Patents by Inventor Oki Gunawan

Oki Gunawan 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: 20210025918
    Abstract: A technique relates to a magnetic device and a diamagnetic material positioned to levitate at a three-dimensional minimum of a potential well generated by a magnetic field of the magnetic device.
    Type: Application
    Filed: July 24, 2019
    Publication date: January 28, 2021
    Inventors: Bruce Gordon Elmegreen, Oki Gunawan
  • Publication number: 20200398678
    Abstract: Magnetic levitation transport using a parallel dipole line track system is provided. In one aspect, a magnetic levitation transport system includes: a dipole line track system having: i) multiple segments joined together, each of the multiple segments having at least two diametric magnets, and ii) at least one diamagnetic object levitating above the at least two diametric magnets. A method for operating a magnetic levitation transport system is also provided.
    Type: Application
    Filed: September 8, 2020
    Publication date: December 24, 2020
    Inventor: Oki Gunawan
  • Patent number: 10833326
    Abstract: Low-voltage rechargeable microbatteries having a vanadium-based cathode are provided. In one aspect, a method of forming a battery is provided. The method includes the steps of: forming a first contact on a substrate; forming a cathode on the first contact, wherein the cathode is formed from a vanadium-containing material; forming a solid electrolyte on the cathode; forming an anode on the solid electrolyte; and forming a second contact on the anode. A battery having a vanadium-based cathode is also provided.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: November 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: Kevin W. Brew, Oki Gunawan, Saurabh Singh, Teodor K. Todorov
  • Patent number: 10831995
    Abstract: A dimensionality analysis method, system, and computer program product, include defining a set of symbols along with a grammatical rule that define a syntax of a valid expression having a valid physical dimensionality relationship.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: November 10, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Oki Gunawan, Lior Horesh, Giacomo Nannicini, Wang Zhou
  • Patent number: 10818976
    Abstract: A lithium rechargeable lithium battery including a conductive substrate, a cathode material layer disposed over the conductive substrate, a solid electrolyte material layer disposed over the cathode material layer, an anode material layer disposed over the solid electrolyte material layer, and a conductive layer disposed over the anode material layer.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: October 27, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kevin W. Brew, Oki Gunawan, Singh Saurabh, Teodor K. Todorov
  • Publication number: 20200326306
    Abstract: Systems and methods are provided that facilitate high-sensitivity, carrier-resolved photo-Hall effect measurements. Majority and minority carrier properties can be measured and determined simultaneously. In one aspect, a system and method determine majority carrier type, density and mobility and, with modulated illumination, minority carrier mobility and photocarrier density. In another aspect, a system and method can determine hole and electron mobility, photocarrier density, absorbed photon density, recombination lifetime and diffusion length for hole, electron and ambipolar transport.
    Type: Application
    Filed: April 12, 2019
    Publication date: October 15, 2020
    Inventors: Oki Gunawan, Wang Zhou
  • Patent number: 10800268
    Abstract: Magnetic levitation transport using a parallel dipole line track system is provided. In one aspect, a magnetic levitation transport system includes: a dipole line track system having: i) multiple segments joined together, each of the multiple segments having at least two diametric magnets, and ii) at least one diamagnetic object levitating above the at least two diametric magnets. A method for operating a magnetic levitation transport system is also provided.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: October 13, 2020
    Assignee: International Business Machines Corporation
    Inventor: Oki Gunawan
  • Publication number: 20200286655
    Abstract: Techniques regarding operating one or more parallel dipole line traps are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a parallel dipole line trap comprising a diamagnetic object positioned between a plurality of dipole line magnets. The system can also comprise a split photodetector sensor positioned adjacent to the parallel dipole line trap. The split photodetector sensor can detect a displacement of the diamagnetic object.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 10, 2020
    Inventors: Oki Gunawan, Wang Zhou
  • Publication number: 20200150298
    Abstract: Parallel dipole line (PDL) trap seismometer and vibration sensors are provided. In one aspect of the invention, a seismometer is provided. The seismometer includes: at least one PDL trap having a pair of dipole line magnets, and a diamagnetic object levitating above the dipole line magnets; and a sensing system (passive or active sensing) for determining a position of the diamagnetic object relative to the dipole line magnets and to yield the seismic signal in terms of displacement or acceleration. Methods for sensing vibrations using the present PDL trap seismometer and vibration sensors are also provided.
    Type: Application
    Filed: January 20, 2020
    Publication date: May 14, 2020
    Inventors: Oki Gunawan, Yudistira Virgus
  • Publication number: 20200152815
    Abstract: Improved high work function back contacts for solar cells are provided. In one aspect, a method of forming a solar cell includes: forming a completed solar cell having a substrate coated with an electrically conductive material, an absorber disposed on the electrically conductive material, a buffer layer disposed on the absorber, a transparent front contact disposed on the buffer layer, and a metal grid disposed on the transparent front contact; removing the substrate and the electrically conductive material using exfoliation, exposing a backside surface of the solar cell; depositing a high work function material onto the back side surface of the solar cell; and depositing a back contact onto the high work function material. A solar cell formed by the present techniques is also provided. Yield of the exfoliated device can be improved by removing bubbles from adhesive used for exfoliation and/or forming contact pads to access the metal grid.
    Type: Application
    Filed: January 13, 2020
    Publication date: May 14, 2020
    Inventors: Priscilla D. Antunez, Douglas M. Bishop, Gloria W. Fraczak, Oki Gunawan, Richard A. Haight
  • Publication number: 20200134259
    Abstract: A dimensionality analysis method, system, and computer program product, include conducting a search that determines which valid expressions in a data set satisfies a defined free-form grammar that describes the data set.
    Type: Application
    Filed: December 30, 2019
    Publication date: April 30, 2020
    Inventors: Oki Gunawan, Lior Horesh, Giacomo Nannicini, Wang Zhou
  • Patent number: 10627330
    Abstract: Techniques for gas analysis using a parallel dipole line (PDL) trap viscometer are provided. In one aspect, a gas analysis system is provided which includes: a PDL trap including: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the magnets; and a motion detector for capturing motion of the diamagnetic rod. The motion detector can include a digital video camera positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod and the system can include a computer for receiving and analyzing video images from the video camera. Methods for measuring gas viscosity and pressure using the PDL trap system are also provided.
    Type: Grant
    Filed: July 7, 2018
    Date of Patent: April 21, 2020
    Assignee: International Business Machines Corporation
    Inventors: Oki Gunawan, Yudistira Virgus
  • Patent number: 10613249
    Abstract: A highly sensitive gravimeter using a magnetic parallel dipole line (PDL) trap system is provided. In one aspect, a gravimeter includes: a vacuum enclosure; a PDL trap within the vacuum enclosure, the PDL trap having a pair of dipole line magnets, and a diamagnetic rod levitating in between the dipole line magnets; and a heater and temperature sensor within the vacuum enclosure configured to maintain a constant temperature within the vacuum enclosure that is greater than a temperature outside of the vacuum enclosure and precision frequency measurement system. The frequency of the oscillation of the trapped diamagnetic rod will yield the local gravitational acceleration. Methods for measuring a local gravitational field using the present gravimeter are also provided.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: April 7, 2020
    Assignee: International Business Machines Corporation
    Inventors: Oki Gunawan, Hendrik F. Hamann, Wang Zhou
  • Publication number: 20200105964
    Abstract: A photovoltaic device includes an absorber layer having a back contact formed on the absorber layer, the back contact having an exposed surface free from a substrate. It further includes a top contact formed in contact with a transparent conductive layer opposite the back contact and a stressor layer forming a superstrate on the absorber layer opposite the back contact.
    Type: Application
    Filed: December 3, 2019
    Publication date: April 2, 2020
    Inventors: Oki Gunawan, Homare Hiroi, Jeehwan Kim, David B. Mitzi, Hiroki Sugimoto
  • Patent number: 10599766
    Abstract: A dimensionality analysis method, system, and computer program product, include defining a grammar that describes an admissible relationship between quantities in a data set, discovering symbolic expressions that intrinsically account for a dimensionality analysis based on the grammar, conducting a search that determines which valid expression in the data set satisfy the grammar, and selecting the expression that fits the dataset and minimizes a measure of a complexity of the expression.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: March 24, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Oki Gunawan, Lior Horesh, Giacomo Nannicini, Wang Zhou
  • Patent number: 10593456
    Abstract: A motor-actuator device using a PDL trap system is provided. In one aspect, a motor-actuator device includes: a PDL trap having a pair of diametric magnets, and a levitated diamagnetic rotor in between the diametric magnets, wherein at least a portion of the diamagnetic rotor has a rectangular shape; and an electrode shell having at least one pair of semicircular electrodes which surround, but are in a non-contact position with the levitated diamagnetic rotor and each other. A system including the motor-actuator device and an electrode driver circuit is also provided, as is a method of operating the motor-actuator device.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: March 17, 2020
    Assignee: International Business Machines Corporation
    Inventor: Oki Gunawan
  • Patent number: 10585026
    Abstract: Techniques for gas analysis using a parallel dipole line (PDL) trap viscometer are provided. In one aspect, a gas analysis system is provided which includes: a PDL trap including: a pair of diametric cylindrical magnets, and a diamagnetic rod levitating above the magnets; and a motion detector for capturing motion of the diamagnetic rod. The motion detector can include a digital video camera positioned facing a top of the PDL trap so as to permit capturing video images of the diamagnetic rod and the system can include a computer for receiving and analyzing video images from the video camera. Methods for measuring gas viscosity and pressure using the PDL trap system are also provided.
    Type: Grant
    Filed: July 7, 2018
    Date of Patent: March 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: Oki Gunawan, Yudistira Virgus
  • Patent number: 10584966
    Abstract: Inclinometers with a parallel dipole line (PDL) trap system are provided. In one aspect, an inclinometer includes: a PDL trap having a pair of dipole line magnets, a transparent tube in between the dipole line magnets, and a diamagnetic object within the transparent tube, wherein the diamagnetic object is levitating in between the dipole line magnets; and a sensing system for determining a position z of the diamagnetic object in the PDL trap and for determining an inclination angle ? using the position z of the diamagnetic object in the PDL trap. Techniques to detect the diamagnetic object position using optical, capacitive and manual methods are described. A method for determining an inclination angle ? using the present inclinometers is also provided.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: March 10, 2020
    Assignee: International Business Machines Corporation
    Inventor: Oki Gunawan
  • Patent number: 10580928
    Abstract: A method for thermal exfoliation includes providing a target layer on a substrate to form a structure. A stressor layer is deposited on the target layer. The structure is placed in a temperature controlled environment to induce differential thermal expansion between the target layer and the substrate. The target layer is exfoliated from the substrate when a critical temperature is achieved such that the target layer is separated from the substrate to produce a standalone, thin film device.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: March 3, 2020
    Assignees: International Business Machines Corporation, Solar Frontier K.K.
    Inventors: Oki Gunawan, Homare Hiroi, Jeehwan Kim, David B. Mitzi, Hiroki Sugimoto
  • Patent number: 10573814
    Abstract: Vacuum annealing-based techniques for forming perovskite materials are provided. In one aspect, a method of forming a perovskite material is provided. The method includes the steps of: depositing a metal halide layer on a sample substrate; and vacuum annealing the metal halide layer and methylammonium halide under conditions sufficient to form methylammonium halide vapor which reacts with the metal halide layer and forms the perovskite material on the sample substrate. A perovskite-based photovoltaic device and method of formation thereof are also provided.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: February 25, 2020
    Assignee: International Business Machines Corporation
    Inventors: Talia S. Gershon, Supratik Guha, Oki Gunawan, Teodor K. Todorov