Patents by Inventor Lothar Risch

Lothar Risch 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: 7829892
    Abstract: An integrated circuit including a gate electrode is disclosed. One embodiment provides a transistor including a first source/drain electrode and a second source/drain electrode. A channel is arranged between the first and the second source/drain electrode in a semiconductor substrate. A gate electrode is arranged adjacent the channel layer and is electrically insulated from the channel layer. A semiconductor substrate electrode is provided on a rear side. The gate electrode encloses the channel layer at least two opposite sides.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: November 9, 2010
    Assignee: Qimonda AG
    Inventors: Richard Johannes Luyken, Franz Hofmann, Lothar Risch, Dirk Manger, Wolfgang Roesner, Till Schloesser, Michael Specht
  • Patent number: 7804708
    Abstract: An integrated circuit including an array of memory cells and method. In one embodiment, each memory cell includes a resistively switching memory element and a selection diode for selecting one cell from the plurality of memory cells. The memory element is coupled with its top to a first selection line and with its bottom side to the selection diode, the diode further being coupled to the bottom side of a second selection line.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: September 28, 2010
    Assignee: Qimonda AG
    Inventors: Ulrike Gruening-von Schwerin, Lothar Risch, Peter Baars, Klaus Muemmler, Stefan Tegen, Thomas Happ
  • Publication number: 20100027325
    Abstract: An integrated circuit including an array of memory cells and method. In one embodiment, each memory cell includes a resistively switching memory element and a selection diode for selecting one cell from the plurality of memory cells. The memory element is coupled with its top to a first selection line and with its bottom side to the selection diode, the diode further being coupled to the bottom side of a second selection line.
    Type: Application
    Filed: July 30, 2008
    Publication date: February 4, 2010
    Applicant: QIMONDA AG
    Inventors: Ulrike Gruening-von Schwerin, Lothar Risch, Peter Baars, Klaus Muemmler, Stefan Tegen, Thomas Happ
  • Publication number: 20090225580
    Abstract: An integrated circuit includes a plurality of memory cells, each memory cell including a memory element and a select device; and a plurality of word lines and bit lines connected to the memory cells. The bit lines, word lines, and the memory elements are arranged above the select devices.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 10, 2009
    Inventors: Peng-Fei Wang, Gill Yong Lee, Lothar Risch
  • Patent number: 7368752
    Abstract: A DRAM memory cell is provided with a selection transistor, which is arranged horizontally at a semiconductor substrate surface and has a first source/drain electrode, a second source/drain electrode, a channel layer arranged between the first and the second source/drain electrode in the semiconductor substrate, and a gate electrode, which is arranged along the channel layer and is electrically insulated from the channel layer, a storage capacitor, which has a first capacitor electrode and a second capacitor electrode, insulated from the first capacitor electrode, one of the capacitor electrodes of the storage capacitor being electrically conductively connected to one of the source/drain electrodes of the selection transistor, and a semiconductor substrate electrode on the rear side, the gate electrode enclosing the channel layer at at least two opposite sides.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: May 6, 2008
    Assignee: Infineon Technologies AG
    Inventors: Richard J. Luyken, Franz Hofmann, Lothar Risch, Dirk Manger, Wolfgang Rösner, Till Schlösser, Michael Specht
  • Publication number: 20080054324
    Abstract: An integrated circuit including a gate electrode is disclosed. One embodiment provides a transistor including a first source/drain electrode and a second source/drain electrode. A channel is arranged between the first and the second source/drain electrode in a semiconductor substrate. A gate electrode is arranged adjacent the channel layer and is electrically insulated from the channel layer. A semiconductor substrate electrode is provided on a rear side. The gate electrode encloses the channel layer at at least two opposite sides.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 6, 2008
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Richard Luyken, Franz Hofmann, Lothar Risch, Dirk Manger, Wolfgang Rosner, Till Schloesser, Michael Specht
  • Patent number: 7180115
    Abstract: The invention relates to a transistor that is provided with a first source/drain area (S/D1), a channel area (KA) adjacent thereto, a second source/drain area (S/D 2) adjacent thereto, a gate dielectric and a gate electrode. A first capacitor electrode (SP) of the capacitor is connected to the first source/drain area (S/D1). An insulating structure entirely surrounds an insulating area of the circuit arrangement. At least the first capacitor electrode (SP) and the first source/drain area (S/D1) are arranged in the insulating area. The second source/drain area (S/D2) and the second capacitor electrode of the capacitor are arranged outside the insulating area. The insulating structure prevents the first capacitor electrode (SP) from loosing charge through leaking currents between charging and discharging of the capacitor. A tunnel barrier (T) which is arranged in the channel area (KA) is part of the insulating structure.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: February 20, 2007
    Assignee: Infineon Technologies AG
    Inventors: Franz Hofmann, Wolfgang Roesner, Lothar Risch, Till Schloesser
  • Patent number: 6909141
    Abstract: A vertical semiconductor transistor component is built up on a substrate by using a statistical mask. The vertical semiconductor transistor component has vertical pillar structures statistically distributed over the substrate. The vertical pillar structures are electrically connected on a base side thereof to a first common electrical contact. The vertical pillar structures include, along the vertical direction, layer zones of differing conductivity, and have insulation layers on their circumferential walls. An electrically conductive material is deposited between the pillar structures and forms a second electrical contact of the semiconductor transistor component. The pillar structures are electrically contacted to a third common electrical contact on their capping side.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: June 21, 2005
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Rösner, Thomas Schulz, Lothar Risch, Thomas Äugle, Herbert Schäfer, Martin Franosch
  • Patent number: 6864129
    Abstract: A double gate MOSFET transistor and a method for fabricating it are described. In this case, a semiconductor layer structure of a transistor channel to be formed is embedded in a spacer material and contact-connected by source and drain regions which are filled into depressions that are etched on opposite sides of the semiconductor layer structure. Afterwards, the spacer material is etched out selectively and replaced by the electrically conductive gate electrode material.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: March 8, 2005
    Assignee: Infineon Technologies AG
    Inventors: Lothar Risch, Wolfgang Rösner, Thomas Schulz
  • Publication number: 20040266088
    Abstract: A DRAM memory cell is provided with a selection transistor, which is arranged horizontally at a semiconductor substrate surface and has a first source/drain electrode, a second source/drain electrode, a channel layer arranged between the first and the second source/drain electrode in the semiconductor substrate, and a gate electrode, which is arranged along the channel layer and is electrically insulated from the channel layer, a storage capacitor, which has a first capacitor electrode and a second capacitor electrode, insulated from the first capacitor electrode, one of the capacitor electrodes of the storage capacitor being electrically conductively connected to one of the source/drain electrodes of the selection transistor, and a semiconductor substrate electrode on the rear side, the gate electrode enclosing the channel layer at at least two opposite sides.
    Type: Application
    Filed: May 6, 2004
    Publication date: December 30, 2004
    Applicant: Infineon Technologies AG
    Inventors: Richard J. Luyken, Franz Hofmann, Lothar Risch, Dirk Manger, Wolfgang Rosner, Till Schlosser, Michael Specht
  • Patent number: 6614069
    Abstract: A nonvolatile semiconductor memory cell includes a transistor component formed on a substrate and a storage node that determines the switching state of the transistor component. The storage node is arranged near a control gate electrode. The storage node has a group of vertically oriented column structures having at least two semiconductor layer zones and an insulating layer zone situated between the two semiconductor layer zones.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: September 2, 2003
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Rösner, Thomas Schulz, Lothar Risch, Ties Ramcke
  • Patent number: 6600200
    Abstract: A MOS transistor and a method for fabricating the same include producing a well doped by a first conductivity type in a semiconductor substrate. An epitaxial layer having a dopant concentration of less than 1017 cm−3 is disposed on a surface of the doped well. Source/drain regions doped by a second conductivity type, opposite to the first conductivity type, and a channel region, are disposed in the epitaxial layer, and their depth is less than or equal to the thickness of the epitaxial layer. A method for fabricating two complementary MOS transistors is also provided.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: July 29, 2003
    Assignee: Infineon Technologies AG
    Inventors: Bernhard Lustig, Herbert Schäfer, Lothar Risch
  • Patent number: 6553157
    Abstract: In an integrated optoelectronic microelectronic system, an optoelectronically active diode part is formed in a semiconductor substrate by zones forming depletion layers. The system is provided in a mesa that stands vertically on a semiconductor substrate and runs in a direction of extension thereof. A light waveguide is optically coupled to the diode part in such a way that light is coupled into the diode part via the mesa side wall.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: April 22, 2003
    Assignee: Infineon Technologies AG
    Inventors: Thomas Schultz, Wolfgang Rösner, Lothar Risch
  • Patent number: 6518628
    Abstract: An integrated CMOS circuit arrangement and a method of manufacturing same, which includes both a first MOS transistor and a second MOS transistor complementary thereto, wherein one of the MOS transistors is arranged at the floor of a trench and the other is arranged at the principal surface of a semiconductor substrate. The MOS transistors are arranged relative to one another such that a current flow through the MOS transistors respectively occurs substantially parallel to a sidewall of the trench that is arranged between the MOS transistors.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: February 11, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Krautschneider, Franz Hofmann, Lothar Risch
  • Patent number: 6503784
    Abstract: A semiconductor body-having a pair of vertical, double-gated CMOS transistors. An insulating layer extending horizontally beneath the surface of the semiconductor body such insulating layer being disposed beneath the pair of transistors. The transistors, together with additional such transistors, are arranged to form a Synchronous Dynamic Random Access Memory (SRAM) array. The array includes a plurality of SRAM cells arranged in rows and columns, each one of the cells having a WORDLINE connected to a WORLDINE CONTACT. The WORDLINE CONTACT is common to four contiguous one of the cells. One of the cells having a plurality of electrically interconnected MOS transistors arranged to provide an SRAM circuit. Each one of the cells has a VDD CONTACT and a VSS CONTACT. One of such CONTACTs is disposed centrally within each one of the cells and the other one of the CONTACTs being common to four contiguous ones of the cells.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: January 7, 2003
    Assignee: Infineon Technologies Richmond, LP
    Inventors: Gerhard Enders, Thomas Schulz, Dietrich Widmann, Lothar Risch
  • Patent number: 6490190
    Abstract: A memory cell configuration has word lines and bit lines that extend transversely with respect thereto. Memory elements with a giant magnetoresistive effect are respectively connected between one of the word lines and one of the bit lines. The bit lines are each connected to a sense amplifier by means of which the potential on the respective bit line can be regulated to a reference potential and at which an output signal can be picked off. The memory cell configuration can be used both as an MRAM and as an associative memory.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: December 3, 2002
    Assignee: Infineon Technologies AG
    Inventors: Ties Ramcke, Wolfgang Rösner, Lothar Risch
  • Patent number: 6472767
    Abstract: A semiconductor body having a pair of vertical, double-gated CMOS transistors. An insulating layer extending horizontally beneath the surface of the semiconductor body such insulating layer being disposed beneath the pair of transistors. The transistors, together with additional such transistors, are arranged to form a Synchronous Dynamic Random Access Memory (SRAM) array. The array includes a plurality of SRAM cells arranged in rows and columns, each one of the cells having a WORDLINE connected to a WORLDINE CONTACT. The WORDLINE CONTACT is common to four contiguous one of the cells. One of the cells having a plurality of electrically interconnected MOS transistors arranged to provide an SRAM circuit. Each one of the cells has a VDD CONTACT and a VSS CONTACT. One of such CONTACTs is disposed centrally within each one of the cells and the other one of the CONTACTs being common to four contiguous ones of the cells.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: October 29, 2002
    Assignee: Infineon Technologies AG
    Inventors: Gerhard Enders, Thomas Schulz, Dietrich Widmann, Lothar Risch
  • Patent number: 6459123
    Abstract: A semiconductor body having a pair of vertical, double-gated CMOS transistors. An insulating layer extending horizontally beneath the surface of the semiconductor body such insulating layer being disposed beneath the pair of transistors. The transistors, together with additional such transistors, are arranged to form a Synchronous Dynamic Random Access Memory (SRAM) array. The array includes a plurality of SRAM cells arranged in rows and columns, each one of the cells having a WORDLINE connected to a WORLDINE CONTACT. The WORDLINE CONTACT is common to four contiguous one of the cells. One of the cells having a plurality of electrically interconnected MOS transistors arranged to provide an SRAM circuit. Each one of the cells has a VDD CONTACT and a VSS CONTACT. One of such CONTACTs is disposed centrally within each one of the cells and the other one of the CONTACTs being common to four contiguous ones of the cells.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: October 1, 2002
    Assignee: Infineon Technologies Richmond, LP
    Inventors: Gerhard Enders, Thomas Schulz, Dietrich Widmann, Lothar Risch
  • Publication number: 20020125525
    Abstract: A nonvolatile semiconductor memory cell includes a transistor component formed on a substrate and a storage node that determines the switching state of the transistor component. The storage node is arranged near a control gate electrode. The storage node has a group of vertically oriented column structures having at least two semiconductor layer zones and an insulating layer zone situated between the two semiconductor layer zones.
    Type: Application
    Filed: January 22, 2002
    Publication date: September 12, 2002
    Inventors: Wolfgang Rosner, Thomas Schulz, Lothar Risch, Ties Ramcke
  • Publication number: 20020121662
    Abstract: A vertical semiconductor transistor component is built up on a substrate by using a statistical mask. The vertical semiconductor transistor component has vertical pillar structures statistically distributed over the substrate. The vertical pillar structures are electrically connected on a base side thereof to a first common electrical contact. The vertical pillar structures include, along the vertical direction, layer zones of differing conductivity, and have insulation layers on their circumferential walls. An electrically conductive material is deposited between the pillar structures and forms a second electrical contact of the semiconductor transistor component. The pillar structures are electrically contacted to a third common electrical contact on their capping side.
    Type: Application
    Filed: January 16, 2002
    Publication date: September 5, 2002
    Inventors: Wolfgang Rosner, Thomas Schulz, Lothar Risch, Thomas Augle, Herbert Schafer, Martin Franosch