Patents by Inventor Ramona Eberhardt

Ramona Eberhardt 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: 9815262
    Abstract: The invention relates to a method of joining substrates. It is the object of the invention in this respect to join substrates of substrate materials together without having to exert an increased effort for a coating with additional coating processes to be carried out and to be able to achieve a good quality of the join connection in so doing. In the method in accordance with the invention a pretreatment of at least one join surface of a substrate to be joined is carried out in low pressure oxygen plasma prior to the actual joining. On the joining, a contact force acts on the substrates to be joined in the range 2 kPa to 5 MPa and in this process a heat treatment is carried out at an elevated temperature of at least 100° C. and at under pressure conditions of a maximum of 10 mbar, preferably <10?3 mbar.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: November 14, 2017
    Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität Jena
    Inventors: Gerhard Kalkowski, Carolin Rothhardt, Mathias Rohde, Ramona Eberhardt
  • Patent number: 9550696
    Abstract: The invention relates to a method of producing lightweight structural elements which are produced as a composition construction element having at least one cover plate and one carrier element which are connected to one another. A carrier element, at which at least one apertures and/or at least one cut-out is/are formed and at least one further element, which is a cover plate, are connected to one another. A carrier element and at least one cover plate can be formed from a glass, a glass ceramic material, a ceramic material and/or silicon having an oxide surface layer which is formed at least in the bonding region of the elements to be connected to one another. The carrier element should have at least a double thickness with respect to the thickness of a cover plate.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: January 24, 2017
    Assignee: FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAANDTEN FORSCHUNG E.V.
    Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
  • Patent number: 9233873
    Abstract: The present invention pertains to a process for the silicate bonding of joined surfaces, facing one another, of two components by means of an aqueous, alkaline, silicon-cation-containing joining solution for the purpose of producing an optical element, characterized in that one or both of said joined surfaces (1; 2b; 10) are covered with a layer of an oxide (3), which has a higher refractive index than SiO2 and is selected from among oxides of the third and fourth main group elements, of the second and third group of the transition elements as well as zirconium and from among mixed oxides of the said elements, whereupon the joining solution is applied to at least one of the surfaces to be joined and the surfaces are bonded to one another.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: January 12, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Gerhard Kalkowski, Simone Fabian, Charlotte Jahnke, Ramona Eberhardt, Mark Schuermann
  • Patent number: 8778121
    Abstract: The present invention relates to a method for laser-assisted bonding of substrates, in which these are connected together firstly frictionally by pressing together and subsequently strengthening of the connection between the substrates is effected by activation in regions which is induced by laser irradiation. The invention likewise relates to substrates produced accordingly.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: July 15, 2014
    Assignees: Fraunhofer-Gesellschaft zur der Andewandten, Friedrich-Schiller-Universtaet Jena
    Inventors: Andreas Tuennermann, Ramona Eberhardt, Gerhard Kalkowski, Stefan Nolte
  • Publication number: 20140083597
    Abstract: The invention relates to a method of joining substrates. It is the object of the invention in this respect to join substrates of substrate materials together without having to exert an increased effort for a coating with additional coating processes to be carried out and to be able to achieve a good quality of the join connection in so doing. In the method in accordance with the invention a pretreatment of at least one join surface of a substrate to be joined is carried out in low pressure oxygen plasma prior to the actual joining. On the joining, a contact force acts on the substrates to be joined in the range 2 kPa to 5 MPa and in this process a heat treatment is carried out at an elevated temperature of at least 100° C. and at under pressure conditions of a maximum of 10 mbar, preferably <10?3 mbar.
    Type: Application
    Filed: February 21, 2012
    Publication date: March 27, 2014
    Applicants: Friedrich-Schiller-Universität Jena, FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
    Inventors: Gerhard Kalkowski, Carolin Rothhardt, Mathias Rohde, Ramona Eberhardt
  • Publication number: 20130327093
    Abstract: The invention relates to a method of producing lightweight structural elements which are produced as a composition construction element having at least one cover plate and one carrier element which are connected to one another. A carrier element, at which at least one apertures and/or at least one cut-out is/are formed and at least one further element, which is a cover plate, are connected to one another. A carrier element and at least one cover plate can be formed from a glass, a glass ceramic material, a ceramic material and/or silicon having an oxide surface layer which is formed at least in the bonding region of the elements to be connected to one another. The carrier element should have at least a double thickness with respect to the thickness of a cover plate.
    Type: Application
    Filed: February 9, 2012
    Publication date: December 12, 2013
    Applicant: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.
    Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
  • Publication number: 20130048214
    Abstract: The present invention pertains to a process for the silicate bonding of joined surfaces, facing one another, of two components by means of an aqueous, alkaline, silicon-cation-containing joining solution for the purpose of producing an optical element, characterized in that one or both of said joined surfaces (1; 2b; 10) are covered with a layer of an oxide (3), which has a higher refractive index than SiO2 and is selected from among oxides of the third and fourth main group elements, of the second and third group of the transition elements as well as zirconium and from among mixed oxides of the said elements, whereupon the joining solution is applied to at least one of the surfaces to be joined and the surfaces are bonded to one another.
    Type: Application
    Filed: May 9, 2011
    Publication date: February 28, 2013
    Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewan Forschung e.V.
    Inventors: Gerhard Kalkowski, Simone Fabian, Charlotte Jahnke, Ramona Eberhardt, Mark Schuermann
  • Publication number: 20110100066
    Abstract: A device for joining and tapering optical components such as fibers includes a retaining device for holding optical components in a processing site, a laser radiation source for emitting a laser beam and beam forming elements for guiding the laser beam to the processing site. At least a first beam forming element is inserted into the beam path of the laser radiation source for producing a radiation having the form of an annulus and a second beam forming element is provided for specifying the angle of incidence of the radiation having the form of an annulus onto the optical components at the processing site.
    Type: Application
    Filed: May 19, 2009
    Publication date: May 5, 2011
    Inventors: Steffen Böhme, Thomas Peschel, Ramona Eberhardt, Andreas Tünnermann, Jens Limpert
  • Publication number: 20100304151
    Abstract: The present invention relates to a method for laser-assisted bonding of substrates, in which these are connected together firstly frictionally by pressing together and subsequently strengthening of the connection between the substrates is effected by activation in regions which is induced by laser irradiation. The invention likewise relates to substrates produced accordingly.
    Type: Application
    Filed: February 21, 2008
    Publication date: December 2, 2010
    Applicant: Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.
    Inventors: Andreas Tuennermann, Ramona Eberhardt, Gerhard Kalkowski, Stefan Nolte
  • Publication number: 20100288422
    Abstract: The present invention relates to a method for joining two or more components made of glass, ceramic, and/or glass ceramic, using a soluble glass joining solution having sodium, potassium, and/or lithium ions and/or a silica sol, the joining solution being applied to joint surfaces between the components to be joined and solidified at mild temperatures, the method being either characterized in that the joining solution comprises an additive selected among boric acid, boron compounds from which boric acid can result by hydrolysis, aluminum acetates, aluminum silicate/NH3/H2O titanium compounds forming titanium hydroxy cations, water-soluble zinc compounds, water-soluble zircon compounds, and water-soluble yttrium compounds, wherein said additive is added in an amount that reduces the pH value of the underlying soluble glass, and/or characterized in that, after the joining solution is applied and the components to be joined are brought together and fixed, the joined components are dried by removing water at room
    Type: Application
    Filed: December 12, 2008
    Publication date: November 18, 2010
    Inventors: Manfred Krauss, Gudrun Leopoldsberger, Gerhard Kalkowski, Ramona Eberhardt, Andreas Tuennermann, Charlotte Jahnke, Simone Fabian