Abstract: Process for producing a semiconductor field detector magnetic head and head obtained by this process. On a silicon substrate (30) is produced a semiconductor sensor (32) and then the magnetic circuit of the head (36,48,50,52,54). Application to magnetic recording. (FIG.

Abstract: The blowing ramp formed by the blowing elements makes it possible to maintain under an ultra-clean atmosphere the planar services of objects during their transportion or conveying, whilst using a limited air flow; the blowing elements are mainly constituted by a plate 2 having a central orifice 6 facing which is located a pipe 4 supplied with ultra-clean air; the process consists of placing the surface (11) of the object (10) at a distance (d) of approximately 1 mm from the blowing surface (7). The flow of air between these two surfaces is easily regulated in such a way as to be laminar, thus providing protection against ambient particulate contamination, which application may be applied to the conveying of silicon wafers.

Abstract: Magnetoresistant magnetic reading head and process for producing the same. The head comprises a magnetoresistant strip beneath a magnetic spacer. This strip is obtained by etching using the spacer partly as a mask. Therefore, the magnetoresistant element is self-aligned with respect to the spacer and is buried beneath it. Such a device finds particular application in magnetic recording and reading.

Abstract: A horizontal magnetic reading head for a perpendicular recording on a magnetic tape.A magnetic layer (50,51,52) is interrupted by two spacers arranged symmetrically with respect to the plane of a monopole (56). A U-shaped magnetoresistant element is constituted by two ribbons (34,35) parallel to the monopole and respectively located in the two spacers of the magnetic layer. The two ribbons are joined by a magnetoresistant bridge (36). Optionally, the head can have a conductor coil so that it could write in addition to read.

Abstract: In order to improve the sensitivity of the head when reading, without excessively reducing its efficiency when writing, the magnetic circuit used is left open. The reading flux then re-closes, essentially across the magnetoresistant element (MR).

Abstract: A rectangular parallelepiped having a width of approximately 1 micron and a height of several microns and they are separated by an amagnetic spacer.

Abstract: Passage having a first type of unitary elements constituted by unitary pipes (10) provided with nozzles (12) and a fastening system (16) on each of its sides, as well as a second type of unitary elements constituted by a skirt (18) made from a flexible material and which is impermeable to air. These unitary elements are assembled with one another, so as to adapt at random the geometry of the passage.

Abstract: Device for conveying on an air cushion with magnetic guidance having a track (12) provided with air jet pipes issuing obliquely in one longitudinal direction onto its upper face, permitting the longitudinal displacement of a disk (30) without contact with the track (12). The track supports a first magnetic guidance device (34) running on its upper face. The face facing the track (12) of disk (30) is provided with a second magnetic device facing the first magnetic guidance device (34). The device is applied to the conveying of silicon wafers in an ultra-clean environment.

Abstract: Device for communication between two media (2, 3) separated by a slotted wall (1). On the slot (4) is placed a packing with lips (13, 14), the edge (15, 16) of which is covered with magnets (17, 18) having an attracting action. Arm (5) passing through the slot (4) is provided with magnets (21, 22), which locally move the lips (13, 14) apart. This prevents friction and deformations.

Abstract: A recess is etched in a substrate and is filled by a magnetic film. A coil is formed in an insulating film and magnetic contact pads are formed. Two magnetic films are formed in an insulating film and then in a hard film are formed two pole pieces separated by an amagnetic spacer.

Abstract: Substrate for magnetic disk memory and production process.The substrate comprises an aluminium wafer (10) and two plastic sheets (39,41) pressed hot against the wafer. The outer faces (38,40) have a good flatness or smoothness, as a result of the surface state of the pressing plates.Application to the production of substrates used in the manufacture of disks for magnetic recording purposes.

Abstract: Magnetic read head for very narrow track and production process. On a silicon substrate (10) is formed a magnetic circuit (P1, P2, P3), whose thickness is equal to the width of the track to be read. This magnetic circuit is interrupted by a magnetic spacer (20) and two slots (F1, F2), in which are inserted elements sensitive to the magnetic field, e.g. magnetoresistors. The latter are connected to an integrated circuit (12) in the silicon substrate. Application to the reading of information recorded on a magnetic track.

Abstract: The installation according to the invention includes a cabinet for storing objects, apparatus for processing these objects, apparatus for transferring these objects between the storage cabinet and processing apparatus for the same, constituted by mobile containers and fixed containers fixed to the processing apparatus. The mobile containers can be coupled to the cabinet and to the fixed containers in order to carry out the transfer of the object to be processed. The installation also includes apparatus for ventilating the interior of the installation in order to permanently subject the objects to a very clean gas flow. This apparatus can be constituted by fans, by internal filters, or by an external pressurized ultraclean gas source.

Abstract: Process for producing a planar structure thin film magnetic head wherein a recess is etched in a substrate and is filled by a magnetic film. A coil is formed in an insulating film and magnetic contact pads are formed. Two magnetic films are formed in an insulating film and then in a hard film are formed two pole pieces separated by a magnetic spacer.

Abstract: An integrated structure is provided for magnetic recording which utilizes a silicon wafer having two parallel faces which are crystal planes of orientation 100. One face is designed so as to constitute a displacement plane when used as a read and write device in a magnetic support. The magnetic head has a horizontal structure and is integrated into the silicon wafer in the face having the displacement plane. An electronic circuit is integrated in the silicon wafer in one of the two faces and connections are provided between the magnetic head and the electronic circuit.

Abstract: In a magnetic material film is etched a first wide, closed channel leaving intact an elongated central portion having a rectilinear axis. A coil is formed in the channel and surrounds the central portion, while being electrically insulated by a dielectric layer. A second channel is etched in a dielectric layer having a planar lateral edge parallel to the axis of the central portion and a thin magnetic film is deposited. A dielectric layer is deposited and etched by RIE, so as to leave a wall on the lateral edge. The magnetic film is then chemically etched so as to leave behind only the portion deposited on the lateral edge. Finally, the second channel is filled with a third hard dielectric material similar to the first.

Abstract: Device for reading and writing on a magnetic recording support.The device comprises magnetic read and write heads located on the upper faces of reliefs forming a catamaran, each head having a coil in a plane parallel to said face and having at least one read and write pole piece flush with the upper face of the reliefs.Application to magnetic disks in computers.

Abstract: The support for a magnetic recording disc according to the invention comprises a metal disk covered by an organic coating and, on the latter, a thin, hard coating of a material based on hydrous silicate or silica.

Abstract: A process for producing a coil for a magnetic recording head and the coil obtained by this process. An insulating film which covers a support is etched in order to give it the shape of a first spiral. The support is then etched by using the insulating film as a mask, forming a groove in the form of a second spiral, which is complementary to the first spiral. A thin metal layer is then deposited on the insulating film used as the mask and simultaneously on the bottom of the etched groove, producing two conductors in the form of complementary spirals which are located in two different planes.

Abstract: A first magnetic material film is deposited on a support, a groove is etched in the first magnetic film which is shaped like a figure eight, a double coil is formed and is wound respectively around the two central pole pieces. An insulating material layer is deposited and etched in step form, the step having a side facing the central channel. An .[.magnetic.]. .Iadd.amagnetic .Iaddend.film is deposited on the thus etched step, and the film is etched so as to only leave a wall perpendicular to the plane of the films. This is followed by the deposition of a magnetic film and then a protective layer, the assembly being divided off so as to expose two pole pieces separated by an .[.air gap.]. .Iadd.amagnetic gap.Iaddend..