Gunn-effect Devices Or Transferred Electron Devices (epo) Patents (Class 257/E47.002)
  • Patent number: 11615842
    Abstract: An embodiment in the application may include an analog memory structure, and methods of writing to such a structure, including a volatile memory element in series with a non-volatile memory element. The analog memory structure may change resistance upon application of a voltage. This may enable accelerated writing of the analog memory structure.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: March 28, 2023
    Assignee: International Business Machines Corporation
    Inventors: Kevin W. Brew, Wei Wang, Injo Ok, Lan Yu, Youngseok Kim
  • Patent number: 11362275
    Abstract: Exemplary methods of forming a memory structure may include forming a layer of a transition-metal-and-oxygen-containing material overlying a substrate. The substrate may include a first electrode material. The methods may include annealing the transition-metal-and-oxygen-containing material at a temperature greater than or about 500° C. The annealing may occur for a time period less than or about one second. The methods may also include, subsequent the annealing, forming a layer of a second electrode material over the transition-metal-and-oxygen-containing material.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: June 14, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Nicolas Louis Gabriel Breil, Siddarth Krishnan, Shashank Sharma, Ria Someshwar, Kai Ng, Deepak Kamalanathan
  • Patent number: 8754392
    Abstract: One embodiment of the disclosure can provide a storage layer of a resistive memory element comprising a resistance changeable material. The resistance changeable material can include carbon. Contact layers can be provided for contacting the storage layer. The storage layer can be disposed between a bottom contact layer and a top contact layer. The resistance changeable material can be annealed at a predetermined temperature over a predetermined annealing time for rearranging an atomic order of the resistance changeable material.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: June 17, 2014
    Assignee: International Business Machines Corporation
    Inventors: Daniele Caimi, Evangelos S. Eleftheriou, Charalampos Pozidis, Christophe P. Rossel, Abu Sebastian
  • Patent number: 8604456
    Abstract: Provided is a nonvolatile memory device including a phase-change memory configured with cross-point memory cells in which memory elements formed of a phase-change material and selection elements formed with a diode are combined. A memory cell is configured with a memory element formed of a phase-change material and a selection element formed with a diode having a stacked structure of a first polycrystalline silicon film, a second polycrystalline silicon film, and a third polycrystalline silicon film. The memory cells are arranged at intersection points of a plurality of first metal wirings extending along a first direction with a plurality of third metal wirings extending along a second direction orthogonal to the first direction. An interlayer film is formed between adjacent selection elements and between adjacent memory elements, and voids are formed in the interlayer film provided between the adjacent memory elements.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: December 10, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masaharu Kinoshita, Yoshitaka Sasago, Norikatsu Takaura
  • Patent number: 8501525
    Abstract: A method of fabricating a programmable memory microelectronic device includes depositing onto a first electrode an intermediate layer of a material having a chalcogenide; depositing an ionizable metallic layer on the intermediate layer; irradiating with ultraviolet radiation the ionizable metallic layer so that metallic ions from the ionizable metallic layer diffuse into the intermediate layer to form a chalcogenide material containing metallic ions, and depositing a second electrode on the layer of chalcogenide material containing metallic ions obtained in the prior step. The second and third steps are repeated at least n times, where n is an integer greater than or equal to 1. The ionizable metallic layer deposited during the second step has a sufficiently small thickness that the metallic ions may be diffused totally during the irradiation (third) step.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: August 6, 2013
    Assignee: Altis Semiconductor
    Inventor: Faiz Dahmani
  • Patent number: 8502185
    Abstract: A switching device includes a substrate; a first electrode formed over the substrate; a second electrode formed over the first electrode; a switching medium disposed between the first and second electrode; and a nonlinear element disposed between the first and second electrodes and electrically coupled in series to the first electrode and the switching medium. The nonlinear element is configured to change from a first resistance state to a second resistance state on application of a voltage greater than a threshold.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 6, 2013
    Assignee: Crossbar, Inc.
    Inventors: Wei Lu, Sung Hyun Jo
  • Patent number: 8207503
    Abstract: A detector of periodic packets of X photons, each packet having a duration shorter than 0.1 nanosecond, comprising a sensor comprising a semiconductor element of type III-V biased in a negative differential resistance region, said sensor being arranged in a resonant cavity tuned to a multiple of the packet repetition frequency.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: June 26, 2012
    Assignee: European Synchrotron Radiation Facility
    Inventors: José Goulon, Gérard Goujon, Andrei Rogalev, Fabrice Wilhelm
  • Publication number: 20120001148
    Abstract: A resistance-change memory device using stress engineering is described, including a first layer including a first conductive electrode, a second layer above the first layer including a resistive-switching element, a third layer above the second layer including a second conductive electrode, where a first stress is created in the switching element at a first interface between the first layer and the second layer upon heating the memory element, and where a second stress is created in the switching element at a second interface between the second layer and the third layer upon the heating.
    Type: Application
    Filed: September 15, 2011
    Publication date: January 5, 2012
    Applicant: INTERMOLECULAR, INC.
    Inventors: Michael Miller, Prashant Phatak, Tony Chiang
  • Patent number: 8063394
    Abstract: According to an embodiment, an integrated circuit including a plurality of resistance changing memory cells is disclosed. Each memory cell includes a first electrode, a second electrode and resistance changing memory element arranged between the first electrode and the second electrode. A front surface area of an end section of the first electrode that faces the resistance changing memory element is smaller than a front surface area of an end section of the second electrode that faces the resistance changing memory element.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: November 22, 2011
    Assignee: Qimonda AG
    Inventors: Dieter Andres, Rainer Bruchhaus, Ulrike Gruening-Von Schwerin, Ulrich Klostermann, Franz Kreupl, Michael Kund, Petra Majewski, Christian Ruester, Bernhard Ruf, Ralf Symanczyk, Klaus-Dieter Ufert
  • Publication number: 20110235408
    Abstract: For decreasing a recording current and suppressing a cross erase simultaneously, a three-dimensional phase-change memory for attaining higher sensitivity and higher reliability by the provision of a chalcogenide type interface layer is provided, in which an electric resistivity, a thermal conductivity, and a melting point of the material of the interface layer are selected appropriately, thereby improving the current concentration to the phase-change material and thermal and material insulation property with Si channel upon writing.
    Type: Application
    Filed: January 8, 2011
    Publication date: September 29, 2011
    Inventors: Hiroyuki MINEMURA, Yumiko Anzai, Takahiro Morikawa, Toshimichi Shintani, Yoshitaka Sasago
  • Publication number: 20100219821
    Abstract: A complimentary metal oxide semiconductor (CMOS) sensor system in one embodiment includes a doped well extending along a first axis of a doped substrate, a first electrical contact positioned within the doped well, a second electrical contact positioned within the doped well and spaced apart from the first electrical contact along the first axis, a third electrical contact positioned within the doped well and located between the first electrical contact and the second electrical contact along the first axis, and a fourth electrical contact electrically coupled to the doped well at a location of the doped well below the third electrical contact.
    Type: Application
    Filed: March 2, 2009
    Publication date: September 2, 2010
    Applicant: ROBERT BOSCH GMBH
    Inventors: Thomas Rocznik, Christoph Lang, Sam Kavusi
  • Publication number: 20090230331
    Abstract: A device comprising a two-dimensional electron gas that includes an active region located in a portion of the electron gas is disclosed. The active region comprises an electron concentration less than an electron concentration of a set of non-active regions of the electron gas. The device includes a controlling terminal located on a first side of the active region. The device can comprise, for example, a field effect transistor (FET) in which the gate is located and used to control the carrier injection into the active region and define the boundary condition for the electric field distribution within the active region. The device can be used to generate, amplify, filter, and/or detect electromagnetic radiation of radio frequency (RF) and/or terahertz (THz) frequencies.
    Type: Application
    Filed: March 12, 2009
    Publication date: September 17, 2009
    Inventors: Alexei Koudymov, Michael Shur, Remigijus Gaska
  • Publication number: 20080078985
    Abstract: Non-volatile resistance change memories, systems, arrangements and associated methods are implemented in a variety of embodiments. According to one embodiment, a memory cell having two sections with outwardly-facing portions, the outwardly-facing portions electrically coupled to electrodes is implemented. The memory cell has an ionic barrier between the two sections. The two sections and the ionic barrier facilitate movement of ions from one of the two sections to the other of the two sections in response to a first voltage differential across the outwardly-facing portions. The two sections and the ionic barrier diminish movement of ions from the one of the two sections to the other of the two sections in response to another voltage differential across the outwardly-facing portions.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 3, 2008
    Inventors: Rene Meyer, Paul McIntyre