Patents by Inventor Murat Okandan
Murat Okandan 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: 9761748Abstract: A photovoltaic (PV) module includes an absorber layer coupled to an optic layer. The absorber layer includes an array of PV elements. The optic layer includes a close-packed array of Keplerian telescope elements, each corresponding to one of an array of pupil elements. The Keplerian telescope substantially couple radiation that is incident on their objective surfaces into the corresponding pupil elements. Each pupil element relays radiation that is coupled into it from the corresponding Keplerian telescope element into the corresponding PV element.Type: GrantFiled: April 14, 2015Date of Patent: September 12, 2017Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Gregory N. Nielson, William C. Sweatt, Murat Okandan
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Patent number: 9763370Abstract: An apparatus including a carrier substrate configured to move a microelectronic device. The apparatus further includes a rotatable body configured to receive the microelectronic device. Additionally, the apparatus includes a second substrate configured to receive the microelectronic device from the rotatable body.Type: GrantFiled: November 25, 2013Date of Patent: September 12, 2017Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Murat Okandan, Gregory N. Nielson, Jose Luis Cruz-Campa, Judith Maria Lavin, Paul J. Resnick
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Patent number: 9748415Abstract: A method including providing a substrate comprising a device layer on which a plurality of device cells are defined; depositing a first dielectric layer on the device layer and metal interconnect such that the deposited interconnect is electrically connected to at least two of the device cells; depositing a second dielectric layer over the interconnect; and exposing at least one contact point on the interconnect through the second dielectric layer. An apparatus including a substrate having defined thereon a device layer including a plurality of device cells; a first dielectric layer disposed directly on the device layer; a plurality of metal interconnects, each of which is electrically connected to at least two of the device cells; and a second dielectric layer disposed over the first dielectric layer and over the interconnects, wherein the second dielectric layer is patterned in a positive or negative planar spring pattern.Type: GrantFiled: November 23, 2016Date of Patent: August 29, 2017Assignee: Sandia CorporationInventors: Murat Okandan, Gregory N. Nielson, Jose Luis Cruz-Campa, Carlos Anthony Sanchez
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Publication number: 20170200762Abstract: Curved, flexible arrays of radiation detectors are formed by using standard silicon semiconductor processing materials and techniques and additional functionalization through integration of conversion and shielding materials. The resulting flexible arrays can be handled, integrated, further functionalized and deployed for a wide variety of applications where conventional sensors do not provide the desired functionality, form factors and/or reliability. The arrays can be stacked and include multiple types and thicknesses of conversion layers, enabling the detector to simultaneously detect multiple radiation types, and perform complex, simultaneous functions such as energy discrimination, spectroscopy, directionality detection, and particle trajectory tracking of incident radiation.Type: ApplicationFiled: January 12, 2017Publication date: July 13, 2017Inventors: Murat Okandan, Markku Juhani Koskelo
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Publication number: 20170162724Abstract: A method including providing a substrate comprising a device layer on which a plurality of device cells are defined; depositing a first dielectric layer on the device layer and metal interconnect such that the deposited interconnect is electrically connected to at least two of the device cells; depositing a second dielectric layer over the interconnect; and exposing at least one contact point on the interconnect through the second dielectric layer. An apparatus including a substrate having defined thereon a device layer including a plurality of device cells; a first dielectric layer disposed directly on the device layer; a plurality of metal interconnects, each of which is electrically connected to at least two of the device cells; and a second dielectric layer disposed over the first dielectric layer and over the interconnects, wherein the second dielectric layer is patterned in a positive or negative planar spring pattern.Type: ApplicationFiled: November 23, 2016Publication date: June 8, 2017Inventors: Murat Okandan, Gregory N. Nielson, Jose Luis Cruz-Campa, Carlos Anthony Sanchez
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Patent number: 9660026Abstract: There is provided an electronic device and a method for its manufacture. The device comprises an elongate silicon nanowire less than 0.5 ?m in cross-sectional dimensions and having a hexagonal cross-sectional shape due to annealing-induced energy relaxation. The method, in examples, includes thinning the nanowire through iterative oxidation and etching of the oxidized portion.Type: GrantFiled: November 17, 2016Date of Patent: May 23, 2017Assignee: Sandia CorporationInventors: Murat Okandan, Bruce L. Draper, Paul J. Resnick
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Patent number: 9595628Abstract: A radiation detector comprises a silicon body in which are defined vertical pores filled with a converter material and situated within silicon depletion regions. One or more charge-collection electrodes are arranged to collect current generated when secondary particles enter the silicon body through walls of the pores. The pores are disposed in low-density clusters, have a majority pore thickness of 5 ?m or less, and have a majority aspect ratio, defined as the ratio of pore depth to pore thickness, of at least 10.Type: GrantFiled: August 11, 2014Date of Patent: March 14, 2017Assignee: Sandia CorporationInventors: Murat Okandan, Mark S. Derzon, Bruce L. Draper
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Patent number: 9559219Abstract: A method including providing a substrate comprising a device layer on which a plurality of device cells are defined; depositing a first dielectric layer on the device layer and metal interconnect such that the deposited interconnect is electrically connected to at least two of the device cells; depositing a second dielectric layer over the interconnect; and exposing at least one contact point on the interconnect through the second dielectric layer. An apparatus including a substrate having defined thereon a device layer including a plurality of device cells; a first dielectric layer disposed directly on the device layer; a plurality of metal interconnects, each of which is electrically connected to at least two of the device cells; and a second dielectric layer disposed over the first dielectric layer and over the interconnects, wherein the second dielectric layer is patterned in a positive or negative planar spring pattern.Type: GrantFiled: June 19, 2015Date of Patent: January 31, 2017Assignee: Sandia CorporationInventors: Murat Okandan, Gregory N. Nielson, Jose Luis Cruz-Campa, Carlos Anthony Sanchez
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Patent number: 9548411Abstract: Various technologies described herein pertain to assembling electronic devices into a microsystem. The electronic devices are disposed in a solution. Light can be applied to the electronic devices in the solution. The electronic devices can generate currents responsive to the light applied to the electronic devices in the solution, and the currents can cause electrochemical reactions that functionalize regions on surfaces of the electronic devices. Additionally or alternatively, the light applied to the electronic devices in the solution can cause the electronic devices to generate electric fields, which can orient the electronic devices and/or induce movement of the electronic devices with respect to a receiving substrate. Further, electrodes on a receiving substrate can be biased to attract and form connections with the electronic devices having the functionalized regions on the surfaces. The microsystem can include the receiving substrate and the electronic devices connected to the receiving substrate.Type: GrantFiled: October 23, 2013Date of Patent: January 17, 2017Assignee: Sandia CorporationInventors: Gregory N. Nielson, Murat Okandan
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Patent number: 9536947Abstract: There is provided an electronic device and a method for its manufacture. The device comprises an elongate silicon nanowire less than 0.5 ?m in cross-sectional dimensions and having a hexagonal cross-sectional shape due to annealing-induced energy relaxation.Type: GrantFiled: August 14, 2013Date of Patent: January 3, 2017Assignee: Sandia CorporationInventors: Murat Okandan, Bruce L. Draper, Paul J. Resnick
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Patent number: 9531322Abstract: A PV system composed of sub-arrays, each having a group of PV cells that are electrically connected to each other. A power management circuit for each sub-array has a communications interface and serves to connect or disconnect the sub-array to a programmable power grid. The power grid has bus rows and bus columns. A bus management circuit is positioned at a respective junction of a bus column and a bus row and is programmable through its communication interface to connect or disconnect a power path in the grid. As a result, selected sub-arrays are connected by selected power paths to be in parallel so as to produce a low system voltage, and, alternately in series so as to produce a high system voltage that is greater than the low voltage by at least a factor of ten.Type: GrantFiled: April 19, 2016Date of Patent: December 27, 2016Assignee: Sandia CorporationInventors: Murat Okandan, Gregory N. Nielson
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Publication number: 20160359637Abstract: Fabrication, integration and operation of an array of micro-scale singulated electronic and opto-electronic semiconductor devices in flexible, thin and highly reliable format. The array includes power and data management devices that are distributed within the array such that each one handles only a small amount of power compared to existing systems. Thus less expensive, more reliable components can be used. These devices and systems enable novel functionality and enhanced capabilities in renewable energy, communication, sensing and control systems, such as photovoltaic arrays and phased array antennas.Type: ApplicationFiled: June 7, 2016Publication date: December 8, 2016Inventor: Murat Okandan
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Patent number: 9508881Abstract: A microsystems-enabled multi-junction photovoltaic (MEM-PV) cell includes a first photovoltaic cell having a first junction, the first photovoltaic cell including a first semiconductor material employed to form the first junction, the first semiconductor material having a first bandgap. The MEM-PV cell also includes a second photovoltaic cell comprising a second junction. The second photovoltaic cell comprises a second semiconductor material employed to form the second junction, the second semiconductor material having a second bandgap that is less than the first bandgap, the second photovoltaic cell further comprising a first contact layer disposed between the first junction of the first photovoltaic cell and the second junction of the second photovoltaic cell, the first contact layer composed of a third semiconductor material having a third bandgap, the third bandgap being greater than or equal to the first bandgap.Type: GrantFiled: October 11, 2012Date of Patent: November 29, 2016Assignee: Sandia CorporationInventors: Anna Tauke-Pedretti, Jeffrey Cederberg, Gregory N. Nielson, Murat Okandan, Jose Luis Cruz-Campa
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Patent number: 9501738Abstract: A cellular computational platform is disclosed that includes a multiplicity of functionally identical, repeating computational hardware units that are interconnected electrically and optically. Each computational hardware unit includes a reprogrammable local memory and has interconnections to other such units that have reconfigurable weights. Each computational hardware unit is configured to transmit signals into the network for broadcast in a protocol-less manner to other such units in the network, and to respond to protocol-less broadcast messages that it receives from the network. Each computational hardware unit is further configured to reprogram the local memory in response to incoming electrical and/or optical signals.Type: GrantFiled: August 13, 2013Date of Patent: November 22, 2016Assignee: Sandia CorporationInventor: Murat Okandan
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Patent number: 9496448Abstract: Photovoltaic cells and photovoltaic modules, as well as methods of making and using such photovoltaic cells and photovoltaic modules, are disclosed. More particularly, embodiments of the photovoltaic cells selectively reflect visible light to provide the photovoltaic cells with a colorized appearance. Photovoltaic modules combining colorized photovoltaic cells may be used to harvest solar energy while providing a customized appearance, e.g., an image or pattern.Type: GrantFiled: October 30, 2013Date of Patent: November 15, 2016Assignee: Sandia CorporationInventors: Jose Luis Cruz-Campa, Gregory N. Nielson, Murat Okandan, Anthony L. Lentine, Paul J. Resnick, Vipin P. Gupta
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Publication number: 20160233827Abstract: A PV system composed of sub-arrays, each having a group of PV cells that are electrically connected to each other. A power management circuit for each sub-array has a communications interface and serves to connect or disconnect the sub-array to a programmable power grid. The power grid has bus rows and bus columns. A bus management circuit is positioned at a respective junction of a bus column and a bus row and is programmable through its communication interface to connect or disconnect a power path in the grid. As a result, selected sub-arrays are connected by selected power paths to be in parallel so as to produce a low system voltage, and, alternately in series so as to produce a high system voltage that is greater than the low voltage by at least a factor of ten.Type: ApplicationFiled: April 19, 2016Publication date: August 11, 2016Inventors: Murat Okandan, Gregory N. Nielson
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Patent number: 9410931Abstract: A low-power miniaturized photoacoustic sensor uses an optical microphone made by semiconductor fabrication techniques, and optionally allows for all-optical communication to and from the sensor. This allows integration of the photoacoustic sensor into systems with special requirements, such as those that would be reactive in an electrical discharge condition. The photoacoustic sensor can also be operated in various other modes with wide application flexibility.Type: GrantFiled: October 17, 2013Date of Patent: August 9, 2016Assignee: Sandia CorporationInventors: Murat Okandan, Alex Robinson, Gregory N. Nielson, Paul J. Resnick
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Patent number: 9391557Abstract: Solar tracking systems, as well as methods of using such solar tracking systems, are disclosed. More particularly, embodiments of the solar tracking systems include lateral supports horizontally positioned between uprights to support photovoltaic modules. The lateral supports may be raised and lowered along the uprights or translated to cause the photovoltaic modules to track the moving sun.Type: GrantFiled: October 25, 2013Date of Patent: July 12, 2016Assignee: Sandia CorporationInventors: Murat Okandan, Gregory N. Nielson
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Patent number: 9356173Abstract: A PV system composed of sub-arrays, each having a group of PV cells that are electrically connected to each other. A power management circuit for each sub-array has a communications interface and serves to connect or disconnect the sub-array to a programmable power grid. The power grid has bus rows and bus columns. A bus management circuit is positioned at a respective junction of a bus column and a bus row and is programmable through its communication interface to connect or disconnect a power path in the grid. As a result, selected sub-arrays are connected by selected power paths to be in parallel so as to produce a low system voltage, and, alternately in series so as to produce a high system voltage that is greater than the low voltage by at least a factor of ten.Type: GrantFiled: August 29, 2013Date of Patent: May 31, 2016Assignee: Sandia CorporationInventors: Murat Okandan, Gregory N. Nielson
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Patent number: 9287430Abstract: A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.Type: GrantFiled: November 1, 2007Date of Patent: March 15, 2016Assignee: Sandia CorporationInventors: Gregory N. Nielson, Vipin P. Gupta, Murat Okandan, Michael R. Watts