Patents by Inventor Helmut Oefner

Helmut Oefner 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: 9536838
    Abstract: An embodiment of a method of manufacturing semiconductor wafers comprises forming a notch or a flat in a semiconductor ingot extending along an axial direction. A plurality of markings are formed in the semiconductor ingot. At least some of the plurality of markings at different positions along the axial direction are distinguishable from each other by a characteristic feature. The semiconductor ingot is then sliced into semiconductor wafers.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: January 3, 2017
    Assignee: Infineon Technologies AG
    Inventors: Johannes Freund, Helmut Oefner, Hans-Joachim Schulze
  • Publication number: 20160293712
    Abstract: A semiconductor wafer includes first and second main surfaces opposite to each other along a vertical direction, and a side surface encircling the semiconductor wafer. A lateral distance perpendicular to the vertical direction between the side surface and a center of the semiconductor wafer includes first and second parts. The first part extends from the side surface to the second part and the second part extends from the first part to the center. An average concentration of at least one of nitrogen and oxygen in the first part is greater than 5×1014 cm?3 and exceeds an average concentration of the at least one of nitrogen and oxygen in the second part by more than 20% of the average concentration of the at least one of nitrogen and oxygen in the second part.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 6, 2016
    Inventors: Hans-Joachim Schulze, Helmut Oefner
  • Publication number: 20160141399
    Abstract: A method for forming a semiconductor device comprises implanting a defined dose of protons into a semiconductor substrate and tempering the semiconductor substrate according to a defined temperature profile. At least one of the defined dose of protons and the defined temperature profile is selected depending on a carbon-related parameter indicating information on a carbon concentration within at least a part of the semiconductor substrate.
    Type: Application
    Filed: November 9, 2015
    Publication date: May 19, 2016
    Inventors: Moriz Jelinek, Johannes Georg Laven, Helmut Oefner, Hans-Joachim Schulze, Schustereder
  • Publication number: 20160104622
    Abstract: A method for manufacturing a substrate wafer 100 includes providing a device wafer (110) having a first side (111) and a second side (112); subjecting the device wafer (110) to a first high temperature process for reducing the oxygen content of the device wafer (110) at least in a region (112a) at the second side (112); bonding the second side (112) of the device wafer (110) to a first side (121) of a carrier wafer (120) to form a substrate wafer (100); processing the first side (101) of the substrate wafer (100) to reduce the thickness of the device wafer (110); subjecting the substrate wafer (100) to a second high temperature process for reducing the oxygen content at least of the device wafer (110); and at least partially integrating at least one semiconductor component (140) into the device wafer (110) after the second high temperature process.
    Type: Application
    Filed: September 28, 2015
    Publication date: April 14, 2016
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Helmut Oefner, Nico Caspary, Mohammad Momeni, Reinhard Ploss, Francisco Javier Santos Rodriguez, Hans-Joachim Schulze
  • Patent number: 9312120
    Abstract: A method for processing a semiconductor body is disclosed. In an embodiment, the method includes reducing an oxygen concentration in a silicon wafer in a first region adjoining a first surface of the silicon wafer by a first heat treatment, creating vacancies in a crystal lattice of the wafer at least in a second region adjoining the first region by implanting particles via the first surface into the wafer and forming oxygen precipitates in the second region by a second heat treatment.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 12, 2016
    Assignee: Infineon Technologies AG
    Inventors: Hans-Joachim Schulze, Helmut Oefner
  • Publication number: 20160099186
    Abstract: A method for treating a semiconductor wafer having a basic doping is disclosed. The method includes determining a doping concentration of the basic doping, and adapting the basic doping of the semiconductor wafer by postdoping. The postdoping includes at least one of the following methods: a proton implantation and a subsequent thermal process for producing hydrogen induced donors. In this case, at least one of the following parameters is dependent on the determined doping concentration of the basic doping: an implantation dose of the proton implantation, and a temperature of the thermal process.
    Type: Application
    Filed: December 9, 2015
    Publication date: April 7, 2016
    Inventors: Reinhard Ploss, Helmut Oefner, Hans-Joachim Schulze
  • Publication number: 20160064206
    Abstract: A method for processing a semiconductor body is disclosed. In an embodiment, the method includes reducing an oxygen concentration in a silicon wafer in a first region adjoining a first surface of the silicon wafer by a first heat treatment, creating vacancies in a crystal lattice of the wafer at least in a second region adjoining the first region by implanting particles via the first surface into the wafer and forming oxygen precipitates in the second region by a second heat treatment.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 3, 2016
    Inventors: Hans-Joachim Schulze, Helmut Oefner
  • Patent number: 9245811
    Abstract: A method for treating a semiconductor wafer having a basic doping is disclosed. The method includes determining a doping concentration of the basic doping, and adapting the basic doping of the semiconductor wafer by postdoping. The postdoping includes at least one of the following methods: a proton implantation and a subsequent thermal process for producing hydrogen induced donors, and a neutron irradiation. In this case, at least one of the following parameters is dependent on the determined doping concentration of the basic doping: an implantation dose of the proton implantation, a temperature of the thermal process, and an irradiation dose of the neutron irradiation.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: January 26, 2016
    Assignee: Infineon Technologies AG
    Inventors: Reinhard Ploss, Helmut Oefner, Hans-Joachim Schulze
  • Publication number: 20150371858
    Abstract: A Magnetic Czochralski semiconductor wafer having opposing first and second sides arranged distant from one another in a first vertical direction is treated by implanting first particles into the semiconductor wafer via the second side to form crystal defects in the semiconductor wafer. The crystal defects have a maximum defect concentration at a first depth. The semiconductor wafer is heated in a first thermal process to form radiation induced donors. Implantation energy and dose are chosen such that the semiconductor wafer has, after the first thermal process, an n-doped semiconductor region arranged between the second side and first depth, and the n-doped semiconductor region has, in the first vertical direction, a local maximum of a net doping concentration between the first depth and second side and a local minimum of the net doping concentration between the first depth and first maximum.
    Type: Application
    Filed: June 24, 2014
    Publication date: December 24, 2015
    Inventors: Johannes Laven, Hans-Joachim Schulze, Stephan Voss, Alexander Breymesser, Alexander Susiti, Shuhai Liu, Helmut Oefner
  • Publication number: 20150050754
    Abstract: A method for treating a semiconductor wafer having a basic doping is disclosed. The method includes determining a doping concentration of the basic doping, and adapting the basic doping of the semiconductor wafer by postdoping. The postdoping includes at least one of the following methods: a proton implantation and a subsequent thermal process for producing hydrogen induced donors, and a neutron irradiation. In this case, at least one of the following parameters is dependent on the determined doping concentration of the basic doping: an implantation dose of the proton implantation, a temperature of the thermal process, and an irradiation dose of the neutron irradiation.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 19, 2015
    Inventors: Reinhard Ploss, Helmut Oefner, Hans-Joachim Schulze