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| Number | Title | Issue Date |
| 7365101 | Dispersion of pyrogenically produced cerium oxide A dispersion of pyrogenically produced cerium oxide, which does not contain any particles larger than 1 μm, is produced by dispersing a pyrogenically produced cerium oxide in water by means of a dissolver, centrifuging it, separating the supernatant from the bottom... | 04/29/2008 |
| 7324305 | Magnetic recording medium including a magnetic layer with first magnetic particles and a protective layer with second magnetic particles The present invention enables a substantial decrease of the magnetic spacing while maintaining the flying height of the transducer and the structure of the protective layers for a magnetic recording device. A magnetic layer containing first magnetic particles is for... | 01/29/2008 |
| 7300695 | Alignable diffractive pigment flakes Diffractive pigment flakes are selectively aligned to form an image. In one embodiment, flakes having a magnetic layer are shaped to facilitate alignment in a magnetic field. In another embodiment, the flakes include a magnetically discontinuous layer. In a particul... | 11/27/2007 |
| 7288210 | Method for manufacturing magnetic paint, method for manufacturing non-magnetic paint and magnetic recording medium A method for manufacturing magnetic paint or non-magnetic paint, which can produce a magnetic recording medium having excellent surface smoothness by appropriately setting the condition of a dispersion process for improving the dispersibility of the paint, and a mag... | 10/30/2007 |
| 7289408 | Method and apparatus for reproducing recording mark below diffraction limit of light from optical recording medium The object of the present invention is to realize reduction of the level jitter generated from a noise component at a signal saturation level or a waveform distortion in a portion except for signal polarity portions (rising edge and falling edge), and good error cha... | 10/30/2007 |
| 7258900 | Magnetic planarization of pigment flakes A magnetic field is applied to planarize magnetic pigment flakes relative to a surface. Pigment flakes, such as optically variable pigment flakes, are used in a variety of paints, inks, extrusions, powder coatings, and other forms for decorative and security applica... | 08/21/2007 |
| 7258915 | Flake for covert security applications Covert flakes having one or more symbols and/or a selected shape are used in a composition, such as ink or paint, to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the covert flakes are covert pigment f... | 08/21/2007 |
| 7248045 | Magnetic sensing device, method of forming the same, magnetic sensor, and ammeter The present invention provides a magnetic sensing device capable of stably sensing a signal magnetic field with high sensitivity by suppressing occurrence of a hysteresis to reduce 1/f noise. A magnetic sensing device has a stacked body including a pinned layer havi... | 07/24/2007 |
| 7242553 | Substrate for magnetic recording medium When a soft magnetic layer for a double layer type perpendicular magnetic recording medium is formed by a plating method, there is the problem of the occurrence of an isolated pulse noise called spike noise so that signal reproduction characteristics are lost. In or... | 07/10/2007 |
| 7241489 | Opaque flake for covert security applications Opaque flakes, such as pigment or bright flake used in paints and inks, have a selected shape and/or other indicia to provide a covert security feature to an object. In some embodiments the composition includes base pigment, and the opaque covert flakes match the vi... | 07/10/2007 |
| 7203607 | System and method for determining intergranular exchange in perpendicular recording media A method for estimating the average intergranular exchange field using measurements of major and minor hysteresis loops. The method also facilitates deshearing hysteresis loops for analysis purposes in perpendicular media. This estimation technique is especially imp... | 04/10/2007 |
| 7193284 | Magnetoresistance effect element, method of manufacture thereof, magnetic storage and method of manufacture thereof The present invention is aimed at enabling a spin-transfer magnetization switching in the random access magnetic memory by reducing a switching current density in the spin-transfer magnetization switching to an order smaller than 10 MA/cm2 and without cau... | 03/20/2007 |
| 7175927 | Magnetic recording medium utilizing specified non-magnetic particles in the magnetic layer A magnetic recording medium having a non-magnetic support and a magnetic layer formed thereon, wherein the magnetic layer comprises a ferromagnetic powder, a binder and a non-magnetic inorganic powder, and wherein at least 95% of the non-magnetic powder particles co... | 02/13/2007 |
| 7170725 | Magnetic sensor having an aluminum-nitride seed layer for an anti-ferromagnetic layer A magnetic sensor is disclosed that is disposed between top and bottom magnetic shield layers, the sensor comprising: a nonferromagnetic layer disposed beneath the top shield layer; a magnetically soft layer disposed beneath the nonferromagnetic layer, the magnetica... | 01/30/2007 |
| 7166173 | Method of simultaneously initializing two antiferromagnetic layers in a magnetic sensor Magnetic tunnel junction (MTJ) and charge perpendicular-to-plane (CPP) magnetic sensors are disclosed which have a first antiferromagnetic layer for pinning the magnetization direction in a pinned layer and a second antiferromagnetic layer for providing bias stabili... | 01/23/2007 |
| 7160481 | Method for manufacturing magnetic paint, and magnetic recording medium A method for manufacturing magnetic paint is provided, wherein a dispersion condition is appropriately controlled to excellently disperse a magnetic powder composed of fine particles adaptable for a higher recording density, so that magnetic paint having excellent d... | 01/09/2007 |
| 7112354 | Electron spin mechanisms for inducing magnetic-polarization reversal An apparatus includes a low magnetic-coercivity layer of material (LMC layer) having a majority electron-spin-polarization (M-ESP), an energy-gap coupled with the LMC layer, wherein a flow of spin-polarized electrons having an electron-spin-polarization anti-paralle... | 09/26/2006 |
| 7072209 | Magnetic memory having synthetic antiferromagnetic pinned layer A magnetic memory element includes a sense structure, a tunnel barrier adjacent the sense structure, and a synthetic antiferromagnet (SAF) adjacent the tunnel barrier on a side opposite the sense structure. The SAF includes an antiferromagnetic structure adjacent a ... | 07/04/2006 |
| 7047883 | Method and apparatus for orienting magnetic flakes Apparatus and related methods align magnetic flakes in a carrier, such as an ink vehicle or a paint vehicle to create optically variable images in a high-speed, linear printing operation. Images can provide security features on high-value documents, such as bank not... | 05/23/2006 |
| 7022383 | Exchange bias structure for abutted junction GMR sensor Although it is known that exchange bias can be utilized in abutted junctions for longitudinal stabilization, a relatively large moment is needed to pin down the sensor edges effectively. Due to the inverse dependence of the exchange bias on the magnetic layer thickn... | 04/04/2006 |
| 7001645 | Magnetic coating, coating method with same and coating apparatus therefor The invention seeks to provide a magnetized coating suitable for exerting durable magnetic forces. To do this, the method of the invention consists in spreading conductive particles (13) on a medium (11), the particles being directed by prior magnetiza... | 02/21/2006 |
| 6994895 | Magnetic recording medium including an annealed alloy particle layer and method of producing the same A method of producing a magnetic recording medium including the steps of preparing alloy particles capable of forming a CuAu type or Cu3Au type ferromagnetic order alloy phase, forming an alloy particle layer on a support using the alloy particles, oxidiz... | 02/07/2006 |
| 6904669 | Magnetic sensor and method of producing the same On a single chip are formed a plurality of magnetoresistance effect elements provided with pinned layers having fixed magnetization axes in the directions that cross each other. On a substrate 10 are formed magnetic layers that will become two magnetic tunnel... | 06/14/2005 |
| 6858328 | Master information support A master information carrier with excellent durability is provided, for the use of static and a real lump-sum recording of digital information signals on magnetic recording medium. The master information carrier comprises a non-magnetic substrate on which a ferromag... | 02/22/2005 |
| 6835450 | Magnetic recording medium Multilayer magnetic recording medium is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties in the entire recording wavelength range and good mechanical properties and possesses a flat frequency... | 12/28/2004 |
| 6831802 | Methods and apparatus for thermally bonding lubricant to a disk surface by the repetitive writing of data A method of thermally bonding lubricant over a surface of a magnetic disk in a disk drive involves providing a heat source at an air bearing surface (ABS) of a magnetic head; causing the heat source to be energized to produce heat; and causing the magnetic head to b... | 12/14/2004 |
| 6821574 | Method of manufacturing a magnetic recording medium A multiple layer magnetic recording medium exhibiting a marked increase in skirt signal-to-noise ratios, and a method of manufacturing such magnetic recording medium including the steps of forming a lower support layer and a magnetic layer on the substrate; transpor... | 11/23/2004 |
| 6773765 | Thermally sprayed, flexible magnet with an induced anisotropy Disclosed is a process for making a flexible magnet with an induced anisotropy, and in particular to a process for making a flexible anisotropic magnet by thermal spraying in the presence of an applied magnetic field. The method may be used to fabricate a substrate ... | 08/10/2004 |
| 6764721 | Manufacturing method for a perpendicular magnetic recording medium A perpendicular magnetic recording medium is formed of a soft magnetic layer, an anti-ferromagnetic layer, a magnetic recording layer, a protective layer, and a liquid lubricant layer deposited in that order on a non-magnetic substrate. The anti-ferromagnetic layer ... | 07/20/2004 |
| 6753043 | Patterning of high coercivity magnetic media by ion implantation A servo-patterned magnetic recording medium, comprising: a magnetic layer having a surface with substantially uniform topography, the magnetic layer including a data zone and a servo pattern, the servo pattern comprising: (a) a first patterned pluralit... | 06/22/2004 |
| 6716489 | Method for annealing domain wall displacement type magneto-optical recording medium A manufacturing method of a domain wall displacement type magneto-optical recording medium comprises the steps of depositing a magnetic layer on a substrate to prepare a disc, and irradiating the magnetic layer with a converged light beam while applying a magnetic f... | 04/06/2004 |
| 6716488 | Ferrite film formation method A ferrite layer formation process that may be performed at a lower temperature than conventional ferrite formation processes. The formation process may produce highly anisotropic structures. A ferrite layer is deposited on a substrate while the substrate is exposed ... | 04/06/2004 |
| 6579635 | Smoothing and stabilization of domain walls in perpendicularly polarized magnetic films A ferromagnetic film suitable for ultra-high density perpendicular recording, and a process for producing the film. The process generally entails forming a film of ferromagnetic material on a surface of a substrate, such that the film is characterized by ... | 06/17/2003 |
| 6495275 | Multi-layered thin-film functional device and magnetoresistance effect element A magnetoresistance effect element includes a free layer, a pinned layer and a non-magnetic intermediate layer interposed between the free layer and the pinned layer. Additionally, a metal barrier layer is provided adjacent to the first magnetic layer. An... | 12/17/2002 |
| 6465053 | Method for manufacturing a magnetic device Magnetic field sensors and magnetic memories have at least two magnetoresistive bridge elements (A,B,C,D), wherein each magnetoresistive element comprises a free (F) and a pinned (P) ferromagnetic layer. The magnetization directions of pinned ferromagneti... | 10/15/2002 |
| 6403169 | Method of producing a security document One aspect of the present invention provides a method of producing a security document, including the steps of: (a) forming a sheet-like substrate of plastics material having first and second opposing surfaces, (b) coating a first layer of polymer material con... | 06/11/2002 |
| 6391393 | Method for making field-structured memory materials A method of forming a dual-level memory material using field structured materials. The field structured materials are formed from a dispersion of ferromagnetic particles in a polymerizable liquid medium, such as a urethane acrylate-based photopolymer, whi... | 05/21/2002 |
| 6372302 | Process for producing a magnetic recording medium The present invention provides a magnetic recording medium having a thinned magnetic layer, excellent electromagnetic conversion characteristics and an excellent durability, and a process for producing the same. A magnetic recording medium comprising a lo... | 04/16/2002 |
| 6319544 | Manufacturing method of magnetoresistive effect sensor and manufacturing method of magnetic head with the sensor A method of manufacturing a MR sensor having at least an anti-ferromagnetic layer and a ferromagnetic layer, and to a method for manufacturing a magnetic head with the MR sensor. The sensor utilizes bias magnetic field provided by exchange coupling betwee... | 11/20/2001 |
| 6235368 | Magnetic recording medium having a high recording density and its production A magnetic recording medium which consists of at least two layers cast one on top of the other is described, the lower layer containing acicular magnetic pigments having a field strength of 5-40 kA/m and a magnetization of 20-70 nTm3 /g and the... | 05/22/2001 |
