Patents by Inventor Bernard Viala
Bernard Viala 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: 8537053Abstract: This left-handed substance comprises an array of conductive wires positioned relative to one another in such a way as to present a negative permittivity relative to the electromagnetic waves which have an electrical field parallel to the biggest dimension of these wires and are propagated at a frequency below the electrical plasma frequency of the substance, each wire being made out of a conductive magnetic material having negative permeability for a range of frequencies of the electromagnetic waves below the electrical plasma frequency of the substance and when there is no external artificial static magnetic field. Each wire comprises at least one strip, made out of a conductive magnetic material that extends along the greatest dimension of the wire in a plane of the strip and has a thickness at least twice as small as the skin thickness of the conductive magnetic material.Type: GrantFiled: July 19, 2010Date of Patent: September 17, 2013Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, Centre National de la RechercheInventors: Bernard Viala, Evangeline Benevent, Kevin Garello
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Patent number: 8536962Abstract: A nanoswitch device comprising: at least one stationary element (52) and at least one element (50) which is at least partially made of a magnetic material and which is movable with respect to the stationary element, means of activating the movable element, comprising: and at least one first and one second magnetic means (30, 30?, 40, 40?) each having a planar shape, defining a first and a second plane, in order to generate remanent magnetization in a direction contained within said first plane or perpendicular to this first plane, means (36, 36?) for reversing the direction of the remanent magnetization of at least one of said first and second magnetic means.Type: GrantFiled: March 27, 2009Date of Patent: September 17, 2013Assignee: Commissariat a l'Energie AtomiqueInventors: Lise Bilhaut, Philippe Andreucci, Laurent Duraffourg, Bernard Viala
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Publication number: 20130127455Abstract: A magnetic field vector sensor includes a substrate parallel to a plane, a support mobile relative to it and rotatable about a vertical rotation axis perpendicular to it, a magnetic field source generating a field having a moment in a non-perpendicular direction, the source being fixed to the support with no degree-of-freedom to exert torque on the support when a field to be measured is present, the field being non-collinear with the moment, a transducer to convert torque exerted on the support into a field amplitude of a component of the field along a measurement axis in the plane, wherein the source comprises a magnetostrictive permanent magnet for generating the field having a moment whose direction varies with stress on the magnet, and wherein the sensor further comprises a controllable device to reversibly modify the moment direction, and a stress generator to vary stress and hence moment direction.Type: ApplicationFiled: November 14, 2012Publication date: May 23, 2013Applicants: Institut Polytechnique de Grenoble, Commissariat a I'energie atomique et aux energies alternativesInventors: Dirk Ettelt, Jerome Delamare, Gor Lebedev, Bernard Viala
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Patent number: 8310320Abstract: A nano-resonator device comprising at least one fixed element and at least one mobile element with respect to the fixed element, first electromagnetic means, integrated or fixed on the fixed element, and second electromagnetic means, integrated or fixed on the mobile element, to generate an oscillating movement of the mobile element.Type: GrantFiled: March 27, 2009Date of Patent: November 13, 2012Assignee: Commissariat a l'Energie AtomiqueInventors: Laurent Duraffourg, Philippe Andreucci, Lise Bilhaut, Bernard Viala
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Patent number: 8085039Abstract: A miniature magnetic core includes at least one bar magnet having, in the demagnetized state, a plurality of magnetic domains separated by magnetic walls, the bar magnet having permanent discontinuities placed at least approximately at the probable locations of at least some of these magnetic walls in the absence of these permanent discontinuities. A miniature sensor includes a miniature core that cooperates with at least one excitation coil and at least one detection coil. A method for manufacturing the magnetic core includes identifying the probable location of the magnetic walls, depositing at least a thin film of magnetic material on a support in order to form the core and producing, in said core, discontinuities approximately at the identified locations of the walls.Type: GrantFiled: December 11, 2006Date of Patent: December 27, 2011Assignee: Commissariat a l'Energie AtomiqueInventors: Hélène Joisten, Robert Cuchet, Bernard Viala, Marcel Audoin, Rachid Hida
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Publication number: 20110266642Abstract: According to this method for producing a magnetic tunnel junction, a film of a dielectric material capable of acting as a tunnel barrier is deposited between two nanocrystalline or amorphous magnetic films. The dielectric material constituting the tunnel barrier consists of an at least partially crystalline perovskite, and said material is deposited by ion beam sputtering in a vacuum chamber.Type: ApplicationFiled: May 20, 2011Publication date: November 3, 2011Applicants: Centre National De La Recherche Scientifique, Commissariat A L'Energie Atomique Et Aux Energie AlternativesInventors: Bernard Viala, Marie-Claire Cyrille, Bernard Dieny, Kévin Garello, Olivier Redon
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Publication number: 20110116194Abstract: This variable-response magnetic radiofrequency device integrated into a substrate comprises: a beam that is mobile relative to the substrate having, at each end, a transversal part mechanically anchored to the substrate and at least one central arm connecting the transversal parts to each other, at least one of the transversal parts being made out of a piezoelectric material, actuating electrodes associated with the piezoelectric material to apply a stress on the central arm, a magnetic element directly deposited on the central arm whose permeability varies as a function of the stress, and a conductive strip comprising a central part fixed to an upper face of the magnetic element opposite the lower face of this magnetic element pointed towards the central arm.Type: ApplicationFiled: November 15, 2010Publication date: May 19, 2011Applicants: Commissariat a l'energie atomique et aux energies alternatives, Centre National De La Recherche Scientifique, Universite Brest-Bretagne OccidentaleInventors: Bernard Viala, Smaali Rafik, Patrick Queffelec, Evangeline Benevent, Jean-Philippe Michel
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Patent number: 7902837Abstract: Substrates to be aligned include microcoils arranged at the level of their facing surfaces. In an alignment phase, power is supplied to at least the microcoils of the first substrate, whereas the inductance of the microcoils of the second substrate is measured. The microcoils are preferably flat microcoils in the form of a spiral or a serpentine.Type: GrantFiled: February 6, 2009Date of Patent: March 8, 2011Assignee: Commissariat a l'Energie AtomiqueInventors: Maxime Rousseau, Bernard Viala
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Publication number: 20110012791Abstract: This left-handed substance comprises an array of conductive wires positioned relative to one another in such a way as to present a negative permittivity relative to the electromagnetic waves which have an electrical field parallel to the biggest dimension of these wires and are propagated at a frequency below the electrical plasma frequency of the substance, each wire being made out of a conductive magnetic material having negative permeability for a range of frequencies of the electromagnetic waves below the electrical plasma frequency of the substance and when there is no external artificial static magnetic field. Each wire comprises at least one strip, made out of a conductive magnetic material that extends along the greatest dimension of the wire in a plane of the strip and has a thickness at least twice as small as the skin thickness of the conductive magnetic material.Type: ApplicationFiled: July 19, 2010Publication date: January 20, 2011Applicants: Commissariat a l'energie atomique et aux energies alternatives, Centre National De La Researche ScientifiqueInventors: Bernard Viala, Evangeline Benevent, Kevin Garello
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Publication number: 20100151797Abstract: A radio-frequency device comprises magneto-dielectric elements. At least one of these elements comprises a composite thin film (10). This film (10) comprises a magnetic material (16, 18) offering permeability above 10 at 1 GHz and a dielectric material (12, 22) offering permittivity above 10 at 1 GHz.Type: ApplicationFiled: October 16, 2009Publication date: June 17, 2010Applicants: Commissariat A L'Energie Atomique, Centre National De La Recherche ScientifiqueInventors: Bernard VIALA, Evangeline Benevent, Christoph Dubarry, Kévin Garello
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Publication number: 20100066472Abstract: The inductive micro-device comprises a rectilinear solenoid winding comprising a plurality of disjointed rectangular turns each having predetermined dimensions. At least one of the dimensions of the turns is variable and is determined individually for each turn according to the position of the turn along the winding and to predetermined magnetic characteristics of the winding, in particular a homogeneous magnetic field and/or an optimum quality factor. Said variable dimension of the turns is chosen from the width, length, thickness, height of turn and the value of the gap between two adjacent turns.Type: ApplicationFiled: November 30, 2007Publication date: March 18, 2010Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE, STMICROELECTRONICS S.A.Inventors: Bastien Orlando, Bernard Viala
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Publication number: 20090289747Abstract: A nano-resonator device comprising at least one fixed element and at least one mobile element with respect to the fixed element, first electromagnetic means, integrated or fixed on the fixed element, and second electromagnetic means, integrated or fixed on the mobile element, to generate an oscillating movement of the mobile element.Type: ApplicationFiled: March 27, 2009Publication date: November 26, 2009Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Laurent Duraffourg, Philippe Andreucci, Lise Bilhaut, Bernard Viala
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Patent number: 7608975Abstract: The magnetic device according to the invention is integrated on a substrate and comprises at least one element made of piezoelectric material associated with actuating electrodes, and at least one magnetic element able to deform under the stress of the piezoelectric material element. The device has the form of a beam movable with respect to the substrate, and comprises two transverse parts of predetermined width, along a reference longitudinal axis. The piezoelectric material element is formed by at least a part of a transverse part and each transverse part comprises a zone for mechanical anchoring on the substrate. The transverse parts are connected by at least one central branch, of predetermined width, on which the magnetic element is arranged.Type: GrantFiled: September 11, 2007Date of Patent: October 27, 2009Assignees: Commissariat a l'Energie Atomique, STMicroelectronics SAInventors: Bastien Orlando, Bernard Viala, Sébastien Hentz
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Publication number: 20090243772Abstract: A nanoswitch device comprising: at least one stationary element (52) and at least one element (50) which is at least partially made of a magnetic material and which is movable with respect to the stationary element, means of activating the movable element, comprising: and at least one first and one second magnetic means (30, 30?, 40, 40?) each having a planar shape, defining a first and a second plane, in order to generate remanent magnetization in a direction contained within said first plane or perpendicular to this first plane, means (36, 36?) for reversing the direction of the remanent magnetization of at least one of said first and second magnetic means.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Lise Bilhaut, Philippe Andreucci, Laurent Duraffourg, Bernard Viala
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Publication number: 20090215207Abstract: Substrates to be aligned comprise microcoils arranged at the level of their facing surfaces. In an alignment phase, power is supplied to at least the microcoils of the first substrate, whereas the inductance of the microcoils of the second substrate is measured. The microcoils are preferably flat microcoils in the form of a spiral or a serpentine.Type: ApplicationFiled: February 6, 2009Publication date: August 27, 2009Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Maxime Rousseau, Bernard Viala
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Publication number: 20090140384Abstract: A thin soft magnetic film combines a high magnetization with an insulating character. The film is formed by nitriding Fe-rich ferromagnetic nanograins immersed in an amorphous substrate. A selective oxidation of the amorphous substrate is then performed. The result is a thin, insulating, soft magnetic film of high magnetization. Many types of integrated circuits can be made which include a component using a membrane incorporating the above-mentioned thin film.Type: ApplicationFiled: February 9, 2009Publication date: June 4, 2009Applicants: STMicroelectronics S.A., Commissariat a L'Energie Atomique Batiment LE PONAND DInventors: Guillaume Bouche, Pascal Ancey, Bernard Viala, Sandrine Couderc
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Patent number: 7504007Abstract: A thin soft magnetic film combines a high magnetization with an insulating character. The film is formed by nitriding Fe-rich ferromagnetic nanograins immersed in an amorphous substrate. A selective oxidation of the amorphous substrate is then performed. The result is a thin, insulating, soft magnetic film of high magnetization. Many types of integrated circuits can be made which include a component using a membrane incorporating the above-mentioned thin film.Type: GrantFiled: July 25, 2005Date of Patent: March 17, 2009Assignees: STMicroelectronics S.A., Commissariat a L'Energie AtomiqueInventors: Guillaume Bouche, Pascal Ancey, Bernard Viala, Sandrine Couderc
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Publication number: 20080316647Abstract: A miniature magnetic core includes at least one bar magnet having, in the demagnetized state, a plurality of magnetic domains separated by magnetic walls, the bar magnet having permanent discontinuities placed at least approximately at the probable locations of at least some of these magnetic walls in the absence of these permanent discontinuities. A miniature sensor includes a miniature core that cooperates with at least one excitation coil and at least one detection coil. A method for manufacturing the magnetic core includes identifying the probable location of the magnetic walls, depositing at least a thin film of magnetic material on a support in order to form the core and producing, in said core, discontinuities approximately at the identified locations of the walls.Type: ApplicationFiled: December 11, 2006Publication date: December 25, 2008Inventors: Helene Joisten, Robert Cuchet, Bernard Viala, Marcel Audoin, Rachid Hida
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Publication number: 20080297292Abstract: A radiofrequency device may include an electrically conducting element associated with at least one continuous magnetic element. The first continuous magnetic element may include a substrate coated with a magnetic film having a granular structure, with grains that are inclined to the normal to the substrate, or a columnar texture inclined to the normal of the substrate.Type: ApplicationFiled: July 19, 2006Publication date: December 4, 2008Inventors: Bernard Viala, Sandrine Couderc, Pascal Ancey
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Patent number: 7423509Abstract: The coil comprises a plurality of non-joined turns, each turn comprising a rectangular bottom flat section in a bottom plane and a rectangular top flat section in a top plane and two rising sections. The turns fill almost all of the enveloping surface of the coil, a minimum isolating gap separating the adjacent turns. The top and bottom sections corresponding to one and the same turn are aligned with respect to one another and have a larger width than the width of the corresponding rising sections. The turns constitute a plurality of substantially parallel coil branches, rising sections of two adjacent branches arranged between the two adjacent branches being arranged alternately in a single plane.Type: GrantFiled: October 10, 2007Date of Patent: September 9, 2008Assignees: Commissariat A L'Energie Atomique, Centre National de la Recherche Scientifique, STMicroelectronics SAInventors: Bastien Orlando, Bernard Viala