Magnetic Coating Patents (Class 427/128)
  • Patent number: 8852677
    Abstract: A method for fabricating a synthetic antiferromagnetic device, includes depositing a magnesium oxide spacer layer on a reference layer having a first and second ruthenium layer, depositing a cobalt iron boron layer on the magnesium oxide spacer layer; and depositing a third ruthenium layer on the cobalt iron boron layer, the third ruthenium layer having a thickness of approximately 0-18 angstroms.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: October 7, 2014
    Assignee: International Business Machines Corporation
    Inventors: David W. Abraham, Michael C. Gaidis, Janusz J. Nowak, Daniel C. Worledge
  • Patent number: 8846137
    Abstract: On manufacturing a magnetic disk having at least a magnetic layer (60), a protective layer (70), and a lubricating layer (80) formed in this order over a substrate (10), the lubricating layer is formed by using a coating solution in which a perfluoropolyether compound having a perfluoropolyether main chain and a hydroxyl group in a structure thereof is dispersed and dissolved in a fluorine-based solvent having a boiling point of 90° C. or more.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: September 30, 2014
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventors: Koichi Shimokawa, Katsushi Hamakubo, Kae Itoh
  • Publication number: 20140284515
    Abstract: This ferrite thin film-forming composition is a composition for forming a thin film of NiZn ferrite, CuZn ferrite, or NiCuZn ferrite using a sol-gel method, and the composition includes: metal raw materials; and a solvent containing N-methyl pyrrolidone, wherein a ratio of an amount of N-methyl pyrrolidone to 100 mass % of the total amount of the composition is in a range of 30 to 60 mass %.
    Type: Application
    Filed: February 14, 2014
    Publication date: September 25, 2014
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Toshihiro Doi, Hideaki Sakurai, Nobuyuki Soyama, Kenzo Nakamura, Kazunori Igarashi
  • Patent number: 8840955
    Abstract: A method of manufacturing a magnetic recording medium is disclosed, as well as a magnetic recording medium manufactured by the method. In the manufacturing method, the uneven pattern has magnetic recording elements in protruding portions formed above a substrate, and depressed portions between the recording elements are filled with a filling material. The method allows a high quality magnetic recording medium to be manufactured inexpensively by eliminating the process of removing excess filling material used to fill depressions between magnetic recording elements, because the method allows material to be filled only in the depressed portions of an uneven pattern. The method includes a technique rendering the wettability of the protruding portion surfaces and the depressed portion surfaces different prior to the process of filling with the filling material.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: September 23, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Narumi Sato
  • Publication number: 20140272470
    Abstract: Apparatus for recording data and method for making the same. In accordance with some embodiments, a magnetic layer is supported by a substrate and comprises a magnetic magnetic material, a non-magnetic material, and an energy assisted segregation material. The segregation material enhances segregation of the non-magnetic material into grain boundaries within the layer at an elevated, moderate energy level.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Chun Wang, Connie Liu, Thomas P. Nolan, Kueir-Weei Chour
  • Publication number: 20140264142
    Abstract: A method is described for inserting or dispersing quartz within a substrate containing polymers polarizable by an electromagnetic field having electrical resistivity, from an insulator to conductor or vice versa, modifiable by said field. The method involves dispersing in the substrate particles having a sandwich structure including two conductive layers and a layer with piezoelectric characteristics in the middle.
    Type: Application
    Filed: October 9, 2012
    Publication date: September 18, 2014
    Applicant: SPF LOGICA S.R.L.
    Inventors: Giorgio Eberle, Fabio Cappelli, Giuseppe Paronetto
  • Patent number: 8837877
    Abstract: A patterned nonreciprocal optical resonator structure is provided that includes a resonator structure that receives an optical signal. A top cladding layer is deposited on a selective portion of the resonator structure. The top cladding layer is patterned so as to expose the core of the resonator structure defined by the selective portion. A magneto-optically active layer includes a magneto-optical medium being deposited on the exposed core of the resonator structure so as to generate optical non-reciprocity.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: September 16, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Lionel C. Kimerling, Caroline A. Ross, Lei Bi, Peng Jiang, Juejun Hu, Dong Hun Kim, Gerald F. Dionne
  • Publication number: 20140248424
    Abstract: When mirror polishing is performed on a glass substrate by bringing a polishing pad into contact with the surface of the glass substrate while supplying a polishing liquid containing polishing grains to the substrate surface, the pH of the polishing liquid is maintained within a certain range or the agglomeration degree or dispersion degree of the polishing liquid is controlled. Consequently, an adequate mirror polishing rate can be maintained and there can be obtained a glass substrate having a good end shape.
    Type: Application
    Filed: May 12, 2014
    Publication date: September 4, 2014
    Applicant: HOYA CORPORATION
    Inventors: Toshio TAKIZAWA, Takumi KOSHIMIZU, Yoshinori MARUMO, Masahiro KATAGIRI
  • Patent number: 8795763
    Abstract: A track shield structure is disclosed that enables higher track density to be achieved in a patterned track medium without increasing adjacent track erasure and side reading. This is accomplished by placing a soft magnetic shielding structure in the space that is present between the tracks in the patterned medium. A process for manufacturing the added shielding structure is also described.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: August 5, 2014
    Assignee: Headway Technologies, Inc.
    Inventors: Yuchen Zhou, Lijie Guan, Kunliang Zhang
  • Patent number: 8795764
    Abstract: An apparatus includes a substrate and a magnetic layer coupled to the substrate. The magnetic layer includes an alloy that has magnetic hardness that is a function of the degree of chemical ordering of the alloy. The degree of chemical ordering of the alloy in a first portion of the magnetic layer is greater than the degree of chemical ordering of the alloy in a second portion of the magnetic layer, and the first portion of the magnetic layer is closer to the substrate than the second portion of the magnetic layer.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: August 5, 2014
    Assignee: Seagate Technology LLC
    Inventors: Yingguo Peng, Xiaowei Wu, Ganping Ju, Bin Lu
  • Patent number: 8790526
    Abstract: A method of producing bit-patterned media is provided whereby a shell structure is added on a bit-patterned media dot. The shell may be an antiferromagnetic material that will help stabilize the magnetization configuration at the remanent state due to exchange coupling between the dot and its shell. Therefore, this approach also improves the thermal stability of the media dot and helps each individual media dot maintain a single domain state.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 29, 2014
    Assignee: Seagate Technology LLC
    Inventors: Kaizhong Gao, Haiwen Xi, Song Xue
  • Publication number: 20140153139
    Abstract: According to one embodiment, a method of manufacturing a magnetoresistive element includes a layered structure and a pair of electrodes, the layered structure including a cap layer, a magnetization pinned layer, a magnetization free layer, a spacer layer and a functional layer provided in the magnetization pinned layer, between the magnetization pinned layer and the spacer layer, between the spacer layer and the magnetization free layer, in the magnetization free layer, or between the magnetization free layer and the cap layer and including an oxide, the method including forming a film including a base material of the functional layer, performing an oxidation treatment on the film using a gas containing oxygen in a form of at least one selected from the group consisting of molecule, ion, plasma and radical, and performing a reduction treatment using a reducing gas on the film after the oxidation treatment.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 5, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko TAKEO, Yoshihiko FUJI, Hiromi YUASA, Michiko HARA, Shuichi MURAKAMI, Hideaki FUKUZAWA
  • Patent number: 8734894
    Abstract: A method of depositing material onto a base portion of a wafer is disclosed. The method includes forming a bevel into a portion of a surface of the base portion of the wafer and depositing a first layer of conductive material onto the beveled portion of the base portion so that part of the first layer includes a wedge shape above the surface of the base portion. A second layer of conductive material is deposited onto the base portion including the portion of the base portion onto which the first layer of material is deposited.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: May 27, 2014
    Assignee: Seagate Technology LLC
    Inventors: David Chris Seets, Chang Xie, Christopher J. Cote, Karen Virginia Rud
  • Publication number: 20140138570
    Abstract: A composite particle includes: a particle composed of a soft magnetic metallic material, and a coating layer composed of a soft magnetic metallic material having a different composition from that of the particle and fusion-bonded to the particle so as to cover the particle, wherein when the Vickers hardness of the particle is represented by HV1 and the Vickers hardness of the coating layer is represented by HV2, HV1 and HV2 satisfy the following relationship: 100?HV1?HV2, and when half of the projected area circle equivalent diameter of the particle is represented by r and the average thickness of the coating layer is represented by t, r and t satisfy the following relationship: 0.05?t/r?1.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventors: Isamu OTSUKA, Yu MAETA, Toshikuni SATO
  • Publication number: 20140141224
    Abstract: In some embodiments, the present disclosure pertains to methods of making carbon foams. In some embodiments, the methods comprise: (a) dissolving a carbon source in a superacid to form a solution; (b) placing the solution in a mold; and (c) coagulating the carbon source in the mold. In some embodiments, the methods of the present disclosure further comprise a step of washing the coagulated carbon source. In some embodiments, the methods of the present disclosure further comprise a step of lyophilizing the coagulated carbon source. In some embodiments, the methods of the present disclosure further comprise a step of drying the coagulated carbon source. In some embodiments, the methods of the present disclosure also include steps of infiltrating the formed carbon foams with nanoparticles or polymers. Further embodiments of the present disclosure pertain to the carbon foams formed by the aforementioned methods.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 22, 2014
    Applicant: William Marsh Rice University
    Inventors: Matteo Pasquali, Tien Yi Theresa Hsu Whiting, Francesca Mirri, Bryan Thomas Whiting
  • Patent number: 8715776
    Abstract: Simultaneous setting of exchange pinning field magnetization in more than one direction for several thin film structures on a single substrate has been achieved by first orienting the structures as needed. A layer of hard magnetic material is then deposited, suitably patterned to control the direction of its flux, and then magnetized through a single exposure to a strong magnetic field. The assemblage is then thermally annealed (in the absence of any applied field) at a temperature higher than the AFM material blocking temperature, following which the thin film structures are magnetically pinned in the intended directions.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: May 6, 2014
    Assignee: Headway Technologies, Inc.
    Inventors: Yimin Guo, Grace Gorman
  • Patent number: 8697260
    Abstract: A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO2) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: April 15, 2014
    Assignee: Seagate Technology LLC
    Inventors: Zhong Stella Wu, Samuel Dacke Harkness, IV, Mariana R. Munteanu, Qixu Chen, Connie Chunling Liu
  • Patent number: 8685491
    Abstract: According to one embodiment, a method of manufacturing a magnetoresistive element includes a layered structure and a pair of electrodes, the layered structure including a cap layer, a magnetization pinned layer, a magnetization free layer, a spacer layer and a functional layer provided in the magnetization pinned layer, between the magnetization pinned layer and the spacer layer, between the spacer layer and the magnetization free layer, in the magnetization free layer, or between the magnetization free layer and the cap layer and including an oxide, the method including forming a film including a base material of the functional layer, performing an oxidation treatment on the film using a gas containing oxygen in a form of at least one selected from the group consisting of molecule, ion, plasma and radical, and performing a reduction treatment using a reducing gas on the film after the oxidation treatment.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: April 1, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiko Takeo, Yoshihiko Fuji, Hiromi Yuasa, Michiko Hara, Shuichi Murakami, Hideaki Fukuzawa
  • Patent number: 8679577
    Abstract: A magnetic tunnel junction cell having a free layer, a ferromagnetic pinned layer, and a barrier layer therebetween. The free layer has a central ferromagnetic portion and a stabilizing portion radially proximate the central ferromagnetic portion. The construction can be used for both in-plane magnetic memory cells where the magnetization orientation of the magnetic layer is in the stack film plane and out-of-plane magnetic memory cells where the magnetization orientation of the magnetic layer is out of the stack film plane, e.g., perpendicular to the stack plane.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: March 25, 2014
    Assignee: Seagate Technology LLC
    Inventors: Kaizhong Gao, Haiwen Xi
  • Patent number: 8663493
    Abstract: Provided is an oriented piezoelectric material with satisfactory sintering property free of Pb that is a hazardous substance, and a water-soluble alkaline ion, and a production method therefor. To this end, provided is a compound, including a tungsten bronze structure metal oxide, in which: the tungsten bronze structure metal oxide contains at least metal elements of Ba, Bi, Ca, and Nb, the metal elements satisfying the following conditions in terms of molar ratio; and has a C-axis orientation. The compound shows Ba/Nb=a: 0.363<a<0.399, Bi/Nb=b: 0.0110<b<0.0650, and Ca/Nb=c: 0.005<c<0.105. The tungsten bronze structure metal oxide preferably includes (1?x).Ca1.4Ba3.6Nb10O30?x.Ba4Bi0.67Nb10O30 (0.30?x?0.95).
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: March 4, 2014
    Assignees: Canon Kabushiki Kaisha, University of Yamanashi
    Inventors: Takanori Matsuda, Takayuki Watanabe, Hiroshi Saito, Nobuhiro Kumada
  • Patent number: 8637156
    Abstract: Layers of a passivating material and/or containing luminescent centers are deposited on phosphor particles or particles that contain a host material that is capable of capturing an excitation energy and transferring it to a luminescent center or layer. The layers are formed in an ALD process. The ALD process permits the formation of very thin layers. Coated phosphors have good resistance to ambient moisture and oxygen, and/or can be designed to emit a distribution of desired light wavelengths.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: January 28, 2014
    Inventors: Alan W. Weimer, Steven M. George, Karen J. Buochler, Joseph A. Spencer, II, Jarod McCormick
  • Patent number: 8617643
    Abstract: A method of producing a nanoscale structure having substantially immobilized nanoparticles arranged at a predetermined patterned is generally disclosed. First, a curable polymeric solution is placed within a well defined by a wafer. The curable polymeric solution includes a curable polymeric material and a magnetically coated nanoparticle. The well is positioned adjacent to an atomically-smooth medium. A recording head is moved in a predetermined manner to produce a magnetic field profile that substantially immobilizes the magnetically coated nanoparticle within the curable polymeric solution in the well. The curable polymeric solution is cured such that the magnetically coated nanoparticle remains substantially immobilized after the magnetic field profile is removed.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: December 31, 2013
    Assignee: University of South Carolina
    Inventor: Thomas M. Crawford
  • Patent number: 8609179
    Abstract: Apparatuses, methods and systems for applying a coating to an ear of corn in a high throughput manner are disclosed. The system includes means for moving the ear of corn through the system and means for coating the ear of corn with a coating while passing through the system. The apparatus includes a carrying position for an ear of corn, an automated line having a plurality of the carrying positions, and an automated coating station adapted to apply a coating to the ear of corn on the automated line. The method includes staging a plurality of ears of corn on an automated line, passing the automated line through an ear coating process, and coating the plurality of ears of corn with a coating.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: December 17, 2013
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: David Kurth, Thomas Edwin Arneson, Kirk David Shirar
  • Patent number: 8609184
    Abstract: A system and method for corrosion problems in magnetic media resulting from moisture penetrating through the carbon layer into the magnetic layer by diffusion or other methods are overcome by processing the carbon overcoat to stop and/or inhibit the moisture penetration. The process involves removing moisture channels from protective overcoats of thin film magnetic media by irradiating the protective overcoat with ultraviolet (UV) radiation in an inert hydrophobic chemical environment. Afterwards, the thin film magnetic media can be removed into ambient atmosphere where it is coated with a lubricant.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: December 17, 2013
    Assignee: Seagate Technology LLC
    Inventors: Jianwei Liu, Michael J. Stirniman, Li-Peng Wang
  • Publication number: 20130320969
    Abstract: A magnetic field sensor having a first magnetic sensor core for measuring a magnetic field in a first measuring direction, and a second magnetic sensor core for measuring a magnetic field in a second measuring direction, the first and second magnetic sensor cores having a shared magnetic anisotropy.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 5, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventors: Frank REICHENBACH, Paul FARBER, Frederic Njikam NJIMONZIE, Frank SCHATZ, Christian PATAK, Stefan WEISS, Joerg MARKTANNER
  • Patent number: 8597723
    Abstract: A perpendicular magnetic recording disk having a single domain exchange-coupled laminated soft magnetic underlayer (SUL) is disclosed. The SUL is a combination synthetic anti-parallel coupled SUL structure, which has the product (Mst) of saturation magnetization and film thickness of the middle ferromagnetic layer less than the sum of the Mst of the bottom and top ferromagnetic layers. Subjected to a post radial field reset process, this SUL provides single domain state. Moreover, both robustness of stray fields and low permeability are obtained while keeping excellent corrosion resistance and cost effective manufacturability.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: December 3, 2013
    Assignee: WD Media, LLC
    Inventors: Hong-Sik Jung, Emur M. Velu, Sudhir S. Malhotra, Jackie Tsoi Jung, Gerardo A. Bertero
  • Patent number: 8590139
    Abstract: A method according to embodiments of the present invention comprises providing a magnetic stack comprising a magnetic layer sub-stack comprising magnetic layers and a bottom conductive electrode and a top conductive electrode electrically connecting the magnetic layer sub-stack at opposite sides thereof; providing a sacrificial pillar on top of the magnetic stack, the sacrificial pillar having an undercut with respect to an overlying second sacrificial material and a sloped foot with increasing cross-sectional dimension towards the magnetic stack, using the sacrificial pillar for patterning the magnetic stack, depositing an insulating layer around the sacrificial pillar, selectively removing the sacrificial pillar, thus creating a contact hole towards the patterned magnetic stack, and filling the contact hole with electrically conductive material.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: November 26, 2013
    Assignees: IMEC, Katholieke Universiteit Leuven, K.U. Leuven R&D
    Inventors: Maria Op De Beeck, Liesbet Lagae, Sven Cornelissen
  • Patent number: 8586136
    Abstract: A method of manufacturing a magnetic recording medium with high recording density and enabling stable flight of a magnetic head, with high manufacturing yields, is provided. The method includes layering a magnetic layer, a protective layer, and a lubricating layer in order on a substrate, and forming a medium for transfer. The method further includes transferring a magnetic pattern to the medium for transfer, and flattening a surface of the lubricating layer of the medium for transfer for which the magnetic pattern transferring is completed. The surface of the lubricating layer is flattened either by wiping the surface of the lubricating layer using a member without a cutting effect, or by heating the surface of the lubricating layer.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: November 19, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Narumi Sato
  • Publication number: 20130293225
    Abstract: A magnetic sensor has a bottom shield layer, an upper shield layer, and a sensor stack adjacent the upper shield layer. The sensor includes a seed layer between the bottom shield layer and an antiferromagnetic layer of the sensor stack. The seed layer has a magnetic layer adjacent the sensor stack and a nonmagnetic layer adjacent the bottom shield layer.
    Type: Application
    Filed: December 15, 2011
    Publication date: November 7, 2013
    Applicant: Seagate Technology LLC
    Inventors: Eric Walter Singleton, Antonia Tsoukatos, Liwen Tan, Jae-Young Yi
  • Publication number: 20130287938
    Abstract: A process for producing a glass substrate for magnetic disk through chemical strengthening operation, in which the distribution of compressive stress is uniformed at a surface layer portion. The chemical strengthening operation includes the first step of bringing the glass substrate into contact with a first treatment solution (chemical strengthening treatment solution) containing first ions with an ionic radius larger than those of ions within the glass substrate and either the second and subsequent steps of bringing the platy glass into contact with treatment solutions containing second and subsequent bivalent ions, or the second and subsequent steps of bringing the glass substrate into contact with second and subsequent chemical strengthening treatment solutions containing second and subsequent ions exhibiting an ion exchange rate with ions within the glass substrate greater than that of the first ions to thereby decelerate the ion exchange.
    Type: Application
    Filed: July 2, 2013
    Publication date: October 31, 2013
    Inventor: Hideki ISONO
  • Patent number: 8568830
    Abstract: The invention concerns a method for manufacturing pipes coated with a peelable protection layer, wherein the core pipe (1) is produced by extruding and calibrating, after which the surface of core pipe (1) is heated before a protecting coating layer (7a) is applied onto the core pipe (1) on passing through a coating die (7), followed by cooling the applied coating layer (7a) before the readily coated pipe (9) is drawn out of the process. The method is characterized in that the degree of adhesion between core pipe (1) and coating layer (7a) is controlled by rapid and effective heating of the surface of the core pipe (1) to a predetermined temperature and by controlling welding time and stretching of the coating layer being applied onto the core pipe (1) by maintaining a controlled vacuum level inside the coating die (7) forcing the coating layer to hit the surface of the core pipe at an angle as steep as possibly, preferably between 45 and 90 degrees, most preferably between 60 and 80 degrees.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: October 29, 2013
    Assignee: Oy KWH Pipe Ab
    Inventors: Mikael Finne, Jonas Holmlund, Charlotta Risku, Stefan Slotte
  • Publication number: 20130266740
    Abstract: A data device may have at least a magnetic lamination with a thermal retention structure deposited on a substrate and configured to maintain a predetermined temperature for a predetermined amount of time. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 10, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Yukiko Kubota
  • Publication number: 20130260179
    Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the nonmagnetic layer has a thickness of equal to or less than 300 nm; a composite elastic modulus as measured on a surface of the magnetic layer ranges from 6.0 to 8.0 GPa; the magnetic layer comprises an abrasive with a specific surface area by BET method ranging from 14 m2/g to 40 m2/g; and a surface abrasive occupancy on a surface of the magnetic layer ranges from 0.2% to 2%.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 3, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Norihito KASADA, Masahide SATO, Isamu WATANABE
  • Publication number: 20130260027
    Abstract: Provided are: a method for manufacturing a glass substrate for a magnetic disk by using an alternative abrasive having the same polishing performance as cerium oxide, which has conventionally been used as an abrasive for polishing principal faces of glass substrates for magnetic disks; and a method for manufacturing a magnetic disk. At the time of polishing a principal face of a magnetic disk glass substrate by using a slurry, the disclosure employs a slurry containing: an abrasive made of granular zirconia; a first additive including a phosphate and/or a sulfonate; and a second additive including a re-aggregation inhibitor.
    Type: Application
    Filed: December 29, 2011
    Publication date: October 3, 2013
    Applicant: HOYA CORPORATION
    Inventors: Kyosuke IIIzumi, Yoshihiro Tawara, Kotaro Yoshimaru
  • Publication number: 20130243699
    Abstract: The design of biodegradable magnetic nanoparticles for use in in-vivo biomedical applications. The particles can include Fe in combination with one or more of Mg, Zn, Si, C, N, and P atoms or other particles. The nanoparticles can be degraded in-vivo after usage. The nanoparticles can cease heating upon reaching a predetermined temperature or other value.
    Type: Application
    Filed: December 7, 2012
    Publication date: September 19, 2013
    Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Jian-Ping Wang, Ying Jing, Shihai He
  • Publication number: 20130240427
    Abstract: The invention relates to a component (30) for a filter unit for filtering fluids, in particular hydraulic fluids, comprising at least in areas an insertion or application of magnetisable and/or magnetised particles, whereby, using a simplified design, a magnetic separation of contaminants in a fluid flowing through a filter unit is achieved. The component can be in the form of a film (30) and can be an externally or circumferentially arranged support means for a filter element (10). In the manufacture of the component (30), said component is provided at least in areas with an insertion and/or application of magnetisable and/or magnetised particles.
    Type: Application
    Filed: August 11, 2011
    Publication date: September 19, 2013
    Inventors: Jessica Parino, Michael Sakraschinsky
  • Patent number: 8536270
    Abstract: To provide a resist composition including: at least one polymerizable compound having a viscosity of 100 mPa·s or less at 25° C.; a fluorine-containing compound A having a viscosity of 5,000 mPa·s or greater at 25° C., and a fluorine content of 10% by mass or greater; and a fluorine-containing compound B having a viscosity of 2,000 mPa·s or less at 25° C., and a fluorine content of 10% by mass or greater.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: September 17, 2013
    Assignee: FujiFilm
    Inventor: Tadashi Omatsu
  • Patent number: 8529989
    Abstract: 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
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: September 10, 2013
    Assignee: Showa Denko K.K.
    Inventors: Gohei Kurokawa, Yuzo Sasaki
  • Publication number: 20130227943
    Abstract: Methods of applying sensible coatings with at least one spatially-varying characteristic to shape memory alloy actuators, particularly actuators comprising linear elements such as wires strips or cables, are disclosed. Such coatings enable the positions of the linear shape memory alloy elements to be sensed using magnetic, capacitive and optical sensors and so, in conjunction with a controller, enable operation of such actuators under proportional control.
    Type: Application
    Filed: March 5, 2012
    Publication date: September 5, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Andrew M. Mance, Martin P. Sulic
  • Publication number: 20130206722
    Abstract: A method of producing bit-patterned media is provided whereby a shell structure is added on a bit-patterned media dot. The shell may be an antiferromagnetic material that will help stabilize the magnetization configuration at the remanent state due to exchange coupling between the dot and its shell. Therefore, this approach also improves the thermal stability of the media dot and helps each individual media dot maintain a single domain state.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 15, 2013
    Applicant: SEAGATE TECHNOLOGY, LLC
    Inventor: Seagate Technology, LLC
  • Patent number: 8499435
    Abstract: A thin-film magnetic head is constructed such that a main magnetic pole layer, a lower shield layer, an upper shield layer and a thin-film coil are laminated on a substrate. A method of manufacturing the thin-film magnetic head has a lower shield layer forming step. This step comprises a step of forming a first lower shield part in a lower shield planned area, including a planned line along the medium-opposing surface, a step of forming a partial lower seed layer having a partial arrangement structure in which the partial lower seed layer is arranged on a lower formation zone except a lower exception zone including the planned line, a step of forming a second lower shield part on the partial lower seed layer.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: August 6, 2013
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Shigeki Tanemura, Kazuki Sato, Atsushi Iijima
  • Patent number: 8474128
    Abstract: A method is provided for forming a plurality of regions of magnetic material in a substrate having a first approximately planar surface. The method comprises the steps of fabricating projections in the first surface of the substrate, depositing onto the first surface a magnetic material in such a way that the tops of the projections are covered with magnetic material, and depositing filler material atop the substrate so produced. The filler material may then be planarized, for example by chemical-mechanical polishing. In an alternative embodiment magnetic material is deposited on a substrate and portions of it are removed, leaving islands of material. Filler material is then deposited, which may be planarized.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: July 2, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Zvonimir Z. Bandic, Elizabeth Ann Dobisz, Jui-Lung Li, Henry Hung Yang
  • Publication number: 20130164564
    Abstract: An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises: adding a compound to a water-based magnetic liquid, wherein the water-based magnetic liquid comprises magnetic particles dispersed in an acidic water-based solvent, and the compound is selected from the group consisting of amine compounds, aromatic compounds, and aliphatic compounds having one or more monovalent phosphorus polar groups denoted by: wherein m1 denotes 0 or 1, m2 denotes 1 or 2, and M denotes a hydrogen atom or an alkali metal atom; and then collecting the magnetic particles from the water-based magnetic liquid to obtain the magnetic particles the surfaces of which have been modified by being coated with the compound.
    Type: Application
    Filed: December 26, 2012
    Publication date: June 27, 2013
    Applicant: FUJIFILM CORPORATION
    Inventor: FUJIFILM Corporation
  • Publication number: 20130164563
    Abstract: An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises adding a carboxylic acid compound to a water-based magnetic liquid, wherein the water-based magnetic liquid comprises magnetic particles dispersed in an acidic water-based solvent, and the carboxylic acid compound is selected from the group consisting of aromatic compounds and aliphatic compounds having one or more carboxylic acid (salt) groups denoted by: —COOM wherein M denotes a hydrogen atom or an alkali metal atom, when the number of the carboxylic acid (salt) group contained within the molecule thereof is 1, the number of carbon atoms, excluding the carboxylic acid (salt) group portion, ranges from 1 to 13; and then collecting the magnetic particles from the water-based magnetic liquid to obtain the magnetic particles the surfaces of which have been modified by being coated with the carboxylic acid compound.
    Type: Application
    Filed: December 26, 2012
    Publication date: June 27, 2013
    Applicant: FUJIFILM CORPORATION
    Inventor: FUJIFILM Corporation
  • Publication number: 20130162064
    Abstract: Disclosed herein is a laminated core used for a motor such as an electric motor, including: a unit laminate laminated in at least one layer and formed of a soft magnetic composite, wherein each powder particle forming the soft magnetic composite is insulation-coated. The preferred embodiments of the present invention can improve the mechanical strength of the core of the soft magnetic composite by manufacturing the core using the laminating method of the soft magnetic composite and reduce core loss by performing insulation coating on powder particles forming the soft magnetic composite.
    Type: Application
    Filed: February 29, 2012
    Publication date: June 27, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Changsung Sean Kim, Guen Hong Lee, Han Kyung Bae, Chang Hwan Choi, Ji Hye Shim
  • Patent number: 8470391
    Abstract: A method for manufacturing discrete track media and patterned media is disclosed which enables a magnetic recording layer having excellent magnetic characteristics to be obtained without imparting damage to a crystal orientation control layer which is at the surface when forming the magnetic recording layer. The method for manufacturing magnetic recording media comprises a process of forming a soft magnetic layer on a substrate; a process of forming a first crystal orientation control layer on the soft magnetic layer; a process of providing a depression in at least a portion of the first crystal orientation control layer; a process of performing heat treatment of the first crystal orientation control layer; and a process of forming a magnetic recording layer on the first crystal orientation control layer.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: June 25, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Shinji Uchida
  • Publication number: 20130149559
    Abstract: An apparatus and associated method may be used to provide a data sensing element capable of detecting changes in magnetic states. Various embodiments of the present invention are generally directed to a magnetically responsive lamination of layers and [a] means for generating a high magnetic moment region proximal to an air bearing surface (ABS) and a low magnetic moment region proximal to a hard magnet.
    Type: Application
    Filed: February 6, 2013
    Publication date: June 13, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Seagate Technology LLC
  • Publication number: 20130135070
    Abstract: There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of boosting productivity by improving thickness accuracy of a green sheet. In the method, magnet material is milled into magnet powder, and the magnet powder and a binder are mixed to obtain a mixture including 1 to 40 wt % of the binder therein. Next, by high precision coating of a substrate with the mixture, a green sheet is obtained at thickness precision within a margin of error of plus or minus 5% with reference to a designed value. Thereafter, the green sheet is held for predetermined time at binder decomposition temperature in non-oxidizing atmosphere, whereby depolymerization reaction or the like changes the binder into monomer and thus removes the binder. The green sheet with the binder removed therefrom undergoes pressure sintering such as SPS method so as to obtain a permanent magnet 1.
    Type: Application
    Filed: March 15, 2012
    Publication date: May 30, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Izumi Ozeki, Katsuya Kume, Toshiaki Okuno, Takashi Ozaki, Tomohiro Omure, Keisuke Taihaku
  • Publication number: 20130130064
    Abstract: An aspect of the present invention relates to an alumina dispersion, which is employed to manufacture a particulate magnetic recording medium, comprises alumina, a solvent, and a dispersing agent in the form of an aromatic hydrocarbon compound having a phenolic hydroxyl group, and essentially does not comprise ferromagnetic powder.
    Type: Application
    Filed: November 20, 2012
    Publication date: May 23, 2013
    Applicant: FUJIFILM CORPORATION
    Inventor: Fujifilm Corporation
  • Publication number: 20130108891
    Abstract: An aspect of the present invention relates to a method of manufacturing magnetic powder, which comprises adding an alkali metal salt compound comprising a substituent selected from the group consisting of an alkali metal salt of a carboxyl group and an alkali metal salt of a hydroxyl group to a water-based magnetic liquid comprising magnetic particles dispersed in an acidic water-based solvent to cause the magnetic particles to aggregate in the water-based magnetic liquid; and collecting the aggregated magnetic particles to obtain the magnetic powder.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 2, 2013
    Applicant: FUJIFILM CORPORATION
    Inventor: FUJIFILM CORPORATION