Patent application number | Description | Published |
20090021860 | Production method for magnetic recording medium - A production method for a magnetic recording medium including forming thin films on a substrate using a sputtering method with a target, wherein the target on which an annular-shaped erosion area is formed during sputtering and a substrate holder on which a plurality of substrates are mounted are installed, opposed in parallel, in a manner such that center axes of the target and the substrate holder align with each other, and the substrates are mounted on the substrate holder in positions such that R | 01-22-2009 |
20090142625 | MAGNETIC RECORDING MEDIUM, PRODUCTION PROCESS THEREOF, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The present invention provides a magnetic recording medium which enables improvement of the layer quality of magnetic layer grown on the surface of a soft magnetic underlayer by conducting excellent control of crystal orientation by imparting an optimal half-width of the Rocking curve (Δθ50), as well as obtainment of SNR that suppresses generation of TA and enables realization of high-density recording. The magnetic recording medium includes a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic recording layer, and a protective layer, which are disposed on top of a non-magnetic substrate; wherein the magnetic anisotropy ratio (Hmr/Hmc) of the soft magnetic underlayer is 1 or less, and Δθ50 is 1 to 6 degrees. The soft magnetic underlayer is formed on the primary surface of the non-magnetic substrate where the primary surface has been polished one substrate at a time by a sheet-type texture processing device using polishing tape and a slurry containing colloidal silica abrasive grain. | 06-04-2009 |
20100007985 | METHOD FOR PRODUCING MAGNETIC MEDIUM, MAGNETIC RECORD REPRODUCTION DEVICE, AND MAGNETIC RECORDING MEDIUM - One object of the present invention is to provide a method for producing a magnetic recording medium which has excellent magnetic separation properties of the magnetic recording pattern, the present invention providing a method for producing a magnetic recording medium having a magnetic recording pattern which is magnetically separated, comprising the steps of: after laminating at least a magnetic layer and a carbon protective layer on a non-magnetic substrate in this order, partially irradiating with a reactive plasma containing carbon and a halogen or reactive ions which are generated in the reactive plasma on a surface of the carbon protective layer, and thereby forming a halogenated carbon protective layer, which is obtained by partially halogenating the carbon protective layer, and the magnetic recording pattern separated magnetically which is obtained by partially improving the magnetic layer. | 01-14-2010 |
20100015356 | IN-LINE FILM FORMING APPARATUS AND MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM - An in-line film forming apparatus is provided which prevents uneven processing from occurring when reactive plasma treatment or ion irradiation treatment is performed on a substrate held by a carrier. A carrier ( | 01-21-2010 |
20100079901 | PRODUCTION METHOD FOR MAGNETIC RECORDING MEDIA AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A production method for a magnetic recording medium on which a stable lubricant layer can be formed even if unevenness remains on the surface, and the thickness of the lubricant layer is not reduced over time is provided. The method includes forming a lubricant layer ( | 04-01-2010 |
20100118441 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - There is provided a method for manufacturing a magnetic recording medium which can easily produce a magnetic recording medium, the magnetic recording medium having a plurality of magnetically separated recording layers suitable as the recording layers in a discrete track medium or patterned medium, and also having excellent surface flatness, in which spaces between the adjacent recording layers are filled in with a non-magnetic material. | 05-13-2010 |
20100128378 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING-REPRODUCING APPARATUS - A magnetic recording medium which does not easily cause a material containing Fe or Co to corrode is disclosed. The method for manufacturing a magnetic recording medium | 05-27-2010 |
20100165504 | METHOD OF PRODUCING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND READING DEVICE - The present invention aims to provide a method of producing a magnetic recording medium which is a method of producing a magnetic recording medium having a magnetically-separated magnetic recording pattern, the method including: forming a magnetic layer on a non-magnetic substrate; then exposing a surface of the magnetic layer partially to reactive plasma, or a reactive ion generated in the plasma to amorphize the portion of the magnetic layer. | 07-01-2010 |
20100182717 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING-REPRODUCING APPARATUS - Provided is a method for manufacturing, in a simple process, a magnetic recording medium having a distinct magnetic recording pattern formed thereon. A method for manufacturing a magnetic recording medium having a magnetically-separated magnetic recording pattern MP, the method at least including; a first step of forming a first magnetic layer | 07-22-2010 |
20100196596 | DOUBLE-SIDED COATING APPARATUS AND METHOD FOR DOUBLE-SIDED COATING WITH COATING SOLUTION - Provided are a double-sided coating apparatus and a method for double-sided coating with a coating solution configured to uniformly apply a coating solution to both surfaces of a substrate having a central opening in a simple process while preventing ingress of the coating solution to the central opening. A coating apparatus | 08-05-2010 |
20100239889 | METHOD AND APPARATUS FOR MANUFACTURING RESIN STAMPER, IMPRINT METHOD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - The present invention provides a technique capable of manufacturing a resin stamper at a low cost. A method of manufacturing a plate-shaped resin stamper includes: pressing a resin composite base material against a mother stamper having a pattern formed on the surface thereof by compression molding to transfer the pattern of the mother stamper to the composite base material; and punching the composite base material. In the manufacturing method, the resin composite base material includes at least one curing resin. In addition, during the compression molding, a portion of the composite base material is cured by active energy beams or heat, the pattern is transferred to the composite base material, and the composite base material is punched, thereby manufacturing the resin stamper. | 09-23-2010 |
20100290152 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - There is provided a method of manufacturing a magnetic recording medium where a magnetic layer is formed on a substrate, followed by formation of a magnetic pattern, which is a method producing few defective products with low production cost, the method of manufacturing a magnetic recording medium having magnetic recording patterns which are magnetically separated, including, in the following order: a step of forming a magnetic layer on a substrate which has an opening in the centre; a step of applying a resin film to the magnetic layer; a step of pressing against the substrate a film-type mold on which an uneven pattern has been formed; a step of transferring the uneven pattern of the mold onto the resin film; a step of separating the mold from the substrate; and a step of forming magnetic recording patterns on the magnetic layer using the uneven pattern which has been transferred. | 11-18-2010 |
20110007414 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - Disclosed is a method of manufacturing a magnetic recording medium capable of effectively and reliably removing foreign materials on the surface of a magnetic recording medium, preventing a mask layer from remaining on the surface of the magnetic recording medium, and forming the pattern of a magnetic layer with high productivity. The method of manufacturing a magnetic recording medium includes: a step of forming a magnetic layer on a non-magnetic substrate; a step of forming a mask layer on the magnetic layer; a step of patterning the mask layer to form a mask pattern; a step of forming a magnetic recording pattern on the magnetic layer using the mask pattern; a step of burnishing the surface of the mask pattern with an abrasive; and a step of removing the mask pattern. | 01-13-2011 |
20110014499 | UV NANOIMPRINT METHOD, RESIN REPLICA MOLD AND METHOD FOR PRODUCING THE SAME, MAGNETIC RECORDING MEDIUM AND METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A UV nanoimprint method comprising performing compression molding by pressing a mold having a pattern formed on the surface thereof against a work prepared by forming a thin film composed of an ultraviolet-curable resin on a substrate, and irradiating with ultraviolet light, either concurrently with the compression molding or after the compression molding, thereby transferring the pattern to the thin film, wherein the ultraviolet light is irradiated using an ultraviolet light irradiation apparatus equipped with temperature rise suppression means, and a light source that does not continuously emit heat rays together with ultraviolet light is used as a light source of the ultraviolet light irradiation apparatus. | 01-20-2011 |
20110019307 | METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A method for producing a magnetic recording medium comprising at least a recording layer and a protective film provided on top of a non-magnetic substrate, the method comprising, in the following order, forming a continuous recording layer on the substrate, forming a patterned resist layer, partially removing the recording layer based on a resist pattern, applying an organosilicon compound having an active energy beam-curable functional group onto the recording layer and regions from which the recording layer has been removed, curing the organosilicon compound with an active energy beam, etching the organosilicon compound to expose a magnetic layer, and forming a protective film. | 01-27-2011 |
20110019308 | PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING PERPENDICULAR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - Disclosed is a perpendicular magnetic recording medium including: a nonmagnetic substrate; and a recording layer formed on the nonmagnetic substrate, the recording layer having magnetic anisotropy in a direction perpendicular to a surface of the nonmagnetic substrate and including a plurality of recording portions and a plurality of separation regions for isolating the neighboring recording portions, wherein the separation regions are formed of a material having a granular structure. | 01-27-2011 |
20110027478 | DOUBLE-SIDE COATING APPARATUS, METHOD FOR COATING DOUBLE SIDES WITH COATING SOLUTION, EDGE RINSING APPARATUS, AND EDGE RINSING METHOD - Provided is a double-side coating apparatus which can uniformly coat both surfaces of a substrate to be processed with a coating solution and form uniform coating films on both the surfaces of the substrate to be processed. A double-side coating apparatus ( | 02-03-2011 |
20110032635 | MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME, AND MAGNETIC RECORDING REPRODUCING APPARATUS - A magnetic recording medium of the present invention includes, on a substrate ( | 02-10-2011 |
20110051282 | MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - There is provided a magnetic recording medium which can be manufactured at a high production efficiency, and in which a protruding section constituted of a magnetic layer can be separated by a recessed separating region, and stability for the floating properties of the magnetic head is excellent, | 03-03-2011 |
20110056908 | METHOD AND APPARATUS FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - There is provided a method for manufacturing a magnetic recording medium which manufactures media by employing the same in-line apparatus and which is capable of reducing the contamination due to the handling and of enhancing the productivity,
| 03-10-2011 |
20110058461 | METHOD OF EVALUATING MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - Disclosed is a magnetic recording medium evaluating method capable of providing a discrete-type or bit-pattern-type magnetic recording medium that has stable head floating characteristics even when concave and convex portions remain on the surface and can respond to high recording density with high productivity. A method of evaluating a magnetic recording medium having a magnetic recording pattern on at least one surface of a disk-shaped substrate and includes concave and convex portions corresponding to the magnetic recording pattern on the surface includes: floating and moving a head slider having a sensor attached thereto above the surface of the magnetic recording medium that is rotated; detecting a signal output from the sensor in a non-contact state between the head slider and the magnetic recording medium; and determining whether the magnetic recording medium is defective on the basis of the signal. | 03-10-2011 |
20110059235 | METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM AND PRODUCING APPARATUS THEREOF - Provided are a method of producing a magnetic recording medium with improved environmental resistance, especially, corrosion resistance and an apparatus used therefor. In producing a magnetic recording medium having a magnetic recording pattern on a magnetic recording layer formed on at least a surface of a nonmagnetic substrate using an in-line film formation apparatus, the method comprising: mounting a nonmagnetic substrate on the carrier, the nonmagnetic substrate having at least the magnetic recording layer and a mask layer corresponding to the magnetic recording pattern laminated thereon in this order; forming the magnetic recording pattern by having areas of the magnetic recording layer that are not covered with the mask layer subjected to a reactive plasma treatment or an ion irradiation treatment; removing the mask layer from the magnetic recording layer; and removing the nonmagnetic substrate from the carrier, wherein each of the chambers has a decompressed atmosphere inside while the carrier passes through each of the chambers and each of the processes are conducted continuously while being blocked from the ambient air. | 03-10-2011 |
20110064871 | LAMINATED BODY FOR MANUFACTURING RESIN MOLD, LAMINATED BODY, RESIN MOLD AND METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - A laminated body which forms a resin mold by compression molding using a master mold, the laminated body having: a pair of mutually facing base materials, a layer of a liquid or gel-like curable resin material sandwiched between the pair of base materials, and one or more flow suppression bodies, which are composed of a cured product of the curable resin material and are sandwiched between the pair of base materials, wherein the layer of the curable resin material is sealed by the pair of base materials and the flow suppression bodies. Also, a method for manufacturing a resin mold using the laminated body. | 03-17-2011 |
20110070462 | PATTERN FORMING METHOD - Disclosed is a pattern forming method having a first step of forming a first ultraviolet curable resin layer on a substrate, a second step of leading a pattern-formed surface of a first mold wherein a predetermined pattern is formed to oppose the first ultraviolet curable resin layer, and attaching the substrate to the first mold by applying pressure, and a third step of irradiating diffused ultraviolet rays on the first ultraviolet curable resin layer, to which the pattern of the first mold is transferred by the pressure-attaching, the irradiated ultraviolet rays being diffused by disposing an ultraviolet light diffusion member between the ultraviolet curable resin layer and an ultraviolet light source. | 03-24-2011 |
20120044596 | METHOD OF PRODUCING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - There is provided a method of producing a magnetic recording medium having a magnetically separated magnetic recording pattern formed therein, without oxidizing or halogenating a surface of a magnetic layer, and also without contaminating the surface with dust and without complicating a production process, | 02-23-2012 |
20120099222 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern is provided, in which the surface of a magnetic layer is not oxidized or halogenated, the surface is not contaminated with dust, and the manufacturing process is not complex. The method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern includes forming a magnetic layer on a nonmagnetic substrate, forming a mask layer made of carbon to form the magnetic recording pattern on the magnetic layer, forming cobalt carbide as a nonmagnetic material in the magnetic layer by irradiating a region of the magnetic layer not covered by the mask layer with ion beams including carbon hydride ions, and removing the mask layer in this order. | 04-26-2012 |
20120257300 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING DEVICE - Provided is a method of manufacturing a magnetic recording medium capable of manufacturing at a high productivity a useful magnetic recording medium having high surface smoothness and excellent head floating characteristics. Such a method of manufacturing a magnetic recording medium includes: forming a magnetic layer on a nonmagnetic substrate; and partially injecting ions into the magnetic layer to modify magnetic characteristics at a location of the magnetic layer where the ions are injected and to form magnetically separated magnetic recording patterns, in which, when partially injecting ions into the magnetic layer, a carbon film is formed on the surface of the magnetic layer, the carbon film is partially thinned by patterning, and ions are partially injected into the magnetic layer through locations where the carbon film is thinned. | 10-11-2012 |
20120300339 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORD/REPRODUCTION APPARATUS - According to the present invention, a magnetic recording medium is provided including a disk-shaped non-magnetic substrate and at least a perpendicular magnetic layer formed on the disk-shaped non-magnetic substrate, wherein the perpendicular magnetic layer has a structure in which an FePt or CoPt nanoparticle array is formed on a formation surface, on which a plurality of striations each having a circumferential directional component are formed, by a texturing treatment; a manufacturing method thereof; and a magnetic record/reproduction apparatus including the magnetic recording medium or a magnetic recording medium manufactured according to the manufacturing method. | 11-29-2012 |