Patents by Inventor Emmanuel Defay
Emmanuel Defay 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: 20230077545Abstract: A piezoelectric device comprising a transparent substrate; a transparent barrier layer on the substrate; a transparent piezoelectric layer on the transparent barrier layer; a transparent layer of interdigitated electrodes on the transparent piezoelectric layer; wherein the piezoelectric device further comprises a transparent dielectric layer at least on the portion of piezoelectric layer that is between successive fingers of the transparent layer of interdigitated electrodes, the transparent dielectric layer having a refractive index lower than a refractive index of the transparent layer of interdigitated electrodes and a dielectric strength superior to 3 MV/m.Type: ApplicationFiled: January 22, 2021Publication date: March 16, 2023Inventors: Emmanuel DEFAY, Stéphanie GIROD, Sebastjan GLINSEK, Aymen MAHJOUB
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Publication number: 20230033512Abstract: A heat exchanger comprising at least two substrates made of electro-caloric and/or pyroelectric material and stacked one on the other so as to form between the at least two substrates and at least one channel for a fluid; at least two electrodes at two opposed ends of the at least two substrates; a housing enclosing the stack of the at least two substrates and the at least two electrodes, and provided with at least one fluid connecting port; wherein the housing is made of a heat shrinkable flexible tube that is shrunk onto the stack of the at least two electrodes and forming the at least one fluid connecting port.Type: ApplicationFiled: February 19, 2021Publication date: February 2, 2023Inventors: Emmanuel DEFAY, Mathieu GERARD, Alvar TORELLÓ MASSANA
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Patent number: 11299646Abstract: An inkjet-printing-base process for depositing functional materials, for example PZT, on a substrate, in various instances platinized silicon. Substrate templating (via SAMs) and material deposition are both performed by an inkjet printing process. Additionally, a composition to be used as a SAM precursor ink which is a thiol in a solvent mixture, wherein the composition can be 1 dodecanethiol in a solvent mixture of 2-methoxyethanol and glycerol.Type: GrantFiled: April 27, 2018Date of Patent: April 12, 2022Assignee: Luxembourg Institute of Science And Technology (LIST)Inventors: Nicolas Godard, Daniele Sette, Sebastjan Glinsek, Emmanuel Defay
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Publication number: 20210379898Abstract: An only inkjet-printing-based process for depositing functional materials, in various instances PZT, Bi-based material or (K,Na)-based material, on a substrate, in various instances platinized silicon. Substrate templating (via SAMs) and material deposition are both performed by an inkjet printing process. Additionally, a composition to be used as a SAM precursor ink which is a thiol in a solvent mixture. Further, a cartridge for a printing machine with such a composition. Still further, the use of such a cartridge, alone, or as a kit with another cartridge containing a precursor of the functional material, in particular to perform both steps of the printing method. Finally, a product, for instance a microsystem, obtained by the process.Type: ApplicationFiled: October 24, 2019Publication date: December 9, 2021Inventors: Nicolas GODARD, Daniele SETTE, Sebastjan GLINSEK, Emmanuel DEFAY
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Publication number: 20210155817Abstract: An inkjet-printing-base process for depositing functional materials, for example PZT, on a substrate, in various instances platinized silicon. Substrate templating (via SAMs) and material deposition are both performed by an inkjet printing process. Additionally, a composition to be used as a SAM precursor ink which is a thiol in a solvent mixture, wherein the composition can be 1 dodecanethiol in a solvent mixture of 2-methoxyethanol and glycerol.Type: ApplicationFiled: April 27, 2018Publication date: May 27, 2021Inventors: Nicolas Godard, Daniele Sette, Sebastjan Glinsek, Emmanuel Defay
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Patent number: 10707405Abstract: This invention relates to an electromechanical actuator comprising a support and a deformable element comprising a portion anchored to at least one anchoring zone of the support and mobile portion, the deformable element comprising an electro-active layer, a reference electrode arranged on a first face of the electro-active layer an actuating electrode arranged on a second face, opposite the first face, of the electro-active layer comprises a capacitive device for measuring the deformation of the deformable element, said device being at least partially formed by a capacitive stack comprising a measuring electrode on the second face of the electro-active layer, a measuring portion of the reference electrode located facing the measuring electrode, and a portion of the electro-active layer inserted between the measuring electrode.Type: GrantFiled: June 16, 2017Date of Patent: July 7, 2020Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Julie Abergel, Jean-Sebastien Danel, Emmanuel Defay, Gwenael Le Rhun
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Publication number: 20190296216Abstract: The invention is directed to a transparent piezoelectric device comprising a transparent substrate; a transparent piezoelectric layer; a transparent layer of interdigitated electrodes. The transparent piezoelectric layer is disposed between the substrate and the layer of interdigitated electrodes.Type: ApplicationFiled: May 16, 2017Publication date: September 26, 2019Inventors: Daniele Sette, Emmanuel Defay
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Publication number: 20170365770Abstract: This invention relates to an electromechanical actuator comprising a support and a deformable element comprising a portion anchored to at least one anchoring zone of the support and mobile portion, the deformable element comprising an electro-active layer, a reference electrode arranged on a first face of the electro-active layer an actuating electrode arranged on a second face, opposite the first face, of the electro-active layer comprises a capacitive device for measuring the deformation of the deformable element, said device being at least partially formed by a capacitive stack comprising a measuring electrode on the second face of the electro-active layer, a measuring portion of the reference electrode located facing the measuring electrode, and a portion of the electro-active layer inserted between the measuring electrode.Type: ApplicationFiled: June 16, 2017Publication date: December 21, 2017Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Julie ABERGEL, Jean-Sebastien DANEL, Emmanuel DEFAY, Gwenael LE RHUN
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Patent number: 9791181Abstract: A module for warming and, alternately, for cooling, this module comprising an electrocaloric capacitor, an electrical energy storage device and a controllable circuit for transferring electrical energy between the electrocaloric capacitor and the energy storage device. The controllable circuit comprising an inductor connected between the electrocaloric capacitor and the storage device and at least one controllable switch. There is further included a unit programmed to control the switch so as to cause the transfer circuit to toggle successively into the following states and in the following order: an energy recovery state, a disabled state in which it electrically isolates the electrocaloric capacitor and the energy storage device, an energy release state and the disabled state, and each time to maintain the transfer circuit in the disabled state for a duration greater than a predetermined threshold.Type: GrantFiled: May 23, 2014Date of Patent: October 17, 2017Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Emmanuel Defay, Ghislain Despesse, Neil Mathur
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Patent number: 9673269Abstract: An integrated capacitor comprises a layer of dielectric material known as functional dielectric material based on crystallized material of perovskite type, between at least one first electrode known as a bottom electrode at the surface of a substrate and at least one second electrode known as a top electrode, said electrodes being electrically insulated by a layer of electrically insulating material in order to allow at least one contact on the top electrode. The electrically insulating material is made of an amorphous dielectric material of perovskite type having a dielectric constant lower than that of the crystallized material of perovskite type. The contact is formed from an etched contacting layer in contact with the electrically insulating dielectric layer level with its surface parallel to the plane of the layers. A process for manufacturing such an integrated capacitor is also provided.Type: GrantFiled: September 4, 2011Date of Patent: June 6, 2017Assignee: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Emmanuel Defay, Gwenaël Le Rhun, Aurélien Suhm
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Patent number: 9406439Abstract: The invention relates to a process for forming a lead-based ceramic oxide dielectric material comprising at least one pyrochlore crystalline phase, which process comprises the following steps: a) a step of depositing at least one amorphous layer of said lead-based ceramic oxide material on a substrate; and b) a crystallization annealing step carried out on said amorphous layer at a temperature not exceeding 550° C., by means of which a lead-based ceramic oxide dielectric material comprising at least one pyrochlore phase is obtained. Application to the fabrication of capacitors on integrated circuits.Type: GrantFiled: September 22, 2009Date of Patent: August 2, 2016Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Xiaohong Zhu, Emmanuel Defay, Eric Fribourg-Blanc
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Patent number: 9326423Abstract: A method for limiting temperature variation of an electrical component includes detecting a switch from passive to active states and, in response, varying a potential difference between capacitor electrodes from a first value to a second value, the electrodes being mechanically and electrically insulated from each other by a layer of electrocaloric dielectric, and in response to detecting a switch from active to passive states, varying the potential difference between the electrodes from the second to the first value.Type: GrantFiled: August 2, 2013Date of Patent: April 26, 2016Assignee: Commissariat a L'Energie Atomique et Aux Energies AlternativesInventors: Emmanuel Defay, Neil Mathur, Sohini Kar-Narayan, Jordane Soussi
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Patent number: 9281798Abstract: A device comprises at the input a first component (PA) having a first output impedance (Z1), at the output a second component (ANT) having a second input impedance (Z2), and an impedance-matching network between said first and second components. Because the first and/or the second impedance vary/varies, said impedance-matching network comprises a filter (Fadp), with an impedance that is matchable to the first and second impedances, located between said first and second components and comprising at least two acoustic wave coupled resonators. At least one of the resonators comprises a perovskite type material and means for applying a voltage to said resonator, which enable the permittivity and the impedance thereof to be varied.Type: GrantFiled: June 30, 2011Date of Patent: March 8, 2016Assignee: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Jean-Baptiste David, Christophe Billard, Emmanuel Defay
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Patent number: 9190599Abstract: In a process for fabricating a membrane, including, on a substrate, a thin-film multilayer including a film of piezoelectric material placed between a top electrode film and a bottom electrode film and an elastic film supporting said piezoelectric film, the process includes: determining at least one concavity/convexity curvature of said membrane along an axis parallel to the plane of the films so that at least one inflection point is defined, said point allowing a first region and a second region, corresponding to a concave part and a convex part or vice versa, to be isolated; depositing, on the surface of the substrate, a thin-film multilayer including at least one film of piezoelectric material, one bottom electrode film and one top electrode film; and structuring at least one of the electrode films to define at least said first membrane region, in which an electric field perpendicular to the plane of the films may be applied, and at least said second region, in which an electric field parallel to the planeType: GrantFiled: September 14, 2010Date of Patent: November 17, 2015Assignee: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Emmanuel Defay, Gwenaël Le Rhun
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Patent number: 9106199Abstract: An acoustic wave device comprising at least one surface acoustic wave filter and one bulk acoustic wave filter, the device including, on a substrate comprising a second piezoelectric material: a stack of layers including a first metal layer and a layer of a first monocrystalline piezoelectric material, wherein the stack of layers is partially etched so as to define a first area in which the first and second piezoelectric materials are present and a second area in which the first piezoelectric material is absent; a second metallization at the first area for defining the bulk acoustic wave filter integrating the first piezoelectric material, and a third metallization at the second area for defining the surface acoustic wave filter integrating the second piezoelectric material.Type: GrantFiled: October 4, 2010Date of Patent: August 11, 2015Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Chrystel Deguet, Laurent Clavelier, Emmanuel Defay, Alexandre Reinhardt
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Patent number: 9059677Abstract: An electromechanical device having a resonator using acoustic waves propagating laterally within a piezoelectric plane resonant structure and electrodes on a face of said structure. The resonant structure comprises: a transduction region having a transduction length and generating acoustic waves; a free propagation region for the acoustic waves, adjacent to the transduction region and defined the plane of the transduction region; the resonant structure length being equal to an integer number of half-wavelengths, the resonance frequency of said resonator equaling the average propagation velocity of the wave within the structure divided by said wavelength, to adjust the quality factor of the resonator fixed by the length of the resonant structure and the coupling coefficient fixed by the ratio of the transduction length over the length of the resonant structure; the resonant structure defined by the assembly of the transduction region and the propagation region being laterally bounded by reflection regions.Type: GrantFiled: April 25, 2012Date of Patent: June 16, 2015Assignee: Commissariat A L'Energie Atomique ET Aux Energies AlternativesInventors: Alexandre Reinhardt, Emmanuel Defay, Francois Perruchot
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Publication number: 20140345296Abstract: A module for warming and, alternately, for cooling, this module comprising an electrocaloric capacitor, an electrical energy storage device and a controllable circuit for transferring electrical energy between the electrocaloric capacitor and the energy storage device. The controllable circuit comprising an inductor connected between the electrocaloric capacitor and the storage device and at least one controllable switch. There is further included a unit programmed to control the switch so as to cause the transfer circuit to toggle successively into the following states and in the following order: an energy recovery state, a disabled state in which it electrically isolates the electrocaloric capacitor and the energy storage device, an energy release state and the disabled state, and each time to maintain the transfer circuit in the disabled state for a duration greater than a predetermined threshold.Type: ApplicationFiled: May 23, 2014Publication date: November 27, 2014Inventors: Emmanuel Defay, Ghislain Despesse, Neil Mathur
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Patent number: 8801274Abstract: A transducer for transducing time-related temperature variations into a difference in potentials includes an upper conductive electrode designed to be exposed to a time-related temperature variation to be measured, a lower conductive electrode, and at least one layer of pyroelectric material based on a III-V nitride directly interposed between the upper and lower conductive electrodes to generate, between the upper and lower conductive electrodes, a difference in potentials corresponding to the temperature variation even in the absence of external mechanical stress.Type: GrantFiled: May 5, 2011Date of Patent: August 12, 2014Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Jean-Francois Mainguet, Alain Chambron, Bruno Charrat, Emmanuel Defay, Guy-Michel Parat
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Patent number: 8779651Abstract: An apparatus for converting vibratory mechanical energy into electrical energy includes a mobile mass, a support, first and second beams, the second being piezoelectric, and a junction element. The first beam extends longitudinally between the support and the mass, each of which has a beam end embedded therein. The second beam links the support and the mobile mass. Its elongation stiffness is lower than that of the first beam. The junction element extends between the beams. A first assembly, with a first bending stiffness, comprises the first beam, the second beam, and the junction element. A second assembly consists of the first assembly minus the second beam. Its bending stiffness is less than or equal to half of that of the first assembly.Type: GrantFiled: January 31, 2012Date of Patent: July 15, 2014Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Bouhadjar Ahmed Seddik, Emmanuel Defay, Ghislain Despesse
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Patent number: 8736145Abstract: A micro or nano electromechanical transducer device formed on a semiconductor substrate comprises a movable structure which is arranged to be movable in response to actuation of an actuating structure. The movable structure comprises a mechanical structure having at least one mechanical layer having a first thermal response characteristic, at least one layer of the actuating structure having a second thermal response characteristic different to the first thermal response characteristic, and a thermal compensation structure having at least one thermal compensation layer. The thermal compensation layer is different to the at least one layer and is arranged to compensate a thermal effect produced by the mechanical layer and the at least one layer of the actuating structure such that the movement of the movable structure is substantially independent of variations in temperature.Type: GrantFiled: November 25, 2009Date of Patent: May 27, 2014Assignees: Freescale Semiconductor, Inc., Commissariar á l'Energie Atomique at aux Energies Alternatives (CEA)Inventors: Lianjun Liu, Sergio Pacheco, Francois Perruchot, Emmanuel Defay, Patrice Rey