Abstract: The present invention relates to a method of forming color laser images. The latent image made up or color subpixels (2) and of non-colored zones is personalized by a laser beam (8) that acts in the laserable layer (3) situated under the color subpixels (2) and the non-colored zones to cause a final personalized color laser image to appear. The invention is applicable to identity documents.

Abstract: This disclosure includes a system and method for producing a back-lit color laser image, and an identity document using this method and back lighting system. The body of the identity document may be transparent. In various implementations, the light back-lights the color laser image which may be formed of sub-pixels partly covered by non-reflective surfaces in the protective layer. The light may enter through tiny holes in decorative patterns on the reverse side of the document. Various implementations may find particular applications for identity cards, credit cards, passports, driving licences, secure entry badges, etc.

Abstract: The present invention relates to forming color laser images that are observable with variable colors. The gray levels are produced by non-reflective, black volumes in a laserable layer that mask the adjacent subpixels and that cause variable colors to appear depending on the angle of observation of the document. The invention is applicable to official documents.

Abstract: A method for forming and a document having a color laser image with high reflective yield, which comprises a sheet of laserable material, sub-pixels in primary colors, the laser beam via carbonization exposing grey levels of the color image, and a substrate. The whole is laminated in various embodiments. The sub-pixels in various embodiments are separated by transparent regions which increase reflectivity and reinforce the white component of the personalised image. Layers of reflective varnish can reinforce reflectivity.

Abstract: Disclosed are examples of methods and documents of a color laser image observable in three dimensions, which comprises a laserable protective sheet, an array of lenses, colored sub-pixels in column form, wherein a laser beam causes the grey levels to appear in two color laser images observable in three dimensions via stereoscopic effect, and a substrate. The whole, in various implementations, may be laminated. The axes of the columns of sub-pixels and of the lenses may be perpendicular. The laser beam may scan the sub-pixels along the axis of the lenses, in various embodiments.

Abstract: The present invention relates to forming color laser images that are observable with variable colors. The gray levels are produced by non-reflective, black volumes in a laserable layer that mask the adjacent subpixels and that cause variable colors to appear depending on the angle of observation of the document. The invention is applicable to official documents.

Abstract: The present invention relates to a method of forming color laser images. The latent image made up or color subpixels (2) and of non-colored zones is personalized by a laser beam (8) that acts in the laserable layer (3) situated under the color subpixels (2) and the non-colored zones to cause a final personalized color laser image to appear. The invention is applicable to identity documents.

Abstract: Disclosed are examples of methods and documents of a colour laser image observable in three dimensions, which comprises a laserable protective sheet, an array of lenses, coloured sub-pixels in column form, wherein a laser beam causes the grey levels to appear in two colour laser images observable in three dimensions via stereoscopic effect, and a substrate. The whole, in various implementations, may be laminated. The axes of the columns of sub-pixels and of the lenses may be perpendicular. The laser beam may scan the sub-pixels along the axis of the lenses, in various embodiments.

Abstract: This disclosure includes a system and method for producing a back-lit colour laser image, and an identity document using this method and back lighting system. The body of the identity document may be transparent. In various implementations, the light back-lights the colour laser image which may be formed of sub-pixels partly covered by non-reflective surfaces in the protective layer. The light may enter through tiny holes in decorative patterns on the reverse side of the document. Various implementations may find particular applications for identity cards, credit cards, passports, driving licences, secure entry badges, etc.

Abstract: A method for forming and a document having a colour laser image with high reflective yield, which comprises a sheet of laserable material, sub-pixels in primary colours, the laser beam via carbonization exposing grey levels of the colour image, and a substrate. The whole is laminated in various embodiments. The sub-pixels in various embodiments are separated by transparent regions which increase reflectivity and reinforce the white component of the personalised image. Layers of reflective varnish can reinforce reflectivity.

Abstract: A slider incorporates welding studs for assembly with a spring arm. Each of the welding studs includes a base that is integral with the slider. The base has a controlled height and is made from a first material. Each of the welding studs further includes a meltable stud member which is placed on the base. The meltable stud member is made from a second material that has a melting point which is lower than that of the first material of the base.

Abstract: A magnetic recording medium and a thin film planar magnetic head form an assembly. The magnetic recording medium of the assembly includes a magnetic coating having a residual magnetization value (Mr) and a thickness value (t) which together form a high product value (Mr)(t) which is preferably greater than about 1.8 memu/cm.sup.2. This coating also has a high coercive field value of Hc which is preferably greater than about 2,200 Oe. The ratio formed by dividing the (Mr)(t)product value by this coercive field value Hc((Mr)(t)/Hc) is preferably approximately 0.7.times.10.sup.-3 memu/cm.sup.2 /Oe or 0.8.times.10.sup.-3 memu/cm.sup.2 /Oe. The product of the (mr)(t) product value and the coercive field value Hc ((Mr)(t)(Hc)) is preferably greater than approximately 4000 Oe.times.memu/cm.sup.2.

Abstract: A magnetic slider assembly includes a spring arm; a magnetic slider including a plurality of welding studs, each of the welding studs including a base which is integral with the slider, the base having a controlled height and being made from a first layer of material which is not meltable at a welding temperature. Each of the welding studs further include a meltable stud member placed on the base, the meltable stud member including the second layer of material positioned on the first layer of material and having a melting point lower than that of the first layer of material and which is meltable at the welding temperature such that after welding, the meltable stud member forms a weld and a minimum parallel spacing between the slider and the spring arm which is substantially equal to the controlled height of the base. The second layer may be formed of either an electrolytically grown material or an etched material that is located on the first layer.

Abstract: Process for making a plane magnetic head and magnetic head obtained by this process.A hard protective layer surrounds polar parts. The non-magnetic spacer and polar parts are flush with the level of this protective layer. This layer is preferably made of diamond like carbon.

Abstract: A high reluctance magnetic head is disclosed.According to the invention, the concentrators are separated from the pole pieces by an amagnetic layer incorporating more particularly a conductive layer.The application is directed to magnetic recording.

Abstract: A magnetic read head having a multilayer magnetoresistant element and a concentrator, and a method of production the magnetic read head. The magnetic head includes a multilayer magnetoresistant element across a head gap of the concentrator positioned to the rear of pole pieces defining the gap of the head. Such a magnetic head may find particular application to magnetic recording.

Abstract: A magnetic layer 16 adopts the shape of an insulating ridge 14 and a multilayer magnetoresistor (MR) functions in a longitudinal mode and underlies the magnetic layer. The device is used for magnetic recording and can be a read-only head or a read-write head.

Abstract: A process of producing a magnetic read head which includes a multilayer magnetoresistant element and a concentrator. The magnetic read head is produced to include a multilayer magnetoresistant element across a head gap of the concentrator positioned to a rear of pole pieces defining the gap of the head. Such a magnetic head may find particular application in magnetic recording systems.

Abstract: A slider for magnetic recording includes at least one ski with a front portion and a rear portion, a read and/or write head located at the rear portion of the slider, the front portion of each ski having first and second steps with, respectively, first and second risers. The first riser of the first step forms with a longitudinal direction of the ski a first angle of between approximately 10.degree. and approximately 60.degree. and the second riser of the second step forms with the longitudinal direction of the ski a second angle which differs from the first angle and is between approximately 20.degree. and approximately 80.degree.. The height of the first riser is between approximately 20 nm and approximately 200 nm and the height of the second riser is between approximately 200 nm and approximately 2 .mu.m.

Abstract: Magnetic read/write head having a writing-compensated magneto-resistant element.In the invention, the head includes, beneath a magnetoresistant element (MR), a conductor element (40) and preferably an additional magnetic layer (44) perforated by an opening (46). The conductor element (40) is in series with the writing coil and connected in such a way that, in the magnetoresistant element, the magnetic field resulting from the passage of the current in the conductor element opposes the writing leakage field.