Patents by Inventor Siegfried F. Karg

Siegfried F. Karg 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: 8242353
    Abstract: A solar cell includes a substrate layer and a plurality of nanowires grown outwardly from the substrate layer, at least two of the nanowires including a plurality of sub-cells. The solar cell also includes one or more light guiding layers formed of a transparent, light scattering material and filling the area between the plurality of nanowires.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: August 14, 2012
    Assignee: International Business Machines Corporation
    Inventor: Siegfried F. Karg
  • Patent number: 8212269
    Abstract: The present invention is directed to an organic light emitting device (OLED) including a first electrode, a second electrode, at least one layer of organic material arranged between the first electrode and the second electrode, and a dielectric capping layer arranged on the second electrode opposite to the first electrode, wherein the capping layer comprises an outer surface, opposite to the second electrode, for emission of light generated in the at least one layer of organic material. The capping layer has the effect that a reflectance of external light is reduced whereas outcoupling of the light generated in the at least one layer of organic material through the capping layer is increased.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: July 3, 2012
    Assignee: International Business Machines Corporation
    Inventors: Siegfried F. Karg, Hajime Nakamura, Heike E. Riel, Walter H. Riess, Constance Rost-Bietsch
  • Patent number: 8159855
    Abstract: A switchable element. The element includes a source electrode, a drain electrode, a conducting channel between the source electrode and the drain electrode, and a gate with multiferroic material being switchable, by application of an electrical signal to the gate, between a first switching state with a first spontaneous polarization direction and a second switching state with a second spontaneous polarization direction. The conducting channel is magnetoresistive, and a magnetic field strength at the conducting channel in the first switching state is different than a magnetic field strength in the second switching state, whereby a current-voltage characteristic of the conducting channel is dependent on the switching state of the multiferroic material.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: April 17, 2012
    Assignee: International Business Machines Corporation
    Inventors: Gerhard Ingmar Meijier, Siegfried F Karg
  • Patent number: 8129763
    Abstract: A MOS device includes first and second source/drains spaced apart relative to one another. A channel is formed in the device between the first and second source/drains. A gate is formed in the device between the first and second source/drains and proximate the channel, the gate being electrically isolated from the first and second source/drains and the channel. The gate is configured to control a conduction of the channel as a function of a potential applied to the gate. The MOS device further includes an energy filter formed between the first source/drain and the channel. The energy filter includes a superlattice structure wherein a mini-band is formed. The energy filter is operative to control an injection of carriers from the first source/drain into the channel. The energy filter, in combination with the first source/drain, is configured to produce an effective zero-Kelvin first source/drain.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: March 6, 2012
    Assignee: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Riel, Walter H. Riess, Heinz Schmid
  • Patent number: 8053037
    Abstract: A device for patterning structures on a substrate includes an imaging device having a scanning tip, a light emitting device, and a space around the scanning tip. The space comprises a vapor of a material which is suitable for Chemical Vapor Deposition onto the substrate when decomposed. The light emitting device is adapted to emit a light beam, which has an intensity not capable to decompose the vapor, onto the scanning tip in such a way that an electromagnetic field induced by the light beam near the scanning tip is high enough to decompose the vapor.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: November 8, 2011
    Assignee: International Business Machines Corporation
    Inventors: Siegfried F. Karg, Roland Germann, Heike E. Riel, Walter Heinrich Riess, Reto Schlittler
  • Patent number: 8049207
    Abstract: A method for manufacturing an organic electronic device including a stack of layers including a release layer, the stack having a lateral structure on a substrate, at least one of the layers being an organic material layer. A method includes with the step of providing a stamp with at least one protrusion of the surface area corresponding to the lateral structure. The stack of layers is deposited with a first face on the surface area of the protrusion of the stamp. A second face of the stack that is opposite to the first face is brought into adhesive contact with the substrate. The stamp is released from the stack.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: November 1, 2011
    Assignee: International Business Machines Corporation
    Inventors: Siegfried F. Karg, Bruno Michel, Heike E. Riel, Walter H. Riess
  • Patent number: 8022447
    Abstract: A MOS device includes first and second source/drains spaced apart relative to one another. A channel is formed in the device between the first and second source/drains. A gate is formed in the device between the first and second source/drains and proximate the channel, the gate being electrically isolated from the first and second source/drains and the channel. The gate is configured to control a conduction of the channel as a function of a potential applied to the gate. The MOS device further includes an energy filter formed between the first source/drain and the channel. The energy filter includes an impurity band operative to control an injection of carriers from the first source/drain into the channel.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: September 20, 2011
    Assignee: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Riel, Walter H. Riess, Heinz Schmid
  • Patent number: 8021710
    Abstract: The present invention relates to methods and apparatus for producing an electronic device, such as an organic light-emitting diode (OLED), having an electrode with enhanced injection properties. An example method according to the invention comprises the steps of providing an electrode, depositing a first layer of molecular charge transfer material on the electrode, and cross-linking the molecular charge transfer material. With the method according to the invention, an OLED with higher light efficiency, lower operating voltage, and longer lifetime can be produced. The present invention further relates to an electronic device having an electrode with enhanced injection properties.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: September 20, 2011
    Assignee: International Business Machines Corporation
    Inventors: Thomas Brunschwiler, Siegfried F. Karg, Walter Riess
  • Publication number: 20110049474
    Abstract: An indirectly induced tunnel emitter for a tunneling field effect transistor (TFET) structure includes an outer sheath that at least partially surrounds an elongated core element, the elongated core element formed from a first semiconductor material; an insulator layer disposed between the outer sheath and the core element; the outer sheath disposed at a location corresponding to a source region of the TFET structure; and a source contact that shorts the outer sheath to the core element; wherein the outer sheath is configured to introduce a carrier concentration in the source region of the core element sufficient for tunneling into a channel region of the TFET structure during an on state.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Reil, Walter H. Riess, Paul M. Solomon
  • Patent number: 7872901
    Abstract: A memory cell (10) includes a resistive structure (1), and at least two electrodes (2) coupled to the resistive structure (1), wherein: the resistive structure (1) includes hydrogen, and the resistive structure (1) includes a material that exhibits a hydrogen ion mobility value of at least 10?8cm2/Vs.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: January 18, 2011
    Assignee: International Business Machines Corporation
    Inventors: Johannes Georg Bednorz, Siegfried F. Karg, Gerhard Ingmar Meijer
  • Publication number: 20100308316
    Abstract: An electronic device having an electrode with enhanced injection properties comprising a first electrode and a first layer of cross-linked molecular charge transfer material on the first electrode. The cross-linked molecular charge transfer material may be an acceptor, which may consist of at least one of: TNF, TN9(CN)2F, TeNF, TeCIBQ, TCNB, DCNQ, and TCAQ. The cross-linked molecular charge transfer material may also be a donor, which may consist of at least one of: Terpy, Ru(terpy)2 TTN, and crystal violet.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 9, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Thomas Brunschwiler, Siegfried F. Karg, Walter Riess
  • Patent number: 7834339
    Abstract: The present invention relates to a memory cell comprising: a resistive structure; at least two electrodes coupled to the resistive structure, and at least one hydrogen reservoir structure, wherein the application of an electrical signal to one of the at least two electrodes causes the electrical resistance of the resistive structure to be modified by altering a hydrogen-ion concentration in the resistive structure.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: November 16, 2010
    Assignee: International Business Machines Corporation
    Inventors: Johannes G. Bednorz, Eric A. Joseph, Siegfried F. Karg, Chung H. Lam, Gerhard I. Meijer, Alejandro G. Schrott
  • Publication number: 20100195381
    Abstract: A switchable element. The element includes a source electrode, a drain electrode, a conducting channel between the source electrode and the drain electrode, and a gate with multiferroic material being switchable, by application of an electrical signal to the gate, between a first switching state with a first spontaneous polarization direction and a second switching state with a second spontaneous polarization direction. The conducting channel is magnetoresistive, and a magnetic field strength at the conducting channel in the first switching state is different than a magnetic field strength in the second switching state, whereby a current-voltage characteristic of the conducting channel is dependent on the switching state of the multiferroic material.
    Type: Application
    Filed: January 29, 2010
    Publication date: August 5, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Siegfried F. Karg, Gerhard Ingmar Meijer
  • Patent number: 7759729
    Abstract: A MOS device includes first and second source/drains spaced apart relative to one another. A channel is formed in the device between the first and second source/drains. A gate is formed in the device between the first and second source/drains and proximate the channel, the gate being electrically isolated from the first and second source/drains and the channel. The gate is configured to control a conduction of the channel as a function of a potential applied to the gate. The MOS device further includes an energy filter formed between the first source/drain and the channel. The energy filter includes an impurity band operative to control an injection of carriers from the first source/drain into the channel.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: July 20, 2010
    Assignee: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Riel, Walter H. Riess, Heinz Schmid
  • Publication number: 20100175748
    Abstract: A solar cell includes a substrate layer and a plurality of nanowires grown outwardly from the substrate layer, at least two of the nanowires including a plurality of sub-cells. The solar cell also includes one or more light guiding layers formed of a transparent, light scattering material and filling the area between the plurality of nanowires.
    Type: Application
    Filed: March 16, 2009
    Publication date: July 15, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Siegfried F. Karg
  • Patent number: 7723714
    Abstract: A memory cell (10) comprising at least a source electrode (MS) formed on a substrate (6); at least a drain electrode (MD) formed on the substrate (6); at least a coupling layer (1) formed between the source electrode (MS) and the drain electrode (MD), and at least a gate electrode (MG) formed on the substrate (6), wherein the coupling layer (1) comprises a transition-metal oxide exhibiting a filling-controlled metal-insulator transition property; the gate electrode (MG) comprises an oxygen ion conductor layer (2), and the gate electrode (MG) is arranged relative to the coupling layer (1) such that application of an electrical signal to the gate electrode (MG) causes alteration of the oxygen vacancy (3) concentration in the coupling layer (1).
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: May 25, 2010
    Assignee: International Business Machines Corporation
    Inventors: Siegfried F. Karg, Gerhard Ingmar Meijer
  • Patent number: 7686886
    Abstract: A method for forming a structure of a desired cross-section on a substrate is provided. The method provides a seed structure comprising at least one support layer on the substrate. The support layer has a geometric shape related to the desired cross-section of the structure and is diffusive to a precursor constituent. The method further includes growing the structure by supplying at least one precursor constituent on the substrate. The desired cross-section of the structure is defined by the geometric shape of at least one support layer.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: March 30, 2010
    Assignee: International Business Machines Corporation
    Inventors: Walter H Riess, Heike E Riel, Siegfried F Karg, Heinz Schmid
  • Publication number: 20100001301
    Abstract: The present invention is directed to an organic light emitting device (OLED) including a first electrode, a second electrode, at least one layer of organic material arranged between the first electrode and the second electrode, and a dielectric capping layer arranged on the second electrode opposite to the first electrode, wherein the capping layer comprises an outer surface, opposite to the second electrode, for emission of light generated in the at least one layer of organic material. The capping layer has the effect that a reflectance of external light is reduced whereas outcoupling of the light generated in the at least one layer of organic material through the capping layer is increased.
    Type: Application
    Filed: October 21, 2005
    Publication date: January 7, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Siegfried F. Karg, Hajime Nakamura, Heike E. Riel, Walter H. Riess, Constance Rost-Bietsch
  • Publication number: 20090298209
    Abstract: A method for manufacturing an optoelectronic device including a capping layer for improving out-coupling and optical fine-tuning of emission characteristics includes steps of: producing an optoelectronic member for generating photons of a predefined wavelength; producing a light emitting surface on the optoelectronic member; and producing a capping layer on the light emitting surface.
    Type: Application
    Filed: August 10, 2009
    Publication date: December 3, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Walter Riess, Heike E. Riel, Siegfried F. Karg
  • Publication number: 20090273011
    Abstract: A MOS device includes first and second source/drains spaced apart relative to one another. A channel is formed in the device between the first and second source/drains. A gate is formed in the device between the first and second source/drains and proximate the channel, the gate being electrically isolated from the first and second source/drains and the channel. The gate is configured to control a conduction of the channel as a function of a potential applied to the gate. The MOS device further includes an energy filter formed between the first source/drain and the channel. The energy filter includes an impurity band operative to control an injection of carriers from the first source/drain into the channel.
    Type: Application
    Filed: July 16, 2009
    Publication date: November 5, 2009
    Applicant: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Riel, Walter H. Riess, Heinz Schmid