74results about "Thick magnetic films" patented technology

A magnetic composition comprised of cobalt ferrite nanoparticles dispersed in an ionic exchange resin.

This invention describes materials system and processing conditions for manufacturing magnetic circuit components such as induction coils and transformers that are non wire-wound, miniature in size and, have a low manufacturing cost. The materials system of this invention is comprised of: (1) Low Temperature Cofire Ceramic (LTCC) tapes or thick film pastes of ferromagnetic ceramics with a 20 to 750 range of magnetic permeability to form the magnetic core of the components, (2) Thick film buried silver conductor paste to form the planar induction coils on individual magnetic layers, (3) Thick film via-fill silver conductor paste to interconnect two or more of the planar induction coils through the thickness of the magnetic layers, (4) Thick film silver solderable top layer conductor paste compatible with the ferrite and, (5) Thick film dielectric paste with low magnetic permeability to redirect the magnetic flux for enhancing the magnetic coupling coefficient and to insulate the silver conductors for enhancing the dielectric breakdown voltage. The key characteristics of the materials system of this invention that facilitate manufacture of low cost non wire-wound, miniature magnetic circuit components are: (1) Mutual compatibility essential for either of the techniques, the cofire technique or the sequential technique, used for manufacturing multilayer hybrid microelectronic components, (2) Complementary thermo-physical properties such as shrinkage and thermal expansion coefficient essential for manufacturing flat multilayer magnetic components, (3) Magnetic components with magnetic coupling coefficients greater than 0.95 under optimal processing conditions and, (4) Magnetic components with dielectric breakdown voltage greater than 500V/mil under optimal processing conditions.

The present invention comprises a radiation curable composition for in-line printing containing magnetic pigments capable of being magnetized to possess permanent magnetic properties after the composition is cured. The composition is cured by an ionizing radiation source, preferably by UV light or electron beam radiation (UV/EB). The present invention is also directed to an in-line process for printing magnetic images on non-magnetic substrate, comprising: pattern applying the above mentioned radiation curable composition on the substrate opposite to a print side, pre-aligning the magnetic pigment particles (if necessary) of the applied composition, curing the composition by ionizing radiation source (UV/EB), magnetizing the cured composition, then finishing the final piece. The finishing step could involve delivering the final piece in a simple sheet with die cut magnets or creating an "integrated magnet" format involving plow folding over the magnet panel, pattern coating or flood coating an adhesive that will only adhere the non-magnet matrix areas between die cut magnets, thus, allowing for the individual magnets to be "popped" out of the carrier by the final end user. The resulting magnetized pieces will possess holding power like magnets (refrigerator and office magnets) and are capable of carrying personalized, Scitex imaged and direct marketing information (including redemption value for coupons, local public service access numbers, etc.)

Magnetic receptive Paints and coatings have been developed to allow one to paint a wall with this coating and apply magnets to this surface. The further development of magnetic receptive coatings incorporates the use of multiple size particles giving the finished surface a smoother appearance and increasing the particle load in the dry mill surface. This is useful in the coating of substrates where the need to coat the thinnest possible coating on the surface of a substrate such as papers and films as well as painting on walls, gives you the highest magnetic receptive surface possible at the thinnest mill thickness of applied coating.

A magnetic core includes a tape comprising a magnetic film disposed on a substrate. The tape is arranged in a winding having a number of turns to form the magnetic core. The magnetic film comprises a magnetic material characterized by a coercivity of less than about ten Oersteds (10 Oe). A transformer includes the magnetic core, and a number of electrically conductive windings, where each of the windings extends around the magnetic core in at least one turn. An inductor includes the magnetic core, and an electrically conductive winding extending around the magnetic core in a number of turns.

A method of room temperature synthesis of magnetic metal oxide nanoclusters within a diblock copolymer matrix includes the step of synthesizing, by ring opening metathesis polymerization technique, a diblock copolymer having a repeat unit ratio m/n, introducing, at room temperature, one or several metal containing precursors into the one block of the diblock copolymer, and processing the metal containing diblock copolymer by wet chemical technique to form nanoclusters of the metal(s) oxide within the diblock copolymer matrix. Specific reaction for synthesis of CoFe₃O₄ and Co₃O₄ nanoclusters within diblock copolymers, such as [NOR]_m/[NORCOOH]_n and [NOR]_m/[CO(bTAN)]_n, respectively is used in the method of the present invention.

In a method of producing a composite magnetic body, flat soft magnetic powder subjected to annealing to be free from stress strain is prepared and mixed with a binder and a solvent for dissolving the binder to form a slurry-like mixture. The mixture is formed into a film. Then, the solvent is removed. Thus, a sheet of the composite magnetic body is produced.

Disclosed is a recording paper containing pulp fibers and magnetic fibers, in which the fiber orientation ratio is within a range selected from the range from 1.8 to 3.0 and the range from 1.0 to 1.3 as measured by an ultrasonic wave velocity method.

Disclosed is a magnetic body composition, including a resin and a magnetic nanoparticle, the magnetic nanoparticle including an oxide of at least one kind of metal selected from the group composed of Ga, Zn, and Sn and an FeCo oxide.

A soft magnetic resin composition contains flat soft magnetic particles, and a resin component containing an epoxy resin, a phenol resin, and an acrylic resin. The epoxy resin consists of only an epoxy resin having three or more functional groups, the phenol resin consists of only a phenol resin having three or more functional groups, and the content ratio of the acrylic resin in the resin component is 25 mass % or more.

The current invention relates to a method for the production of a magnetic layer on a substrate, comprising the production of a printable varnish, containing 60 weight-% of neodym iron boron powder, 10 weight-% of ferrite powder, preferably strontium hexaferrite powder, 1.4 weight-% of a catalyst, 1.1 weight-% of a dispersing additive, and as the remainder a matrix, preferably an epoxy polyol matrix. These agents are mixed by means of stirring or kneading, and rolled in a three-roll mill. Preferably, they are applied to a substrate by screen printing, and subsequently pre-cured at 80 to 120° C. for six to twelve hours, and then cured at 200° C. to 220° C. for three hours.

Various electric wave absorbers for the GHz band have been developed. However, parameters for obtaining the optimal electric wave absorption characteristic are only the shape and the content of a dielectric material or a conductive material, and the degree of freedom of the parameters is small. Furthermore, in a recent wireless LAN, electric wave absorbers that can be used for absorbing potentially electric waves in a plurality of bands, for example, in two frequency bands of 2.45 GHz band and 5.2 GHz band, have also been desired. A woody electric wave absorber is also disclosed, characterized in that it is a laminate type magnetic wood prepared by pressure-pasting an opposed plate material pair comprising natural wood or a processed woody material via a magnetic layer containing a ferrite powder, it contains a non-magnetic stainless steel powder in an amount of 20 to 80 vol % relative to the ferrite powder, and the magnetic layer has a total volume content for the ferrite powder and the non-magnetic stainless steel powder of 10 to 40 % and has a thickness of 0.5 to 5.0 mm, it has a central frequency within 1 to 8 GHz, and has an electric wave absorption characteristic of 10 dB or more in a 2.45 GHz band or a 5.2 GHz band of frequency.

In a process for producing a printed design creating 3D visual effect, a compound consisting of a printing ink blended with magnetic particles is used. The printing ink containing the magnetic particles is applied onto a printing plate on a printing apparatus, and a tool capable of producing a required magnetic force is positioned at a predetermined area of the applied printing ink, so that the magnetic particles in the printing ink are attracted and gathered to form ups and downs in the area and create a 3D visual effect.

A multilayer inductor component has a multilayer part having a plurality of magnetic layers laminated therein and a conductor part arranged within the multilayer part. The magnetic layers are formed from a ferrite material and an additive. The ferrite material contains Fe₂O₃, NiO, CuO, and ZnO. Fe₂O₃ is 30 to 45 mol %. NiO is 45 to 58 mol %. CuO is 6 to 10 mol %. ZnO is 0 to 3 mol %. The additive contains CoO. The content of CoO is 0.1 to 2.5 mass % with respect to the ferrite material as a whole. The multilayer inductor component has an impedance peak of 500Ω or greater at an operating frequency of 1 GHz or higher.