplicationFiled: August 14, 2003Publication date: October 6, 2005Inventors: Larry Berger, Nutan Gangrade, Qian Zhao, Sean Dalziel, George Schurr, Thomas Friedmann, Torence Trout Jr.
-
Publication number: 20050202095Abstract: The present invention relates to the use of a high intensity, in-line rotor-stator apparatus to produce fine particles via antisolvent, reactive, salting out or rapid cooling precipitation and crystallization.Type: ApplicationFiled: May 23, 2005Publication date: September 15, 2005Inventors: Sean Daiziel, Erik Henricus Gommeren, Richard Calabrese, Thomas Friedmann
-
Patent number: 6103305Abstract: A stress-relieved amorphous-diamond film is formed by depositing an amorphous diamond film with specific atomic structure and bonding on to a substrate, and annealing the film at sufficiently high temperature to relieve the compressive stress in said film without significantly softening said film. The maximum annealing temperature is preferably on the order of 650.degree. C., a much lower value than is expected from the annealing behavior of other materials.Type: GrantFiled: November 23, 1999Date of Patent: August 15, 2000Assignee: Sandia CorporationInventors: Thomas A. Friedmann, John P. Sullivan
-
Patent number: 5935639Abstract: A novel field emitter device for cold cathode field emission applications, comprising a multi-layer resistive carbon film.The multi-layered film of the present invention is comprised of at least two layers of a resistive carbon material, preferably amorphous-tetrahedrally coordinated carbon, such that the resistivities of adjacent layers differ. For electron emission from the surface, the preferred structure comprises a top layer having a lower resistivity than the bottom layer. For edge emitting structures, the preferred structure of the film comprises a plurality of carbon layers, wherein adjacent layers have different resistivities. Through selection of deposition conditions, including the energy of the depositing carbon species, the presence or absence of certain elements such as H, N, inert gases or boron, carbon layers having desired resistivities can be produced.Type: GrantFiled: January 20, 1998Date of Patent: August 10, 1999Assignee: Sandia CorporationInventors: John P. Sullivan, Thomas A. Friedmann
-
Patent number: 5821680Abstract: A multi-layer resistive carbon film field emitter device for cold cathode field emission applications. The multi-layered film of the present invention consists of at least two layers of a conductive carbon material, preferably amorphous-tetrahedrally coordinated carbon, where the resistivities of adjacent layers differ. For electron emission from the surface, the preferred structure can be a top layer having a lower resistivity than the bottom layer. For edge emitting structures, the preferred structure of the film can be a plurality of carbon layers, where adjacent layers have different resistivities. Through selection of deposition conditions, including the energy of the depositing carbon species, the presence or absence of certain elements such as H, N, inert gases or boron, carbon layers having desired resistivities can be produced.Type: GrantFiled: October 17, 1996Date of Patent: October 13, 1998Assignee: Sandia CorporationInventors: John P. Sullivan, Thomas A. Friedmann