Patents by Inventor Andreas K. Schmid
Andreas K. Schmid 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: 8826726Abstract: A gas sensor is described which incorporates a sensor stack comprising a first film layer of a ferromagnetic material, a spacer layer, and a second film layer of the ferromagnetic material. The first film layer is fabricated so that it exhibits a dependence of its magnetic anisotropy direction on the presence of a gas, That is, the orientation of the easy axis of magnetization will flip from out-of-plane to in-plane when the gas to be detected is present in sufficient concentration. By monitoring the change in resistance of the sensor stack when the orientation of the first layer's magnetization changes, and correlating that change with temperature one can determine both the identity and relative concentration of the detected gas.Type: GrantFiled: April 29, 2010Date of Patent: September 9, 2014Assignee: The Regents of the University of CaliforniaInventors: Andreas K. Schmid, Arantzazu Mascaraque, Benito Santos, Juan de la Figuera
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Publication number: 20130126727Abstract: A time-of-flight (TOF) photoemission electron energy analyzer includes a TOF spectrometer for measuring an energy spectrum of a beam of electrons photoemitted from a sample and a 90 degree bend bandpass filter for spatially dispersing and filtering electrons according to energy. An exchange scattering electron spin polarimeter for detecting the spin of electrons includes an entrance aperture for admitting an electron beam, a magnetizable target positionable for receiving the electron beam at an angle relative to a target surface normal vector, a pair of Helmholtz coils positioned about the target for magnetizing the target in a selected direction, and a high-speed multi-channel plate (MCP) detector facing toward the target for receiving electrons reflected from the target surface, the MCP outputting a signal corresponding to the spin dependent intensity and time of electrons' arrivals.Type: ApplicationFiled: June 29, 2010Publication date: May 23, 2013Applicant: The Regents of the University of CaliforniaInventors: Christopher Jozwiak, Zahid Hussain, Alessandra Lanzara, Gennadi V. Lebedev, Andreas K. Schmid, Nord C. Andresen, Jeff Graf
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Patent number: 8398872Abstract: A novel method of forming large atomically flat areas is described in which a crystalline substrate having a stepped surface is exposed to a vapor of another material to deposit a material onto the substrate, which material under appropriate conditions self arranges to form 3D islands across the substrate surface. These islands are atomically flat at their top surface, and conform to the stepped surface of the substrate below at the island-substrate interface. Thereafter, the deposited materials are etched away, in the etch process the atomically flat surface areas of the islands transferred to the underlying substrate. Thereafter the substrate may be cleaned and annealed to remove any remaining unwanted contaminants, and eliminate any residual defects that may have remained in the substrate surface as a result of pre-existing imperfections of the substrate.Type: GrantFiled: March 10, 2009Date of Patent: March 19, 2013Assignee: The Regents of the University of CaliforniaInventors: Farid El Gabaly, Andreas K. Schmid
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Publication number: 20120131988Abstract: A gas sensor is described which incorporates a sensor stack comprising a first film layer of a ferromagnetic material, a spacer layer, and a second film layer of the ferromagnetic material. The first film layer is fabricated so that it exhibits a dependence of its magnetic anisotropy direction on the presence of a gas, That is, the orientation of the easy axis of magnetization will flip from out-of-plane to in-plane when the gas to be detected is present in sufficient concentration. By monitoring the change in resistance of the sensor stack when the orientation of the first layer's magnetization changes, and correlating that change with temperature one can determine both the identity and relative concentration of the detected gas.Type: ApplicationFiled: April 29, 2010Publication date: May 31, 2012Applicant: The Regents of the University of CaliforniaInventors: Andreas K. Schmid, Arantzazu Mascaraque, Benito Santos, Juan de la Figuera
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Patent number: 8142754Abstract: A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 10?6 Torr, the wafer temperature is raised to about 1500° C., whereby silicon evaporates from the wafer leaving a carbon rich surface, the evaporated silicon trapped in the gap between the wafers, such that the higher vapor pressure of silicon above each of the wafers suppresses further silicon evaporation. As the temperature of the wafers is raised to about 1530° C. or more, the carbon atoms self assemble themselves into graphene.Type: GrantFiled: March 8, 2011Date of Patent: March 27, 2012Assignee: The Regents of the University of CaliforniaInventors: Alessandra Lanzara, Andreas K. Schmid, Xiaozhu Yu, Choonkyu Hwang, Annemarie Kohl, Chris M. Jozwiak
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Publication number: 20110223094Abstract: A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 10?6 Torr, the wafer temperature is raised to about 1500° C., whereby silicon evaporates from the wafer leaving a carbon rich surface, the evaporated silicon trapped in the gap between the wafers, such that the higher vapor pressure of silicon above each of the wafers suppresses further silicon evaporation. As the temperature of the wafers is raised to about 1530° C. or more, the carbon atoms self assemble themselves into graphene.Type: ApplicationFiled: March 8, 2011Publication date: September 15, 2011Applicant: The Regents of the University of CaliforniaInventors: Alessandra Lanzara, Andreas K. Schmid, Xiaozhu Yu, Choonkyu Hwang, Annemarie Kohl, Chris M. Jozwiak
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Publication number: 20110042351Abstract: A novel method of forming large atomically flat areas is described in which a crystalline substrate having a stepped surface is exposed to a vapor of another material to deposit a material onto the substrate, which material under appropriate conditions self arranges to form 3D islands across the substrate surface. These islands are atomically flat at their top surface, and conform to the stepped surface of the substrate below at the island-substrate interface. Thereafter, the deposited materials are etched away, in the etch process the atomically flat surface areas of the islands transferred to the underlying substrate. Thereafter the substrate may be cleaned and annealed to remove any remaining unwanted contaminants, and eliminate any residual defects that may have remained in the substrate surface as a result of pre-existing imperfections of the substrate.Type: ApplicationFiled: March 10, 2009Publication date: February 24, 2011Applicant: ENERGY, UNITED STATES DEPARTMENT OFInventors: Farid El Gabaly, Andreas K. Schmid