Patents by Inventor Petra Majewski

Petra Majewski 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: 8742387
    Abstract: An integrated circuit includes a memory cell with a resistance changing memory element. The resistance changing memory element includes a first electrode, a second electrode, and a resistivity changing material disposed between the first and second electrodes, where the resistivity changing material is configured to change resistive states in response to application of a voltage or current to the first and second electrodes. In addition, at least one of the first electrode and the second electrode comprises an insulator material including a self-assembled electrically conductive element formed within the insulator material. The self-assembled electrically conductive element formed within the insulator material remains stable throughout the operation of switching the resistivity changing material to different resistive states.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: June 3, 2014
    Assignee: Qimonda AG
    Inventors: Thomas Happ, Franz Kreupl, Jan Boris Philipp, Petra Majewski
  • Patent number: 8305793
    Abstract: An integrated circuit includes an array of resistance changing memory cells, and a circuit configured to apply an initialization signal to a first one of the memory cells that is in a virgin resistance state. The initialization signal is configured to modify the first memory cell without switching an operation state of the first memory cell.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: November 6, 2012
    Assignee: Qimonda AG
    Inventors: Petra Majewski, Jan Boris Philipp
  • 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
  • Patent number: 8009468
    Abstract: A method for fabricating an integrated circuit, the method comprises forming a first electrode, depositing resistance changing material over the first electrode, the resistance changing material having an active zone for switching the resistance of the resistance changing material and an inactive zone, and forming a second electrode over the resistance changing material. The chemical composition of the resistance changing material in the active zone differs from the chemical composition of the resistance changing material in the inactive zone.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: August 30, 2011
    Assignee: Qimonda AG
    Inventors: Dieter Andres, Thomas Happ, Petra Majewski, Bernhard Ruf
  • Patent number: 7939817
    Abstract: An integrated circuit includes a heater element serving as a first electrode, a second electrode, a memory element comprising resistance changing material coupled to the heater element and to the second electrode, and a diffusion compensation region coupled to the heater element and to the resistance changing material. The diffusion compensation region includes a surplus of at least one diffusible species present in the memory element and provides at least one diffusible species to the memory element.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: May 10, 2011
    Assignee: Qimonda AG
    Inventors: Dieter Andres, Thomas Happ, Petra Majewski, Bernhard Ruf
  • Publication number: 20100084741
    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: Application
    Filed: October 8, 2008
    Publication date: April 8, 2010
    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
  • Patent number: 7646632
    Abstract: An integrated circuit includes an array of resistance changing memory cells and a first circuit. The first circuit is configured to set a selected memory cell to a crystalline state by applying a decreasing stair step pulse to the selected memory cell. The pulse is based on a reset current distribution for the array of memory cells.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: January 12, 2010
    Assignee: Qimonda AG
    Inventors: Jan Boris Philipp, Thomas Happ, Bernhard Ruf, Christian RĂ¼ster, Dieter Andres, Petra Majewski
  • Publication number: 20090321706
    Abstract: An integrated circuit includes a memory cell with a resistance changing memory element. The resistance changing memory element includes a first electrode, a second electrode, and a resistivity changing material disposed between the first and second electrodes, where the resistivity changing material is configured to change resistive states in response to application of a voltage or current to the first and second electrodes. In addition, at least one of the first electrode and the second electrode comprises an insulator material including a self-assembled electrically conductive element formed within the insulator material. The self-assembled electrically conductive element formed within the insulator material remains stable throughout the operation of switching the resistivity changing material to different resistive states.
    Type: Application
    Filed: June 25, 2008
    Publication date: December 31, 2009
    Applicant: QIMONDA AG
    Inventors: Thomas Happ, Franz Kreupl, Jan Boris Philipp, Petra Majewski
  • Publication number: 20090285007
    Abstract: An integrated circuit includes an array of resistance changing memory cells, and a circuit configured to apply an initialization signal to a first one of the memory cells that is in a virgin resistance state. The initialization signal is configured to modify the first memory cell without switching an operation state of the first memory cell.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 19, 2009
    Inventors: Petra Majewski, Jan Boris Philipp
  • Publication number: 20090285014
    Abstract: An integrated circuit and method for switching a resistively switching memory cell. One embodiment provides an initial pulse and at least one escalated pulse in case the memory cell did not switch.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Applicant: Qimonda AG
    Inventors: Petra Majewski, Jan Boris Philipp
  • Publication number: 20090161415
    Abstract: An integrated circuit includes an array of resistance changing memory cells and a first circuit. The first circuit is configured to set a selected memory cell to a crystalline state by applying a decreasing stair step pulse to the selected memory cell. The pulse is based on a reset current distribution for the array of memory cells.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 25, 2009
    Applicant: Qimonda AG
    Inventors: Jan Boris Philipp, Thomas Happ, Bernhard Ruf, Christian Ruster, Dieter Andres, Petra Majewski
  • Publication number: 20090050870
    Abstract: An integrated circuit includes a heater element serving as a first electrode, a second electrode, a memory element comprising resistance changing material coupled to the heater element and to the second electrode, and a diffusion compensation region coupled to the heater element and to the resistance changing material. The diffusion compensation region includes a surplus of at least one diffusible species present in the memory element and provides at least one diffusible species to the memory element.
    Type: Application
    Filed: July 3, 2008
    Publication date: February 26, 2009
    Applicant: QIMONDA AG
    Inventors: Dieter Andres, Thomas Happ, Petra Majewski, Bernhard Ruf
  • Publication number: 20090052232
    Abstract: A method for fabricating an integrated circuit, the method comprises forming a first electrode, depositing resistance changing material over the first electrode, the resistance changing material having an active zone for switching the resistance of the resistance changing material and an inactive zone, and forming a second electrode over the resistance changing material.
    Type: Application
    Filed: July 3, 2008
    Publication date: February 26, 2009
    Applicant: QIMONDA AG
    Inventors: Dieter Andres, Thomas Happ, Petra Majewski, Bernhard Ruf