Patents by Inventor Gerhard Kalkowski
Gerhard Kalkowski 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).
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Patent number: 9815262Abstract: 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: GrantFiled: February 21, 2012Date of Patent: November 14, 2017Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität JenaInventors: Gerhard Kalkowski, Carolin Rothhardt, Mathias Rohde, Ramona Eberhardt
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Patent number: 9550696Abstract: 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: GrantFiled: February 9, 2012Date of Patent: January 24, 2017Assignee: FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAANDTEN FORSCHUNG E.V.Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
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Patent number: 9233873Abstract: 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: GrantFiled: May 9, 2011Date of Patent: January 12, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Simone Fabian, Charlotte Jahnke, Ramona Eberhardt, Mark Schuermann
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Patent number: 8778121Abstract: 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: GrantFiled: February 21, 2008Date of Patent: July 15, 2014Assignees: Fraunhofer-Gesellschaft zur der Andewandten, Friedrich-Schiller-Universtaet JenaInventors: Andreas Tuennermann, Ramona Eberhardt, Gerhard Kalkowski, Stefan Nolte
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Publication number: 20140083597Abstract: 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: ApplicationFiled: February 21, 2012Publication date: March 27, 2014Applicants: Friedrich-Schiller-Universität Jena, FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Carolin Rothhardt, Mathias Rohde, Ramona Eberhardt
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Publication number: 20130327093Abstract: 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: ApplicationFiled: February 9, 2012Publication date: December 12, 2013Applicant: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
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Publication number: 20130048214Abstract: 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: ApplicationFiled: May 9, 2011Publication date: February 28, 2013Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewan Forschung e.V.Inventors: Gerhard Kalkowski, Simone Fabian, Charlotte Jahnke, Ramona Eberhardt, Mark Schuermann
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Patent number: 8274640Abstract: Flexibly deformable holding elements operate such that substrates can be held in a fixed manner at a surface of the holding element electrostatically or also by use of negative pressure and planar positional deviations or unwanted deformations can be compensated simply and reliably, where at least one cut-out having an opening arranged at the rear side is formed at the rear side of the holding element which is disposed opposite the surface, and an actuator is arranged there exerting compressive forces or pulling forces for a widening or narrowing of the cut-out and/or for a deformation of the holding element.Type: GrantFiled: September 23, 2009Date of Patent: September 25, 2012Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Stefan Risse, Thomas Peschel, Christoph Damm
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Patent number: 8081317Abstract: The embodiments disclosed herein relate to an electrostatic chuck, or an optically structured element or an optical mask that comprise a metal film as well as a transparent cover applied on a substrate. At least two anti-reflective films are inserted between the metal film and the cover that reduce the reflectance of the metal film, as viewed from the surface, to almost zero. As a result, a direct interferometer measurement of the surface structure of the transparent cover is possible. Methods of measurement and of use are also disclosed.Type: GrantFiled: May 6, 2009Date of Patent: December 20, 2011Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Olaf Stenzel, Wieland Stöckl
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Publication number: 20100304151Abstract: 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: ApplicationFiled: February 21, 2008Publication date: December 2, 2010Applicant: Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.Inventors: Andreas Tuennermann, Ramona Eberhardt, Gerhard Kalkowski, Stefan Nolte
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Publication number: 20100288422Abstract: 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 roomType: ApplicationFiled: December 12, 2008Publication date: November 18, 2010Inventors: Manfred Krauss, Gudrun Leopoldsberger, Gerhard Kalkowski, Ramona Eberhardt, Andreas Tuennermann, Charlotte Jahnke, Simone Fabian
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Publication number: 20100265485Abstract: Flexibly deformable holding elements operate such that substrates can be held in a fixed manner at a surface of the holding element electrostatically or also by means of negative pressure and planar positional deviations or unwanted deformations can be compensated simply and reliably, where at least one cut-out having an opening arranged at the rear side is formed at the rear side of the holding element which is disposed opposite the surface, and an actuator is arranged there exerting compressive forces or pulling forces for a widening or narrowing of the cut-out and/or for a deformation of the holding element.Type: ApplicationFiled: September 23, 2009Publication date: October 21, 2010Applicant: Frauhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Stefan Risse, Thomas Peschel, Christoph Damm
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Publication number: 20100046005Abstract: The invention relates to a device for the contactless detection of a three-dimensional contour, comprising a projector with an imaging element and a projection lens for depicting a stripe pattern that is generated on the imaging element in an object space. The invention further comprises a camera arrangement for the surveillance of the object space from two different directions, having two camera lenses. The projector and the camera arrangement are housed together in a measurement head that can be handheld. The invention further relates to a method for detecting a three-dimensional contour using said device.Type: ApplicationFiled: October 16, 2007Publication date: February 25, 2010Applicant: Fraunhofer-Gesellschaft zur Forderung der angewand ten Forschung e.V.Inventors: Gerhard Kalkowski, Olaf Stenzel, Wieland Stöckl
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Publication number: 20090279101Abstract: The embodiments disclosed herein relate to an electrostatic chuck, or an optically structured element or an optical mask that comprise a metal film as well as a transparent cover applied on a substrate. At least two anti-reflective films are inserted between the metal film and the cover that reduce the reflectance of the metal film, as viewed from the surface, to almost zero. As a result, a direct interferometer measurement of the surface structure of the transparent cover is possible. Methods measurement and of use are also disclosed.Type: ApplicationFiled: May 6, 2009Publication date: November 12, 2009Applicant: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Olaf Stenzel, Wieland Stockl
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Patent number: 6426860Abstract: The present invention provides for a device for holding a substrate in an exposure system. In the exposure system, the substrate is positioned on a table movable in the X and Y coordinates of an X, Y plane, and the exposure system provides a metering assembly between a table surface and the substrate to adjust the distance and to align the substrate in relation to an exposure optics, from where a corpuscular radiation is directed right-angled onto a substrate surface, corresponding to the Z coordinate. The device for holding the substrate includes two mounting plates aligned parallel to the X, Y plane, adjusted upon the table in a direction to the exposure optics and with different distances to the table surface, the first mounting plate of which being directly connected to the table.Type: GrantFiled: September 19, 2000Date of Patent: July 30, 2002Assignee: Leica Microsystems Lithography GmbHInventors: Gerhard Schubert, Ulf-Carsten Kirschstein, Stefan Risse, Gerd Harnisch, Gerhard Kalkowski, Volker Guyenot