Patents by Inventor Andreas Grohe
Andreas Grohe 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: 11848541Abstract: A spectral beam combiner is based upon a specialized diffraction grating that is intentionally configured to create output signals along two separate paths, each path supporting a spectrally-combined beam. One path supports the propagation of a majority of the spectrally-combined beam (e.g., 80-95%) and is defined as the output path from the beam combiner. The remainder of the spectrally-combined beam is directed along a separate path and into an external cavity arrangement used to perform wavelength stabilization. Either reflective or transmissive diffraction gratings may be used, with different diffraction orders and/or polarization states of the spectrally-combined optical beam used to create the output beam and the separate wavelength stabilization feedback beam.Type: GrantFiled: December 15, 2020Date of Patent: December 19, 2023Assignee: II-VI Delaware, Inc.Inventors: Haro Fritsche, Andreas Grohe
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Publication number: 20220190561Abstract: A spectral beam combiner is based upon a specialized diffraction grating that is intentionally configured to create output signals along two separate paths, each path supporting a spectrally-combined beam. One path supports the propagation of a majority of the spectrally-combined beam (e.g., 80-95%) and is defined as the output path from the beam combiner. The remainder of the spectrally-combined beam is directed along a separate path and into an external cavity arrangement used to perform wavelength stabilization. Either reflective or transmissive diffraction gratings may be used, with different diffraction orders and/or polarization states of the spectrally-combined optical beam used to create the output beam and the separate wavelength stabilization feedback beam.Type: ApplicationFiled: December 15, 2020Publication date: June 16, 2022Applicant: II-VI Delaware, Inc.Inventors: Haro Fritsche, Andreas Grohe
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Patent number: 8828790Abstract: A method for local contacting and local doping of a semiconductor layer including the following process steps: A) Generation of a layer structure on the semiconductor layer through i) application of at least one intermediate layer on one side of the semiconductor layer, and ii) application of at least one metal layer onto the intermediate layer last applied in step i), wherein the metal layer at least partly covers the last applied intermediate layer, B) Local heating of the layer structure in such a manner that in a local region a short-time melt-mixture of at least partial regions of at least the layers: metal layer, intermediate layer and semiconductor layer, forms. After solidification of the melt-mixture, a contacting is created between metal layer and semiconductor layer. It is essential that in step A) i) at least one intermediate layer designed as dopant layer is applied, which contains a dopant wherein the dopant has a greater solubility in the semiconductor layer than the metal of the metal layer.Type: GrantFiled: August 20, 2009Date of Patent: September 9, 2014Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Ralf Preu, Andreas Grohe, Daniel Biro, Jochen Rentsch, Marc Hofmann, Jan-Frederik Nekarda, Andreas Wolf
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Patent number: 8586402Abstract: The invention relates to a method for the precision processing of substrates, in particular for the microstructuring of thin layers, local dopant introduction and also local application of a metal nucleation layer in which a liquid-assisted laser, i.e. laser irradiation of a substrate which is covered in the regions to be processed by a suitable reactive liquid, is implemented.Type: GrantFiled: March 6, 2008Date of Patent: November 19, 2013Assignees: Fraunhofer-Gesellschaft zur föderung der angewandten Forschung e.V., Albert-Ludwigs-Universität FreiburgInventors: Kuno Mayer, Monica Aleman, Daniel Kray, Stefan Glunz, Ansgar Mette, Ralf Preu, Andreas Grohe
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Patent number: 8236689Abstract: A method for applying a predetermined structure of a structural material to a semiconductor element. The method includes the following steps: A) partially covering a surface of the semiconductor element with a masking layer, B) applying a film of a structural material to the masking layer and to the surface of the semiconductor element in the zones that are devoid of the masking layer and C) removing the masking layer together with the structural material present on the masking layer. The method according to the invention provides that between process steps B and C, the film of structural material is partially removed in a process step B2.Type: GrantFiled: December 20, 2007Date of Patent: August 7, 2012Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Oliver Schultz-Wittmann, Filip Granek, Andreas Grohe
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Publication number: 20110233711Abstract: A method for local contacting and local doping of a semiconductor layer including the following process steps: A) Generation of a layer structure on the semiconductor layer through i) application of at least one intermediate layer on one side of the semiconductor layer, and ii) application of at least one metal layer onto the intermediate layer last applied in step i), wherein the metal layer at least partly covers the last applied intermediate layer, B) Local heating of the layer structure in such a manner that in a local region a short-time melt-mixture of at least partial regions of at least the layers: metal layer, intermediate layer and semiconductor layer, forms. After solidification of the melt-mixture, a contacting is created between metal layer and semiconductor layer. It is essential that in step A) i) at least one intermediate layer designed as dopant layer is applied, which contains a dopant wherein the dopant has a greater solubility in the semiconductor layer than the metal of the metal layer.Type: ApplicationFiled: August 20, 2009Publication date: September 29, 2011Applicant: Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V.Inventors: Ralf Preu, Andreas Grohe, Daniel Biro, Jochen Rentsch, Marc Hofmann, Jan-Frederik Nekarda, Andreas Wolf
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Patent number: 8003530Abstract: The present invention relates to a method for metallizing semiconductor components in which aluminium is used. In particular in the case of products in which the process costs play a big part, such as e.g. solar cells based on silicon, a cost advantage can be achieved with the invention. In addition, the present invention relates to the use of the method, for example in the production of solar cells.Type: GrantFiled: March 6, 2009Date of Patent: August 23, 2011Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Andreas Grohe, Jan-Frederik Nekarda, Oliver Schultz-Wittmann
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Publication number: 20100301456Abstract: A method for applying a predetermined structure of a structural material to a semiconductor element. The method includes the following steps: A) partially covering a surface of the semiconductor element with a masking layer, B) applying a film of a structural material to the masking layer and to the surface of the semiconductor element in the zones that are devoid of the masking layer and C) removing the masking layer together with the structural material present on the masking layer. The method according to the invention provides that between process steps B and C, the film of structural material is partially removed in a process step B2.Type: ApplicationFiled: December 20, 2007Publication date: December 2, 2010Applicant: Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V.Inventors: Oliver Schultz-Wittmann, Filip Granek, Andreas Grohe
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Publication number: 20100144079Abstract: The invention relates to a method for the precision processing of substrates, in particular for the microstructuring of thin layers, local dopant introduction and also local application of a metal nucleation layer in which a liquid-assisted laser, i.e. laser irradiation of a substrate which is covered in the regions to be processed by a suitable reactive liquid, is implemented.Type: ApplicationFiled: March 6, 2008Publication date: June 10, 2010Applicants: Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V., ALBERT-LUDWIGS-UNIVERSITÄT FREIBURGInventors: Kuno Mayer, Monica Aleman, Daniel Kray, Stefan Glunz, Ansgar Mette, Ralf Preu, Andreas Grohe
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Publication number: 20090221112Abstract: The present invention relates to a method for metallizing semiconductor components in which aluminium is used. In particular in the case of products in which the process costs play a big part, such as e.g. solar cells based on silicon, a cost advantage can be achieved with the invention. In addition, the present invention relates to the use of the method, for example in the production of solar cells.Type: ApplicationFiled: March 6, 2009Publication date: September 3, 2009Inventors: Andreas Grohe, Jan-Frederik Nekarda, Oliver Schultz-Wittmann