Patents by Inventor Lise Lahourcade

Lise Lahourcade 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: 11329193
    Abstract: An optoelectronic semiconductor component and a method for producing an optoelectronic semiconductor component are disclosed.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: May 10, 2022
    Assignee: OSRAM OLED GMBH
    Inventors: Xiaojun Chen, Alexander Frey, Philipp Drechsel, Thomas Lehnhardt, Lise Lahourcade, Jürgen Off
  • Patent number: 11018277
    Abstract: A semiconductor layer sequence and a method for producing a semiconductor layer sequence are disclosed. In an embodiment a semiconductor layer sequence includes a first nitridic compound semiconductor layer, an intermediate layer, a second nitridic compound semiconductor layer and an active layer, wherein the intermediate layer comprises an AlGaN layer with an Al content of at least 5%, wherein the second nitridic compound semiconductor layer has a lower proportion of Al than the AlGaN layer such that relaxed lattice constants of the AlGaN layer of the intermediate layer and of the second nitridic compound semiconductor layer differ, wherein the second nitridic compound semiconductor layer and the active layer are grown on the intermediate layer in a lattice-matched manner, wherein the active layer comprises one or more layers of AlInGaN, and wherein an In content in each of the layers of AlInGaN is at most 12%.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 25, 2021
    Assignee: OSRAM OLED GMBH
    Inventors: Werner Bergbauer, Lise Lahourcade, Jürgen Off
  • Patent number: 10950752
    Abstract: A method of producing a radiation-emitting semiconductor chip includes providing a growth substrate, epitaxially growing a buffer layer on the growth substrate such that a plurality of V-pits is generated in the buffer layer, epitaxially growing a radiation-generating active semiconductor layer sequence on the buffer layer, wherein the structure of the V-pits continues into the active semiconductor layer sequence, epitaxially growing a further layer sequence on the active semiconductor layer sequence, wherein the structure of the V-pits continues into the further layer sequence, selectively removing the further layer sequence from facets of the V-pits, wherein the further layer sequence remains on a main surface of the active semiconductor layer sequence, and epitaxially growing a p-doped semiconductor layer that completely or partially fills the V-pits.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: March 16, 2021
    Assignee: OSRAM OLED GmbH
    Inventors: Werner Bergbauer, Thomas Lehnhardt, Jürgen Off, Lise Lahourcade, Philipp Drechsel
  • Patent number: 10862003
    Abstract: A component having an enhanced efficiency and a method for producing a component are disclosed. In an embodiment, a component includes a semiconductor layer sequence comprising a p-conducting semiconductor layer, an n-conducting semiconductor layer and an active zone located therebetween, wherein the active zone comprises recesses on a side of the p-conducting semiconductor layer, each recess having facets extending obliquely to a main surface of the active zone, and wherein the p-conducting semiconductor layer extends into the recesses, and a barrier structure, wherein the active zone is arranged between the barrier structure and the n-conducting semiconductor layer so that an injection of positively charged charge carriers into the active zone via the main surface is hindered in a targeted manner so that an injection of positively charged charge carriers into the active zone via the facets is promoted.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: December 8, 2020
    Assignee: OSRAM OLD GMBH
    Inventors: Thomas Lehnhardt, Werner Bergbauer, Jürgen Off, Lise Lahourcade, Philipp Drechsel
  • Publication number: 20200365765
    Abstract: An optoelectronic semiconductor component and a method for producing an optoelectronic semiconductor component are disclosed.
    Type: Application
    Filed: October 19, 2018
    Publication date: November 19, 2020
    Inventors: Xiaojun Chen, Alexander Frey, Philipp Drechsel, Thomas Lehnhardt, Lise Lahourcade, Jürgen Off
  • Publication number: 20200243716
    Abstract: A method of producing a radiation-emitting semiconductor chip includes providing a growth substrate, epitaxially growing a buffer layer on the growth substrate such that a plurality of V-pits is generated in the buffer layer, epitaxially growing a radiation-generating active semiconductor layer sequence on the buffer layer, wherein the structure of the V-pits continues into the active semiconductor layer sequence, epitaxially growing a further layer sequence on the active semiconductor layer sequence, wherein the structure of the V-pits continues into the further layer sequence, selectively removing the further layer sequence from facets of the V-pits, wherein the further layer sequence remains on a main surface of the active semiconductor layer sequence, and epitaxially growing a p-doped semiconductor layer that completely or partially fills the V-pits.
    Type: Application
    Filed: February 22, 2017
    Publication date: July 30, 2020
    Inventors: Werner Bergbauer, Thomas Lehnhardt, Jürgen Off, Lise Lahourcade, Philipp Drechsel
  • Publication number: 20200119227
    Abstract: A semiconductor layer sequence and a method for producing a semiconductor layer sequence are disclosed. In an embodiment a semiconductor layer sequence includes a first nitridic compound semiconductor layer, an intermediate layer, a second nitridic compound semiconductor layer and an active layer, wherein the intermediate layer comprises an AlGaN layer with an Al content of at least 5%, wherein the second nitridic compound semiconductor layer has a lower proportion of Al than the AlGaN layer such that relaxed lattice constants of the AlGaN layer of the intermediate layer and of the second nitridic compound semiconductor layer differ, wherein the second nitridic compound semiconductor layer and the active layer are grown on the intermediate layer in a lattice-matched manner, wherein the active layer comprises one or more layers of AlInGaN, and wherein an In content in each of the layers of AlInGaN is at most 12%.
    Type: Application
    Filed: October 24, 2017
    Publication date: April 16, 2020
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Werner BERGBAUER, Lise LAHOURCADE, Jürgen OFF
  • Publication number: 20200119228
    Abstract: A component having an enhanced efficiency and a method for producing a component are disclosed. In an embodiment, a component includes a semiconductor layer sequence comprising a p-conducting semiconductor layer, an n-conducting semiconductor layer and an active zone located therebetween, wherein the active zone comprises recesses on a side of the p-conducting semiconductor layer, each recess having facets extending obliquely to a main surface of the active zone, and wherein the p-conducting semiconductor layer extends into the recesses, and a barrier structure, wherein the active zone is arranged between the barrier structure and the n-conducting semiconductor layer so that an injection of positively charged charge carriers into the active zone via the main surface is hindered in a targeted manner so that an injection of positively charged charge carriers into the active zone via the facets is promoted.
    Type: Application
    Filed: May 18, 2017
    Publication date: April 16, 2020
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Thomas Lehnhardt, Werner Bergbauer, Jürgen Off, Lise Lahourcade, Philipp Drechsel
  • Publication number: 20130240026
    Abstract: The disclosure provides semiconductive material derived from group IV elements that are useful for photovoltaic applications.
    Type: Application
    Filed: September 1, 2012
    Publication date: September 19, 2013
    Applicant: THE CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Harry A. Atwater, Naomi Coronel, Lise Lahourcade