Patents by Inventor Wolfgang Lehnert

Wolfgang Lehnert 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: 20170033011
    Abstract: A method of forming a semiconductor device and a semiconductor device are provided. The method includes providing a wafer stack including a carrier wafer comprising graphite and a device wafer comprising a wide band-gap semiconductor material and having a first side and a second side opposite the first side, the second side being attached to the carrier wafer, defining device regions of the wafer stack, partly removing the carrier wafer so that openings are formed in the carrier wafer arranged within respective device regions and that the device wafer is supported by a residual of the carrier wafer; and further processing the device wafer while the device wafer remains supported by the residual of the carrier wafer.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 2, 2017
    Inventors: Roland Rupp, Wolfgang Lehnert, Francisco Javier Santos Rodriguez, Hans-Joachim Schulze
  • Publication number: 20160260699
    Abstract: A semiconductor disk of a first crystalline material, which has a first lattice system, is bonded on a process surface of a base substrate, wherein a bonding layer is formed between the semiconductor disk and the base substrate. A second semiconductor layer of a second crystalline material with a second, different lattice system is formed by epitaxy on a first semiconductor layer formed from the semiconductor disk.
    Type: Application
    Filed: February 25, 2016
    Publication date: September 8, 2016
    Inventors: Wolfgang Lehnert, Rudolf Berger, Albert Birner, Helmut Brech, Oliver Häberlen, Guenther Ruhl, Roland Rupp
  • Publication number: 20160225856
    Abstract: A composite wafer includes a substrate and a SiC-based functional layer. The substrate includes a porous carbon substrate core and an encapsulating layer encapsulating the substrate core. The SiC-based functional layer comprises, at an interface region with the encapsulating layer, at least one of: a carbide and a silicide formed by reaction of a portion of the SiC-based functional layer with a carbide-and-silicide-forming metal. An amount of the carbide-and-silicide-forming metal, integrated over the thickness of the functional layer, is 10?4 mg/cm2 to 0.1 mg/cm2.
    Type: Application
    Filed: April 12, 2016
    Publication date: August 4, 2016
    Inventors: Rudolf Berger, Hans-Joachim Schulze, Anton Mauder, Wolfgang Lehnert, Günther Ruhl, Roland Rupp
  • Patent number: 9385031
    Abstract: According to one embodiment, a method for processing a semiconductor device is provided including forming a final metal layer forming a passivation layer over the final metal layer and structuring the passivation layer and the final metal layer to form a patterned metal layer and a patterned passivation layer, wherein the patterned metal layer includes a pad region covered by the patterned passivation layer.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: July 5, 2016
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Michael Rogalli, Wolfgang Lehnert
  • Patent number: 9349804
    Abstract: A composite wafer includes a substrate and a SiC-based functional layer. The substrate includes a porous carbon substrate core and an encapsulating layer encapsulating the substrate core. The SiC-based functional layer comprises, at an interface region with the encapsulating layer, at least one of: a carbide and a silicide formed by reaction of a portion of the SiC-based functional layer with a carbide-and-silicide-forming metal. An amount of the carbide-and-silicide-forming metal, integrated over the thickness of the functional layer, is 10?4 mg/cm2 to 0.1 mg/cm2.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: May 24, 2016
    Assignee: Infineon Technologies AG
    Inventors: Rudolf Berger, Hans-Joachim Schulze, Anton Mauder, Wolfgang Lehnert, Günther Ruhl, Roland Rupp
  • Publication number: 20160086844
    Abstract: A composite wafer is manufactured by providing a carrier wafer including graphite and a protective layer, forming a bonding layer, and bonding the carrier wafer to a semiconductor wafer through the bonding layer.
    Type: Application
    Filed: December 8, 2015
    Publication date: March 24, 2016
    Inventors: Rudolf Berger, Hermann Gruber, Wolfgang Lehnert, Guenther Ruhl, Raimund Foerg, Anton Mauder, Hans-Joachim Schulze, Karsten Kellermann, Michael Sommer, Christian Rottmair, Roland Rupp
  • 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
  • Publication number: 20160043164
    Abstract: A method for manufacturing a semiconductor device and a semiconductor device are disclosed. The method comprises forming a trench in a substrate, partially filling the trench with a first semiconductive material, forming an interface along a surface of the first semiconductive material, and filling the trench with a second semiconductive material. The semiconductor device includes a first electrode arranged along sidewalls of a trench and a dielectric arranged over the first electrode. The semiconductor device further includes a second electrode at least partially filling the trench, wherein the second electrode comprises an interface within the second electrode.
    Type: Application
    Filed: October 20, 2015
    Publication date: February 11, 2016
    Inventors: Wolfgang Lehnert, Michael Stadtmueller, Stefan Pompl, Markus Meyer
  • Patent number: 9252045
    Abstract: A composite wafer including a carrier substrate having a graphite core and a monocrystalline semiconductor substrate or layer attached to the carrier substrate and a corresponding method for manufacturing such a composite wafer is provided.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: February 2, 2016
    Assignee: Infineon Technologies AG
    Inventors: Rudolf Berger, Hermann Gruber, Wolfgang Lehnert, Guenther Ruhl, Raimund Foerg, Anton Mauder, Hans-Joachim Schulze
  • 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
  • Patent number: 9224633
    Abstract: According to an embodiment, a composite wafer includes a carrier substrate having a graphite layer and a monocrystalline semiconductor layer attached to the carrier substrate.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: December 29, 2015
    Assignee: Infineon Technologies AG
    Inventors: Rudolf Berger, Hermann Gruber, Wolfgang Lehnert, Guenther Ruhl, Raimund Foerg, Anton Mauder, Hans-Joachim Schulze, Karsten Kellermann, Michael Sommer, Christian Rottmair, Roland Rupp
  • Patent number: 9219049
    Abstract: A compound structure including a carrier wafer and at least one semiconductor piece bonded onto the carrier wafer by a bonding material obtained by a ceramic-forming polymer precursor.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: December 22, 2015
    Assignee: Infineon Technologies AG
    Inventors: Rudolf Berger, Guenther Ruhl, Wolfgang Lehnert, Roland Rupp
  • Publication number: 20150357234
    Abstract: According to one embodiment, a method for processing a semiconductor device is provided including forming a final metal layer forming a passivation layer over the final metal layer and structuring the passivation layer and the final metal layer to form a patterned metal layer and a patterned passivation layer, wherein the patterned metal layer includes a pad region covered by the patterned passivation layer.
    Type: Application
    Filed: August 20, 2015
    Publication date: December 10, 2015
    Inventors: Michael Rogalli, Wolfgang Lehnert
  • Patent number: 9196675
    Abstract: A method for manufacturing a semiconductor device and a semiconductor device are disclosed. The method comprises forming a trench in a substrate, partially filling the trench with a first semiconductive material, forming an interface along a surface of the first semiconductive material, and filling the trench with a second semiconductive material. The semiconductor device includes a first electrode arranged along sidewalls of a trench and a dielectric arranged over the first electrode. The semiconductor device further includes a second electrode at least partially filling the trench, wherein the second electrode comprises an interface within the second electrode.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 24, 2015
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Lehnert, Michael Stadtmueller, Stefan Pompl, Markus Meyer
  • Patent number: 9171728
    Abstract: A method for forming a semiconductor device includes providing a semiconductor body which has a main surface and a first n-type semiconductor region, forming a trench which extends from the main surface into the first n-type semiconductor region, and forming a dielectric layer having fixed negative charges on a surface of the trench, by performing at least one atomic layer deposition using an organometallic precursor.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: October 27, 2015
    Assignee: Infineon Technologies Austria AG
    Inventors: Anton Mauder, Hans-Joachim Schulze, Franz Hirler, Wolfgang Lehnert, Rudolf Berger, Klemens Pruegl, Helmut Strack
  • Patent number: 9165821
    Abstract: According to one embodiment, a method for processing a semiconductor device is provided including forming a final metal layer forming a passivation layer over the final metal layer and structuring the passivation layer and the final metal layer to form a patterned metal layer and a patterned passivation layer, wherein the patterned metal layer includes a pad region covered by the patterned passivation layer.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: October 20, 2015
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Michael Rogalli, Wolfgang Lehnert
  • Publication number: 20150279941
    Abstract: A composite wafer including a carrier substrate having a graphite core and a monocrystalline semiconductor substrate or layer attached to the carrier substrate and a corresponding method for manufacturing such a composite wafer is provided.
    Type: Application
    Filed: May 22, 2015
    Publication date: October 1, 2015
    Inventors: Rudolf Berger, Hermann Gruber, Wolfgang Lehnert, Guenther Ruhl, Raimund Foerg, Anton Mauder, Hans-Joachim Schulze
  • Publication number: 20150194480
    Abstract: In one embodiment a method of forming a compressive polycrystalline semiconductive material layer is disclosed. The method comprises forming a polycrystalline semiconductive seed layer over a substrate and forming a silicon layer by depositing silicon directly on the polycrystalline silicon seed layer under amorphous process conditions at a temperature below 600 C.
    Type: Application
    Filed: March 23, 2015
    Publication date: July 9, 2015
    Inventors: Wolfgang Lehnert, Stefan Pompl, Markus Meyer
  • Publication number: 20150179507
    Abstract: According to one embodiment, a method for processing a semiconductor device is provided including forming a final metal layer forming a passivation layer over the final metal layer and structuring the passivation layer and the final metal layer to form a patterned metal layer and a patterned passivation layer, wherein the patterned metal layer includes a pad region covered by the patterned passivation layer.
    Type: Application
    Filed: December 23, 2013
    Publication date: June 25, 2015
    Applicant: Infineon Technologies AG
    Inventors: Michael Rogalli, Wolfgang Lehnert
  • Publication number: 20150171045
    Abstract: A compound structure including a carrier wafer and at least one semiconductor piece bonded onto the carrier wafer by a bonding material obtained by a ceramic-forming polymer precursor.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 18, 2015
    Inventors: Rudolf Berger, Guenther Ruhl, Wolfgang Lehnert, Roland Rupp