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: 6442042
    Abstract: At least one CMOS component which is configured in a semiconductor substrate is part of the inventive circuit assembly. An insulating layer is configured on the semiconductor substrate. The insulating layer covers the CMOS component. A nanoelectronic component is configured above the insulating layer. At least one conducting structure is configured in the insulating layer and serves to link the nanoelectronic component with the CMOS component. If several nanoelectronic components are provided, they are preferably grouped to nano-circuit blocks. Each of the nano-circuit blocks is so small that the RC times of their lines do not exceed 1 ns.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: August 27, 2002
    Assignee: Infineon Technologies AG
    Inventors: Ties Ramcke, Lothar Risch, Wolfgang Rösner
  • Publication number: 20020110329
    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: Application
    Filed: March 7, 2002
    Publication date: August 15, 2002
    Inventors: Thomas Schulz, Wolfgang Rosner, Lothar Risch
  • Patent number: 6420228
    Abstract: A DRAM cell configuration includes a vertical MOS transistor per memory cell. First source/drain regions of the transistor each belong to two adjacent transistors and adjoin a bit line. Second source/drain regions of the transistor are connected to a storage node. A gate electrode of the transistor has exactly two sides adjoined by a gate oxide. The DRAM cell configuration can be produced by using three masks with a memory cell area of 4 F2. F is a minimum structure size which can be produced by using the respective technology.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: July 16, 2002
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Roesner, Lothar Risch, Franz Hofmann
  • Patent number: 6417043
    Abstract: Resistors are connected between word lines and bit lines running transversely with respect thereto. The resistors have a higher resistance than the word lines and the bit lines. The bit lines are each connected to a sense amplifier which regulates the potential on the respective bit line to a reference potential and at which an output signal can be picked off. If one of the word lines is selected and all the other word lines are put at reference potential, then the resistance of the resistor, which is assigned to an information item, can be read from the output signal.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: July 9, 2002
    Assignee: Infineon Technologies AG
    Inventors: Lothar Risch, Wolfgang Rösner, Ties Ramcke, Hermann Jacobs
  • Publication number: 20020081791
    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: Application
    Filed: November 28, 2001
    Publication date: June 27, 2002
    Inventors: Lothar Risch, Wolfgang Rosner, Thomas Schulz
  • Patent number: 6362502
    Abstract: A memory cell contains a memory transistor and a transfer transistor. A gate electrode of the transfer transistor and a control gate electrode of the memory transistor are connected to a word line. The memory transistor has a floating gate electrode that is isolated from a channel region of the memory transistor by a first dielectric layer and is connected to a first source/drain region of the transfer transistor. The control gate electrode is isolated from the floating gate electrode by a second dielectric layer. A first source/drain region of the memory transistor is connected to a bit line. The memory and transfer transistors are preferably of different conductivity types. During the writing of information, the transfer transistor is in the on-state and the memory transistor is in the off-state. During the reading-out of information, the transfer transistor is in the off-state and the memory transistor is in the on-state.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: March 26, 2002
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Rösner, Thomas Schulz, Lothar Risch, Franz Hofmann
  • Patent number: 6351408
    Abstract: A memory cell configuration has word lines and bit lines running transversely with respect thereto. Memory elements with a magnetoresistive effect are respectively connected between one of the word lines and one of the bit lines. The memory elements are disposed in at least two layers one above the other.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: February 26, 2002
    Assignee: Infineon Technologies AG
    Inventors: Siegfried Schwarzl, Lothar Risch
  • Patent number: 6337247
    Abstract: A spacer is used as a mask in an etching step during which a layer structure is produced for a channel layer and for a first source/drain region. After the layer structure has been produced, the first source/drain region and a second source/drain region can be produced by implantation. The second source/drain region is self-aligned on two mutually opposite flanks of the layer structure. A gate electrode can be produced in the form of a spacer on the two flanks. In order to avoid a capacitance formed by a first contact of the gate electrode and the first source/drain region, a part of the first source/drain region may be removed. If the layer structure is produced along edges of an inner area, then a third contact of the second source/drain region may be produced inside the inner area in order to reduce the surface area of the transistor.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: January 8, 2002
    Assignee: Infineon Technologies AG
    Inventors: Thomas Schulz, Thomas Äugle, Wolfgang Rösner, Lothar Risch
  • Publication number: 20010055201
    Abstract: At least one CMOS component which is configured in a semiconductor substrate is part of the inventive circuit assembly. An insulating layer is configured on the semiconductor substrate. The insulating layer covers the CMOS component. A nanoelectronic component is configured above the insulating layer. At least one conducting structure is configured in the insulating layer and serves to link the nanoelectronic component with the CMOS component. If several nanoelectronic components are provided, they are preferably grouped to nano-circuit blocks. Each of the nano-circuit blocks is so small that the RC times of their lines do not exceed 1 ns.
    Type: Application
    Filed: June 18, 2001
    Publication date: December 27, 2001
    Inventors: Ties Ramcke, Lothar Risch, Wolfgang Rosner
  • Patent number: 6320447
    Abstract: The circuit configuration has at least five single-electron transistors, three of which are connected via a second main node and a third main node between a first main node and an output. The fourth single-electron transistor is connected between the second main node and a first supply voltage, with its gate electrode being connected to the first main node. The fifth single-electron transistor is connected between the third main node and the first supply voltage, with its gate electrode being connected to the second main node. The circuit configuration is suitable for use as a full adder and as a multiplier.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: November 20, 2001
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Rösner, Ties Ramcke, Lothar Risch
  • Patent number: 6307422
    Abstract: At least one single-electron transistor is provided in a circuit configuration having single-electron components, and is connected between a first main node and a second main node. The first main node is capacitively connected between a first operating voltage connection and a second operating voltage connection. The gate electrode of the single-electron transistor is connected to a control voltage connection. The circuit configuration is suitable for logic operations on binary numbers, whose digits are stored at the first and second main nodes.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: October 23, 2001
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Roesner, Ties Ramcke, Lothar Risch
  • Patent number: 6300652
    Abstract: A memory cell configuration and a method for its production include stacked capacitors and use a vertical storage capacitor having a ferroelectric or paraelectric storage dielectric. In order to produce the storage capacitor, a dielectric layer for the storage dielectric is produced over the whole area. The dielectric layer is subsequently structured and first electrodes and second electrodes for the storage capacitors are formed. The invention is suitable for Gbit DRAMs and for nonvolatile memories.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: October 9, 2001
    Assignee: Infineon Technologies AG
    Inventors: Lothar Risch, Franz Hofmann, Rainer Bruchhaus, Wolfram Wersing
  • Patent number: 6274431
    Abstract: An integrated circuit arrangement contains an MOS transistor surrounded by an insulation structure, the source and drain thereof being arranged laterally and in different depths. A channel thereof proceeds essentially perpendicular to the surface of the circuit arrangement. Since the channel length is determined by etching or by growing a layer, channel lengths as short as less than 50 nm can be realized. For the manufacture, most of the masks of the traditional circuit arrangements in which planar transistors are integrated are employed, this significantly facilitating incorporation into the semiconductor manufacture.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: August 14, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lothar Risch, Wolfgang Roesner, Thomas Aeugle, Wolfgang Krautschneider
  • Patent number: 6262448
    Abstract: A DRAM cell is disposed in an electrically isolated region of a semiconductor body. The cell includes a storage capacitor disposed in a trench. The capacitor is disposed entirely within the isolated region of the semiconductor body. The cell includes a transistor disposed in the isolated region. The transistor has a pair of gates. A word line is provided for addressing the cell. The word line has an electrical contact region to the transistor. The word line contact region is disposed entirely within the isolated region of the semiconductor body. The transistor has an active area. The active area has source, drain, and channel regions. The active area is disposed entirely within the isolated region of the semiconductor body. A bit line is provided for the cell. The bit line is in electrical contact with the gates of the transistor at a pair of bit line contact regions. Both such bit line contact regions are disposed entirely within the isolated region of the cell.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: July 17, 2001
    Assignee: Infineon Technologies North America Corp.
    Inventors: Gerhard Enders, Matthias Ilg, Lothar Risch, Dietrich Widmann
  • Patent number: 6255684
    Abstract: A DRAM cell configuration includes a vertical MOS transistor per memory cell. First source/drain regions of the transistor each belong to two adjacent transistors and adjoin a bit line. Second source/drain regions of the transistor are connected to a storage node. A gate electrode of the transistor has exactly two sides adjoined by a gate oxide. The DRAM cell configuration can be produced by using three masks, with a memory cell area of 4 F2. F is a minimum structure size which can be produced by using the respective technology.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: July 3, 2001
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Roesner, Lothar Risch, Franz Hofmann
  • Patent number: 6229169
    Abstract: A memory cell configuration contains a multiplicity of memory cells in a semiconductor substrate. Each of the memory cells has a selection transistor connected between a bit line and a storage element. The memory cells can each be driven via a first word line and a second word line, the first word line and the second word line crossing one another. The memory cell configuration is, in particular, a DRAM configuration.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: May 8, 2001
    Assignee: Infineon Technologies AG
    Inventors: Franz Hofmann, Wolfgang Krautschneider, Wolfgang Rösner, Lothar Risch, Till Schlösser, Paul-Werner Basse
  • Patent number: 6184045
    Abstract: A memory cell contains at least one transistor and one capacitor connected to an upper bit line. The capacitor contains a first capacitor electrode arranged above the transistor, and is connected to the transistor. The upper bit line can be created in self-adjusted fashion on the basis of trenches which are of different widths, which extend transversely to one another, and which are arranged between the first capacitor electrodes. At least a part of each first capacitor electrode can be created from a layer which is structured by the trenches. Trenches can be narrowed by spacers.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: February 6, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Hofman, Lothar Risch, Wolfgang Roesner, Wolfgang Krautschneider
  • Patent number: 6147376
    Abstract: A memory cell contains at least one transistor and one capacitor connected to an upper bit line. The capacitor contains a first capacitor electrode arranged above the transistor, and is connected to the transistor. The upper bit line can be created in self-adjusted fashion on the basis of trenches which are of different widths, which extend transversely to one another, and which are arranged between the first capacitor electrodes. At least a part of each first capacitor electrode can be created from a layer which is structured by the trenches. Trenches can be narrowed by spacers.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: November 14, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Hofman, Lothar Risch, Wolfgang Roesner, Wolfgang Krautschneider
  • Patent number: 6066876
    Abstract: An integrated circuit arrangement contains an MOS transistor surrounded by an insulation structure, the source and drain thereof being arranged laterally and in different depths. A channel thereof proceeds essentially perpendicular to the surface of the circuit arrangement. Since the channel length is determined by etching or by growing a layer, channel lengths as short as less than 50 nm can be realized. For the manufacture, most of the masks of the traditional circuit arrangements in which planar transistors are integrated are employed, this significantly facilitating incorporation into the semiconductor manufacture.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: May 23, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lothar Risch, Wolfgang Roesner, Thomas Aeugle, Wolfgang Krautschneider
  • Patent number: 6060911
    Abstract: In the circuit arrangement two of the four vertical transistors are complementary to the remaining two transistors. Two of the transistors are respectively arranged at the same level. For this purpose, layer structures (St1, St2, St3, St4) are structured that respectively have at least a channel layer and a source/drain region of one of the transistors. All the layer structures (St1, St2, St3, St4) can be produced from a layer sequence with only four layers. In order to avoid leakage currents due to a parasitic bipolar transistor, the layer structures (St1, St2, St3, St4) can be realized very thinly, using spacer-type masks. Electrical connections between parts of the four transistors can take place via layers of the layer sequence. The contacting to the output voltage terminal can take place via a step that is formed by two layers of the layer sequence.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: May 9, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Schulz, Thomas Aeugle, Wolfgang Roesner, Lothar Risch