Patents by Inventor Markus Graul

Markus Graul 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: 20240234626
    Abstract: In an embodiment a method for producing an optoelectronic semiconductor component includes A) providing a semiconductor body comprising, sequentially in a vertical direction, a first layer of a first conductivity type, an active layer formed as a quantum well structure provided for emission of electromagnetic radiation, and a second layer of a second conductivity type and B) irradiating the semiconductor body with a focused electromagnetic radiation such that a focus region of the electromagnetic radiation lies within the active layer and overlaps with the quantum well structure, wherein the electromagnetic radiation has an intensity which is sufficiently large in the focus region to cause point defects in the quantum well structure so that a defect region is formed and so that a generation of the point defects is limited to the focus region, and wherein a density of point defects in the first layer and the second layer is not changed in B).
    Type: Application
    Filed: February 23, 2022
    Publication date: July 11, 2024
    Inventors: Jens Ebbecke, Kristina Schelestow, Markus Graul, Hans-Joachim Meyer, Richard Floeter
  • Publication number: 20240136468
    Abstract: In an embodiment a method for producing an optoelectronic semiconductor component includes A) providing a semiconductor body comprising, sequentially in a vertical direction, a first layer of a first conductivity type, an active layer formed as a quantum well structure provided for emission of electromagnetic radiation, and a second layer of a second conductivity type and B) irradiating the semiconductor body with a focused electromagnetic radiation such that a focus region of the electromagnetic radiation lies within the active layer and overlaps with the quantum well structure, wherein the electromagnetic radiation has an intensity which is sufficiently large in the focus region to cause point defects in the quantum well structure so that a defect region is formed and so that a generation of the point defects is limited to the focus region, and wherein a density of point defects in the first layer and the second layer is not changed in B).
    Type: Application
    Filed: February 23, 2022
    Publication date: April 25, 2024
    Inventors: Jens Ebbecke, Kristina Schelestow, Markus Graul, Hans-Joachim Meyer, Richard Floeter
  • Patent number: 9705057
    Abstract: In a method for producing a laser diode, a number of laser diodes are produced on a wafer. The wafer is broken down into wafer pieces, each wafer piece having a plurality of laser diodes being arranged side by side. One wafer piece is inserted into a first mount that includes a first covering element overlapping a front face of the wafer piece and shadowing a bottom area of the front face of the wafer piece. A minor layer is deposited on an unshadowed upper area of the wafer piece's front face. The wafer piece is inserted into a second mount, which includes a second covering element that shadows the minor layer of the upper area of the front face. An electrically conductive contact layer is deposited on an unshadowed bottom area of the wafer piece's front face. The wafer piece is subsequently broken down into individual laser diodes.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: July 11, 2017
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Roland Enzmann, Stephan Haneder, Tomasz Swietlik, Christoph Walter, Andreas Rozynski, Markus Graul, Karsten Auen, Jürgen Dachs
  • Patent number: 9608401
    Abstract: Method for producing semiconductor laser elements (1) comprises A) providing a carrier composite (20) having a plurality of carriers (2) for the semiconductor laser elements (1), B) providing a laser bar (30) having a plurality of semiconductor laser diodes (3) which comprise a common growth substrate (31) and a semiconductor layer sequence (32) grown thereon, C) generating predetermined breaking points (35) on a substrate underside (34) of the growth substrate (31), said substrate underside facing away from the semiconductor layer sequence (32), D) attaching the laser bar (30) to a carrier upper side (23) of the carrier composite (20), wherein the attachment is performed at an elevated temperature and is followed by cooling, and E) singulating into the semiconductor laser elements (1), wherein steps B) to E) are performed in the indicated sequence.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: March 28, 2017
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Roland Enzmann, Markus Horn, Markus Graul, Thomas Veit, Juergen Dachs, Stefan Listl, Markus Arzberger
  • Patent number: 9450376
    Abstract: A method of producing a semiconductor laser element includes A) providing at least one carrier assemblage having a multiplicity of carriers for the semiconductor laser elements, C) providing at least one laser bar having a multiplicity of semiconductor laser diodes which include a common growth substrate and a semiconductor layer sequence grown thereon, D) fitting the laser bar on a top side of the carrier assemblage, and E) singulating to form the semiconductor laser elements after D).
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: September 20, 2016
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Roland Enzmann, Stephan Haneder, Markus Arzberger, Christoph Walter, Tomasz Swietlik, Harald König, Robin Fehse, Mathias Kämpf, Markus Graul, Markus Horn
  • Publication number: 20150349487
    Abstract: Method for producing semiconductor laser elements (1) comprises A) providing a carrier composite (20) having a plurality of carriers (2) for the semiconductor laser elements (1), B) providing a laser bar (30) having a plurality of semiconductor laser diodes (3) which comprise a common growth substrate (31) and a semiconductor layer sequence (32) grown thereon, C) generating predetermined breaking points (35) on a substrate underside (34) of the growth substrate (31), said substrate underside facing away from the semiconductor layer sequence (32), D) attaching the laser bar (30) to a carrier upper side (23) of the carrier composite (20), wherein the attachment is performed at an elevated temperature and is followed by cooling, and E) singulating into the semiconductor laser elements (1), wherein steps B) to E) are performed in the indicated sequence.
    Type: Application
    Filed: December 17, 2013
    Publication date: December 3, 2015
    Inventors: Roland ENZMANN, Markus HORN, Markus GRAUL, Thomas VEIT, Juergen DACHS, Stefan LISTL, Markus ARZBERGER
  • Publication number: 20150228871
    Abstract: In a method for producing a laser diode, a number of laser diodes are produced on a wafer. The wafer is broken down into wafer pieces, each wafer piece having a plurality of laser diodes being arranged side by side. One wafer piece is inserted into a first mount that includes a first covering element overlapping a front face of the wafer piece and shadowing a bottom area of the front face of the wafer piece. A minor layer is deposited on an unshadowed upper area of the wafer piece's front face. The wafer piece is inserted into a second mount, which includes a second covering element that shadows the minor layer of the upper area of the front face. An electrically conductive contact layer is deposited on an unshadowed bottom area of the wafer piece's front face. The wafer piece is subsequently broken down into individual laser diodes.
    Type: Application
    Filed: August 27, 2013
    Publication date: August 13, 2015
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Roland Enzmann, Stephan Haneder, Tomasz Swietlik, Christoph Walter, Andreas Rozynski, Markus Graul, Karsten Auen, Jürgen Dachs
  • Publication number: 20150207293
    Abstract: A method of producing a semiconductor laser element includes A) providing at least one carrier assemblage having a multiplicity of carriers for the semiconductor laser elements, C) providing at least one laser bar having a multiplicity of semiconductor laser diodes which include a common growth substrate and a semiconductor layer sequence grown thereon, D) fitting the laser bar on a top side of the carrier assemblage, and E) singulating to form the semiconductor laser elements after D).
    Type: Application
    Filed: August 12, 2013
    Publication date: July 23, 2015
    Inventors: Roland Enzmann, Stephan Haneder, Markus Arzberger, Christoph Walter, Tomasz Swietlik, Harald König, Robin Fehse, Mathias Kämpf, Markus Graul, Markus Horn