Patents by Inventor André Strittmatter
André Strittmatter 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: 11870220Abstract: A semiconductor layer stack, a component made therefrom, a component module, and a production method is provided. The semiconductor layer stack has at least two layers (A, B), which, as individual layers, each have an energy position of the Fermi level in the semiconductor band gap, E F - E V < E G 2 applying to the layer (A) and E L - E F < E G 2 applying to the layer (B), with EF the energy position of the Fermi level, EV the energy position of the valence band, EL the energy position of a conduction band and EL?EV the energy difference of the semiconductor band gap EG, the thickness of the layers (A, B) being selected in such a way that a continuous space charge zone region over the layers (A, B) results.Type: GrantFiled: July 19, 2022Date of Patent: January 9, 2024Assignees: Otto-von-Guericke-Universitaet Magdeburg, AZUR SPACE Solar Power GmbHInventors: Armin Dadgar, André Strittmatter
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Publication number: 20220368110Abstract: A semiconductor layer stack, a component made therefrom, a component module, and a production method is provided. The semiconductor layer stack has at least two layers (A, B), which, as individual layers, each have an energy position of the Fermi level in the semiconductor band gap, E F - E V < E G 2 applying to the layer (A) and E L - E F < E G 2 applying to the layer (B), with EF the energy position of the Fermi level, EV the energy position of the valence band, EL the energy position of a conduction band and EL?EV the energy difference of the semiconductor band gap EG, the thickness of the layers (A, B) being selected in such a way that a continuous space charge zone region over the layers (A, B) results.Type: ApplicationFiled: July 19, 2022Publication date: November 17, 2022Applicants: OTTO-VON-GUERICKE-UNIVERSITAET MAGDEBURG, AZUR SPACE SOLAR POWER GMBHInventors: Armin DADGAR, André STRITTMATTER
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Patent number: 11424596Abstract: A semiconductor layer stack, a component made therefrom, a component module, and a production method is provided. The semiconductor layer stack has at least two layers (A, B), which, as individual layers, each have an energy position of the Fermi level in the semiconductor band gap, E F - E V < E G 2 applying to the layer (A) and E L - E F < E G 2 applying to the layer (B), with EF the energy position of the Fermi level, EV the energy position of the valence band, EL the energy position of a conduction band and EL?EV the energy difference of the semiconductor band gap EG, the thickness of the layers (A, B) being selected in such a way that a continuous space charge zone region over the layers (A, B) results.Type: GrantFiled: December 28, 2020Date of Patent: August 23, 2022Assignees: Otto-von-Guericke-Universitaet Magdeburg, AZUR SPACE Solar Power GmbHInventors: Armin Dadgar, André Strittmatter
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Publication number: 20210119419Abstract: A semiconductor layer stack, a component made therefrom, a component module, and a production method is provided. The semiconductor layer stack has at least two layers (A, B), which, as individual layers, each have an energy position of the Fermi level in the semiconductor band gap, E F - E V < E G 2 applying to the layer (A) and E L - E F < E G 2 applying to the layer (B), with EF the energy position of the Fermi level, EV the energy position of the valence band, EL the energy position of a conduction band and EL?EV the energy difference of the semiconductor band gap EG, the thickness of the layers (A, B) being selected in such a way that a continuous space charge zone region over the layers (A, B) results.Type: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Applicants: OTTO-VON-GUERICKE-UNIVERSITAET MAGDEBURG, AZUR SPACE SOLAR POWER GMBHInventors: Armin DADGAR, André STRITTMATTER
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Patent number: 10673207Abstract: The invention relates to, inter alia, a light-emitting semiconductor component comprising the following: —a first mirror (102, 202, 302, 402, 502), —a first conductive layer (103, 203, 303, 403, 503), —a light-emitting layer sequence (104, 204, 304, 404, 504) on a first conductive layer face facing away from the first mirror, and—a second conductive layer (105, 205, 305, 405, 505) on a light-emitting layer sequence face facing away from the first conductive layer, wherein—the first mirror, the first conductive layer, the light-emitting layer sequence, and the second conductive layer are based on a III-nitride compound semiconductor material, —the first mirror is electrically conductive, and—the first mirror is a periodic sequence of homoepitaxial materials with varying refractive indices.Type: GrantFiled: June 2, 2016Date of Patent: June 2, 2020Assignee: OSRAM OPTO SEMICONDUCTORS GMBHInventors: Armin Dadgar, André Strittmatter, Christoph Berger
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Publication number: 20180166854Abstract: The invention relates to, inter alia, a light-emitting semiconductor component comprising the following: —a first mirror (102, 202, 302, 402, 502), —a first conductive layer (103, 203, 303, 403, 503), —a light-emitting layer sequence (104, 204, 304, 404, 504) on a first conductive layer face facing away from the first mirror, and —a second conductive layer (105, 205, 305, 405, 505) on a light-emitting layer sequence face facing away from the first conductive layer, wherein —the first mirror, the first conductive layer, the light-emitting layer sequence, and the second conductive layer are based on a III-nitride compound semiconductor material, —the first mirror is electrically conductive, and —the first mirror is a periodic sequence of homoepitaxial materials with varying refractive indices.Type: ApplicationFiled: June 2, 2016Publication date: June 14, 2018Inventors: Armin DADGAR, André STRITTMATTER, Christoph BERGER
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Publication number: 20180130927Abstract: The invention relates to a component having a transparent conductive nitride layer, characterized by a layer in the AlGaInN system and a doping with a flat donor above a concentration of 5×1019 cm?3.Type: ApplicationFiled: June 4, 2016Publication date: May 10, 2018Inventors: Armin DADGAR, Axel HOFFMANN, Christian NENSTIEL, André STRITTMATTER
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Patent number: 9490608Abstract: The invention relates, inter alia, to a method for producing an electro-optical component (10, 200) suitable for emitting electromagnetic radiation (120), wherein in the method a first intermediate layer (60) is applied on a carrier, a second intermediate layer (70) is applied on the first intermediate layer, and after the second intermediate layer has been applied, the buried first intermediate layer is locally modified, wherein as a result of the local modification of the buried first intermediate layer in a lateral direction a refractive index jump is produced which brings about a lateral wave guiding of the electromagnetic radiation (120) in the unmodified region of the first intermediate layer.Type: GrantFiled: November 20, 2015Date of Patent: November 8, 2016Assignee: TECHNISCHE UNVERSITÄT BERLINInventors: André Strittmatter, Jan-Hindrik Schulze, Tim David Germann
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Publication number: 20160079737Abstract: The invention relates, inter alia, to a method for producing an electro-optical component (10, 200) suitable for emitting electromagnetic radiation (120), wherein in the method a first intermediate layer (60) is applied on a carrier, a second intermediate layer (70) is applied on the first intermediate layer, and after the second intermediate layer has been applied, the buried first intermediate layer is locally modified, wherein as a result of the local modification of the buried first intermediate layer in a lateral direction a refractive index jump is produced which brings about a lateral wave guiding of the electromagnetic radiation (120) in the unmodified region of the first intermediate layer.Type: ApplicationFiled: November 20, 2015Publication date: March 17, 2016Applicant: TECHNISCHE UNVERSITÄT BERLINInventors: André STRITTMATTER, Jan-Hindrik SCHULZE, Tim David GERMANN
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Patent number: 9225145Abstract: The invention relates, inter alia, to a method for producing an electro-optical component (10, 200) suitable for emitting electromagnetic radiation (120), wherein in the method a first intermediate layer (60) is applied on a carrier, a second intermediate layer (70) is applied on the first intermediate layer, and after the second intermediate layer has been applied, the buried first intermediate layer is locally modified, wherein as a result of the local modification of the buried first intermediate layer in a lateral direction a refractive index jump is produced which brings about a lateral wave guiding of the electromagnetic radiation (120) in the unmodified region of the first intermediate layer.Type: GrantFiled: June 21, 2012Date of Patent: December 29, 2015Assignee: Technische Universität BerlinInventors: André Strittmatter, Jan-Hindrik Schulze, Tim David Germann
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Patent number: 9166375Abstract: A semiconductor light emitting device includes a pump light source, a gain structure, and an out-coupling mirror. The gain structure is comprised of InGaN layers that have resonant excitation absorption at the pump wavelength. Light from the pump light source causes the gain structure to emit light, which is reflected by the out-coupling mirror back to the gain structure. A distributed Bragg reflector causes internal reflection within the gain structure. The out-coupling mirror permits light having sufficient energy to pass therethrough for use external to the device. A frequency doubling structure may be disposed between the gain structure and the out-coupling mirror. Output wavelengths in the deep-UV spectrum may be achieved.Type: GrantFiled: August 15, 2012Date of Patent: October 20, 2015Assignee: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Andre Strittmatter, Christopher L. Chua, Peter Kiesel, Noble M. Johnson, Joerg Martini
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Publication number: 20140126597Abstract: The invention relates, inter alia, to a method for producing an electro-optical component (10, 200) suitable for emitting electromagnetic radiation (120), wherein in the method a first intermediate layer (60) is applied on a carrier, a second intermediate layer (70) is applied on the first intermediate layer, and after the second intermediate layer has been applied, the buried first intermediate layer is locally modified, wherein as a result of the local modification of the buried first intermediate layer in a lateral direction a refractive index jump is produced which brings about a lateral wave guiding of the electromagnetic radiation (120) in the unmodified region of the first intermediate layer.Type: ApplicationFiled: June 21, 2012Publication date: May 8, 2014Inventors: André Strittmatter, Jan-Hindrik Schulze, Tim David Germann
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Patent number: 8652918Abstract: A structure method for producing same provides suppressed lattice defects when epitaxially forming nitride layers over non-c-plane oriented layers, such as a semi-polar oriented template layer or substrate. A patterned mask with “window” openings, or trenches formed in the substrate with appropriate vertical dimensions, such as the product of the window width times the cotangent of the angle between the surface normal and the c-axis direction, provides significant blocking of all diagonally running defects during growth. In addition, inclined posts of appropriate height and spacing provide a blocking barrier to vertically running defects is created. When used in conjunction with the aforementioned aspects of mask windows or trenches, the post structure provides significant blocking of both vertically and diagonally running defects during growth.Type: GrantFiled: May 17, 2012Date of Patent: February 18, 2014Assignee: Palo Alto Research Center IncorporatedInventor: Andre Strittmatter
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Patent number: 8502197Abstract: A device including a locally modified buried first layer. A second layer is arranged on top of the first layer. The first layer includes at least one modified section and at least one unmodified section. The modified material of the locally modified buried first layer changes or induces mechanical strain in a portion of the second layer which is arranged above the at least one modified section. At least one nanostructure is placed on top of the second layer in an area, which is located above the at least one unmodified section of the first layer or adjacent thereto, said at least one nanostructure being formed by a strain-sensitive third material deposited on the locally strained second layer.Type: GrantFiled: December 11, 2012Date of Patent: August 6, 2013Assignee: Technische Universitat BerlinInventors: André Strittmatter, Andrei Schliwa, Tim David Germann, Udo W. Pohl, Vladimir Gaysler, Jan-Hindrik Schulze
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Publication number: 20130016746Abstract: A semiconductor light emitting device includes a pump light source, a gain structure, and an out-coupling mirror. The gain structure is comprised of InGaN layers that have resonant excitation absorption at the pump wavelength. Light from the pump light source causes the gain structure to emit light, which is reflected by the out-coupling mirror back to the gain structure. A distributed Bragg reflector causes internal reflection within the gain structure. The out-coupling mirror permits light having sufficient energy to pass therethrough for use external to the device. A frequency doubling structure may be disposed between the gain structure and the out-coupling mirror. Output wavelengths in the deep-UV spectrum may be achieved.Type: ApplicationFiled: August 15, 2012Publication date: January 17, 2013Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Andre Strittmatter, Christopher L. Chua, Peter Kiesel, Noble M. Johnson, Joerg Martini
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Patent number: 8349712Abstract: The invention inter alia relates to a method of fabricating a layer assembly comprising the steps of: arranging a first layer on top of a carrier; arranging a second layer on top of the first layer; locally modifying the material of the buried first layer and providing at least one modified section in the first layer, wherein the modified material changes or induces mechanical strain in a portion of the second layer which is arranged above the at least one modified section; after locally modifying the material of the buried first layer, depositing a third material on top of the second layer, at least one characteristic of the third material being sensitive to the local mechanical strain in the second layer.Type: GrantFiled: March 30, 2011Date of Patent: January 8, 2013Assignee: Technische Universitat BerlinInventors: André Strittmatter, Andrei Schliwa, Tim David Germann, Udo W. Pohl, Vladimir Gaysler, Jan-Hindrik Schulze
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Patent number: 8330144Abstract: A structure and method for producing same provides a solid-state light emitting device with suppressed lattice defects in epitaxially formed nitride layers over a non-c-plane oriented (e.g., semi-polar) template or substrate. A dielectric layer with “window” openings or trenches provides significant suppression of all diagonally running defects during growth. Posts of appropriate height and spacing may further provide suppression of vertically running defects. A layer including gallium nitride is formed over the dielectric layer, and polished to provide a planar growth surface with desired roughness. A tri-layer indium gallium nitride active region is employed. For laser diode embodiments, a relatively thick aluminum gallium nitride cladding layer is provided over the gallium nitride layer.Type: GrantFiled: July 16, 2012Date of Patent: December 11, 2012Assignee: Palo Alto Research Center IncorporatedInventors: Andre Strittmatter, Noble M. Johnson, Mark Teepe, Christopher L. Chua, Zhihong Yang, John E. Northrup
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Publication number: 20120280212Abstract: A structure and method for producing same provides a solid-state light emitting device with suppressed lattice defects in epitaxially formed nitride layers over a non-c-plane oriented (e.g., semi-polar) template or substrate. A dielectric layer with “window” openings or trenches provides significant suppression of all diagonally running defects during growth. Posts of appropriate height and spacing may further provide suppression of vertically running defects. A layer including gallium nitride is formed over the dielectric layer, and polished to provide a planar growth surface with desired roughness. A tri-layer indium gallium nitride active region is employed. For laser diode embodiments, a relatively thick aluminum gallium nitride cladding layer is provided over the gallium nitride layer.Type: ApplicationFiled: July 16, 2012Publication date: November 8, 2012Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Andre Strittmatter, Noble M. Johnson, Mark Teepe, Christopher L. Chua, Zhihong Yang, John E. Northrup
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Publication number: 20120248403Abstract: The invention inter alia relates to a method of fabricating a layer assembly comprising the steps of: arranging a first layer on top of a carrier; arranging a second layer on top of the first layer; locally modifying the material of the buried first layer and providing at least one modified section in the first layer, wherein the modified material changes or induces mechanical strain in a portion of the second layer which is arranged above the at least one modified section; after locally modifying the material of the buried first layer, depositing a third material on top of the second layer, at least one characteristic of the third material being sensitive to the local mechanical strain in the second layer.Type: ApplicationFiled: March 30, 2011Publication date: October 4, 2012Inventors: André STRITTMATTER, Andrei Schliwa, Tim David Germann, Udo W. Pohl, Vladimir Gaysler, Jan-Hindrik Schulze
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Publication number: 20120225541Abstract: A structure method for producing same provides suppressed lattice defects when epitaxially forming nitride layers over non-c-plane oriented layers, such as a semi-polar oriented template layer or substrate. A patterned mask with “window” openings, or trenches formed in the substrate with appropriate vertical dimensions, such as the product of the window width times the cotangent of the angle between the surface normal and the c-axis direction, provides significant blocking of all diagonally running defects during growth. In addition, inclined posts of appropriate height and spacing provide a blocking barrier to vertically running defects is created. When used in conjunction with the aforementioned aspects of mask windows or trenches, the post structure provides significant blocking of both vertically and diagonally running defects during growth.Type: ApplicationFiled: May 17, 2012Publication date: September 6, 2012Applicant: PALO ALTO RESEARCH CENTER INCORPORATEDInventor: André Strittmatter