| Entries |
| Document | Title | Date |
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| 20080199733 | Production Process of Magnetic Recording Medium, Magnetic Recording Medium, and Magnetic Recording and Reproducing Apparatus - A production process of magnetic recording media is provided in which, when using an oxide magnetic material as a perpendicular magnetic recording layer and forming a carbon protective layer using a plasma CVD method, stripping of the carbon protective layer and separation of a lubrication layer can be prevented, and satisfactory recording and reproduction characteristics can be obtained. In the production process of magnetic recording media, the magnetic recording media consists of, at least, a substrate | 08-21-2008 |
| 20080226946 | Magnetic disc, stamper for making magnetic disc, and method for making magnetic disc - A magnetic disc has a data area including a magnetic data zone and nonmagnetic portions for physically separating the magnetic data zone, and also has a servo area provided with a magnetic pattern made up of magnetic portions and nonmagnetic portions. The servo area includes a belt-like area elongated in a radial direction of the magnetic disc and having a circumferential length at least twice as long as a unit length readable by a magnetic head in a circumferential direction of the magnetic disc. The belt-like area is provided with magnetic regions and nonmagnetic regions alternating with each other in the radial direction of the disc, where each of the magnetic and nonmagnetic regions extends from the first end to the second end of the belt-like area that are spaced from each other in the circumferential direction of the disc. | 09-18-2008 |
| 20080254321 | Coatings for Particle Reduction - Coatings for particle suppression are provided. Such coatings comprise fluorochemical moieties and reactive pendant groups. | 10-16-2008 |
| 20080268289 | Perpendicular magnetic recording medium and manufacturing method thereof - Embodiments of the present invention provide a perpendicular magnetic recording medium with less medium noise, excellent overwrite characteristics, and scratch resistance. According to one embodiment, when an Ar gas with addition of a micro-amount of oxygen is used upon forming an upper Ru intermediate layer, a micro-structure of a magnetic layer formed thereon can be formed in a state where no magnetic oxide region is segregated and the magnetic crystal grains are isolated. In this case, a gas pressure for forming the upper intermediate layer is set to 5 Pa or more and 12 Pa or less which is a region much higher compared with 0.5 Pa or more and 1 Pa for the lower Ru intermediate layer. Since writing by a head becomes difficult remarkably in the perpendicular magnetic medium having magnetic crystal grains promoted for isolation, a second magnetic layer for facilitating magnetization reversal by lowering the oxide concentration and somewhat strengthening coupling between particles only in the magnetic layer on the side of the surface is formed to a layer above the first magnetic layer as a main part. | 10-30-2008 |
| 20090011280 | Magnetic head manufacturing method, magnetic head, and magnetic storage device - The present invention relates to a magnetic head manufacturing method used for a magnetic storage device. The method includes the steps of forming a first groove in a shape corresponding to an outline of a main magnetic pole on an insulation layer; forming a second groove corresponding to an outline of a main magnetic pole brace layers; inside the outline of the main magnetic pole; and using a plating method to fill the first and second grooves at the same time with a ferromagnetic material and form a main magnetic pole and a main magnetic pole brace layer at the same time. | 01-08-2009 |
| 20090081481 | Magnetic head and method of manufacturing the same - A plurality of magnetic heads are formed on a substrate, each of the magnetic head includes a reproducing element to read magnetic information, a recording element to write magnetic information, a reproducing element marker formed on the same plane as that on which the reproducing element is formed, and a recording element marker formed on the same plane as that on which the recording element is formed. The substrate is cut to form a bar including a plurality of the magnetic heads. The bar is held, the reproducing element marker and the recording element marker in the held bar are optically sensed, and positions of the reproducing element marker and the recording element marker are determined. A posture of the held bar is adjusted based on the positions of the reproducing element marker and the recording element marker. The bar with the posture adjusted is polished and then the polished bar is cut into individual magnetic heads. | 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 |
| 20090117407 | SHORT FLARE DEFINITION BY ADDITIVE PROCESS FOR PERPENDICULAR HEAD - A method for manufacturing a magnetic write head for perpendicular magnetic recording. The method includes forming a write pole, and then depositing a refill layer. A mask structure can be formed over the writ pole and refill layer, the mask structure being configured to define a stitched pole. An ion milling or reactive ion milling can then be performed to remove portions of the refill layer that are not protected by the mask structure. Then a magnetic material can be deposited to form a stitched write pole that defines a secondary flare point. The stitched pole can also be self aligned with an electrical lapping guide in order to accurately locate the front edge of the secondary flare point relative to the air bearing surface of the write head. | 05-07-2009 |
| 20090155626 | MAGNETIC RECORDING MEDIUM - According to an aspect of an embodiment, a magnetic recording medium includes: a soft magnetic underlayer disposed on a substrate; a foundation layer on the soft magnetic underlayer, the foundation layer including a plurality of Ru crystal grains isolated from each other at an upper portion of the foundation layer; a first magnetic layer including a plurality of magnetic crystal grains on the plurality of the Ru crystal grains of the foundation layer; and a second magnetic layer disposed on the plurality of magnetic crystal grains of the first magnetic layer, the second magnetic layer including a plurality of magnetic crystal grains having axes of easy magnetization in the direction perpendicular to the major surface of the substrate and nonmagnetic materials interposed between the crystal grains, the magnetic crystal grains of the first magnetic layer having a smaller grain size than those of the second magnetic layer. | 06-18-2009 |
| 20090176128 | STRUCTURED MATERIAL, MAGNETIC RECORDING MEDIUM UTILIZING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - The invention provides a structured material composed by including a noble metal, in which an oriented layer is formed on a layer containing a Group 4A metal. The invention enables to form an oriented layer, which has required a high temperature for formation, by a low temperature process. | 07-09-2009 |
| 20090208777 | Magnetic head manufacturing method, magnetic head, angle setting device and lapping device - In a magnetic head manufacturing method, a floated surface of each block having plural magnetic head elements formed and arranged on a substrate is ground and lapped in a grinding/lapping step. The grinding/lapping step contains an angle adjusting step for adjusting the angle of the floated surface of the block with reference to a magnetic-head-element formed surface of a substrate and grinding the floated surface concerned, and a finishing lapping step of lapping the floated surface at an angle adjusted in the angle adjusting step. | 08-20-2009 |
| 20090226761 | THIN FILM MAGNETIC HEAD - The thin-film magnetic head in accordance with the present invention comprises a magnetic pole, a coil surrounding the magnetic pole, and an insulating layer covering the coil, while the insulating layer is formed from a resin containing a carbon nanotube. Preferably, the resin contains 0.05 to 5 wt % of the carbon nanotube. Preferably, the resin contains a cyclodextrin. | 09-10-2009 |
| 20090239098 | MAGNETIC HEAD AND METHOD FOR PRODUCING THE SAME - According to an aspect of an embodiment, a method for producing a magnetic head includes forming a plating base layer on a substrate; forming a magnetic layer including an enlarged portion and a narrowed portion extending therefrom on the plating base layer by plating; forming a resist pattern on the magnetic layer and the plating base layer, the resist pattern corresponding to the shape of the magnetic layer and entirely covering the magnetic layer with a margin such that the margin around the narrowed portion is larger than that around the enlarged portion; and patterning the plating base layer by etching with the resist pattern used as a mask. The method further includes forming an insulating layer over the magnetic layer and the plating base layer; and forming an auxiliary magnetic layer on the insulating layer so that the auxiliary magnetic layer is magnetically connected to the magnetic layer. | 09-24-2009 |
| 20100047626 | SUBSTRATE FOR SUSPENSION, PROCESS FOR PRODUCING THE SAME, SUSPENSION FOR MAGNETIC HEAD, AND HARD DISK DRIVE - A substrate for suspension | 02-25-2010 |
| 20100136370 | PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - The present invention provides a magnetic recording medium capable of reducing the diameter of particles of a perpendicular magnetic recording layer and obtaining a high perpendicular orientation to enable information to be recorded or reproduced at a high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A perpendicular magnetic recording medium includes a non-magnetic substrate; and at least a soft magnetic layer, an underlayer, an intermediate layer, and a perpendicular magnetic recording layer that are formed on the non-magnetic substrate in this order. The underlayer is a (111) crystal orientation layer having an fcc structure, and the intermediate layer includes a (110) crystal orientation layer having a bcc structure and a (002) crystal orientation layer having an hcp structure in this order. The (110) crystal orientation layer having the bcc structure includes 60 at % or more of Cr. | 06-03-2010 |
| 20100173175 | MAGNETIC RECORDING MEDIUM, PROCESS FOR PRODUCING SAME, AND MAGNETIC RECORDING REPRODUCING APPARATUS - A magnetic recording medium is provided, which has at least one soft magnetic layer, at least one seed layer, at least one underlayer and at least one perpendicular magnetic recording layer, and is characterized in that the or each seed layer is comprised of a covalently bonded material. The covalently bonded material preferably predominantly comprises a nitride having a hexagonal crystal structure, more preferably, predominantly comprises aluminum nitride having a hexagonal wurtzite crystal structure. This magnetic recording medium is superior in recording and reproducing an information with high density. | 07-08-2010 |
| 20100190034 | SURFACE TREATMENT, SURFACE-TREATED HEAD SLIDER OR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING-REPRODUCING DEVICE - A novel technology for lowering the surface free energy is provided. A treatment surface is irradiated with ultraviolet light in a gas containing a fluorine-containing organic substance, thereby forming a coating layer on the treatment surface. | 07-29-2010 |
| 20100221579 | METHOD FOR MANUFACTURING PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The present invention relates to a method for manufacturing a perpendicular magnetic recording medium including a nonmagnetic substrate, and at least a soft magnetic under layer, an orientation control layer, a magnetic recording layer constituted of two or more layers and a protective layer formed on the nonmagnetic substrate, the method including a step of forming a first magnetic recording layer having a granular structure constituted of ferromagnetic crystal grains and crystal grain boundaries made of a nonmagnetic oxide or nitride on the nonmagnetic substrate side, a step of forming a second magnetic recording layer constituted only of ferromagnetic crystal grains, a step of forming a surface unevenness control layer for decreasing surface unevenness of the first magnetic recording layer located between the first magnetic recording layer and the second magnetic recording layer, and a step of heating the nonmagnetic substrate so as to decrease a surface roughness Ra of the second magnetic recording layer to less than 2 nm. The present invention also relates to a magnetic recording and reproducing apparatus using the magnetic recording medium. | 09-02-2010 |
| 20110059336 | MAGNETIC HEAD WITH TEXTURED SURFACES - A method according to one embodiment includes contacting an oxidant with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion. A method according to another embodiment includes contacting a peroxide with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion from a media bearing surface of the AlTiC portion. A magnetic head according to yet another embodiment includes an AlTiC portion having a media bearing surface; and a thin film portion coupled to the AlTiC portion, wherein TiC grains of the AlTiC portion are recessed from the media bearing surface. | 03-10-2011 |
| 20110086240 | DOUBLE PATTERNING HARD MASK FOR DAMASCENE PERPENDICULAR MAGNETIC RECORDING (PMR) WRITER - Various embodiments of the subject disclosure provide a double patterning process that uses two patterning steps to produce a write structure having a nose shape with sharp corners. In one embodiment, a method for forming a write structure on a multi-layer structure comprising a substrate and an insulator layer on the substrate is provided. The method comprises forming a hard mask layer over the insulator layer, performing a first patterning process to form a pole and yoke opening in the hard mask layer, performing a second patterning process to remove rounded corners of the pole and yoke opening in the hard mask layer, removing a portion of the insulator layer corresponding to the pole and yoke opening in the hard mask layer to form a trench in the insulator layer, and filling the trench with a magnetic material. | 04-14-2011 |
| 20110091744 | Method for manufacturing CPP-type thin film magnetic head provided with a pair of magnetically free layers - The present invention relates to a method of manufacturing a DFL type thin film magnetic head. The method includes laminating each of the layers from the lower magnetization control layer to the upper exchange coupling layer above the substrate; laminating an auxiliary magnetization control layer including at least a CoZrTa layer above the upper exchange coupling layer; forming at least each of the layers from the lower exchange coupling layer to the auxiliary magnetization control layer in pillar shape, and disposing the bias magnetic field application layer at an opposite position with respect to the ABS of each of the pillar shaped layers; trimming the auxiliary magnetization control layer by removing a part of the auxiliary magnetization control layer that is formed in the pillar shape, and disposing the upper shield layer such that the trimmed auxiliary magnetization control layer is at least covered. | 04-21-2011 |
| 20110135959 | PMR WRITER AND METHOD OF FABRICATION - Embodiments of the invention provide a magnetic recording head including a write pole having increasing magnetic moment from a leading edge of the write pole to a trailing edge of the write pole, and methods for manufacturing the same. The write pole may be formed with a plurality of different magnetic material layers having different magnetic moments. A first magnetic layer may be formed with a first magnetic material adjacent a leading edge of the write pole. A second magnetic layer having a greater moment may be formed on the first magnetic layer, thereby increasing the magnetic moment from the leading edge of the write pole to the trailing edge of the write pole. | 06-09-2011 |
| 20110135960 | Inhomogeneous compounds having high magnetic resistance, the production and use thereof - The invention relates to inorganic, intermetallic, inhomogeneous compounds having a magnetic resistance effect and an intrinsic field sensitivity of at least 7% at 1 T at room temperature. The invention further relates to a method for the production and use thereof, particularly as magnetic field sensors or in spin electronics. | 06-09-2011 |
| 20110268991 | HEAD WITH HIGH READBACK RESOLUTION - An apparatus that includes a first read shield and a second read shield and a reader stack between the first and second read shields. The first and second read shields each include a thin high permeability layer closest to the reader stack and a low permeability layer and/or a geometric feature to control magnetic field flux lines in a free layer of the reader stack. | 11-03-2011 |
| 20120021253 | LUBRICANT COMPOSITION AND USE THEREOF - [Problem] Provided is a novel lubricant composition that is useful as a material of a lubricating layer of a magnetic recording medium. | 01-26-2012 |
| 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 |
| 20120045662 | Recording Head For Heat Assisted Magnetic Recording With Diffusion Barrier Surrounding A Near Field Transducer - An apparatus includes a near field transducer positioned adjacent to an air bearing surface, a first magnetic pole, a heat sink positioned between the first magnetic pole and the near field transducer, and a diffusion barrier positioned between the near field transducer and the first magnetic pole. The diffusion barrier can be positioned adjacent to the magnetic pole or the near field transducer. | 02-23-2012 |
| 20120231297 | LUBRICANT COMPOSITION, FLUORINE-BASED COMPOUND, AND USE THEREOF - Disclosed is a lubricant composition comprising at least one kind of compound represented by following formula (1): | 09-13-2012 |
| 20120270072 | MAGNETIC SHIELD WITH IN-PLANE ANISOTROPY - An apparatus and associated method are generally directed to a magnetic shield capable of screening magnetic flux with in-plane anisotropy. Various embodiments of the present invention may have at least one magnetic shield. The shield may be constructed of a Cobalt-Iridium compound capable of providing in-plane anisotropy along a longitudinal plane of the shield. | 10-25-2012 |
| 20120301746 | RADIATOR-COOLED NANOWIRE-BASED WRITE ASSIST - An apparatus for cooling a nanowire in a wire assisted magnetic recording head using a radiator in close proximity to a shield of the write pole. The radiator may further contain current restraints (e.g., slits, cuts, or resistive materials) that maximize current density in the nanowire at a location that corresponds to the current restraints. These current restraints may be further arranged to align with a write pole such that the current is forced to flow primarily through the nanowire when the nanowire is closest to the write pole. The nanowire may then be used either as main or auxiliary writing element for recording signals to a high coercivity media. Moreover, the nanowire and radiator may be combined into a single nanofoil which has a least two portions that perform a similar function as both the nanowire and radiator. | 11-29-2012 |
| 20130065084 | Tuned Shunt Ratio For Magnetic Sensors - Various embodiments can have a data read stack positioned on an air bearing surface (ABS). The data read stack may be disposed between first and second buffer layers, where at least one of the buffer layers can be configured to provide a predetermined shunt ratio for the data read stack. | 03-14-2013 |
| 20130065085 | Tuned Angled Uniaxial Anisotropy in Trilayer Magnetic Sensors - Various embodiments may be constructed with a trilayer stack that is positioned on an air bearing surface (ABS). The trilayer stack can be configured with a stripe height along an axis orthogonal to the ABS and with first and second magnetic free layers that each has an angled uniaxial anisotropy with respect to the ABS. | 03-14-2013 |
| 20130089752 | Forming a Bridging Feature Using Chromeless Phase-Shift Lithography - An elongated, chromeless, bridging feature is formed on a photolithography mask with an etching depth that causes a nominal phase difference of more than 180 degrees to energy passing through the photolithography mask. A corresponding photoresist feature is formed using the bridging feature. The phase difference may be chosen to minimize dimensional variation of the corresponding photoresist feature. | 04-11-2013 |
| 20130244057 | MAGNETIC HEAD - A magnetic storage and retrieval system and a manufacturing technique thereof are disclosed herein. A chemical reaction is triggered upon a surface of each Metallic layer of a plurality of metallic layers disposed on a substrate. It is also determined whether a metallic material of the surface has transformed to a new metallic material that is more chemically resistant than the metallic material. | 09-19-2013 |
| 20140057133 | ALIGNED MAGNETIC INSULATING FEATURE - Various apparatus and associated method embodiments are generally directed to a magnetic stack positioned on an air bearing surface (ABS) and biased to a predetermined magnetization by a bias magnet. The bias magnet can be separated from the magnetic stack and at least one magnetic shield by a self-aligned magnetic insulating feature that is comprised of first and second insulating layers. | 02-27-2014 |
| 20140087210 | METHODS OF FORMING A METALLIC OR CERAMIC ARTICLE HAVING A NOVEL COMPOSITION OF FUNCTIONALLY GRADED MATERIAL AND ARTICLES CONTAINING THE SAME - There is disclosed a method of making a metallic or ceramic component, such as a cutting or forming tool, from at least two distinct powder precursors. In one embodiment, the method comprising forming a first mixture comprised of a plurality of coated particles, such as Tough-Coated Hard Powder (TCHP) composite particles created by encapsulating extremely hard core particles with very tough binder and structural materials, and at least one support powder, such as a carbide, typically WC—Co. The mixture is formed into a green body and sintered to form a functionally graded or multicomponent article. Non-limiting examples of the articles made from the disclosed methods are also disclosed and include drills, mills, cutting tools, forming tools, wires dies and mechanical components. | 03-27-2014 |
| 20140178713 | MAGNETIC READ SENSOR WITH DUAL LAYER INSULATION - A magnetic read sensor having reduced hard bias free layer spacing and improved insulation robustness between the hard bias layers and the shield and sensor. The read sensor has a novel bi-layer insulation layer that can be made very thin while also providing good electrical insulation to prevent sense current shunting. The bi-layer insulation layer can be made by a process that provides improved sensor performance. | 06-26-2014 |
