Applying Superposed Diverse Coating Or Coating A Coated Base Patents (Class 427/131)
-
Publication number: 20110262634Abstract: A magnetoresistive device has an MgO (magnesium oxide) layer provided between a first ferromagnetic layer and a second ferromagnetic layer. The device is manufactured by forming a film of the MgO layer in a film forming chamber. A substance whose getter effect with respect to an oxidizing gas is large is adhered to surfaces of components provided in the chamber for forming the MgO layer. The substance having a large getter effect is a substance whose value of oxygen gas adsorption energy is 145 kcal/mol or higher. Ta (tantalum), in particular, is preferable as a substance which constitutes the magnetoresistive device.Type: ApplicationFiled: July 6, 2011Publication date: October 27, 2011Applicant: CANON ANELVA CORPORATIONInventors: Yoshinori Nagamine, Koji Tsunekawa, David Djulianto Djayaprawira, Hiroki Maehara
-
Patent number: 8038797Abstract: A method and apparatus for manufacturing a magnetic recording medium uses a small-diameter insulating substrate. The apparatus includes a carrier for a special size of 3.5 inches for receiving a plurality of small-diameter insulating substrates. Seed layers are deposited on the substrates, then each substrate is rotated to shift the position of the substrate so that the movable claw contacts the deposited seed layer. A bias voltage is applied via the movable claw for subsequent deposition layers.Type: GrantFiled: January 3, 2007Date of Patent: October 18, 2011Assignee: Fuji Electric Co., Ltd.Inventors: Takahiro Shimizu, Akihide Hara
-
Patent number: 8039045Abstract: An object of the present invention is to provide a plating method on a glass base plate. The method allows forming a plating film on a base plate composed of a glass material with excellent adhesivity and homogeneity by means of an electroless plating method even to a thickness of 1 ?m or more. Before forming a plating film by a step of electroless plating S6, a surface treatment process is conducted on a surface of the base plate composed of a glass material. The surface treatment process comprises at least a step of glass activation treatment S2 to increase quantity of silanol groups on the surface of the base plate at least by a factor of two using an aqueous solution of diluted acid, a step of silane coupling agent treatment S3, a step of palladium catalyst treatment S4, and a step of palladium bonding treatment S5.Type: GrantFiled: July 27, 2005Date of Patent: October 18, 2011Assignee: Fuji Electric Co., Ltd.Inventors: Youichi Tei, Akira Iso, Kazuhito Higuchi, Hajime Kurihara, Hiroyuki Uwazumi
-
Publication number: 20110249364Abstract: A process (and the structure resulting therefrom) is described for manufacturing a magnetic write head in which there is no physical interface between the first and second trailing shields. This is achieved by the introduction of a sacrificial layer immediately after the top yoke plating has been done and its photoresist mold has been stripped.Type: ApplicationFiled: April 7, 2010Publication date: October 13, 2011Inventors: Zhigang Bai, Moris Dovek, Yan Wu, Cherng-Chyi Han, Jiun-Ting Lee
-
Patent number: 8034404Abstract: A method for producing a white powder, which includes forming on a surface of a base particle a titanium oxide film and a metallic silver film contiguously one upon another in this order, wherein the base particle includes a magnetic material, and wherein said step of forming on the surface of the base particle the titanium oxide film includes dispersing the base particle in a buffer solution and adding a titanium salt aqueous solution while agitating the dispersion.Type: GrantFiled: June 9, 2003Date of Patent: October 11, 2011Assignees: Nittetsu Mining Co., Ltd.Inventors: Akira Kishimoto, Takafumi Atarashi, Shinichi Ogura, Kiyoshi Hoshino, Tetsurou Hoshiba, Katsuto Nakatsuka
-
Patent number: 8034413Abstract: 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: GrantFiled: November 10, 2008Date of Patent: October 11, 2011Assignee: Fuji Electric Co., Ltd.Inventor: Shinji Uchida
-
Publication number: 20110244119Abstract: A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) atoms and carbon (C) atoms with a number ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of 1350 cm?1 is separated from G peak Gh appearing in the vicinity of 1520 cm?1 by the Gauss function.Type: ApplicationFiled: June 20, 2011Publication date: October 6, 2011Applicant: WD MEDIA (SINGAPORE) PTE. LTD.Inventors: TEIICHIRO UMEZAWA, MASAFUMI ISHIYAMA, KENJI AYAMA, TOKICHIRO SATO
-
Publication number: 20110236568Abstract: A magnetic cell structure including a nonmagnetic filament contact, and methods of fabricating the structure are provided. The magnetic cell structure includes a free layer, a pinned layer, an insulative layer between the free and pinned layers, and a nonmagnetic filament contact in the insulative layer which electrically connects the free and pinned layers. The nonmagnetic filament contact is formed from a nonmagnetic source layer, also between the free and pinned layers. The filament contact directs a programming current through the magnetic cell structure such that the cross sectional area of the programming current in the free layer is less than the cross section of the structure. The decrease in the cross sectional area of the programming current in the free layer enables a lower programming current to reach a critical switching current density in the free layer and switch the magnetization of the free layer, programming the magnetic cell.Type: ApplicationFiled: June 6, 2011Publication date: September 29, 2011Applicant: Micron Technology, Inc.Inventors: Jun Liu, Gurtej Sandhu
-
Publication number: 20110220611Abstract: A method of manufacturing a perpendicular magnetic recording head capable of easily and accurately forming a main magnetic-pole layer having a shape suitable for concentrating a magnetic flux is provided. A nonmagnetic layer having a recessed section (a first recessed section and a second recessed section) is formed, and then an additional nonmagnetic layer is formed on an inner surface of the recessed section. Then, a magnetic layer is formed in the recessed section formed with the additional nonmagnetic layer, and then the magnetic layer is cut to form an air bearing surface, so as to form the main magnetic-pole layer.Type: ApplicationFiled: March 12, 2010Publication date: September 15, 2011Applicant: SAE Magnetics (H.K.) Ltd.Inventors: Tetsuya Mino, Naoto Matono, Ikuhito Onodera, Kazushi Nishiyama, Michitoshi Tsuchiya, Kenji Sasaki
-
Publication number: 20110217531Abstract: A fabrication method for fabricating a magnetic film provided body includes preparing a base body and forming a magnetic film on the base body. The magnetic film includes organic film(s) and ferrite film(s) alternately layered. The formation of the magnetic film alternately includes forming a ferrite film through a ferrite plating method, the ferrite film having a thickness of 20 ?m or less, and forming an organic film having a thickness of 0.1 ?m to 20 ?m, both inclusive, and a ratio t/E of 0.025 ?m/GPa or more, where “t” indicates the thickness of the organic film while “E” indicates Young's modulus of the organic film.Type: ApplicationFiled: July 29, 2009Publication date: September 8, 2011Inventors: Koichi Kondo, Hiroshi Ono, Yukihiro Numata
-
Publication number: 20110205663Abstract: It is an object to produce a magnetic storage medium of a high recording density by a production method that does not impair mass productivity, and a magnetic storage medium 10 is produced by a production method including: a magnetic-film forming step of forming a magnetic film 61 on a substrate 62; and a dots separating step of reducing saturation magnetization by locally injecting mixed ions of N2+ ion and N+ ion into an area, of the substrate 62, other than plural areas which respectively become magnetic dots 62c where information is to be magnetically recorded, thereby forming, between the magnetic dots 62c, a between-dot separator 62d having saturation magnetization smaller than saturation magnetization of the magnetic dots 62c.Type: ApplicationFiled: September 30, 2009Publication date: August 25, 2011Applicant: ULVAC, INC.Inventors: Kenji Sato, Tsutomu Tanaka, Takuya Uzumaki, Tsutomu Nishihashi, Tadashi Morita, Kazuhiro Watanabe
-
Patent number: 7998606Abstract: A perpendicular magnetic recording medium having a substrate, a Cr-doped Fe-alloy-containing underlayer containing about 8 to 18 at % Cr and a perpendicular recording magnetic layer, and a process for improving corrosion resistance of the recording medium and for manufacturing the recording medium are disclosed.Type: GrantFiled: July 27, 2009Date of Patent: August 16, 2011Assignee: Seagate Technology LLCInventors: Raj Nagappan Thangaraj, Mariana Rodica Munteanu, Erol Girt, Michael J. Stirniman, Thomas Patrick Nolan
-
Patent number: 7998607Abstract: A perpendicular recording magnetic media with a partially-oxidized cap layer combines a second oxide layer with a first cap layer to form the singular, partially-oxidized cap. The oxidized portion and the non-oxidized portion of the partially-oxidized layer are sputtered from a same target and have a same composition of metallic elements. The Ms of the oxidized portion is about twice as high as the non-oxidized portion. The oxidized portion has a thickness in the range of about 5 to 25 angstroms. The layer composition may comprise CoPtCrBTa, with a Cr at % of about 18-24%, Pt at about 13-20%, B at about 4-10%, and Ta at about 0-2%.Type: GrantFiled: July 31, 2009Date of Patent: August 16, 2011Assignee: Hitachi Global Storage Technologies Netherlands, B.V.Inventor: Yoshihiro Ikeda
-
Patent number: 7993764Abstract: A perpendicular magnetic recording medium includes a soft magnetic backing layer, an underlayer, a nonmagnetic intermediate layer, and a magnetic recording layer sequentially deposited on a nonmagnetic substrate. The underlayer can contain cobalt, nickel, and iron and have an fcc structure and exhibit soft magnetic property. The underlayer preferably contains nickel in a range of 30 to 88 at % and iron in a range of 0.1 to 22 at %. The underlayer can further contain Si, B, Nb, N, Ta, Al, Pd, Cr, or Mo. The nonmagnetic intermediate layer preferably contains at least one element selected from Ru, Re, Pd, Ir, Pt, and Rh. The magnetic recording layer preferably has a granular structure. A seed layer can be further provided between the soft magnetic backing layer and the underlayer.Type: GrantFiled: October 21, 2005Date of Patent: August 9, 2011Assignee: Fuji Electric Device Technology Co., Ltd.Inventors: Shunji Takenoiri, Yasushi Sakai
-
Patent number: 7993497Abstract: In a magnetic disk having at least a glass substrate, a plurality of underlayers formed over the glass substrate, and a magnetic layer formed over the plurality of underlayers, at least one of the underlayers is an amorphous underlayer containing a VIa group element and carbon and, given that the remanent magnetization in a circumferential direction of the disk is Mrc and the remanent magnetization in a radial direction of the disk is Mrr, the magnetic disk has a magnetic anisotropy in which Mrc/Mrr being a ratio between Mrc and Mrr exceeds 1.Type: GrantFiled: November 21, 2006Date of Patent: August 9, 2011Assignee: WD Media (Singapore) Pte. Ltd.Inventors: Keiji Moroishi, Chor Boon Ang
-
Publication number: 20110171492Abstract: In a magnetic disk including a magnetic layer, a protecting layer and a lubricating layer on a substrate, the lubricating layer is formed by a self assembly monolayer. A material of the self assembly monolayer is a hydrocarbon-based silane agent or a partial fluorinated hydrocarbon-based silane agent. The magnetic layer and the protecting layer (P) are sequentially formed on the substrate, and then the substrate on which the magnetic layer and the protecting layer (P) are formed is immersed in a solution containing the hydrocarbon-based silane agent or the partial fluorinated hydrocarbon-based silane agent, and thus a lubricating layer (L) is formed on the protecting layer (P).Type: ApplicationFiled: March 29, 2007Publication date: July 14, 2011Applicant: HOYA CorporationInventor: Kota Suzuki
-
Publication number: 20110158578Abstract: A novel technique is provided, which can manufacture an optical nonreciprocal element constituted of an Si waveguide layer and a magneto-optical material layer without using wafer bonding. A magneto-optical material layer is deposited on a substrate, an Si layer is deposited on the aforesaid magneto-optical material layer, a waveguide is formed on the aforesaid Si layer, and the aforesaid magneto-optical material layer is magnetized so as to be able to cause a light propagating in the aforesaid waveguide to generate a nonreciprocal phase change.Type: ApplicationFiled: August 27, 2008Publication date: June 30, 2011Inventor: Hideki Yokoi
-
Publication number: 20110141606Abstract: According to one embodiment, a TMR effect element includes a ground layer, an antiferromagnetic layer above the ground layer, a first ferromagnetic layer above the antiferromagnetic layer and exchange-coupled to the antiferromagnetic layer, an anti-parallel coupling layer above the first ferromagnetic layer, a second ferromagnetic layer having a magnetic moment coupled anti-parallel to the magnetic moment of the first ferromagnetic layer via the anti-parallel coupling layer, an insulation barrier layer above the second ferromagnetic layer, and a third ferromagnetic layer above the insulation barrier layer. At least a portion of the second ferromagnetic layer and at least a portion of the third ferromagnetic layer on an insulation barrier layer side are comprised of a crystal, and the insulation barrier layer comprises MgO and an oxide material having an independent cubic crystal structure and complete solid solubility with MgO.Type: ApplicationFiled: November 29, 2010Publication date: June 16, 2011Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Koichi Nishioka, Koji Sakamoto, Tatsumi Hirano
-
Patent number: 7951415Abstract: A pole layer has an end located in a medium facing surface, the end having: a first side close to a substrate; a second side located opposite to the first side; a third side connecting an end of the first side to an end of the second side; and a fourth side connecting the other end of the first side to the other end of the second side. The second side defines a track width. The end of the pole layer located in the medium facing surface has a width that decreases toward the first side. The pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic insulating material, with a nonmagnetic conductive film provided between the encasing layer and the pole layer. The pole layer incorporates: a first layer located closer to the surface of the groove; and a second layer located farther from the surface of the groove.Type: GrantFiled: August 15, 2008Date of Patent: May 31, 2011Assignee: Headway Technologies, Inc.Inventors: Yoshitaka Sasaki, Dong-Hong Li, Shigeki Tanemura, Hiroyuki Itoh
-
Patent number: 7950135Abstract: A manufacturing method of an MR element in which current flows in a direction perpendicular to layer planes, includes a step of forming on a lower electrode layer an MR multi-layered structure with side surfaces substantially perpendicular to the layer lamination plane, a step of forming a first insulation layer on at least the side surfaces of the formed MR multi-layered structure, a step of forming a second insulation layer and a magnetic domain control bias layer on the lower electrode layer, and a step of forming an upper electrode layer on the MR multi-layered structure and the magnetic domain control bias layer.Type: GrantFiled: May 31, 2007Date of Patent: May 31, 2011Assignee: TDK CorporationInventors: Takeo Kagami, Takayasu Kanaya
-
Publication number: 20110123727Abstract: A method for making an article comprising a multilayered structure comprising a series of magnetic layers is provided. The method includes providing a substrate and depositing a series of magnetic layers on the substrate and disposing insulating layers between successive magnetic layers. Each magnetic layer has a thickness of at least about 2 micrometers and magnetic material has an average grain size less than 200 nm.Type: ApplicationFiled: January 31, 2011Publication date: May 26, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Luana Emiliana Iorio, Pazhayannur Ramanathan Subramanian
-
Publication number: 20110116193Abstract: An apparatus comprises a slider body, a transducer and a write driver. The transducer comprises a writer. The write driver is integrated on the slider body, and directly connected to the writer.Type: ApplicationFiled: November 16, 2009Publication date: May 19, 2011Applicant: Seagate Technology LLCInventors: Mark Anthony Gubbins, Todd Michael Lammers
-
Magnetic recording medium with diamond-like carbon protective film, and manufacturing method thereof
Patent number: 7943193Abstract: Embodiments of the invention provide a magnetic recording medium superior in terms magnetic head flying performance, abrasion resistant reliability and corrosion resistance and a method for manufacturing the same. In one embodiment, method for manufacturing a magnetic recording medium, comprising forming at least an adhesion layer, a soft magnetic layer, a granular magnetic film and a diamond-like carbon (DLC) protective film on a nonmagnetic substrate. While the DLC protective film layer to protect the granular magnetic layer of the magnetic recording medium is formed, hydrocarbon gas is mixed with hydrogen gas and a bias voltage is applied to the substrate.Type: GrantFiled: October 18, 2005Date of Patent: May 17, 2011Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Naoto Endou, Shigehiko Fujimaki, Hiroyuki Matsumoto, Toshinori Ono -
Publication number: 20110111262Abstract: An object of the present invention is to provide a method of manufacturing a perpendicular magnetic recording medium (100) in which both of a coercive force Hc and reliability can be achieved at a higher level even with heating at the time of forming a medium protective layer (126) and to provide the perpendicular magnetic recording medium (100).Type: ApplicationFiled: March 25, 2009Publication date: May 12, 2011Applicant: WD Media (Singapore) Pte. Ltd.Inventors: Teiichiro Umezawa, Masafumi Ishiyama, Tokichiro Sato, Kenji Ayama, Takahiro Onoue, Junichi Horikawa
-
Publication number: 20110111261Abstract: Perpendicular magnetic recording (PMR) media and methods of fabricating PMR media are described. The PMR media includes, among other layers, an underlayer, a first onset layer on the underlayer, a second onset layer on the first onset layer, and a perpendicular magnetic recording layer on the second onset layer. The second onset layer has a magnetic moment which is higher than both a magnetic moment of the first onset layer and a magnetic moment of the perpendicular magnetic recording layer.Type: ApplicationFiled: November 9, 2009Publication date: May 12, 2011Inventors: Xiaoping Bian, Jack Jyh-Kau Chang, Zhupei Shi
-
Patent number: 7939870Abstract: A magnetoresistive device comprises a ferromagnetic region, a non-ferromagnetic region, an insulating region and a conductive region. The insulating region is arranged between the ferromagnetic region and the conductive region so as to provide a tunnel barrier. The non-ferromagnetic region separates the insulating region and the ferromagnetic region.Type: GrantFiled: November 26, 2008Date of Patent: May 10, 2011Assignee: Hitachi, Ltd.Inventors: Joerg Wunderlich, Byong Guk Park, Alexander Shick, Tomas Jungwirth, Frantisek Maca
-
Publication number: 20110102944Abstract: An object of the present invention is to provide a perpendicular magnetic recording medium including a suitable lubricating layer with sufficient durability, moisture resistance, and contamination resistance and also maintaining an R/W characteristic. In a typical structure of the present invention, a method of manufacturing a perpendicular magnetic recording medium 100 including a magnetic recording layer 122, a medium protective layer 126, and a lubricating layer 128 in this order on a base 110 includes: a CF bond density measuring step of measuring a CF bond density of a lubricant; and a lubricating layer forming step of forming a lubricating layer with the lubricant when the measured CF bond density is 2.0×1022 to 2.7×1022 atoms/cm3.Type: ApplicationFiled: March 24, 2009Publication date: May 5, 2011Applicant: WD MEDIA (SINGAPORE) PTE. LTD.Inventor: Kouta Suzuki
-
Publication number: 20110097603Abstract: An object of the present invention is to provide a perpendicular magnetic recording medium in which each space between crystal grains of a first magnetic recording layer is so designed as to allow the layer to also have a function as a continuous layer, and a method of manufacturing a perpendicular magnetic recording medium. In a perpendicular magnetic recording medium 100 according to the present invention, a first magnetic recording layer 122a and a second magnetic recording layer 122b are ferromagnetic layers each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a column shape and, in the first magnetic recording layer 122a, an intergranular distance defined by an average of shortest distances between grain boundary parts each between a crystal grain and its adjacent crystal grain is equal to or shorter than 1 nm.Type: ApplicationFiled: March 26, 2009Publication date: April 28, 2011Applicant: WD MEDIA (SINGAPORE) PTE. LTD.Inventor: Takahiro Onoue
-
Publication number: 20110097600Abstract: An object of the present invention is to provide a perpendicular magnetic recording medium 100 including a magnetic recording layer 122, the medium in which a particle diameter of crystal grains in the magnetic recording layer 122 of a two-layer structure is so designed as to improve an SNR while a high coercive force is maintained.Type: ApplicationFiled: March 26, 2009Publication date: April 28, 2011Applicant: WD MEDIA (SINGAPORE) PTE. LTD.Inventor: Takahiro Onoue
-
Patent number: 7931977Abstract: The present invention relates to information storage media, and more particularly, to ultra-high density magnetic information storage media which comprises a plurality of discrete islands of magnetic material.Type: GrantFiled: June 16, 2005Date of Patent: April 26, 2011Assignee: Universitat KonstanzInventors: Günter Schatz, Manfred Albrecht, Johannes Boneberg, Iidico Guhr
-
Publication number: 20110089940Abstract: A magnetoresistive sensor that has a free layer with a face centered cubic, 100 crystal orientation formed on an underlayer structure that has been deposited in the presence of nitrogen. The free layer can be constructed of CoFe, Co2(Mn(1-y)Fey)X (where 0?y?1 and X is Si, Ge, Sn, Al, Ga, or a combination thereof), CoFeX (where X is Si, Ge, Sn, Al, Ga, or a combination thereof). The under-layer can include a layer of Ta, a Cu layer formed over the layer of Ta and deposited using a process gas comprising about 20 percent nitrogen and a layer of Ag deposited over the layer of Cu and deposited using a process gas comprising about 50 to 100 percent nitrogen.Type: ApplicationFiled: October 16, 2009Publication date: April 21, 2011Inventors: Matthew J. Carey, Shekar B Chandrashekariaih, Jeffrey R. Childress, Stefan Maat
-
Publication number: 20110085265Abstract: A magnetic head according to one embodiment includes at least two write transducers for writing to a magnetic medium; and a shield structure having at least two magnetically connected shields which at least partially cover two opposite sides of the writer. A magnetic head according to another embodiment includes at least two write transducers for writing to a magnetic medium, the at least two write transducers being positioned adjacent each other and aligned along a line; and a shield structure having shields adjacent at least three sides of each of the at least two write transducers, the shields being formed of a magnetically permeable material. Additional devices, systems, and methods are also presented.Type: ApplicationFiled: October 13, 2009Publication date: April 14, 2011Applicant: International Business Machines CorporationInventors: Robert G. Biskeborn, Philipp Herget
-
Patent number: 7919139Abstract: CPP magnetic read head designs have been improved by increasing the length of the AFM layer relative to that of both the free and spacer layers. The length of the pinned layer is also increased, but by a lesser amount, an abutting conductive layer being inserted to fill the remaining space over the AFM layer. The extended pinned layer increases the probability of spin interaction while the added conducting layer serves to divert sensor current away from the bottom magnetic shield which now is no longer needed for use as a lead.Type: GrantFiled: May 19, 2008Date of Patent: April 5, 2011Assignee: Headway Technologies, Inc.Inventors: Charles C. Lin, Min Li
-
Publication number: 20110075288Abstract: A novel magnetic recording medium is disclosed in which a plurality of magnetic data recording layers and navigation layers are separate from one another. By decoupling the navigation and data layers, data may be written to data layers without the need to align the written data along servo tracks. Thus, the data layers may be configured for high recording density. Beneficially, imperfections within the magnetic data layers may also be compensated for by the use of adaptive error correction schemes which vary the encoding/decoding of data during writing/reading based upon the local quality of the recording media.Type: ApplicationFiled: May 29, 2009Publication date: March 31, 2011Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Alexander Krichevsky, Sakhrat Khizroev, Ilya Isaakovich Dumer, Andrey Alekseyevich Lavrenov, Nissim Amos
-
Publication number: 20110049656Abstract: A magnetic tunnel junction (MTJ) device and fabrication method is disclosed. In a particular embodiment, a method of forming a magnetic tunnel junction (MTJ) device includes forming a top electrode layer over an MTJ structure. The top electrode layer includes a first nitrified metal.Type: ApplicationFiled: September 11, 2009Publication date: March 3, 2011Applicant: QUALCOMM INCORPORATEDInventors: Xia Li, Seung H. Kang
-
Patent number: 7897200Abstract: 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: GrantFiled: July 31, 2008Date of Patent: March 1, 2011Assignee: National Chung Cheng UniversityInventors: Jyh-Shen Tsay, Chi-Wei Lee, Gung Chern
-
Patent number: 7897201Abstract: A method is for manufacturing a magnetoresistance effect element having a magnetization fixed layer, a non-magnetic intermediate layer, and a magnetization free layer being sequentially stacked. The method includes: forming at least a part of a magnetic layer that is to become either one of the magnetization fixed layer and the magnetization free layer; forming a function layer including at least one of an oxide, a nitride, and a fluoride on the part of the magnetic layer; and removing a part of the function layer by exposing the function layer to either one of an ion beam and plasma irradiation.Type: GrantFiled: February 8, 2007Date of Patent: March 1, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Hiromi Yuasa, Hideaki Fukuzawa, Yoshihiko Fuji, Hitoshi Iwasaki
-
Publication number: 20110041878Abstract: Disclosed is a method for removing residue from a surface comprising: contacting the surface with a composition comprising at least one unsaturated fluorinated hydrocarbon selected from the group consisting of compounds having the formula E- or Z—R1CH?CHR2, wherein R1 and R2 are, independently, C1 to C6 perfluoroalkyl groups, or C1 to C6 hydrofluoroalkyl groups, and recovering the surface from the composition.Type: ApplicationFiled: October 26, 2010Publication date: February 24, 2011Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: MARIO JOSEPH NAPPA, MELODIE A. SCHWEITZER, ALLEN CAPRON SIEVERT, EKATERINA N. SWEARINGEN
-
Publication number: 20110032643Abstract: A disk for a hard disk drive. The disk includes a first magnetic layer supported by a substrate and an intermediate layer adjacent to the first magnetic layer. The disk also includes a second magnetic layer that is adjacent to the intermediate layer and includes barium. The barium second magnetic layer has a mechanical hardness so that a protective layer such as COC is not required for the disk.Type: ApplicationFiled: August 5, 2009Publication date: February 10, 2011Inventor: Sooyoul Hong
-
Publication number: 20110026162Abstract: Provided is a magnetic disk that is excellent in durability, particularly in LUL durability and CFT properties, and thus has high reliability despite the low flying height of a magnetic head following the rapid increase in recording density in recent years and despite the very strict environmental resistance following the diversification of applications. A magnetic disk (10) has at least a magnetic layer (6), a carbon-based protective layer (7), and a lubricating layer (8) provided in this order over a substrate (1). The lubricating layer (8) contains a compound having a perfluoropolyether main chain in a structure thereof and having a polar group other than at ends of a molecule thereof.Type: ApplicationFiled: March 27, 2009Publication date: February 3, 2011Applicant: HOYA CORPORATIONInventors: Katsushi Hamakubo, Kae Itoh
-
Publication number: 20110026169Abstract: A dual current-perpendicular-to-plane scissor sensor according to one embodiment includes a middle free layer; two outer free layers positioned on opposite sides of the middle free layer; spacer layers between the middle free layer and each of the outer free layers; and a hard bias layer positioned behind the free layers relative to a media-facing surface of the sensor, wherein the free layers are about magnetostatically balanced.Type: ApplicationFiled: July 28, 2009Publication date: February 3, 2011Inventors: Hardayal Singh Gill, Wen-Chien David Hsiao, Douglas Johnson Werner
-
Publication number: 20110014498Abstract: This invention provides a magnetic disk which can satisfactorily suppress the elution of internal components from an end face of a magnetic disk, and corrosion damage. The magnetic disk comprises a disk substrate, and a thin film including a magnetic layer, a carbon-based protective layer, and a lubricating layer provided in that order on the disk substrate. The main surface and the end face of the magnetic disk are covered with the carbonaceous protective layer. The carbon-based protective layer contains nitrogen at a part adjacent to the lubricating layer. The content of nitrogen atoms relative to the content of carbon atoms in the protective layer formed on the end face is equal to or more than the content of nitrogen atoms relative to the content of carbon atoms in the protective layer formed on the main surface.Type: ApplicationFiled: September 24, 2008Publication date: January 20, 2011Applicant: HOYA CORPORATIONInventors: Akira Shimada, Ito Nakamura
-
Publication number: 20110013311Abstract: A magnetic recording medium comprising a magnetic layer having a magnetic recording pattern comprising elevations constituting magnetic recording regions and depressions constituting boundary regions for partitioning the magnetic recording regions, and a continuous protective carbon overcoat on the magnetic layer, characterized in that portions of the carbon overcoat located on the magnetic recording regions-constituting elevations of the magnetic layer are thicker than portions of the carbon overcoat located on the boundary regions-constituting depressions of the magnetic layer. The protective carbon overcoat is formed by a CVD method. The boundary regions-constituting depressions are preferably subjected to exposure to plasma, and have modified magnetic characteristics. The magnetic recording regions exhibit high corrosion resistance and the magnetic recording medium has enhanced environmental resistance.Type: ApplicationFiled: March 3, 2009Publication date: January 20, 2011Inventor: Masato Fukushima
-
Publication number: 20110006384Abstract: A magnetic tunnel junction includes an amorphous ferromagnetic reference layer having a first reference layer side and an opposing second reference layer side. The first reference layer side has a greater concentration of boron than the second reference layer side. A magnesium oxide tunnel barrier layer is disposed on the second side of the amorphous ferromagnetic reference layer. The magnesium oxide tunnel barrier layer has a crystal structure. An amorphous ferromagnetic free layer is disposed on the magnesium oxide tunnel barrier layer.Type: ApplicationFiled: July 13, 2009Publication date: January 13, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Xilin Peng, Konstantin Nikolaev, Taras Pokhil, Victor Sapozhnikov, Yonghua Chen
-
Patent number: 7867579Abstract: The present invention provides a method for forming a carbon protective film and a method for producing a magnetic recording medium, that decreases the generation of particles in a plasma CVD apparatus thereby improving flatness of the surface of a carbon protective film, and also can manufacture a magnetic recording medium having high recording density and excellent recording/reproducing characteristics; a magnetic recording medium; and a magnetic recording/reproducing apparatus using the magnetic recording medium.Type: GrantFiled: January 10, 2008Date of Patent: January 11, 2011Assignee: Showa Denko K.K.Inventor: Hiroyuki Machida
-
Publication number: 20100328822Abstract: A method and system for providing a magnetic recording transducer is described. The method and system include providing a pinned layer for a magnetic element. In one aspect, a portion of a tunneling barrier layer for the magnetic element is provided. The magnetic recording transducer annealed is after the portion of the tunneling barrier layer is provided. The annealing is at a temperature higher than room temperature. A remaining portion of the tunneling barrier layer is provided after the annealing. In another aspect, the magnetic transducer is transferred to a high vacuum annealing apparatus before annealing the magnetic transducer. In this aspect, the magnetic transducer may be annealed before any portion of the tunneling barrier is provided or after at least a portion of the tunneling barrier is provided. The annealing is performed in the high vacuum annealing apparatus. A free layer for the magnetic element is also provided.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Applicant: WESTERN DIGITAL (FREMONT), LLCInventors: CHANDO PARK, QUNWEN LENG, MAHENDRA PAKALA
-
Publication number: 20100323223Abstract: A discrete track medium and a patterned medium that are excellent in both magnetic recording properties and corrosion resistance are realized. The medium has a magnetic recording layer, which includes a magnetic region formed in a projection portion of a projection/recess pattern over a substrate and a filler region embedded in a recess portion of the projection/recess pattern, and an organic compound, which exhibits corrosion inhibition action for cobalt or cobalt alloys, between the magnetic region and the filler region.Type: ApplicationFiled: June 21, 2010Publication date: December 23, 2010Inventors: Katsumi MABUCHI, Haruo Akahoshi
-
Publication number: 20100323222Abstract: A magnetic recording medium includes: a nonmagnetic support having both principal planes, a nonmagnetic layer formed on one principal plane of the nonmagnetic support and containing a nonmagnetic powder, a conductive particle and a binder, and a magnetic layer formed on the nonmagnetic layer and containing a magnetic powder, a conductive particle and a binder, wherein each of the nonmagnetic layer and the magnetic layer is prepared in a wet on dry mode, and a conduction point particle size of the conductive particle contained in the magnetic layer falls within the range of 3 times or more and not more than 5 times an average thickness of the magnetic layer.Type: ApplicationFiled: June 15, 2010Publication date: December 23, 2010Applicant: Sony CorporationInventors: Eiji Nakashio, Futoshi Sasaki, Katsunori Maeshima, Yusuke Tamakawa, Kuniko Yamamoto, Minoru Yamaga
-
Publication number: 20100321826Abstract: It is an object to manufacture magnetic recording media with the high recording density. Since nonmagnetic portions (8) with a predetermined pattern are formed in a recording auxiliary layer (4) formed on a magnetic recording layer (3), it is possible to actualize a magnetic recording medium where magnetic portions (7) and the magnetic recording layer (3) immediately below the portions (7) are recording units. The nonmagnetic portions (8) are formed by non-magnetization using ion implantation, and it is thereby possible to manufacture magnetic recording media with the high recording density.Type: ApplicationFiled: March 9, 2009Publication date: December 23, 2010Applicant: HOYA CORPORATIONInventors: Junichi Yasumori, Yoshiaki Sonobe, Tadashi Tomonaga
-
Patent number: 7851014Abstract: Magnetic recording media having a magnetic layer with an easy magnetization axis lying about 35° out of plane of the magnetic layer is disclosed. This media has a reduced total magnetic layer thickness and higher signal, while improving the media signal-to-noise ratio (SNR).Type: GrantFiled: September 6, 2007Date of Patent: December 14, 2010Assignee: Seagate Technology LLCInventor: Thomas Patrick Nolan