Patents by Inventor Sami Oukassi
Sami Oukassi 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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Publication number: 20150118544Abstract: An encapsulation device comprises at least one assembly containing particles comprising at least a first material. The assembly has an open porosity. The particles: are distributed over a geometric structure that has a degree of compactness of said particles of greater than around 50% and preferably of greater than 60%, and are covered conformally by at least one layer referred to as an infiltration layer; the thickness of at least the infiltration layer closing off the porosity of the assembly comprising the particles covered by at least the layer, in the form of pores that are not connected to one another. A process for producing the encapsulation device is also provided.Type: ApplicationFiled: October 28, 2014Publication date: April 30, 2015Inventor: Sami OUKASSI
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Publication number: 20150027979Abstract: The method for fabricating a lithium microbattery is performed from a stack of layers successively including: a first layer made from a first material, a second layer made from a second material, a solid electrolyte layer and a first electrode. The method further includes etching to form a first pattern made from the first material and a second pattern made from the second material, the second pattern defining a covered area and an uncovered area of the electrolyte layer. The uncovered area is then etched using the second pattern as etching mask. After etching of the first pattern, a lithium-based layer is formed on the second pattern, the lithium-based layer and the second pattern forming a second lithium-based electrode.Type: ApplicationFiled: July 29, 2014Publication date: January 29, 2015Inventors: Sami OUKASSI, Arnaud BAZIN
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Publication number: 20140248541Abstract: At least one zone made of lithium-containing glass-ceramic material, in a solid electrolyte for a lithium battery, is formed from a lithium-containing ceramic material, advantageously in the form of a layer such as a thin film It is obtained by melting of at least a part of the lithium-containing ceramic material, followed by a recrystallization heat treatment. Melting is obtained by a laser beam irradiation operation, which enables fabrication of the solid electrolyte to be performed directly on a multilayer stack comprising certain active components of the lithium battery.Type: ApplicationFiled: June 15, 2012Publication date: September 4, 2014Applicant: Commissariat A L'Energie Atomique Et Aux Energies AlternativesInventors: Sami Oukassi, Samir Guerroudj, Michaël Roffat
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Publication number: 20140227580Abstract: An electrical energy storage and/or generation device with an architecture including a stack of electrical storage and/or generation elements, such as microbatteries. An electrical connection is not made between the different stacked elements during manufacture, but subsequently with assistance of an electronic control unit to configure, in series and/or in parallel, all or a proportion of the elements, and to configure electrical outputs of the device, such as the electrical voltage or the storage capacity.Type: ApplicationFiled: May 11, 2012Publication date: August 14, 2014Applicant: Commissariat a l'energie atomique et aux ene altInventors: Sami Oukassi, Raphael Salot
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Patent number: 8778532Abstract: This lithium electrochemical device includes a stack of layers suitable for constituting a micro-battery deposited on a substrate and encapsulated using a protective cap sealed onto the substrate. It includes two collectors of the current generated by the micro-battery and at least one insulating layer inert as regards lithium. The collectors and the insulating layer or layers are deposited on the substrate. The protective cap is sealed onto the substrate using the layers constituting the current collectors and the insulating layer or layers. The cap has layers of the same nature, positioned in the same order in line with their respective layers deposited on the substrate, so that when the cap is sealed onto the substrate, the respective layers deposited on the cap and on the substrate come into contact with each other to provide the actual seal of the cap on the substrate.Type: GrantFiled: November 12, 2008Date of Patent: July 15, 2014Assignees: Commissariat à l'Energie Atomique, ST Microelectronics SAInventors: Raphaël Salot, Steve Martin, Sami Oukassi
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Publication number: 20140154401Abstract: The method of producing a device having batteries includes the following successive steps performed on a support substrate: providing a support substrate including a first electrically conducting layer forming a main surface, simultaneously forming a plurality of batteries on the first electrically conducting layer, testing operation of the plurality of batteries to discriminate between a first group of functional batteries and a second group of defective batteries, forming a second electrically conducting layer electrically insulated from the first electrically conducting layer, the second electrically conducting layer and the first electrically conducting layer being configured to connect only the functional batteries in parallel.Type: ApplicationFiled: June 28, 2012Publication date: June 5, 2014Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE AUX ENERGIES ALTERNATIVESInventors: Raphael Salot, Philipp Achatz, Steve Martin, Sami Oukassi
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Patent number: 8722234Abstract: The invention relates to a microbattery that comprises a stack on a substrate, covered by an encapsulation layer and comprising first and second current collector/electrode assemblies, a solid electrolyte and electrical connections of the second current collector/electrode assembly to an external electrical load. The electrical connections are formed by at least two electrically conductive barriers passing through the encapsulation layer from an inner surface to an outer surface of the encapsulation layer. Each of the barriers has a lower wall in direct contact with a front surface of the second current collector/electrode assembly and an upper wall opening onto the outer surface of the encapsulation layer. The barriers form a compartmentalization network within the encapsulation layer.Type: GrantFiled: February 23, 2011Date of Patent: May 13, 2014Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Sami Oukassi, Philippe Coronel
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Patent number: 8507031Abstract: The microcomponent, for example a microbattery, comprising a stack with at least two superposed layers on a substrate, is made using a single steel mask able to expand under the effect of temperature. The mask comprises at least one off-centered opening. The mask being at a first temperature, a first layer is deposited through the opening of the mask. The mask being at a second temperature, higher than the first temperature, a second layer is deposited through the opening of the mask. Finally, the mask being at a third temperature, higher than the second temperature, a third layer is deposited through the opening of the mask.Type: GrantFiled: June 9, 2010Date of Patent: August 13, 2013Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Steve Martin, Nicolas Dunoyer, Sami Oukassi, Raphael Salot
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Patent number: 8475963Abstract: The microbattery is formed by a stack of solid thin layers on a substrate which, starting from the substrate, successively comprises a first electrode, a solid electrolyte and a second electrode/current collector assembly. A first surface and a second surface of the electrolyte are respectively in contact with a main surface of the first electrode and a main surface of the second electrode/current collector assembly. The dimensions of the main surface of the first electrode are smaller than the dimensions of the main surface of said assembly, and the dimensions of the first surface of the solid electrolyte are smaller than the dimensions of the second surface of the solid electrolyte. The solid electrolyte is furthermore not in contact with the substrate.Type: GrantFiled: March 4, 2010Date of Patent: July 2, 2013Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Sami Oukassi, Raphael Salot, Nicolas Dunoyer, Steve Martin
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Publication number: 20130095381Abstract: A microbattery that includes, in succession starting from a first substrate: a first current collector, a first electrode, an electrolyte, a second electrode consisting of a solder joint, a second current collector and a second substrate. Additionally, a method for manufacturing a microbattery, which includes the following steps: forming a thin-film multilayer including, in succession from the first substrate, a first current collector, a first electrode, an electrolyte and a first metal film; forming a second current collector on a face of a second substrate; and forming a second electrode by soldering the first metal film and the second current collector together, said substrates being placed facing each other during assembly.Type: ApplicationFiled: May 31, 2011Publication date: April 18, 2013Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Sami Oukassi, Nicolas Dunoyer, Raphael Salot
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Patent number: 8389138Abstract: The lithium-ion microbattery comprises a positive electrode having a first Li+ ion storage capacity and a first thickness made from a first lithium insertion material, an electrolyte and a negative electrode having a second storage capacity and a second thickness made from a second insertion material. The thicknesses are such that the ratio of the first storage capacity over the second storage capacity is greater than or equal to 10 and lower than or equal to 1000. During the first charging of the micro-battery, the Li+ ions are inserted in the negative electrode and completely saturate the second insertion material. When initial charging is continued, they form a metallic lithium layer between the electrolyte and the lithium-saturated negative electrode by electroplating. During the subsequent charging and discharging cycles, only the metallic lithium layer participates in transfer of lithium ions.Type: GrantFiled: June 18, 2010Date of Patent: March 5, 2013Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Sami Oukassi, Frédéric Le Cras, Steve Martin, Raphael Salot
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Publication number: 20120321938Abstract: The invention relates to a microbattery that comprises a stack on a substrate, covered by an encapsulation layer and comprising first and second current collector/electrode assemblies, a solid electrolyte and electrical connections of the second current collector/electrode assembly to an external electrical load. The electrical connections are formed by at least two electrically conductive barriers passing through the encapsulation layer from an inner surface to an outer surface of the encapsulation layer. Each of the barriers has a lower wall in direct contact with a front surface of the second current collector/electrode assembly and an upper wall opening onto the outer surface of the encapsulation layer. The barriers form a compartmentalization network within the encapsulation layer.Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Inventors: Sami Oukassi, Philippe Coronel
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Patent number: 8153305Abstract: The invention relates to a solid electrolyte, to a process for its manufacture and also to devices comprising it. The electrolyte of the invention is an amorphous solid of formula SivOwCxHyLiz, in which v, w, x, y and z are atomic percentages with 0?v?40, 5?w?50, x>12, 10?y?40, 1?z?70, and 95%?v+w+x+y+z?100%. The electrolyte of the invention finds application in the field of electronics and microbatteries in particular.Type: GrantFiled: May 7, 2008Date of Patent: April 10, 2012Assignees: Commissariat a l'Energie Atomique, St Microelectronics SAInventors: Steve Martin, Raphaël Salot, Pascal Faucherand, Sami Oukassi, Lucie Jodin
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Publication number: 20110311883Abstract: The microbattery is formed by a stack of solid thin layers on a substrate which, starting from the substrate, successively comprises a first electrode, a solid electrolyte and a second electrode/current collector assembly. A first surface and a second surface of the electrolyte are respectively in contact with a main surface of the first electrode and a main surface of the second electrode/current collector assembly. The dimensions of the main surface of the first electrode are smaller than the dimensions of the main surface of said assembly, and the dimensions of the first surface of the solid electrolyte are smaller than the dimensions of the second surface of the solid electrolyte. The solid electrolyte is furthermore not in contact with the substrate.Type: ApplicationFiled: March 4, 2010Publication date: December 22, 2011Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Sami Oukassi, Raphael Salot, Nicolas Dunoyer, Steve Martin
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Publication number: 20100326814Abstract: The method for eliminating metallic lithium on a support comprises a plasma application step. The plasma is formed from a carbon source and an oxygen source with a power comprised between 50 and 400 W. It transforms the metallic lithium into lithium carbonate. The method then comprises a dissolution step of the lithium carbonate in an aqueous solution.Type: ApplicationFiled: June 18, 2010Publication date: December 30, 2010Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Sami Oukassi, Lucie Le Van-Jodin, Raphaël Salot
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Publication number: 20100330401Abstract: The lithium-ion microbattery comprises a positive electrode having a first Li+ ion storage capacity and a first thickness made from a first lithium insertion material, an electrolyte and a negative electrode having a second storage capacity and a second thickness made from a second insertion material. The thicknesses are such that the ratio of the first storage capacity over the second storage capacity is greater than or equal to 10 and lower than or equal to 1000. During the first charging of the micro-battery, the Li+ ions are inserted in the negative electrode and completely saturate the second insertion material. When initial charging is continued, they form a metallic lithium layer between the electrolyte and the lithium-saturated negative electrode by electroplating. During the subsequent charging and discharging cycles, only the metallic lithium layer participates in transfer of lithium ions.Type: ApplicationFiled: June 18, 2010Publication date: December 30, 2010Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Sami Oukassi, Frédéric Le Cras, Steve Martin, Raphaël Salot
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Publication number: 20100310758Abstract: The microcomponent, for example a microbattery, comprising a stack with at least two superposed layers on a substrate, is made using a single steel mask able to expand under the effect of temperature. The mask comprises at least one off-centered opening. The mask being at a first temperature, a first layer is deposited through the opening of the mask. The mask being at a second temperature, higher than the first temperature, a second layer is deposited through the opening of the mask. Finally, the mask being at a third temperature, higher than the second temperature, a third layer is deposited through the opening of the mask.Type: ApplicationFiled: June 9, 2010Publication date: December 9, 2010Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Steve MARTIN, Nicolas Dunoyer, Sami Oukassi, Raphaël Salot
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Publication number: 20090155685Abstract: This lithium electrochemical device includes a stack of layers suitable for constituting a micro-battery deposited on a substrate and encapsulated using a protective cap sealed onto the substrate. It includes two collectors of the current generated by the micro-battery and at least one insulating layer inert as regards lithium. The collectors and the insulating layer or layers are deposited on the substrate. The protective cap is sealed onto the substrate using the layers constituting the current collectors and the insulating layer or layers. The cap has layers of the same nature, positioned in the same order in line with their respective layers deposited on the substrate, so that when the cap is sealed onto the substrate, the respective layers deposited on the cap and on the substrate come into contact with each other to provide the actual seal of the cap on the substrate.Type: ApplicationFiled: November 12, 2008Publication date: June 18, 2009Applicants: Commissariat A L'Energie Atomique, St Microelectronics SAInventors: Raphael Salot, Steve Martin, Sami Oukassi
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Publication number: 20080305399Abstract: The invention relates to a solid electrolyte, to a process for its manufacture and also to devices comprising it. The electrolyte of the invention is an amorphous solid of formula SivOwCxHyLiz, in which v, w, x, y and z are atomic percentages with 0?v?40, 5?w?50, x>12, 10?y?40, 1?z?70, and 95%?v+w+x+y+z?100%. The electrolyte of the invention finds application in the field of electronics and microbatteries in particular.Type: ApplicationFiled: May 7, 2008Publication date: December 11, 2008Inventors: Steve Martin, Raphael Salot, Pascal Faucherand, Sami Oukassi, Lucie Jodin
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Publication number: 20080280206Abstract: A process for realizing a positive electrode of a lithium-ion battery utilizes deposition by cathode sputtering in several steps. Two successive deposition steps are separated by a cooling of the electrode during its realization, a first intermediate step of sputtering the target without introducing oxygen, and a second intermediate step of sputtering the target while introducing oxygen. The electrode obtained is of amorphous vanadium oxide and exhibits good capacity and reversibility.Type: ApplicationFiled: May 9, 2008Publication date: November 13, 2008Applicant: STMicroelectronics S.A.Inventor: Sami Oukassi