Patents by Inventor Stefan Willkofer

Stefan Willkofer 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).

  • Publication number: 20180061660
    Abstract: A method of fabricating a semiconductor device includes forming a barrier layer over a surface of a semiconductor substrate. A treated barrier layer is formed by subjecting an exposed surface of the barrier layer to a surface treatment process. The surface treatment process includes treating the surface with a reactive material. A material layer is formed over the treated barrier layer. The material layer comprises a metal.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 1, 2018
    Inventors: Ravi Keshav Joshi, Kae-Horng Wang, Stefan Willkofer
  • Patent number: 9891640
    Abstract: An embodiment relates to a device comprising a high-side semiconductor, a low-side semiconductor, a first sensing element arranged adjacent to the high-side semiconductor. The first sensing element is isolated from the high-side semiconductor and the first sensing element is directly connectable to a processing device.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: February 13, 2018
    Assignee: Infineon Technologies AG
    Inventors: Stefan Willkofer, Andreas Kiep
  • Patent number: 9871126
    Abstract: A discrete semiconductor transistor includes a gate resistor electrically coupled between a gate electrode terminal and a gate electrode of the discrete semiconductor transistor. A resistance R of the gate resistor at a temperature of ?40° C. is greater than at the temperature of 150° C.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: January 16, 2018
    Assignee: Infineon Technologies AG
    Inventors: Andreas Kiep, Stefan Willkofer, Hans-Joachim Schulze
  • Patent number: 9768766
    Abstract: A circuit may comprise an electronic switching element, an integrated sensor, and a low-impedance path from one of the terminals of the sensor to one of the terminals of the electronic switching element.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: September 19, 2017
    Assignee: Infineon Technologies Austria AG
    Inventors: Stefan Willkofer, Gernot Langguth, Wolfgang Roesner, Andreas Grassmann
  • Patent number: 9513318
    Abstract: An example relates to a circuit comprising an electronic switching element and an temperature compensating element, which is arranged in the vicinity of the electronic switching element.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: December 6, 2016
    Assignee: Infineon Technologies AG
    Inventors: Andreas Kiep, Stefan Willkofer
  • Publication number: 20160086842
    Abstract: A method for producing a semiconductor device having a sidewall insulation includes providing a semiconductor body having a first side and a second side lying opposite the first side. At least one first trench is at least partly filled with insulation material proceeding from the first side in the direction toward the second side into the semiconductor body. The at least one first trench is produced between a first semiconductor body region for a first semiconductor device and a second semiconductor body region for a second semiconductor device. An isolating trench extends from the first side of the semiconductor body in the direction toward the second side of the semiconductor body between the first and second semiconductor body regions in such a way that at least part of the insulation material of the first trench adjoins at least a sidewall of the isolating trench. The second side of the semiconductor body is partly removed as far as the isolating trench.
    Type: Application
    Filed: December 1, 2015
    Publication date: March 24, 2016
    Inventors: CARSTEN AHRENS, RUDOLF BERGER, MANFRED FRANK, UWE HOECKELE, BERNHARD KNOTT, ULRICH KRUMBEIN, WOLFGANG LEHNERT, BERTHOLD SCHUDERER, JUERGEN WAGNER, STEFAN WILLKOFER
  • Patent number: 9269654
    Abstract: A semiconductor device, a method of manufacturing a semiconductor device and a method for transmitting a signal are disclosed. In accordance with an embodiment of the present invention, the semiconductor device comprises a first semiconductor chip comprising a first coil, a second semiconductor chip comprising a second coil inductively coupled to the first coil, and an isolating intermediate layer between the first semiconductor chip and the second semiconductor chip.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: February 23, 2016
    Assignee: Infineon Technologies AG
    Inventors: Stefan Willkofer, Uwe Wahl, Bernhard Knott, Markus Hammer, Andreas Strasser
  • Publication number: 20160013639
    Abstract: A circuit may comprise an electronic switching element, an integrated sensor, and a low-impedance path from one of the terminals of the sensor to one of the terminals of the electronic switching element.
    Type: Application
    Filed: July 14, 2014
    Publication date: January 14, 2016
    Inventors: Stefan Willkofer, Gernot Langguth, Wolfgang Roesner, Andreas Grassmann
  • Patent number: 9236290
    Abstract: A method for producing a semiconductor device having a sidewall insulation includes providing a semiconductor body having a first side and a second side lying opposite the first side. At least one first trench is at least partly filled with insulation material proceeding from the first side in the direction toward the second side into the semiconductor body. The at least one first trench is produced between a first semiconductor body region for a first semiconductor device and a second semiconductor body region for a second semiconductor device. An isolating trench extends from the first side of the semiconductor body in the direction toward the second side of the semiconductor body between the first and second semiconductor body regions in such a way that at least part of the insulation material of the first trench adjoins at least a sidewall of the isolating trench. The second side of the semiconductor body is partly removed as far as the isolating trench.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: January 12, 2016
    Assignee: Infineon Technologies AG
    Inventors: Carsten Ahrens, Rudolf Berger, Manfred Frank, Uwe Hoeckele, Bernhard Knott, Ulrich Krumbein, Wolfgang Lehnert, Berthold Schuderer, Juergen Wagner, Stefan Willkofer
  • Publication number: 20150364468
    Abstract: A discrete semiconductor transistor includes a gate resistor electrically coupled between a gate electrode terminal and a gate electrode of the discrete semiconductor transistor. A resistance R of the gate resistor at a temperature of ?40° C. is greater than at the temperature of 150° C.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventors: Andreas Kiep, Stefan Willkofer, Hans-Joachim Schulze
  • Publication number: 20150346245
    Abstract: An example relates to a circuit comprising an electronic switching element and an temperature compensating element, which is arranged in the vicinity of the electronic switching element.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 3, 2015
    Inventors: Andreas Kiep, Stefan Willkofer
  • Publication number: 20150346037
    Abstract: An integrated temperature sensor comprising a barrier layer connecting at least two conductive elements, wherein the barrier layer has a positive temperature coefficient.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 3, 2015
    Inventors: Andreas Kiep, Stefan Willkofer, Andreas Strasser
  • Patent number: 8932476
    Abstract: Apparatuses and methods are provided where porous metal is deposited on a substrate, a mask is provided on the porous metal and then an etching is performed.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 13, 2015
    Assignee: Infineon Technologies AG
    Inventors: Thomas Kunstmann, Stefan Willkofer, Anja Gissibl, Johann Strasser, Matthias Mueller, Eva-Maria Hess
  • Publication number: 20140368258
    Abstract: An embodiment relates to a device comprising a high-side semiconductor, a low-side semiconductor, a first sensing element arranged adjacent to the high-side semiconductor. The first sensing element is isolated from the high-side semiconductor and the first sensing element is directly connectable to a processing device.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Stefan Willkofer, Andreas Kiep
  • Publication number: 20140217062
    Abstract: Apparatuses and methods are provided where porous metal is deposited on a substrate, a mask is provided on the porous metal and then an etching is performed.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 7, 2014
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Thomas Kunstmann, Stefan Willkofer, Anja Gissibl, Johann Strasser, Matthias Mueller, Eva-Maria Hess
  • Patent number: 8753982
    Abstract: A method for producing a connection region on a side wall of a semiconductor body is disclosed. A first trench is produced on a first surface of a semiconductor body and extends into the semiconductor body. An insulation layer is formed on the side walls and on the bottom of the first trench, and the first trench is only partially filled. The unfilled part of the first trench is filled with an electrically conductive material. A separating trench is produced along the first trench in such a way that a side wall of the separating trench directly adjoins the first trench. The part of the insulation layer which adjoins the separating trench is at least partially removed, with the result that at least some of the electrically conductive material in the first trench is exposed.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: June 17, 2014
    Assignee: Infineon Technologies AG
    Inventors: Carsten Ahrens, Berthold Schuderer, Stefan Willkofer
  • Publication number: 20140159220
    Abstract: A semiconductor device, a method of manufacturing a semiconductor device and a method for transmitting a signal are disclosed. In accordance with an embodiment of the present invention, the semiconductor device comprises a first semiconductor chip comprising a first coil, a second semiconductor chip comprising a second coil inductively coupled to the first coil, and an isolating intermediate layer between the first semiconductor chip and the second semiconductor chip.
    Type: Application
    Filed: February 13, 2014
    Publication date: June 12, 2014
    Applicant: Infineon Technologies AG
    Inventors: Stefan Willkofer, Uwe Wahl, Bernhard Knott, Markus Hammer, Andreas Strasser
  • Patent number: 8674800
    Abstract: A semiconductor device, a method of manufacturing a semiconductor device and a method for transmitting a signal are disclosed. In accordance with an embodiment of the present invention, the semiconductor device comprises a first semiconductor chip comprising a first coil, a second semiconductor chip comprising a second coil inductively coupled to the first coil, and an isolating intermediate layer between the first semiconductor chip and the second semiconductor chip.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: March 18, 2014
    Assignee: Infineon Technologies AG
    Inventors: Stefan Willkofer, Uwe Wahl, Bernhard Knott, Markus Hammer, Andreas Strasser
  • Patent number: 8614616
    Abstract: A semiconductor device, a method of manufacturing a semiconductor device and a method for transmitting a signal are disclosed. In accordance with an embodiment of the present invention, the semiconductor device comprises a first semiconductor chip comprising a first coil, a second semiconductor chip comprising a second coil inductively coupled to the first coil, and an isolating intermediate layer between the first semiconductor chip and the second semiconductor chip.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: December 24, 2013
    Assignee: Infineon Technologies AG
    Inventors: Stefan Willkofer, Uwe Wahl, Bernhard Knott, Markus Hammer, Andreas Strasser
  • Publication number: 20130328166
    Abstract: A semiconductor device, a method of manufacturing a semiconductor device and a method for transmitting a signal are disclosed. In accordance with an embodiment of the present invention, the semiconductor device comprises a first semiconductor chip comprising a first coil, a second semiconductor chip comprising a second coil inductively coupled to the first coil, and an isolating intermediate layer between the first semiconductor chip and the second semiconductor chip.
    Type: Application
    Filed: August 14, 2013
    Publication date: December 12, 2013
    Applicant: Infineon Technologies AG
    Inventors: Stefan Willkofer, Uwe Wahl, Bernhard Knott, Markus Hammer, Andreas Strasser