Commissariat a L'energie Atomique

Other

Line Vieux-Rochaz

Jean-Marc Fedeli

Robert Cuchet

Jean Mouchot

Andre Chenevas-Paule

Marie-Helene Vaudaine

Michel Poirier

Olivier Girard

Igor Melnick

Miguel Saro

Philippe Pougnet

Claire Baragatti

Thierry Braisaz

Marie-H&eacute;l&egrave;ne Vaudaine

A method and an apparatus of a magnetic field sensor structure are disclosed. The magnetic field sensor structure is formed by a bridge of four magnetoresistors (), wherein each magnetoresistor has a longitudinal direction, and each magnetoresistor () is polarised by magnets (). Also, each magnet has a main magnetisation field along an axial magnetisation direction, and a magnetic leakage field. The polarisation magnets () and the magnetoresistors () are arranged in the form of layers on the same substrate. In one embodiment, the polarisation magnets () are at the same level as the magnetoresistors () wherein the polarisation magnets () have the same main magnetisation direction, which is contained in the plane of the layers. The magnetoresistors have their longitudinal direction parallel with that of the axial direction of the magnets. In one embodiment, two magnetoresistors are arranged in the axial field of magnets and two others are in the magnet leakage field.

Sensor structure and magnetic field sensor

Electrical connection between two faces of a substrate and manufacturing process

At least two magnetoresistors laid out perpendicularly are used. These magnetoresistors are installed in a bridge, the measurement signal being taken from the mid-point of the bridge. This signal is linear over a very wide range. Application to measurement of the orientation of a magnetic field or the angular position of an object.

Linear angular sensor with magnetoresistors

A magnetoresistive component and transducer for use therewith. The magnetoresistive component has a multilayer-type magnetoresistive strip bent in accordance with a repeated geometrical pattern (7a,7b). The pattern has at least one series of substantially parallel sections (7a,7b) for reducing the demagnetizing fields. The magnetoresistive strip (2) is formed from a stack (13) of magnetic metallic material layers (14) separated by non-magnetic metallic material layers (15). The magnetoresistive component is applicable to a transducer for reading information recorded in magnetic form or for detecting weak magnetic fields.

Magnetoresistive component having a multilayer strip with a geometrical

Magnetic field sensor having a magnetoresistance bridge with a pair of

The encoder has at least one magnetoresistor (120, 220, 320, 322, 324, 326) and the magnetic support has a succession of magnetized regions (242, 342, 442), characterized in that the magnetic encoder also has a flux guide (154, 254, 354, 454), which has reading pole pieces (256, 256', 356) separated by at least one air gap (252, 352, 452) having a length (g) less than the smallest spacing of the magnetized regions.

Magnetic encoder for reading marks on an associated magnetic track

A magnetic reading head having a magneto resistant element and improved polarization means. The polarization conductor is associated with a supplementary magnetic layer positioned opposite to the magnetoresistant element.

Magnetic reading head having a magnetoresistant element and improved

A basic photovoltaic stack is constituted by a semiconducting layer interposed between a layer forming an ohmic contact and a layer forming a Schottky contact. A second photovoltaic stack having the same structure as the basic stack is formed on this latter and includes one of the layers forming an ohmic or Schottky contact. The layer or layers forming an ohmic contact are connected together so as to constitute a first output terminal of the photovoltaic generator. The layer or layers forming a Schottky contact are connected together so as to constitute a second output terminal of the generator.

Photovoltaic generator

Growing community of inventors

Sassenage, France

Line Vieux-Rochaz