Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Centre National De La Recherche Scientifique

Jds Uniphase Corporation

Université Du Mans

Thierry Hilt

Fabrice Casset

Xavier Baillin

Bernard Diem

Stéphane Caplet

Laurent Mollard

Bruno Mourey

Loic Joet

Christel Dieppedale

Loïc Joet

Stephane Fanget

Stéphane Fanget

Francois De Crecy

Jean-Philippe Feve

Stephane Moreau

Christine Ferrandon

Nicolas Landru

Herve Boutry

Stephane Durand

Romain Liechti

Remy Franiatte

Magalie Maillard

A micrometric speaker includes a frame, an electromechanical transducer, and a mechanical-acoustic transducer comprising a rigid plate movably mounted in the frame. The electromechanical transducer comprises two piezoelectric actuators and two elastic strips. The frame comprises a central crossmember from which the two strips extend until engaging two lateral coupling edges of the mechanical-acoustic transducer, and the mechanical-acoustic transducer comprises two linearising springs each extending from one of the lateral edges to the rigid plate, to enable, during a deformation of the strips, a movement of the two lateral edges to the central crossmember and reduce the longitudinal constraints applied to the strips during their deformation due to their 'recessed-guided' bending configuration.

Micrometric loudspeaker

A MicroElectroMechanical System is provided, with an active element configured to carry out an electromechanical function, the active element including, from an upper face to a lower face substantially parallel to the upper face, an active layer, a core layer, and a retention layer, the active layer being configured to, under the effect of a first electric signal, go into a mechanically stressed state, configured to generate a bending of the active element in a direction perpendicular to a front face thereof, and vice versa, the active layer, the core layer, and the retention layer being arranged so that a neutral axis, associated with an elongation of zero in a case of bending of the active element, is located in a volume of one or the other of the core layer and of the retention layer, and the core layer further includes at least 20% recesses in its volume.

Electromechanical microsystem comprising an active element having a structured core layer

A mechanical microsystem including a pair of elastically deformable elements, a mechanical hinge joining the deformable elements together, and at least two electroactive layers. The microsystem is configured such that, from a rest position wherein the deformable elements fall into a plane, a deformation of one of the deformable elements displacing it outside of the plane induces an electric current circulation in one of the two electroactive layers, and/or conversely. Each deformable element has a front face and a rear face opposite one another and substantially parallel to the plane. A first electroactive layer is arranged together with a first deformable element on its rear face, and a second electroactive layer, different from the first layer, is arranged with a second deformable element, different from the first element, on its front face.

Mechanical microsystem and associated manufacturing method

The invention relates to an optical device () comprising:

Optical device

This locomotion device includes a mechanism suitable for converting the pivoting of a roller into a movement of a pad to an advanced position in which it brakes this roller, this mechanism includes a planetary gear set having: a planetary wheel attached to a sole and the axis of revolution of which coincides with a pivoting axis of the roller and a satellite gear rotated by the planetary wheel about an axis of revolution attached without any degree of freedom to the roller and a pin movable by the satellite gear between: a near position in which it pushes and maintains the pad in an advanced position and a distant position in which it allows the movement of the pad from its advanced position to a retracted position.

Locomotion device with rollers

An actuator comprising two devices each comprising an out-of-plane deformable element, said deformable element comprising a first fixed end anchored on a substrate and a second free end relative to the substrate, said device also comprising means to guide the second free end in in-plane translation along a first direction, the first deformable element being capable of deforming out-of-plane through application of a stimulus so that the second free end draws close to the first fixed end following in-plane translational movement. The actuator also comprises an element mobile in rotation about an axis orthogonal to the plane and mechanically linked to the free ends of the deformable elements, and a translationally mobile element mechanically linked to the rotationally mobile element.

Device to convert out-of-plane motion to in-plane motion and/or conversely

An electrical connector allowing a connection between two substantially facing electrical contacts respectively pertaining to a housing and a support, and including a main body including a first end for secure connection thereof to the housing and a second end for secure connection thereof to the support, the main body being bent in at least one bending area.

Electrical connectors having a bent main body for electrical connection between a housing and a support, and being disposed as a grid array or network

A locomotion device on castors including: at least one castor mechanically connected to a sole to roll along a ground, the castor being mounted to rotate about an axis of rolling parallel to a plane of the sole and also about an axis of rotation perpendicular to the plane of the sole; a controllable electromechanical braking device configured to apply a braking torque to the castor that varies according to a braking command received; an inertial unit configured to measure a physical parameter indicative of a steering angle; and a central processing unit programmed to establish the braking command according to the physical parameter measured by the inertial unit and to transmit the established braking command to the braking device to apply to the castor a braking torque that varies according to the steering angle.

Locomotion device on castors

A microsystem for converting pressure difference in fluid into mechanical displacement includes input and output nozzles, two interleaved parts, one of which is mobile part, between which the fluid flows. During displacement, the parts define an expanding fluid pocket that moves from the input nozzle to the output nozzle. The micro-system also includes top and bottom planes between which the mobile part is mounted for displacement relative to each plane, an overhanging distal portion along which the fluid flows, and a proximal portion mechanically linked to a plane via a link allowing only longitudinal translation of the proximal portion, and a reinforcement including a first side fastened to one of the planes and, a second side that is either fastened to or in sliding contact with the overhanging distal portion of the mobile part to limit its deformation in a transverse direction perpendicular to the longitudinal direction.

Microsystems for compressing or for converting a pressure difference into a displacement

The invention relates to a microsystem for converting a difference in pressures in a fluid into mechanical movement, this microsystem comprising: &#x2014;an inlet nozzle () for compressed fluid and an outlet nozzle () for expanded fluid, &#x2014;at least two arms (), at least one of which is hinged and between which flows the fluid in order to pass from the inlet nozzle to the outlet nozzle by moving these arms with respect to one another, the arms () being designed and hinged such that, while they move, they define at least one pocket of fluid which is moved away from the inlet nozzle in order then to return to the outlet nozzle while at the same time increasing in volume, each of the arms () being mechanically connected to a single plane ().

Microsystems for converting pressures and compression

A wheel includes a tire, an electrical device requiring power for operation, and a conversion system for providing electrical energy for powering the electrical device. The electrical energy is obtained from conversion of a difference between pressure of a gas confined under pressure within the tire and ambient pressure of air outside the tire. The conversion system includes an inlet nozzle fluidly connected to the gas confined under pressure in the tire, an outlet nozzle fluidly connected to the air outside the tire, a movable arm configured to be moved by gas expanding while flowing from the inlet nozzle to the outlet nozzle, and an electromechanical transducer capable of converting mechanical energy from movement of the arm into electrical energy used to power the electrical device.

Wheel with electromechanical conversion system

The invention pertains to a method for manufacturing a microelectronic device on a substrate comprising at least one first electrical component and one second electrical component distributed respectively in first and second levels stacked one on top of the other on the substrate, this method comprising:

Method for manufacturing a microelectronic device and a microelectronic device thus manufactured

The invention concerns a device for encapsulating an element within a microcavity made on a support (), this device comprising an encapsulating membrane () capable of forming at least one part of the microcavity, characterized in that the device comprises at least one arm which mechanically attaches the membrane to the support, this arm being capable of bending so as to shift the membrane between: 

Encapsulation device and method, microcapsule incorporating this device

A microcavity structure including: a first substrate, a cover attached to the first substrate such that a space formed between the cover and the first substrate forms the microcavity, at least one hole passing through the cover, and at least one closing flap of the hole placed inside the microcavity and including at least two portions of materials with different thermal expansion coefficients placed one against the other, at least one first end of the two portions being mechanically linked to the cover, at least a second end of the two portions being free, and at least a part of the closing flap being placed opposite the hole, the two portions being capable of closing or not the hole under the effect of a temperature variation.

Microcavity structure and encapsulation structure for a microelectronic device

Application of a modular coaxial package design, compatible with telecommunication passive component packaging, to microchip lasers, in particular to passively Q-switched microlasers, pumped with a fiber-coupled diode, is disclosed. The number of parts is thereby reduced while providing the adequate degrees of freedom for the active or passive alignment of the optical elements within the package.

Growing community of inventors

Barraux, France

Thierry Hilt