Patents by Inventor Lutz Hoppel

Lutz Hoppel 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: 7981712
    Abstract: A method for producing an optoelectronic semiconductor chip based on a nitride semiconductor system is specified. The method comprises the steps of: forming a semiconductor section with at least one p-doped region; and forming a covering layer disposed downstream of the semiconductor section in a growth direction of the semiconductor chip, said covering layer having at least one n-doped semiconductor layer. An activation step suitable for electrically activating the p-doped region is effected before or during the formation of the covering layer. An optoelectronic semiconductor chip which can be produced by the method is additionally specified.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: July 19, 2011
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Magnus Ahlstedt, Lutz Höppel, Matthias Peter, Matthias Sabathil, Uwe Strauss, Martin Strassburg
  • Publication number: 20110156069
    Abstract: A method for producing an optoelectronic semiconductor chip based on a nitride semiconductor system is specified. The method comprises the steps of: forming a semiconductor section with at least one p-doped region; and forming a covering layer disposed downstream of the semiconductor section in a growth direction of the semiconductor chip, said covering layer having at least one n-doped semiconductor layer. An activation step suitable for electrically activating the p-doped region is effected before or during the formation of the covering layer. An optoelectronic semiconductor chip which can be produced by the method is additionally specified.
    Type: Application
    Filed: January 6, 2011
    Publication date: June 30, 2011
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Magnus AHLSTEDT, Lutz HÖPPEL, Matthias PETER, Matthias SABATHIL, Uwe STRAUSS, Martin STRASSBURG
  • Publication number: 20110101390
    Abstract: An optoelectronic semiconductor body comprises a semiconductor layer sequence which is subdivided into at least two electrically isolated subsegments. The semiconductor layer sequence has an active layer in each subarea. Furthermore, at least three electrical contact pads are provided. A first line level makes contact with a first of the at least two subsegments and with the first contact pad. A second line level makes contact with the second of the at least two subsegments and with a second contact pad. A third line level connects the two subsegments to one another and makes contact with the third contact pad. Furthermore, the line levels are each arranged opposite a first main face, wherein the first main face is intended to emit electromagnetic radiation that is produced.
    Type: Application
    Filed: February 25, 2009
    Publication date: May 5, 2011
    Applicant: OSRAM Opio Semiconductors GmbH
    Inventors: Karl Engl, Frank Singer, Patrick Rode, Lutz Hoppel, Martin Strassburg
  • Publication number: 20110104836
    Abstract: In a method for producing an optoelectronic component, a growth substrate having a first coefficient of thermal expansion is provided. A multilayered buffer layer sequence is applied thereto. A layer sequence having a second coefficient of thermal expansion—different than the first coefficient of thermal expansion—is subsequently deposited epitaxially. It furthermore comprises an active layer for emitting electromagnetic radiation. A carrier substrate is subsequently applied on the epitaxially deposited layer sequence. The growth substrate is removed and the multilayered buffer layer sequence is structured in order to increase a coupling-out of electromagnetic radiation. Finally, contact is made with the epitaxially deposited layer sequence.
    Type: Application
    Filed: June 9, 2009
    Publication date: May 5, 2011
    Inventors: Patrick Rode, Martin Strassburg, Karl Engl, Lutz Höppel
  • Publication number: 20090090900
    Abstract: An optoelectronic semiconductor chip comprises the following sequence of regions in a growth direction (c) of the semiconductor chip (20): a p-doped barrier layer (1) for an active region (2), the active region (2), which is suitable for generating electromagnetic radiation, the active region being based on a hexagonal compound semiconductor, and an n-doped barrier layer (3) for the active region (2). Also disclosed are a component comprising such a semiconductor chip, and a method for producing such a semiconductor chip.
    Type: Application
    Filed: July 28, 2006
    Publication date: April 9, 2009
    Applicant: Osram Opto Semiconductors GmbH
    Inventors: Adrian Avramescu, Volker Harle, Lutz Hoppel, Matthias Peter, Matthias Sabathil, Uwe Strauss
  • Publication number: 20080203407
    Abstract: A method for producing an optoelectronic semiconductor chip based on a nitride semiconductor system is specified. The method comprises the steps of: forming a semiconductor section with at least one p-doped region; and forming a covering layer disposed downstream of the semiconductor section in a growth direction of the semiconductor chip, said covering layer having at least one n-doped semiconductor layer. An activation step suitable for electrically activating the p-doped region is effected before or during the formation of the covering layer. An optoelectronic semiconductor chip which can be produced by the method is additionally specified.
    Type: Application
    Filed: January 25, 2008
    Publication date: August 28, 2008
    Applicant: OSRAM Opto Semiconductor GmbH
    Inventors: Magnus Ahlstedt, Lutz Hoppel, Matthias Peter, Matthias Sabathil, Uwe Strauss, Martin Strassburg
  • Publication number: 20080073655
    Abstract: An optoelectronic semiconductor chip comprises a growth substrate with a structured growth area (2) having a multiplicity of elevations (4) and depressions (3), and an active layer sequence (5) applied to the growth area (2).
    Type: Application
    Filed: September 17, 2007
    Publication date: March 27, 2008
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Tony Albrecht, Georg Bruderl, Volker Harle, Lutz Hoppel, Martin Strassburg