| Patent application number | Description | Published |
|---|
| 20080213420 | Stamper and method of manufacturing the same - A stamper includes a stamper body including a nickel having a patterned surface by artificial drawing method, and a surface layer of a nickel-vanadium alloy having a vanadium content of less than 3 atomic percent formed on the patterned surface. | 09-04-2008 |
| 20080241595 | Magnetic recording medium - A magnetic recording medium includes a soft magnetic underlayer formed on a substrate, magnetic patterns made of a ferromagnetic material and provided separately on the soft magnetic underlayer, and a nonmagnetic layer including two sublayers or more of a same material and formed on the soft magnetic underlayer between the magnetic patterns. | 10-02-2008 |
| 20080285174 | Magnetic recording medium and magnetic storage device - A magnetic recording medium includes: a substrate; a recording layer that is formed on the substrate to have a grooved pattern; and a protection layer formed on the recording layer to fill in the grooved pattern, wherein the recording layer is defined to have a servo portion that retains servo data and a recording track portion that retains recording data, and wherein a first film thickness of the protection layer at the servo portion is larger than a second film thickness of the protection layer at the recording track portion by a thickness that is in a range from 1 nm to 10 nm. | 11-20-2008 |
| 20090059397 | Lens barrel and imaging apparatus - A lens barrel that configures an imaging apparatus by being detachably attached to an imaging apparatus main body includes a lens barrel in which an imaging lens is formed and a connecting section to the imaging apparatus main body is formed on one end side in an optical axis direction of the imaging lens and a grip section provided on a side surface of the lens barrel and gripped by a camera operator during imaging. The grip section projects from the side surface of the lens barrel further to a side surface of the apparatus main body than an end face on the connecting section side. | 03-05-2009 |
| 20090078673 | Method of forming a pattern - A pattern forming method is provided, which includes forming, above a substrate, a layer of a diblock copolymer composition containing at least PS and PEO, subjecting the layer to phase separation to obtain a phase-separated layer, thereby forming an easy-to-etch region constituted by PS and having a cylindrical or lamellar configuration extending in a first direction, forming an imprinting resist layer on the phase-separated layer, subjecting the imprinting resist layer to imprinting to form, on the imprinting resist layer, an uneven pattern consisting of projections and recesses extending in a second direction intersecting with the first direction, selectively removing, from the imprinting resist layer, the recesses, thereby leaving only the projections and, at the same time, selectively removing the PS from the phase-separated layer to obtain an etching resistive pattern containing PEO, and etching the substrate using, as a mask, not only the projections but also the etching resistive pattern. | 03-26-2009 |
| 20090081482 | Magnetic recording medium and method of manufacturing the same - A magnetic recording medium a magnetic recording medium includes a soft magnetic layer formed on a substrate, magnetic patterns made of a protruded ferromagnetic layer separated from each other on the soft magnetic layer, and a nonmagnetic layer formed between the magnetic patterns, a nitrogen concentration therein being higher on a surface side than on a substrate side. | 03-26-2009 |
| 20090091122 | PERSONAL INFORMATION PROTECTING SHEET, METHOD OF MANUFACTURING THE SAME, AND ENVELOPE WITH PERSONAL INFORMATION PROTECTING SHEET - The present invention provides a personal information protecting sheet in which personal information can be easily made illegible. The personal information protecting sheet includes a base material, a release layer formed on at least a part of the surface of the base material, and an image-receiving layer formed on the release layer. When a force having a directional component that is larger than a predetermined value and parallel to the surface of the base material is applied to the surface, a portion of the image-receiving layer to which the force is applied is peeled from the release layer. | 04-09-2009 |
| 20090135519 | Magnetic recording medium, method and apparatus for manufacturing magnetic recording apparatus - A magnetic recording medium includes a disk substrate, and recording cells arrayed on the disk substrate in a track direction, the recording cells includes a ferromagnetic pattern and a magnetic pattern formed on one of two sidewalls of the ferromagnetic pattern in the track direction and having a lower crystalline magnetic anisotropy constant Ku than that of the ferromagnetic pattern. | 05-28-2009 |
| 20090142620 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A magnetic recording medium is obtained by easily patterning a magnetic recording layer without deteriorating its electromagnetic conversion characteristics, by forming a silicon-based protective film between the magnetic recording layer and a photoresist, and performing dry etching and oxygen plasma processing. | 06-04-2009 |
| 20090161257 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording medium includes protruded magnetic patterns formed on a substrate, and a non-magnetic material filled in recesses between the magnetic patterns and made of a multi-element amorphous alloy containing Ni or Cu, and two or more metals selected from the group consisting of Ta, Nb, Ti, Zr, Hf, Cr, Mo and Ag. | 06-25-2009 |
| 20090162704 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming protruded magnetic patterns on a substrate, depositing a nonmagnetic material in recesses between the magnetic patterns and on the magnetic patterns, and etching back the nonmagnetic material using an oxygen-containing etching gas while reforming a surface of the nonmagnetic material. | 06-25-2009 |
| 20090166323 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes depositing a magnetic recording layer and a sacrifice layer on a substrate, patterning the sacrifice layer and magnetic recording layer to form protruded magnetic patterns and sacrifice patterns, depositing a nonmagnetic material in recesses between the magnetic patterns and sacrifice patterns and on the sacrifice patterns, and etching back the nonmagnetic material. | 07-02-2009 |
| 20090195925 | PATTERNED MAGNETIC RECORDING MEDIA, STAMPER FOR MANUFACTURE OF PATTERNED MAGNETIC RECORDING MEDIA, METHOD OF MANUFACTURING PATTERNED MAGNETIC RECORDING MEDIA, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a patterned magnetic recording media has a magnetic recording layer and a protective layer formed on a substrate, in which the magnetic recording layer including a magnetic material patterned in tracks and a nonmagnetic material filled in between the tracks in a data area, and has a recessed portion formed in an area within 1 mm from an outer media end and extending to the media end. The recessed portion being formed 1 to 50 nm deeper than the data area. | 08-06-2009 |
| 20090195929 | METHOD OF MANUFACTURING DISCRETE TRACK RECORDING MEDIUM AND DISCRETE TRACK RECORDING MEDIUM - According to one embodiment, a method of manufacturing a discrete track recording medium includes forming protruded magnetic patterns on a substrate, and repeating processes of depositing a nonmagnetic material so as to be filled in recesses between the magnetic patterns and etching back the nonmagnetic material two or more times with rotating the substrate in a plane thereof by an angle less than one revolution. | 08-06-2009 |
| 20090201607 | Patterned perpendicular magnetic recording medium and magnetic recording and reproducing apparatus - It is made possible to provide a patterned perpendicular magnetic recording medium that has smaller write magnetic field and the variation of magnetic characteristics in the bit regions, generates fewer reversed magnetic domains in the position control information regions of the head, and has excellent thermal stability. A patterned perpendicular magnetic recording medium includes: a nonmagnetic substrate; a soft magnetic base layer formed on the nonmagnetic substrate; a nonmagnetic intermediate layer formed on the soft magnetic base layer; and a perpendicular magnetic recording layer formed on the nonmagnetic intermediate layer, and including a stacked structure of a CoPt-based crystalline film having a Pt content in the range of 5 atomic percent to 35 atomic percent and a rare-earth and transition metal alloy amorphous film formed on the CoPt-based crystalline film. The CoPt-based crystalline film and the rare-earth and transition metal alloy amorphous film are exchange-coupled. | 08-13-2009 |
| 20090202865 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a magnetic recording medium includes magnetic patterns made of a ferromagnetic recording layer containing Co, and a nonmagnetic layer which separates the magnetic patterns and has a lower Co concentration than the magnetic patterns. | 08-13-2009 |
| 20090232928 | Method of Manufacturing Stamper, and Stamper - According to one embodiment, a method of manufacturing a stamper includes forming a conductive layer on a surface of a master having patterns of protrusions and recesses, forming an electroforming layer on the conductive layer, separating the electroforming layer and the conductive layer from the master to form a stamper to which the patterns of protrusions and recesses of the master are transferred, removing a resist left on the surface of the stamper, and etching the surface of the stamper with an acidic solution having a pH value of less than 3. | 09-17-2009 |
| 20090273858 | SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - It is possible to improve the recording and reproducing S/N ratio, the reproduction signal intensity, and the degree of high density recording. There are provided a plurality of recording tracks formed on a substrate, each recording track being formed of a magnetic material, and non-recording sections formed on the substrate, each non-recording section separating adjacent recording tracks, each recording track including a plurality of recording sections and connecting sections for connecting the recording sections adjacent thereto in a track longitudinal direction, and each connecting section having a cross-sectional area in a track width direction that is smaller than a cross-sectional area in a track width direction of adjacent recording sections. | 11-05-2009 |
| 20090317662 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A magnetic recording medium has magnetic patterns formed of a patterned ferromagnetic layer, and a non-magnetic layer including a component of the ferromagnetic layer and separating the magnetic patterns, in which a thickness “a” of the non-magnetic layer and a thickness “b” of the magnetic patterns satisfy a relationship of: a| 12-24-2009 | |
| 20090321388 | Imprint stamper, manufacturing method of imprint stamper, magnetic recording medium, manufacturing method of magnetic recording medium and magnetic disk apparatus - An imprint stamper for manufacturing a magnetic recording medium with a plurality of recording bits includes a plurality of first concave portions to form the recording bits, a wall portion provided so as to separate the first concave portions from each other, and a second concave portion provided to the wall portion so as to connect one of the first concave portions and the other of the first concave portions adjacent to one of the first concave portions. | 12-31-2009 |
| 20100000965 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes depositing a magnetic recording layer on a substrate, forming masks on areas corresponding to recording regions of the magnetic recording layer, partially etching the magnetic recording layer in areas not covered with the masks with an etching gas to form protrusions and recesses on the magnetic recording layer, modifying the magnetic recording layer remaining in the recesses with a modifying gas to form non-recording regions, and forming a protecting film on an entire surface. | 01-07-2010 |
| 20100000966 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes depositing a magnetic recording layer on a substrate, forming masks on areas corresponding to recording regions of the magnetic recording layer, partially etching the magnetic recording layer in areas not covered with the masks with an etching gas to form protrusions and recesses on the magnetic recording layer, modifying the magnetic recording layer remaining in the recesses with Ne gas to form non-recording regions, and forming a protecting film on an entire surface. | 01-07-2010 |
| 20100006537 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes depositing a magnetic recording layer on a substrate, the magnetic recording layer having a multi-layered structure of two or more layers at least one layer of which has a granular structure including CoCrPt alloy and SiO | 01-14-2010 |
| 20100018946 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a hard mask and a resist on a magnetic recording layer, imprinting a stamper on the resist to transfer patterns of protrusions and recesses, removing resist residues left in the recesses of the patterned resist, etching the hard mask using the patterned resist as a mask to transfer the patterns of protrusions and recesses, stripping the resist, and performing ion beam etching to remove the remaining hard mask and to modify a surface of the magnetic recording layer uncovered with the remaining hard mask. | 01-28-2010 |
| 20100018947 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a magnetic recording layer, an oxidation inhibiting layer, a hard mask layer includes carbon on a substrate, coating the hard mask layer with a resist, transferring patterns of protrusions and recesses to the resist by imprinting to form resist patterns, sequentially performing etching of the hard mask layer using the resist patterns as masks, etching of the oxidation inhibiting layer, and etching and/or magnetism deactivation of the magnetic recording layer to form patterns of the magnetic recording layer, and sequentially performing stripping of the resist patterns, stripping of the hard mask layer and stripping of the oxidation inhibiting layer, in which ion beam etching is used for stripping the oxidation inhibiting layer. | 01-28-2010 |
| 20100047625 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses, and partially etching the magnetic recording layer in areas not covered with patterns of the resist used as masks by ion beam etching using a mixed gas of He and N | 02-25-2010 |
| 20100072069 | Method for manufacturing a stamper - A method for manufacturing an imprint stamper includes the steps of forming a first electroformed layer on a concavo-convex pattern of an original disk with the pattern, peeling off the first electroformed layer to provide a first stamper, forming a second electroformed layer on a concavo-convex pattern of the first stamper, peeling off the second electroformed layer to provide a second stamper, forming a third electroformed layer on a concavo-convex pattern of the second stamper, and peeling off the third electroformed layer to provide a third stamper. In addition, a conductive film is formed at least on one of a bottom of the concave portion and a top surface of the convex portion of the concavo-convex pattern at least in one of the first stamper and the second stamper. | 03-25-2010 |
| 20100078143 | METHOD FOR MANUFACTURING A DUPLICATING STAMPER - A method for manufacturing a duplicating stamper is provided. The method includes the steps of forming a metal film on a stamper, the metal film having an apertural area in a central area of the stamper, lifting up an innermost circular edge of the metal film in order to detach the metal film from the innermost circular edge to the outermost circular edge, and detaching the metal film to provide another stamper. Alternatively, for detaching the metal film, a gas is blown into the apertural area with lifting up the innermost circular edge of the metal film. | 04-01-2010 |
| 20100084374 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a method of manufacturing a magnetic recording medium comprises forming a protective film on a ferromagnetic recording layer containing Cobalt (Co) on a substrate and forming a recess in both the protective film and the ferromagnetic recording layer at a part where a nonmagnetic layer is to be formed. The method further comprises removing Co from a part of the recess of the ferromagnetic recording layer to form the nonmagnetic layer that separates magnetic patterns made of the ferromagnetic recording layer containing Co. The nonmagnetic layer has an identical chemical composition as the ferromagnetic recording layer, except for the nonmagnetic layer having a lower Co concentration than the magnetic patterns. | 04-08-2010 |
| 20100147791 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a first hard mask, a second hard mask and a resist film on a magnetic recording layer, imprinting a stamper on the resist film to transfer patterns of recesses and protrusions, removing residues remained in recess of the patterned resist film, etching the second hard mask using the patterned resist film as a mask to transfer patterns of recesses and protrusions, etching the first hard mask using the patterned second hard mask as a mask to transfer patterns of recesses and protrusions, and deactivating magnetism of the magnetic recording layer exposed in the recesses together with removing the second hard mask by ion-beam etching. | 06-17-2010 |
| 20100155365 | STAMPER MANUFACTURING METHOD - According to one embodiment, when forming first, second, and third stampers by transferring three-dimensional patterns of a master, a height adjusting layer having a film thickness greater on the upper surface of a projection than on the bottom surface of a recess is formed between the second stamper and a second release layer, and the surface of the third stamper is etched with an acidic solution having a pH of less than 3. | 06-24-2010 |
| 20100166415 | Lens barrier device, lens barrel, and imaging device - A lens barrier device includes: a plurality of barrier blades disposed in an oscillatible manner in front of an imaging lens positioned in closest proximity to a subject side in an imaging optical system; and an oscillating mechanism that allows the plurality of barrier blades to oscillate so as to form a fully closed state in which an optical path of the imaging optical system is fully closed and a fully opened state in which the optical path is fully opened by the barrier blades. The oscillating mechanism includes a drive ring that is provided in an inversely rotatable manner within a predetermined angular range about an optical axis of the imaging optical system and allows the plurality of barrier blades to oscillate back and forth to form the fully closed state and the fully opened state by rotating forward and backward. | 07-01-2010 |
| 20100177425 | MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREOF, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A magnetic recording medium has a RAM region and a ROM region. The RAM region includes a plurality of first tracks each having a first magnetic portion. The first magnetic portions in adjacent tracks are separated from each other. The ROM region includes a plurality of second tracks each having a second magnetic portion. A width of the second magnetic portions in a direction perpendicular to a track direction of the first tracks is larger than that of the first magnetic portions in the perpendicular direction. | 07-15-2010 |
| 20100186877 | METHOD OF MANUFACTURING STAMPER - According to one embodiment, a method of manufacturing a stamper includes forming a first stamper from a master plate having lands and grooves through electroforming, forming a second stamper, a width of which is G | 07-29-2010 |
| 20100196528 | STAMPER AND METHOD PRODUCING THE SAME - According to one embodiment, a stamper includes patterns corresponding to recording tracks or recording bits in a data region and patterns corresponding to information in a servo region formed in protrusions and recesses on a front side of the stamper, in which an inner periphery and an outer periphery are processed and, on a back side, an inner peripheral edge, an outer peripheral edge and a main surface of the back side lie on the same plane. | 08-05-2010 |
| 20100213069 | MASTER PLATE AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a master plate for producing a stamper includes a substrate, and patterns of protrusions and recesses formed on the substrate and corresponding to patterns of recording tracks or recording bits in data areas and to information in servo areas, in which the protrusion has a structure in which a first metal layer, a silicon layer and a second metal layer are stacked on the substrate and a metal oxide film is formed on a surface of the protrusion. | 08-26-2010 |
| 20100214694 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a first hard mask, a second hard mask and a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues remaining in the recesses of the patterned resist, etching the second hard mask by using the patterned resist as a mask to transfer the patterns of protrusions and recesses to the second hard mask, etching the first hard mask by using the second hard mask as a mask to transfer the patterns of protrusions and recesses to the first hard mask, removing the second hard mask remaining on the protrusions of the first hard mask, and deactivating the magnetic recording layer exposed in the recesses by means of ion beam irradiation. | 08-26-2010 |
| 20100214695 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a first hard mask, a second hard mask and a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues remaining in the recesses of the patterned resist by means of a first etching gas, etching the second hard mask by means of the first etching gas using the patterned resist as a mask to transfer the patterns to the second hard mask, etching the first hard mask by means of a second etching gas different from the first etching gas using the second hard mask as a mask to transfer the patterns to the first hard mask, and performing ion beam etching in order to deactivate the magnetic recording layer exposed in the recesses and to remove the second hard mask. | 08-26-2010 |
| 20100215989 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a first hard mask, a second hard mask and a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues remaining in the recesses of the patterned resist, etching the second hard mask by using the patterned resist as a mask to transfer the patterns of protrusions and recesses to the second hard mask, etching the first hard mask by using the second hard mask as a mask to transfer the patterns of protrusions and recesses to the first hard mask, subjecting the magnetic recording layer exposed in the recesses to modifying treatment to change an etching rate, and deactivating the magnetic recording layer exposed in the recesses. | 08-26-2010 |
| 20100215990 | PATTERNED MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a method of manufacturing a patterned medium includes depositing a magnetic recording layer and applying an ultraviolet curable resin on both surfaces of a medium substrate, pressing a first resin stamper and a second resin stamper each including patterns of recesses and protrusions, corresponding to a patterned medium, against both surfaces of the medium substrate in such a manner that a direction from a center of the medium substrate toward a center of the first resin stamper is off-oriented from a direction from the center of the medium substrate toward a center of the second resin stamper to imprint the patterns of recesses and protrusions on the ultraviolet curable resin, and irradiating the ultraviolet curable resin with an ultraviolet ray through each of the first and second resin stampers to cure the ultraviolet curable resin. | 08-26-2010 |
| 20100237040 | Method for manufacturing glass stamper, glass stamper, and method for manufacturing magnetic recording medium - A method for manufacturing a glass stamper includes the following steps. First, a diamond film is formed on a substrate. A resist is applied onto the diamond film and a pattern is formed by performing electron beam lithography and development. The diamond film is etched with any one of oxygen and Ar gas using the pattern on the resist as a mask, thereby transferring the pattern to the diamond film. The resist and the substrate are removed to fabricate a diamond mold. Then, a glass stamper is manufactured by glass molding using the diamond mold. | 09-23-2010 |
| 20100247974 | Substrate for magnetic recording medium, magnetic recording medium, and magnetic recording apparatus - It is possible to improve the recording and reproducing S/N ratio, the reproduction signal intensity, and the degree of high density recording. There are provided a plurality of recording tracks formed on a substrate, each recording track being formed of a magnetic material, and non-recording sections formed on the substrate, each non-recording section separating adjacent recording tracks, each recording track including a plurality of recording sections and connecting sections for connecting the recording sections adjacent thereto in a track longitudinal direction, and each connecting section having a cross-sectional area in a track width direction that is smaller than a cross-sectional area in a track width direction of adjacent recording sections. | 09-30-2010 |
| 20100260885 | IMPRINTING APPARATUS - According to one embodiment, an imprinting apparatus includes a first mold configured to hold a disk-shaped stamper on which patterns of recesses and protrusions are formed, a second mold configured to hold a disk-shaped substrate to which a resist is applied so that the substrate faces the stamper held by the first mold, and a suction ring which is disposed around the first mold and in which an inner groove and an outer groove are formed to correspond to an outer periphery portion of the stamper held by the first mold, the inner groove being opened to atmosphere and the outer groove being vacuum-suctioned. | 10-14-2010 |
| 20100264019 | METHOD AND APPARATUS FOR MANUFACTURING MAGNETIC RECORDING MEDIA - According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film. | 10-21-2010 |
| 20100302679 | Patterned media and method of manufacturing the same, and magnetic recording apparatus - A patterned media has a substrate, and a magnetic recording layer on the substrate including protruded magnetic patterns and a nonmagnetic material filled in between the protruded magnetic patterns. In the patterned media, a depth D | 12-02-2010 |
| 20100314253 | STAMPER MANUFACTURING METHOD - According to one embodiment, a three dimensional structure of a stamper is subject to etch by supplying a pulsed electric currentelectric current to the surface of the stamper. | 12-16-2010 |
| 20110000880 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses, and partially etching the magnetic recording layer in areas not covered with patterns of the resist used as masks by ion beam etching using a mixed gas of He and N | 01-06-2011 |
| 20110011830 | Magnetic Recording Media, Magnetic Recording Apparatus, and Method for Manufacturing Magnetic Recording Media - A magnetic recording media includes a toroidal substrate, a surface thereof is divided into a recording area located in a central part between an outer peripheral edge and an inner peripheral edge, edge areas located within 100 μm or more and 2,000 μm or less from the outer and inner peripheral edges, respectively, and adjacent areas located between the edge areas and the recording area, respectively, a magnetic film on the substrate, and a protective film on the magnetic film, in which the magnetic film is thinner in the edge areas than that in the adjacent areas, and at least a part of the protective film in the edge areas is thicker than that in the adjacent areas. | 01-20-2011 |
| 20110014496 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, there is provided a method of manufacturing a magnetic recording medium, including forming a first hard mask including carbon as a main component, a second hard mask including a main component other than carbon and a resist on a magnetic recording layer, contacting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues in the recesses of the patterned resist, etching the second hard mask, etching the first hard mask, patterning the magnetic recording layer, and removing the first hard mask, the method further including, between etching the first hard mask and removing the first hard mask, removing the second hard mask remaining on the protrusions of the first hard mask, and removing a contaminating layer on a surface of the first hard mask by a mixed gas of oxygen-based gas and a fluorine compound. | 01-20-2011 |
| 20110049090 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a magnetic recording layer, an etching protection layer, and an adhesion layer on a substrate, applying a resist on the adhesion layer, transferring patterns of protrusions and recesses on the resist by imprinting to form a resist pattern, patterning the adhesion layer by using the resist pattern as a mask, patterning the etching protection layer by using the resist pattern as a mask, etching the magnetic recording layer by using patterns of the adhesion layer and the etching protection layer as masks to form patterns of protrusions and recesses of the magnetic recording layer and removing the pattern of the adhesion layer, stripping the pattern of the etching protection layer, and exposing the patterns of protrusions and recesses of the magnetic recording layer to a non-ionized reducing gas. | 03-03-2011 |
| 20110132752 | PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC READ/WRITE APPARATUS - According to one embodiment, an electroforming master comprises a patterns of protrusions and recesses formed on one major surface of an Si substrate having two major surfaces, corresponding to information for positioning of a read/write head (a preamble, address, and burst), recording tracks or recording bits. Impurity ions are doped in the surface of this patterns of protrusions and recesses. The impurity ion concentration distribution in the film thickness direction of the Si substrate has a peak in a portion from the patterns of protrusions and recesses surface to a depth of 40 nm in the film thickness direction. The impurity concentration of this peak is 1×10 | 06-09-2011 |
| 20110132754 | PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC READ/WRITE APPARATUS - According to one embodiment, patterns of protrusions and recesses includes a substrate including a conductive region on at least one major surface, and a projecting pattern layer formed on the conductive region on the major surface, and made of a microcrystalline material, a polycrystalline material, an amorphous material, or an oxide of the microcrystalline, polycrystalline, or amorphous material. | 06-09-2011 |
| 20110164337 | SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - In an example magnetic recording medium substrate, a plurality of recording tracks are formed on a substrate, each recording track being formed of a magnetic material. Non-recording sections are formed on the substrate, each non-recording section separating adjacent recording tracks. Each recording track includes a plurality of recording sections and connecting sections for connecting the recording sections adjacent thereto in a track longitudinal direction, and each connecting section has a cross-sectional area in a track width direction that is smaller than a cross-sectional area in a track width direction of adjacent recording sections. | 07-07-2011 |
| 20110165438 | METHOD OF MANUFACTURING DISCRETE TRACK RECORDING MEDIUM AND DISCRETE TRACK RECORDING MEDIUM - According to one embodiment, a method of manufacturing a discrete track recording medium includes forming protruded magnetic patterns on a substrate, and repeating processes of depositing a nonmagnetic material so as to be filled in recesses between the magnetic patterns and etching back the nonmagnetic material two or more times with rotating the substrate in a plane thereof by an angle less than one revolution. | 07-07-2011 |
| 20110235212 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming on a magnetic recording layer a first hard mask, a second hard mask, a third hard mask and a resist, imprinting the resist with a stamper, removing a residue left in the recesses of the patterned resist, etching the third hard mask by use of the patterned resist as a mask, etching the second hard mask by use of the third hard mask as a mask, etching the first hard mask by use of the second hard mask as a mask, forming a pattern of the magnetic recording layer with ion beam irradiation, and removing the first hard mask by use of a remover liquid with higher reactivity to the metal material of the first hard mask than to a constituent element of the magnetic recording layer. | 09-29-2011 |
| 20110242706 | MAGNETIC RECORDING MEDIUM - According to one embodiment, a servo area of a magnetic recording medium includes magnetic dots arrayed at a period L | 10-06-2011 |
| 20110267718 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a magnetic recording medium includes a plurality of magnetic dots having a pattern formed by self organization. The density of magnetic dots in a peripheral portion of a central portion in a widthwise direction is higher than that of magnetic dots in the central portion at a burst portion of the magnetic recording medium. | 11-03-2011 |
| 20120000885 | STAMPER, METHOD OF MANUFACTURING THE STAMPER, AND MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD USING THE STAMPER - According to one embodiment, a stamper manufacturing method includes forming a conductive material concentration gradient layer including the projections pattern, and a composition ratio of a buffering agent to a conductive material in the conductive material concentration gradient layer reducing in a thickness direction from a master side. | 01-05-2012 |
| 20120009439 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming protruded magnetic patterns on a substrate, depositing a nonmagnetic material in recesses between the magnetic patterns and on the magnetic patterns, and etching back the nonmagnetic material using an oxygen-containing etching gas while reforming a surface of the nonmagnetic material. | 01-12-2012 |
| 20120028076 | MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF - According to one embodiment, a magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, a magnetic recording layer, and a protective layer, wherein the magnetic recording layer is provided with a pattern including recording portions and non-recording portions, the non-recording portions have a composition that is equal to a composition obtained by demagnetizing the recording portions, the non-recording portions contain at least one metal element selected from the group consisting of vanadium and zirconium and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen is contained in the non-recording portions at a higher content than the content of the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen in the recording portions. | 02-02-2012 |
| 20120067843 | Method of forming fine pattern - A method of forming a fine pattern according to an embodiment includes: forming a hard mask on a substrate; forming a mask reinforcing member on the hard mask; forming a di-block copolymer layer on the mask reinforcing member, the di-block copolymer layer comprising a sea-island structure; forming a pattern comprising a concave-convex structure in the di-block copolymer layer, with island portions of the sea-island structure being convex portions; and transferring the pattern onto the hard mask by performing etching on the mask reinforcing member and the hard mask, with a mask being the pattern formed in the di-block copolymer layer. The mask reinforcing member is comprised of a material having an etching speed that is higher than an etching speed for the hard mask and is lower than an etching speed for sea portions of the sea-island structure of the di-block copolymer layer. | 03-22-2012 |
| 20120067844 | METHOD OF MANUFACTURING RECORDING MEDIUM - According to one embodiment, in a method manufacturing a magnetic recording medium which is configured such that a ferromagnetic recording part is formed on a substrate in a desired track pattern or a desired bit pattern, a ferromagnetic film is formed on a substrate, and then a B thin film is formed on a region for isolating the ferromagnetic film between tracks or bits. Subsequently, ions are radiated on the B thin film, thereby increasing a B content of the region of the ferromagnetic film, on which the B thin film has been formed, and nonmagnetizing the region. | 03-22-2012 |
| 20120069468 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING APPARATUS - According to one embodiment, in a method of manufacturing a magnetic recording medium which is configured such that a ferromagnetic recording part is formed on a substrate in a desired track pattern or a desired bit pattern, a ferromagnetic film is formed on the substrate, and then a mask is formed on the ferromagnetic film, the mask having an opening above a region for isolating the ferromagnetic film between tracks or bits. Subsequently, a B-based gas is radiated on the region of the ferromagnetic film through the opening of the mask, thereby increasing a B content of the region to nonmagnetize the region. | 03-22-2012 |
| 20120082800 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, there is provided a method for manufacturing a magnetic recording medium, the method including: depositing a magnetic recording layer on a substrate; forming a mask on a region of the magnetic recording layer corresponding to a recording area; irradiating another region of the magnetic recording layer where the mask is not formed with an ion beam using a C-containing gas as a source gas to deactivate the another region and to thereby form a non-recording area; and forming a protective film over an entire surface of the substrate. | 04-05-2012 |
| 20120087039 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a magnetic recording medium includes a substrate, and a magnetic recording layer formed on the substrate. The magnetic recording layer includes recording portions having patterns regularly arranged in an longitudinal direction and containing cobalt and platinum, and non recording portions formed between the recording portions and containing boron and at least one light rare earth metal selected from the group consisting of yttrium, lanthanum, and cerium. | 04-12-2012 |
| 20120118853 | MANUFACTURING METHOD OF MASTER DISK FOR PATTERNED MEDIUM AND MAGNETIC RECORDING DISK MANUFACTURING METHOD - According to one embodiment, a method for manufacturing a master disk for discoid patterned medium having a plurality of sectors arranged in a circumferential direction, the plurality of sectors including a recording data portion and a servo data portion that includes a sector identification region having gaps formed in a linear pattern is provided. An imprint master disk having a linear pattern which is common to the sectors before the gaps are formed in the sector identification region and including at least one pattern of the sector is prepared, imprinting is repeated in the circumferential direction by using the imprint master disk to form patterns of a discoid patterned medium on a substrate, and a sector identification pattern is formed in each sector by forming gaps in the linear pattern of each sector identification region among the patterns formed on the substrate. | 05-17-2012 |
| 20120177948 | PATTERNED MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a method of manufacturing a patterned medium includes depositing a magnetic recording layer and applying an ultraviolet curable resin on both surfaces of a medium substrate, pressing a first resin stamper and a second resin stamper each including patterns of recesses and protrusions, corresponding to a patterned medium, against both surfaces of the medium substrate in such a manner that a direction from a center of the medium substrate toward a center of the first resin stamper is off-oriented from a direction from the center of the medium substrate toward a center of the second resin stamper to imprint the patterns of recesses and protrusions on the ultraviolet curable resin, and irradiating the ultraviolet curable resin with an ultraviolet ray through each of the first and second resin stampers to cure the ultraviolet curable resin. | 07-12-2012 |
| 20120251655 | Method of Manufacturing Stamper, and Stamper - According to one embodiment, a stamper is described with a surface that comprises patterns of protrusions and recessed. The arithmetic average roughness Ra of the surface is 1 nanometer (nm) or more and 5 nm or less. | 10-04-2012 |
| 20130004724 | MASTER FOR PRODUCING STAMPER - In one embodiment, there is provided a master for producing a stamper. The master includes: a substrate made of a first material and comprising a first surface, wherein the first surface of the substrate is formed with a groove; a first layer made of a second material and formed in the groove, wherein the second material is different from the first material, and wherein a surface of the first layer is substantially flush with the first surface of substrate; and a projection portion formed on at least one of the first surface of the substrate and the surface of the first layer. The first material is silicon and the second material is selected from silicon oxide, aluminum oxide, titanium oxide, and glass. | 01-03-2013 |
| 20130069272 | METHOD OF MANUFACTURING MOLD AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble. | 03-21-2013 |
| 20130075358 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A magnetic recording medium a magnetic recording medium includes a soft magnetic layer formed on a substrate, magnetic patterns made of a protruded ferromagnetic layer separated from each other on the soft magnetic layer, and a nonmagnetic layer formed between the magnetic patterns, a nitrogen concentration therein being higher on a surface side than on a substrate side. | 03-28-2013 |
| 20130075361 | PATTERN FORMING METHOD - A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate. | 03-28-2013 |
| 20130077191 | MAGNETIC DISK AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A magnetic disk according to an embodiment includes: a plurality of data regions each including a plurality of tracks, each of the tracks being arranged to extend in a circumferential direction; a servo region provided between the data regions, the servo region extending in a radial direction, the servo region including: a plurality of guide patterns each extending in the radial direction; and at least one line of dots arranged by post patterns in the radial direction at least on a side of one of adjacent guide patterns, the post patterns being arranged in the radial direction between the adjacent guide patterns. | 03-28-2013 |
| 20130200041 | Method for Manufacturing Glass Stamper and Method for Manufacturing Magnetic Recording Medium - A method for manufacturing a glass stamper includes the following steps. First, a diamond film is formed on a substrate. A resist is applied onto the diamond film and a pattern is formed by performing electron beam lithography and development. The diamond film is etched with any one of oxygen and Ar gas using the pattern on the resist as a mask, thereby transferring the pattern to the diamond film. The resist and the substrate are removed to fabricate a diamond mold. Then, a glass stamper is manufactured by glass molding using the diamond mold. | 08-08-2013 |
| 20130256263 | PATTERN FORMING METHOD AND IMPRINT MOLD MANUFACTURING METHOD - In one embodiment, a pattern forming method includes: forming a functional layer having a functional group to cross-link a first polymer on a substrate; forming a diblock copolymer layer having the first polymer and a second polymer on the functional layer; self-assembling the diblock copolymer layer to form a self-assembled layer, the self-assembled layer having a first domain corresponding to the first polymer, and a plurality of second domains corresponding to the second polymer and surrounded by or interposed in the first domain; cross-linking the first polymer in the self-assembled layer with the functional group in the functional layer to form a bonding layer disposed in the self-assembled layer and bonded to the functional layer; and washing or etching the self-assembled layer to remain the bonding layer. | 10-03-2013 |
| 20130295299 | MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF - According to one embodiment, a magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, a magnetic recording layer, and a protective layer, wherein the magnetic recording layer is provided with a pattern including recording portions and non-recording portions, the non-recording portions have a composition that is equal to a composition obtained by demagnetizing the recording portions, the non-recording portions contain at least one metal element selected from the group consisting of vanadium and zirconium and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen is contained in the non-recording portions at a higher content than the content of the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen in the recording portions. | 11-07-2013 |
| 20140030554 | MAGNETIC RECORDING MEDIUM AND METHOD OF FABRICATING THE SAME - In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and third directions; and a boundary magnetic part having a plurality of first magnetic portions arrayed in a line in the third direction and each having a length longer than that of the first magnetic dot in the third direction, and a second magnetic dot disposed between the first magnetic portions and disposed on extensions in the first and second directions of the first magnetic dots, and disposed along with the data area on the substrate. | 01-30-2014 |
| 20140097152 | SELF-ASSEMBLED PATTERN FORMING METHOD - A self-assembled pattern forming method in an embodiment includes: forming a guide pattern on a substrate; forming a layer of a first polymer; filling a first block copolymer; and phase-separating the first block copolymer. The guide pattern includes a first recessed part having a depth T and a diameter D smaller than the depth T, and a second recessed part having a width larger than double of the diameter D. The first block copolymer has the first polymer and a second polymer which are substantially the same in volume fraction. By phase-separating the first block copolymer, a cylinder structure and a lamellar structure are obtained. | 04-10-2014 |
| 20140138354 | IMPRINT METHOD - An imprint method according to this embodiment includes preparing a mold having a recessed portion, filling the recessed portion with a mold non-reactive material, pressing the mold against a resist which is applied on a base material, curing the resist in a state that the mold is pressed, and separating the mold from the base material. The mold non-reactive material is a material which does not chemically react with a material of the mold. By curing of the resist, the resist and the mold non-reactive material are coupled. When the mold is separated from the base material, the resist and the mold non-reactive material are left on the base material. | 05-22-2014 |
| 20140374380 | STAMPER AND METHOD OF MANUFACTURING BIT PATTERNED MEDIUM USING STAMPER - A stamper of an embodiment includes: a base portion having a main surface; and a plurality of guides arranged on the main surface in mutually different first and second directions and serving as references of arrangement of a plurality of self-assembled dots. A distance between the guides in a third direction is within a range of an integer m | 12-25-2014 |
