Patents by Inventor Heike E. Riel

Heike E. Riel 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: 8754401
    Abstract: An Impact Ionization Field-Effect Transistor (I-MOS) device in which device degradation caused by hot carrier injection into a gate oxide is prevented. The device includes source, drain, and gate contacts, and a channel between the source and the drain. The channel has a dimension normal to the direction of a charge carrier transport in the channel such that the energy separation of the first two sub-bands equals or exceeds the effective energy band gap of the channel material.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: June 17, 2014
    Assignee: International Business Machines Corporation
    Inventors: Mikael T Bjoerk, Oliver Hayden, Joachim Knoch, Emanuel Loertscher, Heike E Riel, Walter Heinrich Riess, Heinz Schmid
  • Patent number: 8680510
    Abstract: A method of forming a semiconductor is provided and includes patterning a pad and a nanowire onto a wafer, the nanowire being substantially perpendicular with a pad sidewall and substantially parallel with a wafer surface and epitaxially growing on an outer surface of the nanowire a secondary layer of semiconductor material, which is lattice mismatched with respect to a material of the nanowire and substantially free of defects.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: March 25, 2014
    Assignee: International Business Machines Corporation
    Inventors: Sarunya Bangsaruntip, Mikael Bjoerk, Guy M. Cohen, Heike E. Riel, Heinz Schmid
  • Publication number: 20140060601
    Abstract: A thermoelectric element includes a body formed of a single thermoelectric material and extending in a first direction along which a thermal gradient is established in thermoelectric operation, wherein the body has at least first and second adjacent sections in the first direction; at least one of the sections is subject to stress which is applied to that section substantially all around a central axis of the body in the first direction; and the arrangement is such that the stress results in different strain in the first and second sections producing an energy barrier in the body to enhance thermoelectric operation.
    Type: Application
    Filed: August 14, 2013
    Publication date: March 6, 2014
    Applicant: International Business Machines Corporation
    Inventors: Bernd W. Gotsmann, Siegfried F. Karg, Heike E. Riel
  • Publication number: 20130228751
    Abstract: A method of forming nanowire devices. The method includes forming a stressor layer circumferentially surrounding a semiconductor nanowire. The method is performed such that, due to the stressor layer, the nanowire is subjected to at least one of radial and longitudinal strain to enhance carrier mobility in the nanowire. Radial and longitudinal strain components can be used separately or together and can each be made tensile or compressive, allowing formulation of desired strain characteristics for enhanced conductivity in the nanowire of a given device.
    Type: Application
    Filed: November 2, 2011
    Publication date: September 5, 2013
    Inventors: Bernd W Gotsmann, Siegfried F. Karg, Heike E. Riel
  • Publication number: 20130058827
    Abstract: A method for producing a mono-crystalline sheet includes providing at least two aperture elements forming a gap in between; providing a molten alloy including silicon in the gap; providing a gaseous precursor medium comprising silicon in the vicinity of the molten alloy; providing a silicon nucleation crystal in the vicinity of the molten alloy; and bringing in contact said silicon nucleation crystal and the molten alloy. A device for producing a mono-crystalline sheet includes at least two aperture elements at a predetermined distance from each other, thereby forming a gap, and being adapted to be heated for holding a molten alloy including silicon by surface tension in the gap between the aperture elements; a precursor gas supply supplies a gaseous precursor medium comprising silicon in the vicinity of the molten alloy; and a positioning device for holding and moving a nucleation crystal in the vicinity of the molten alloy.
    Type: Application
    Filed: May 23, 2011
    Publication date: March 7, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mikael T. Bjoerk, Heike E. Riel, Heinz Schmid
  • Publication number: 20120280292
    Abstract: A semiconductor device and a method for fabricating the semiconductor device. The device includes: a doped semiconductor having a source region, a drain region, a channel between the source and drain regions, and an extension region between the channel and each of the source and drain regions; a gate formed on the channel; and a screening coating on each of the extension regions. The screening coating includes: (i) an insulating layer that has a dielectric constant that is no greater than about half that of the extension regions and is formed directly on the extension regions, and (ii) a screening layer on the insulating layer, where the screening layer screens the dopant ionization potential in the extension regions to inhibit dopant deactivation.
    Type: Application
    Filed: October 18, 2010
    Publication date: November 8, 2012
    Applicant: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Joachim Knoch, Heike E. Riel, Walter Heinrich Riess, Heinz Schmid
  • Patent number: 8288803
    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: Grant
    Filed: August 31, 2009
    Date of Patent: October 16, 2012
    Assignee: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Siegfried F. Karg, Joachim Knoch, Heike E. Riel, Walter H. Riess, Paul M. Solomon
  • 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: 8193524
    Abstract: An electronic device and method of manufacturing the device. The device includes a semiconducting region, which can be a nanowire, a first contact electrically coupled to the semiconducting region, and at least one second contact capacitively coupled to the semiconducting region. At least a portion of the semiconducting region between the first contact and the second contact is covered with a dipole layer. The dipole layer can act as a local gate on the semiconducting region to enhance the electric properties of the device.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 5, 2012
    Assignee: International Business Machines Corporation
    Inventors: Mikael T Bjoerk, Joachim Knoch, Heike E Riel, Walter Heinrich Riess, Heinz Schmid
  • 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
  • Publication number: 20110315953
    Abstract: A method of forming a semiconductor is provided and includes patterning a pad and a nanowire onto a wafer, the nanowire being substantially perpendicular with a pad sidewall and substantially parallel with a wafer surface and epitaxially growing on an outer surface of the nanowire a secondary layer of semiconductor material, which is lattice mismatched with respect to a material of the nanowire and substantially free of defects.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 29, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Sarunya Bangsaruntip, Mikael Bjoerk, Guy M. Cohen, Heike E. Riel, 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: 7947580
    Abstract: A method for the fabrication of a semiconductor structure that includes areas that have different crystalline orientation and semiconductor structure formed thereby. The disclosed method allows fabrication of a semiconductor structure that has areas of different semiconducting materials. The method employs templated crystal growth using a Vapor-Liquid-Solid (VLS) growth process. A silicon semiconductor substrate having a first crystal orientation direction is etched to have an array of holes into its surface. A separation layer is formed on the inner surface of the hole for appropriate applications. A growth catalyst is placed at the bottom of the hole and a VLS crystal growth process is initiated to form a nanowire. The resultant nanowire crystal has a second different crystal orientation which is templated by the geometry of the hole.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: May 24, 2011
    Assignee: International Business Machines Corporation
    Inventors: Mikael T. Bjoerk, Oliver Hayden, Heike E. Riel, Walter Heinrich Riess, Heinz Schmid
  • Publication number: 20110049476
    Abstract: An Impact Ionization Field-Effect Transistor (I-MOS) device in which device degradation caused by hot carrier injection into a gate oxide is prevented. The device includes source, drain, and gate contacts, and a channel between the source and the drain. The channel has a dimension normal to the direction of a charge carrier transport in the channel such that the energy separation of the first two sub-bands equals or exceeds the effective energy band gap of the channel material.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 3, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mikael T. Bjoerk, Oliver Hayden, Joachim Knoch, Emanuel Loertscher, Heike E. Riel, Walter Heinrich Riess, Heinz Schmid
  • 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
  • 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: 20100072460
    Abstract: An electronic device and method of manufacturing the device. The device includes a semiconducting region, which can be a nanowire, a first contact electrically coupled to the semiconducting region, and at least one second contact capacitively coupled to the semiconducting region. At least a portion of the semiconducting region between the first contact and the second contact is covered with a dipole layer. The dipole layer can act as a local gate on the semiconducting region to enhance the electric properties of the device.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mikael T. Bjoerk, Joachim Knoch, Heike E. Riel, Walter Heinrich Riess, 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