Applying Superposed Diverse Coating Or Coating A Coated Base Patents (Class 427/131)
  • Publication number: 20090130492
    Abstract: Information storage devices and methods of manufacturing the same are provided. An information storage device includes a magnetic layer formed on an underlayer. The underlayer has at least one first region and at least one second region. The first and second regions have different crystallinity characteristics. The magnetic layer has at least one third region formed on the at least one first region and at least one fourth region formed on the at least one second region. The third and fourth regions have different magnetic anisotropic energy constants.
    Type: Application
    Filed: May 6, 2008
    Publication date: May 21, 2009
    Inventors: Sung-chul Lee, Sun-ae Seo, Young-jin Cho, Chang-won Lee
  • Publication number: 20090122449
    Abstract: A magnetic write head includes a main pole, a return yoke forming a magnetic path with the main pole, a side shield formed at both sides of the main pole, and a shield gap layer formed between the side shield and the return yoke. The side shield and the return yoke have portions connected to each, and are separated from each other by the shield gap layer in an area except for the portions which contact. A first gap layer formed of a nonmagnetic insulation material is formed between both sides of the main pole and the side shield. A gap is formed between an end portion of the main pole and an end portion of the return yoke and a second gap layer is formed in the gap with a nonmagnetic insulation material.
    Type: Application
    Filed: July 8, 2008
    Publication date: May 14, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yong-su KIM, Kook-hyun SUNWOO, Kyoung-won NA
  • Publication number: 20090117355
    Abstract: The present invention provides a ferromagnetic/antiferromagnetic coupling film structure and a fabrication method thereof. The structure includes an antiferromagnetic layer of cobalt oxide having a thickness of 2 to 15 monolayers and formed on a substrate at a temperature ranging from 700K to 900K; and a ferromagnetic layer of cobalt having a thickness of at least one monolayer for being formed on the antiferromagnetic layer of cobalt oxide.
    Type: Application
    Filed: July 31, 2008
    Publication date: May 7, 2009
    Inventors: Jyh-Shen Tsay, Chi-Wei Lee, Gung Chern
  • Publication number: 20090117409
    Abstract: A perpendicular magnetic recording medium and a method of manufacturing the same are provided. The perpendicular magnetic recording medium includes a substrate, and a recording layer comprising a plurality of independent first magnetic body regions and a plurality of second magnetic body regions formed on the substrate, the second magnetic body regions separating the first magnetic body regions from each other, and being formed by implanting dopant into a region in which the first magnetic body regions are to be separated. Each of the first magnetic body regions has an L10 structure and the dopant has an ionic or molecular shape.
    Type: Application
    Filed: May 9, 2008
    Publication date: May 7, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hoo-san LEE, Hoon-sang Oh
  • Publication number: 20090115405
    Abstract: An integrated angular magnetic sensor apparatus for determining a magnetic field angle within two axes of a plane is formed on a substrate onto which two anisotropic magneto-resistive sensing elements and at least one magneto-resistive sensing element are fabricated. The two anisotropic magneto-resistive sensing elements are oriented such that the output voltages of a first and second of the anisotropic magneto-resistive sensing elements are a function of a first and second trigonometric function (a sine function) of the magnetic field angle to a reference axis. The at least one magneto-resistive sensing element on the substrate and having a fixed reference magnetization oriented with respect to the reference axis such that an output voltage of the at least one magneto-resistive sensing element provides a quadrant indicator for the magnetic field angle with respect to the reference axis. The quadrant indicator is a trigonometric function such as a sine or cosine function.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 7, 2009
    Inventors: Yimin Guo, Grace Gorman
  • Publication number: 20090104346
    Abstract: A longitudinal magnetic recording medium comprising at least four magnetic layers including a substrate, a CoCrTa magnetic intermediate layer on the substrate, wherein the CoCrTa magnetic intermediate layer comprises Cr <16 at % and Ta <6 at %, a first CoCrPtB magnetic layer on the CoCrTa layer, wherein the first CoCrPtB magnetic layer comprises Cr: 10-14%, Pt: 4-8 at %, B: 6-10%, a second CoCrPtB magnetic layer on the first CoCrPtB magnetic layer, and a third CoCrPtB magnetic layer on the second CoCrPtB layer, wherein the third CoCrPtB magnetic layer comprises Cr: 12-16 at %, Pt: 12-16 at %, B: 10-14 at % and has <10 at % Cr than that in the second CoCrPtB magnetic layer is disclosed.
    Type: Application
    Filed: November 13, 2008
    Publication date: April 23, 2009
    Applicant: Seagate Technology LLC
    Inventors: Li-Lien Lee, Michael Z. Wu, Shanghsien S. Rou
  • Patent number: 7514118
    Abstract: A method of plating on a glass substrate allowing an electroless plating film with good adhesiveness to be formed by chemically bonding a silane coupling agent in a state of simple adhesion or hydrogen bond to the surface of the glass substrate through dehydration condensation reaction, and a method of manufacturing a magnetic recording medium using the plating method. In the plating method, electroless plating is performed on a glass substrate after sequentially conducting at least the adhesion layer formation that forms an adhesion layer using a silane coupling agent solution, catalyst layer formation, a catalyst activation, and a drying that chemically bonds the silane coupling agent in the adhesion layer to the surface of the glass substrate.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: April 7, 2009
    Assignee: Fuji Electric Device Technology Co., Ltd.
    Inventors: Akira Iso, Youichi Tei
  • Publication number: 20090086372
    Abstract: Embodiments of the present invention help to provide a discrete track medium for realizing a high track density in a low price by adopting a configuration, in which filling of a non-magnetic material into a guard band portion and smoothing processing of a medium surface are not required. According to one embodiment, a perpendicular magnetic recording medium, on the non-magnetic substrate, includes at least: a soft magnetic underlayer; a first recording layer including a crystal grain having a magnetic property and a non-magnetic grain boundary having an oxide, as a main component, surrounding the crystal grain; a second recording layer containing a ferromagnetic metal as a main component and not containing an oxide; and at least one non-magnetic layer provided between the first recording layer and the second recording layer.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Inventors: Takayuki Ichihara, Masayoshi Shimizu
  • Publication number: 20090081483
    Abstract: A magnetic disk 10 for use in perpendicular magnetic recording, which includes an underlayer 18, a size-reduction promoting layer 20 (nonmagnetic granular layer) of a granular structure, and a magnetic recording layer 22 having a ferromagnetic layer 32 of a granular structure. The size-reduction promoting layer 20 has an inorganic oxide matrix and nonmagnetic metal crystal grains and is disposed between the underlayer 18 and the ferromagnetic layer 32, thereby reducing the size of magnetic crystal grains in the ferromagnetic layer 32.
    Type: Application
    Filed: March 20, 2006
    Publication date: March 26, 2009
    Applicant: HOYA CORPORATION
    Inventors: Yoshiaki Sonobe, Teiichiro Umezawa, Kong Kim, Masaki Uemura
  • Patent number: 7504135
    Abstract: A method of fabricating a diffusion barrier using a gas cluster ion beam apparatus is disclosed. The method includes generating a metal-organic gas that includes a metal-organic compound that includes an element of cobalt (Co) or cobalt and iron (CoFe). The metal-organic gas is combined with a carrier gas that is supplied to the gas cluster ion beam apparatus (GCIB). The GCIB processes the carrier gas to form a beam of gas cluster ions that include the metal-organic compound. The beam irradiates an interface surface of a target material (e.g. an IrMn, PtMn, or MnFe antiferromagnetic layer) and at least a portion of the Co or CoFe remains in contact with the interface surface to form a barrier that prevents a diffusion of manganese (Mn).
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: March 17, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Janice H. Nickel
  • Patent number: 7504007
    Abstract: A thin soft magnetic film combines a high magnetization with an insulating character. The film is formed by nitriding Fe-rich ferromagnetic nanograins immersed in an amorphous substrate. A selective oxidation of the amorphous substrate is then performed. The result is a thin, insulating, soft magnetic film of high magnetization. Many types of integrated circuits can be made which include a component using a membrane incorporating the above-mentioned thin film.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: March 17, 2009
    Assignees: STMicroelectronics S.A., Commissariat a L'Energie Atomique
    Inventors: Guillaume Bouche, Pascal Ancey, Bernard Viala, Sandrine Couderc
  • Publication number: 20090068347
    Abstract: A method of forming a micromagnetic device including providing a substrate and forming a magnetic core layer over the substrate from a magnetic alloy. The magnetic alloy includes iron, cobalt and phosphorous. A content of the cobalt is in a range of 1.8 to 4.5 atomic percent. A content of the phosphorus is in a range of 20.1 to 30 atomic percent. A content of the iron is substantially a remaining proportion of the magnetic alloy.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 12, 2009
    Inventors: Ashraf W. Lotfi, Trifon M. Liakopoulos, Robert W. Filas
  • Patent number: 7500303
    Abstract: A read head for a disk drive and a method of fabricating the read head with overlaid lead pads that contact the top surface of the sensor between the hardbias structures to define the electrically active region of the sensor are described. The invention deposits the GMR and lead layers before milling away the unwanted material. A photoresist mask with a hole defining the active area of the sensor is preferably patterned over a layer of DLC that is formed into a mask. A selected portion of the exposed lead material is then removed using the DLC as a mask defining the active region of the sensor. A photoresist mask pad is patterned to define the full sensor width. The excess sensor and lead material exposed around the mask is milled away. The layers for the hardbias structure are deposited.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 10, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Tsung Yuan Chen, Kuok San Ho, Mustafa Michael Pinarbasi
  • Patent number: 7494686
    Abstract: A method for manufacturing a magnet patch tape to facilitate blood circulation in a restricted area of a human body is provided. The patch tape shows a number of stripes of anisotropic magnet field with 2 to 5 mm width and spaced 1 to 3 mm apart from each other when viewed through a magnetic field viewer.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: February 24, 2009
    Inventors: Jung Suk Suh, Kelly Lucas, Yong Ki Chong
  • Patent number: 7494726
    Abstract: A perpendicular medium is disclosed in which an isolation structure of an underlayer is formed using a simple method as in a conventional manufacturing process for a medium of continuous films. The method suppresses dispersion of alignment and reduced magnetic cluster size in a magnetic recording layer. The perpendicular medium exhibits high recording density owing to thin film thickness of the underlayer. A perpendicular magnetic recording medium includes at least an underlayer and a magnetic recording layer sequentially laminated on a nonmagnetic substrate. The underlayer consists of crystal grains and an amorphous grain boundary, and the crystal grain has a shape holding a relation (an area of a bottom region at an initial stage of growth)>(an area of a top region).
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: February 24, 2009
    Assignee: Fuji Electric Device Technology Co., Ltd.
    Inventors: Sadayuki Watanabe, Yasushi Sakai
  • Publication number: 20090045162
    Abstract: A thin film magnetic head has a configuration in which a main magnetic pole film having a magnetic pole end portion on a medium opposing surface (ABS) side facing a magnetic disk, a write shield film facing the magnetic pole end portion so as to form a recording gap film on the medium opposing surface side, and a thin film coil wound around at least a part of the write shield film are laminated. Further, the thin film magnetic head has an upper yoke magnetic pole film whose size is larger than that of the main magnetic pole film at a part more distant from the ABS than the recording gap film, and this upper yoke magnetic pole film is bonded to the side of the main magnetic pole film close to the thin film coil. In the upper yoke magnetic pole film, an end portion on the ABS side is retracted in a direction apart from the ABS in accordance with an increase in film thickness which is measured from the surface of the main magnetic pole film.
    Type: Application
    Filed: October 16, 2008
    Publication date: February 19, 2009
    Applicants: Headway Technologies, Inc., SAE Magnetics (H.K) Ltd.
    Inventors: Yoshitaka SASAKI, Hiroyuki Itoh, Takehiro Kamigama, Tatsushi Shimizu
  • Publication number: 20090047547
    Abstract: A method for fabricating a patterned disk of a hard disk drive. The method includes forming a layer of magnetic material over a substrate and then forming a sacrificial flash layer over the layer of magnetic material. A co-polymer material is formed over the sacrificial flash layer and then a plurality of magnetic dots separated by a non-magnetic material are formed in the magnetic layer. The flash layer is preferably a FePt material with a non-magnetic Ag or Cu based alloy. Such material not only provides good adhesion between the co-polymer and magnetic layers but also diffuses into the grains of the magnetic material. The diffusion of the non-magnetic flash layer between the grains of the magnetic material reduces magnetic cross-talk and improves the signal to noise ratio of the disk.
    Type: Application
    Filed: August 13, 2007
    Publication date: February 19, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sooyoul Hong, Carl(Xiao) Dong Che, Hyung Lee
  • Patent number: 7491418
    Abstract: A method of manufacturing a magnetic recording medium that exhibits high performance and high reliability includes forming a liquid lubricant layer capable of high coverage while retaining a film thickness of 1 nm to 2 nm. The magnetic recording medium includes an underlayer, a magnetic layer, a protective layer, and a liquid lubricant layer sequentially laminated or formed on a substrate. The liquid lubricant layer is formed by coating a liquid lubricant diluted with a solvent on the protective layer to a thickness of at least the surface roughness to form a thick film liquid lubricant layer, pressing a slide member against the surface of the liquid lubricant layer while rotating the medium to adhere the liquid lubricant onto the protective layer, and reducing the thickness of the liquid lubricant layer with a solvent that can dissolve the liquid lubricant to the medium surface.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: February 17, 2009
    Assignee: Fuji Electric Device Technology Co., Ltd.
    Inventor: Makoto Isozaki
  • Publication number: 20090042062
    Abstract: A magnetic recording medium having a substrate, an interlayer and a magnetic layer, the interlayer having at least a first intermediary layer, a second intermediary layer and a third intermediary layer, wherein the first intermediary layer or the third intermediary layer is non-magnetic or magnetic and the second intermediary layer has a hexagonal close pack crystal structure and a property of providing RKKY coupling between the first intermediary layer and the third intermediary layer when the first intermediary layer and the second intermediary layer are magnetic layers is disclosed.
    Type: Application
    Filed: July 1, 2008
    Publication date: February 12, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Erol Girt, Alex Rou, John Wang
  • Publication number: 20090021868
    Abstract: A laminated write pole layer for a PMR write head is disclosed in which a plurality of “n” magnetic layers and “n?1” non-magnetic spacers are formed in an alternating fashion on a substrate. The non-magnetic spacers promote exchange decoupling or antiferromagnetic coupling between adjacent magnetic layers. Writability is improved when the trailing magnetic layer has a thickness greater than the thickness of other magnetic layers and preferably >25% of the total thickness of the magnetic layers. The thicknesses of the other magnetic layers may be equal or may become progressively smaller with increasing distance from the trailing magnetic layer. In another embodiment, the non-magnetic spacer between the trailing magnetic layer and the nearest magnetic layer is replaced by a magnetic spacer made of a soft magnetic material to promote magnetic coupling and effectively increase the thickness of the trailing magnetic layer.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 22, 2009
    Inventors: Kenichi Takano, Lijie Guan, Yuchen Zhou, Joe Smyth, Moris Dovek
  • Publication number: 20090017198
    Abstract: A thin-film magnetic head has a laminated construction comprising a main pole layer having a magnetic pole tip on a side of the medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole tip forming a recording gap layer, on the side of the medium-opposing surface, and a thin-film coil wound around at least a portion of the write shield layer. The thin-film magnetic head has an upper yoke pole layer having a larger size than the portion of the main pole layer which is more distant from the medium-opposing surface than the recording gap layer, wherein the upper yoke pole layer is joined to the side of the main pole layer which is near the thin-film coil.
    Type: Application
    Filed: September 10, 2008
    Publication date: January 15, 2009
    Applicant: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Lijie Guan, Hiroyuki Ito, Dong Hong Li
  • Publication number: 20090017518
    Abstract: A magnetic particle and fabrication method thereof. The magnetic particle comprises a polymer core, a magnetic material layer covering the polymer core, and a silicon containing layer covering the magnetic material layer. In addition, the magnetic particle may further comprise a coupling agent on the silicon containing layer, and an active molecule connected to the coupling agent. The magnetic particles provide controllable size, uniform diameter distribution, high magnetization, improved storage stability, and modified surface for targeting biomolecules for biomaterial separation and environmental analysis.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 15, 2009
    Inventors: Kun Chan Wu, Hui-Ju Cho, Pei-Shin Jiang, Hsiang Yuan Huang, Wen-Hsun Kuo, Chi-Min Chau
  • Patent number: 7476414
    Abstract: There are provided a magnetoresistance effect element, a magnetic head, a magnetic head assembly and a magnetic recording system, which have high sensitivity and high reliability. The magnetoresistance effect element has two ferromagnetic layers, a non-magnetic layer provided between the ferromagnetic layers, and a layer containing an oxide or nitride as a principal component, wherein the layer containing the oxide or nitride as the principal component contains a magnetic transition metal element which does not bond to oxygen and nitrogen and which is at least one of Co, Fe and Ni.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: January 13, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideaki Fukuzawa, Katsuhiko Koi, Hiromi Fuke, Hiroshi Tomita, Hitoshi Iwasaki, Masashi Sahashi
  • Patent number: 7476413
    Abstract: Techniques for attaining high performance magnetic memory devices are provided. In one aspect, a magnetic memory device comprising one or more free magnetic layers is provided. The one or more free magnetic layers comprise a low magnetization material adapted to have a saturation magnetization of less than or equal to about 600 electromagnetic units per cubic centimeter. The device may be configured such that a ratio of mean switching field associated with an array of non-interacting magnetic memory devices and a standard deviation of the switching field is greater than or equal to about 20. The magnetic memory device may comprise a magnetic random access memory (MRAM) device. A method of producing a magnetic memory device is also provided.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: January 13, 2009
    Assignee: International Business Machines Corporation
    Inventor: David W. Abraham
  • Publication number: 20090011283
    Abstract: A perpendicular magnetic recording medium of the embodiments of the invention comprises a substrate, a hcp soft underlayer (SUL), and a magnetic layer, wherein the hcp SUL is adapted to create a [0002] growth orientation in the magnetic layer and to enhance a magnetic head field during writing of data to the magnetic layer; further wherein the perpendicular magnetic recording medium does not contain an interlayer (IL) that is different from the hcp SUL and provides a [0002] growth orientation in the magnetic layer.
    Type: Application
    Filed: March 1, 2007
    Publication date: January 8, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Erol Girt, Raj N. Thangaraj
  • Publication number: 20090004510
    Abstract: A substrate for perpendicular magnetic recording medium 2 is provided with a soft magnetic substrate coat 5. On this soft magnetic substrate coat 5, an anticorrosion coat 5 is formed. The anticorrosion coat 6 is preferably formed so as to completely cover the entire soft magnetic substrate coat 5.
    Type: Application
    Filed: August 25, 2005
    Publication date: January 1, 2009
    Applicant: SHOWA DENKO K.K.
    Inventor: Masahiro Ohmori
  • Publication number: 20080316648
    Abstract: A disk for a hard disk drive. The disk includes a first magnetic layer and a second magnetic layer. An intermediate layer consisting of cobalt and titanium is located between the first and second intermediate layers. The intermediate layer creates a finer grain size and larger crystalline anisotropy in the second magnetic layer, characteristics that are desirable when used with a perpendicular recording head.
    Type: Application
    Filed: June 19, 2007
    Publication date: December 25, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sooyoul Hong, Carl (Xiao) Dong Che
  • Publication number: 20080318087
    Abstract: Provided is a magnetic recording medium which causes a reduction of transition noises and has a high productivity, and a method of manufacture thereof. The method of manufacturing a magnetic recording medium, comprising: fixing a polymerization initiator on a support by microcontact printing, forming a grafted polymer pattern by bringing a compound having a polymerizable unsaturated bond into contact with the polymerization initiator fixed on the support followed by graft polymerization of the compound, and forming a magnetic region by coating, onto the pattern, an alloy-particle-containing liquid which contains alloy particles capable of forming a CuAu pattern or Cu3Au pattern ferromagnetic ordered alloy, and further subjecting the resultant to annealing processing, thereby forming a plurality of magnetic regions physically independent of each other.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 25, 2008
    Applicant: FUJIFILM CORPORATION
    Inventors: Yasushi HATTORI, Koichi Kawamura
  • Publication number: 20080305366
    Abstract: A magnetic recording tape configured for increased surface lubricity includes an elongated substrate and a magnetic side disposed on the substrate. The magnetic side includes a magnetic recording layer defining an exposed magnetic recording surface opposite the substrate, and a support layer deposited on the substrate between the substrate and the magnetic recording layer. The support layer includes nano-particles configured to release lubrication to the exposed magnetic recording surface. In this regard, the support layer configures the exposed magnetic recording surface to have a surface lubrication to total lubrication ratio (SL ratio) of greater than about 5%.
    Type: Application
    Filed: June 8, 2007
    Publication date: December 11, 2008
    Inventors: Meng C. Hsieh, Matthew N. Fraley, Timo E. Mahonen, Larold L. Olson
  • Publication number: 20080286612
    Abstract: There is provided a tunneling magnetic sensing element having an insulating barrier layer composed of Ti—O, a high rate of resistance change (?R/R) compared with the known art, and an interlayer coupling magnetic field Hin lower than that in the known art while low RA is maintained and the coercivity of a free magnetic layer is maintained at a low level comparable to the known art; and a method for producing the tunneling magnetic sensing element. An insulating barrier layer is composed of Ti—O. A free magnetic layer is formed on the insulating barrier layer and has a laminated structure of an enhancing sublayer composed of a CoFe alloy, a Pt sublayer, and a soft magnetic sublayer composed of a NiFe alloy, stacked in that order from the bottom.
    Type: Application
    Filed: August 3, 2007
    Publication date: November 20, 2008
    Inventors: Masahiko Ishizone, Masamichi Saito, Kazumasa Nishimura, Yosuke Ide, Ryo Nakabayashi, Naoya Hasegawa
  • Patent number: 7449255
    Abstract: A magnetic recording medium for communication with a transducer moving relative to the recording medium along a line of relative transducer motion. The magnetic recording medium has a substrate with a substrate surface, and a seed layer on the substrate surface. The magnetic recording medium also has a soft magnetic underlayer on the seed layer. The soft magnetic underlayer includes a magnetic material having a magnetic moment larger than 1.7 teslas. The soft magnetic underlayer has a texture that provides a magnetic easy axis that has an easy axis alignment parallel to the line of relative transducer motion. A magnetic storage layer is on the soft magnetic underlayer.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: November 11, 2008
    Assignee: Seagate Technology LLC
    Inventors: Yukiko Kubota, Duane Clifford Karns, Kurt Warren Wierman
  • Publication number: 20080268293
    Abstract: According to an aspect of an embodiment, a magnetic recording medium includes a soft under layer, a seed layer containing an alloy, placed over the soft under layer, a ruthenium containing layer containing crystalline Ru, directly placed on the seed layer, and a recording layer placed over the ruthenium containing layer. The alloy contains metal atoms bonded to one another with a minimum distance of adjacent atoms. The difference between the minimum distance of the atoms in the alloy and that of the atoms in the crystalline Ru is 2% or less.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 30, 2008
    Applicant: FUJITSU LIMITED
    Inventor: Antony Ajan
  • Publication number: 20080268288
    Abstract: Devices based on spinodally decomposed periodic structures and their fabrication techniques.
    Type: Application
    Filed: May 10, 2006
    Publication date: October 30, 2008
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, a corporation of California
    Inventor: Sungho Jin
  • Publication number: 20080261081
    Abstract: Provided is a perpendicular magnetic recording medium and a method of manufacturing the same. The perpendicular magnetic recording medium includes a substrate, a buffer layer formed on the substrate, a soft magnetic underlayer formed on the buffer layer, and a recording layer formed on the soft magnetic underlayer.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 23, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hoo-san Lee, Sung-dong Suh, Tae-sang Park, Hoon-sang Ho
  • Publication number: 20080260942
    Abstract: A grain diameter controlling crystalline layer comprising crystalline grains of a metal selected from the group consisting essentially of Cu, Ni, Rh and Pt was formed on a substrate. Then, deposited atom layer of at least one element selected from the group consisting of oxygen and carbon was formed on the surface of the grain diameter control layer. A magnetic recording layer was deposited on the atoms deposited grain diameter controlling crystalline layer. Then a magnetic recording medium in which the magnetic crystalline grains has small grain diameter and small grain diameter distribution, and the magnetic recording medium shows increased signal to noise ratio at high recording density.
    Type: Application
    Filed: October 19, 2007
    Publication date: October 23, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoyuki MAEDA, Akira KIKITSU, Soichi OIKAWA, Takeshi IWASAKI
  • Publication number: 20080260943
    Abstract: The conventional free layer in a CPP GMR or TMR read head has been replaced by a tri-layer laminate comprising Co rich CoFe, moderately Fe rich NiFe, and heavily Fe rich NiFe. The result is an improved device that has a higher MR ratio than prior art devices, while still maintaining free layer softness and acceptable magnetostriction. A process for manufacturing the device is described.
    Type: Application
    Filed: June 19, 2008
    Publication date: October 23, 2008
    Inventors: Hui-Chuan Wang, Min Li, Tong Zhao, Kunliang Zhang, Chyu-Jiuh Torng
  • Patent number: 7438946
    Abstract: A ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by the use of the plating method in the presence of a magnetic field. Furthermore, an electromagnetic noise suppressor includes the ferrite film.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: October 21, 2008
    Assignee: NEC TOKIN Corporation
    Inventors: Koichi Kondo, Okikuni Takahata, Tatsuya Chiba, Hiroshi Ono, Shigeyoshi Yoshida, Masanori Abe, Masahiro Yamaguchi
  • Patent number: 7431961
    Abstract: In this invention, we replace low resistivity NiFe with high-resistivity FeNi for the FL2 portion of a composite free layer in a CIP GMR sensor in order to minimize current shunting effects while still retaining both magnetic softness and low magnetostriction. A process for manufacturing the device is also described.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: October 7, 2008
    Assignee: Headway Technologies, Inc.
    Inventors: Tong Zhao, Hui-Chuan Wang, Yun-Fei Li, Chyu-Jiuh Torng
  • Publication number: 20080241600
    Abstract: The present invention provides a magnetic recording medium wherein a fine non-magnetic inorganic powder, the dispersibility of which is improved, is used to improve the surface smoothness of a lower non-magnetic layer, thereby giving an excellent surface smoothness of an upper magnetic layer and electromagnetic conversion property; and a production process thereof. A magnetic recording medium comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, and an upper magnetic layer on the lower non-magnetic layer, wherein the upper magnetic layer contains at least a ferromagnetic powder, and a binder resin material, and the lower non-magnetic layer contains at least carbon black, iron oxide, and a binder resin material, and the iron oxide has an average major axis length of 30 to 100 nm, and a specific surface area based on the BET method of 80 to 120 m2/g, and the iron oxide contains moisture in an amount per unit specific surface area of 0.13 to 0.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: TDK Corporation
    Inventors: Hiroyuki Tanaka, Tsutomu Ide, Osamu Inoue
  • Publication number: 20080236481
    Abstract: Lubricant coatings are applied as lubricant vapor to magnetic disks in a lubricant vapor flow path between the disks and a reservoir for liquid lubricant that is heated to the vapor. The flow path includes a vapor chamber between the reservoir and an apertured diffuser. Plural piezoelectric crystals selectively, at different times, monitor the flow rate of lubricant vapor flowing in the vapor chamber, a result achieved by selectively positioning a shutter that is selectively opened and closed between the vapor flowing in the vapor chamber and the crystals. Temperature variations of the crystals are compensated by a feedback arrangement for maintaining the crystal temperature constant.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: INTEVAC CORPORATION
    Inventors: Carl PETERSEN, Kenneth D. AMES
  • Publication number: 20080220157
    Abstract: A perpendicular magnetic recording medium is disclosed in which each magnetic crystal grain in the magnetic recording layer has a multilayer structure and has a configuration like a truncated cone shape, in which the crystal grain of the final layer deposited in the film surface side at the final stage is smaller than the diameter of the crystal grain in the initial layer deposited on the substrate side at the initial stage. The invention improves S/N (signal output to noise ratio) by enhancing signal output and reducing noises. The medium is produced by a simple manufacturing method suitable for mass production, and provides a medium of high recording density by improving recording resolution.
    Type: Application
    Filed: May 20, 2008
    Publication date: September 11, 2008
    Applicant: Fuji Electric Device Technology Co., Ltd.
    Inventors: Shunji Takenoiri, Yasushi Sakai
  • Publication number: 20080218906
    Abstract: A magnetic recording medium is disclosed in which there is no degradation of magnetic characteristics at the time of manufacture, such as is seen in proposed discrete-track media or patterned media. The medium can be manufactured by a simple method and results in excellent productivity. Magnetic recording media have a substrate, and, provided thereon in order from the substrate side, are a soft magnetic layer, a crystal orientation control layer, and a magnetic recording layer. The area of at least a portion of the crystal orientation control layer is provided with a depressed portion. Portions of the magnetic layer formed on this depressed portion have a non-granular structure, whereas portions of the magnetic formed on the crystal orientation control layer outside the depressed portion have a granular structure.
    Type: Application
    Filed: March 4, 2008
    Publication date: September 11, 2008
    Applicant: FUJI ELECTRIC DEVICE TECHNOLOGY CO., LTD.
    Inventor: Shinji UCHIDA
  • Patent number: 7422912
    Abstract: In one embodiment, a memory device includes a plurality of magnetic data cells and a magnetic reference cell extending uninterrupted along more than one of the plurality of data cells.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: September 9, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Thomas C. Anthony, Judy Bloomquist, legal representative, Manoj K. Bhattacharyya, Darrel R. Bloomquist
  • Publication number: 20080204937
    Abstract: This magnetic recording medium comprising at least a non-magnetic underlayer on a non-magnetic substrate, a first recording magnetic layer on the non-magnetic underlayer, a second recording magnetic layer on the first recording magnetic layer, and a third recording magnetic layer on the second recording magnetic layer. The first recording magnetic layer, the second recording magnetic layer and the third recording magnetic layer are made of a CoCrPtB alloy. The second recording magnetic layer has a smaller Cr content and a greater B content than the first recording magnetic layer, and the third recording magnetic layer has a smaller Cr content and a greater B content than the first recording magnetic layer and a smaller Pt content than the second recording magnetic layer. The magnetic recording medium according to the present invention can obtain high output medium characteristic with low noise and excellent written performance.
    Type: Application
    Filed: December 18, 2007
    Publication date: August 28, 2008
    Applicant: Fujitsu limited
    Inventors: Yuuki Yoshida, Jun Taguchi, Kazuhisa Shida, Noriyuki Asakura, Akira Kikuchi
  • Publication number: 20080206601
    Abstract: A perpendicular magnetic recording medium includes a substrate, a first underlayer formed over the substrate and formed of ruthenium or a ruthenium alloy with crystal grains growing approximately perpendicular to the substrate and isolated from one another in an in-plane direction by a first air gap, a recording layer placed over the first underlayer and formed of magnetic crystal grains growing approximately perpendicular to the substrate and isolated one another in the in-plane direction by a second air gap, and a grain size dispersion preventing layer inserted between the recording layer and the first underlayer, the grain size dispersion preventing layer including crystal grains of a cobalt-based alloy growing approximately perpendicular to the substrate and an oxide isolating the crystal grains of the cobalt-based alloy from one another in the in-plane direction.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 28, 2008
    Applicant: FUJITSU LIMITED
    Inventor: Ryoichi Mukai
  • Publication number: 20080182015
    Abstract: Magnetic tunnel junctions are constructed from a MgO or Mg—ZnO tunnel barrier and amorphous magnetic layers in proximity with, and on respective sides of, the tunnel barrier. The amorphous magnetic layer preferably includes Co and at least one additional element selected to make the layer amorphous, such as boron. Magnetic tunnel junctions formed from the amorphous magnetic layers and the tunnel barrier have tunneling magnetoresistance values of up to 200% or more.
    Type: Application
    Filed: October 30, 2007
    Publication date: July 31, 2008
    Applicant: International Business Machines Corporation
    Inventor: Stuart Stephen Papworth Parkin
  • Publication number: 20080171234
    Abstract: According to an aspect of an embodiment, a recording medium comprises: a recording layer having a surface uneven, for recording information; a fixed lubricant layer disposed on the recording layer, the fixed lubricant layer being arranged so as to cover the surface and having a flat surface; and a fluid lubricant layer laminated on the fixed lubricant layer, the fluid lubricant layer having fluidity.
    Type: Application
    Filed: December 19, 2007
    Publication date: July 17, 2008
    Applicant: Fujitsu Limited
    Inventor: Takahiro Imamura
  • Publication number: 20080166596
    Abstract: A Re-based alloy material comprises >50 at. % Re and at least one alloying material selected from grain size refinement elements X which have an atomic radius larger or smaller than that of Re and a solid solubility <˜6 at. % in hcp Re at room or higher temperatures, and lattice matching elements Y which have an atomic radius larger or smaller than that of Re and form a solid solution in hcp Re at room or higher temperatures. The alloy material may further comprise at least one material selected from the group consisting of oxides, nitrides, and carbides. Targets comprising the Re-based alloy material are useful in sputter deposition of improved interlayers for obtaining optimally structured granular perpendicular magnetic recording layers.
    Type: Application
    Filed: October 23, 2007
    Publication date: July 10, 2008
    Applicant: HERAEUS INC.
    Inventors: Anirban DAS, Michael Gene Racine, Makoto Imakawa, Steven Roger Kennedy, Rikhit Arora
  • Publication number: 20080166597
    Abstract: A magnetic recording medium is provided which is capable of higher recording density and has a higher coercive force and a lower noise. A production method of the magnetic recording medium, and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium comprises at least a nonmagnetic undercoat layer, a nonmagnetic intermediate layer, a magnetic layer, and a protective layer, which are laminated in this order on a nonmagnetic substrate, and at least one of the layers of the nonmagnetic undercoat layer is made of a WV alloy or a MoV alloy.
    Type: Application
    Filed: October 25, 2005
    Publication date: July 10, 2008
    Applicant: SHOWA DENKO K.K.
    Inventor: Hiroshi Osawa
  • Publication number: 20080157910
    Abstract: On-die inductively coupled wires and a method of making on-die inductively coupled wires are described. The on-die inductively coupled wires include a first wire to carry a first current, a surface area bounded by a second wire, and, an amorphous soft magnetic layer to couple magnetic flux induced by the first current through the surface area.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Chang-Min Park, Arnel M. Fajardo