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| Number | Title | Issue Date |
| 8142916 | Magnetic recording medium Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is... | 03/27/2012 |
| 8133601 | Magnetic recording medium and magnetic recording and reproducing apparatus A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer ... | 03/13/2012 |
| 8119264 | Perpendicular magnetic recording disk with ultrathin nucleation film for improved corrosion resistance and method for making the disk A perpendicular magnetic recording disk has a granular cobalt alloy recording layer (RL) containing an additive oxide or oxides, an intermediate layer (IL) as an exchange-break layer on the “soft” magnetic underlayer (SUL), and an ultrathin nucleation film (NF) ... | 02/21/2012 |
| 8110299 | Granular perpendicular media interlayer for a storage device An apparatus and method are provided for improving perpendicular magnetic recording media. The present invention provides media, and a method of fabricating media in a cost-effective manner, with a reduced ruthenium (Ru) content interlayer structure, while meeting m... | 02/07/2012 |
| 8105707 | Perpendicular magnetic recording medium A perpendicular magnetic recording medium, which includes a nonmagnetic substrate, and a soft magnetic layer, a first orientation control layer, a nonmagnetic intermediate layer, and a perpendicular magnetic recording layer formed sequentially on the nonmagnetic sub... | 01/31/2012 |
| 8092930 | Chromium nitride film layer In a recording medium, a CrN film layer comprising a B1 phase crystal structure. ... | 01/10/2012 |
| 8057927 | Magnetic recording medium and information storage apparatus A magnetic recording medium includes a nonmagnetic granular layer that has a granular structure in which a plurality of nonmagnetic grains made of a nonmagnetic material are separated from one another by a Cr oxide. The magnetic recording medium further includes a m... | 11/15/2011 |
| 8053096 | Nickel based alloy layer for perpendicular recording media The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy. ... | 11/08/2011 |
| 8048546 | Perpendicular magnetic recording disk with ordered nucleation layer and method for making the disk A continuous-media perpendicular magnetic recording disk with an oxide-containing granular Co alloy recording layer (RL) having minimal grain size dispersion has an ordered nucleation layer (ONL) formed below RL. The ONL has ordered nucleation sites arranged in a ge... | 11/01/2011 |
| 8034471 | Magnetic recording medium, method of manufacturing magnetic recording medium and magnetic recording reproducing apparatus In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer ... | 10/11/2011 |
| 8034472 | Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproducing apparatus The present invention provides a magnetic recording medium which is capable of improving the perpendicular orientation of a perpendicular magnetic recording layer while maintaining a writing performance during recording and obtaining both an improvement in the perpe... | 10/11/2011 |
| 8012613 | Magnetic recording medium, process for producing same, and magnetic recording reproducing apparatus A magnetic recording medium is provided, which has at least one soft magnetic layer, at least one seed layer, at least one underlayer and at least one perpendicular magnetic recording layer, and is characterized in that the or each seed layer is comprised of a coval... | 09/06/2011 |
| 7989097 | Perpendicular magnetic recording medium with tilted easy axis of magnetization, method of manufacturing magnetic recording medium, and magnetic recording apparatus comprising magnetic recording medium According to one embodiment, a magnetic recording medium includes a substrate, a first underlayer formed on the substrate and including an amorphous alloy containing Ni, a crystalline second underlayer formed on the first underlayer and including simple Cr or an all... | 08/02/2011 |
| 7972715 | Glass substrate and thermal-assisted magnetic recording disk A plurality of recording magnetization portions is arranged in a concentric manner around a center of a glass substrate. A plurality of non-magnetization portion having a thermal conductivity lower than that of the recording magnetization portions is formed each bet... | 07/05/2011 |
| 7972716 | Perpendicular magnetic recording medium A magnetic recording medium exhibiting a high recording density performance is disclosed. The perpendicular magnetic recording medium has a soft magnetic underlayer, a first seed layer, a second seed layer, an intermediate layer, a granular magnetic recording layer,... | 07/05/2011 |
| 7947385 | Magnetic storage medium and information storage device A magnetic storage medium includes a seed layer made of non-magnetic and amorphous Co—Cr—W, an intermediate layer having a crystalline structure, which is made of a non-magnetic material on the seed layer and has a c-axis oriented in a thickness direction of the... | 05/24/2011 |
| 7901803 | Perpendicular magnetic recording medium, manufacturing method therefor, and magnetic read/write apparatus using the same A perpendicular magnetic recording medium includes: a substrate; at least one underlayer formed above the substrate; and a perpendicular magnetic recording layer formed above the at least one underlayer, an easy magnetization axis of the perpendicular magnetic recor... | 03/08/2011 |
| 7892664 | Magnetic recording media having a chemically ordered magnetic layer A thin film structure having a magnetic layer and a seed layer positioned adjacent to the magnetic layer is provided. The seed layer includes a L10 structure. ... | 02/22/2011 |
| 7879468 | Magnetic recording media and method of manufacture of the same 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 ex... | 02/01/2011 |
| 7875371 | Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular... | 01/25/2011 |
| 7871718 | Perpendicular magnetic recording medium and magnetic storage apparatus A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer inclu... | 01/18/2011 |
| 7862915 | Magnetic recording medium and magnetic recording/reproducing apparatus According to one embodiment, a multilayered underlayer including a first underlayer containing Cu aligned in a (111) plane and a second underlayer formed on the Cu underlayer and containing Cu and nitrogen as main components is formed. ... | 01/04/2011 |
| 7862916 | Perpendicular magnetic recording medium and magnetic storage device The perpendicular magnetic recording medium includes a non-magnetic underlayer composed of Ru or an Ru alloy having a columnar structure in which crystalline particles are isolated from each other by a space, a non-magnetic granular layer provided on the non-magneti... | 01/04/2011 |
| 7833640 | Intermediate tri-layer structure for perpendicular recording media An improved structure for the construction of perpendicular recording media is disclosed. The structure includes a tri-layer IML resident between a soft under layer CoTaZr film and a CoPtCr—SiO2 magnetic media. In an embodiment, the tri-layer comprises ... | 11/16/2010 |
| 7829208 | Chromium nitride layer for magnetic recording medium A magnetic recording media with a multilayer structure and methods for forming the media are described. The magnetic recording media includes a substrate, an underlayer on top of the substrate and a magnetic layer over the underlayer. The underlayer includes a CrN f... | 11/09/2010 |
| 7824785 | Perpendicular magnetic recording medium and magnetic storage apparatus A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer inclu... | 11/02/2010 |
| 7799446 | Perpendicular magnetic recording medium and manufacturing method thereof, magnetic recording apparatus A perpendicular magnetic recording medium comprises a soft-magnetic backing layer formed on a substrate, an orientation control layer formed on the soft-magnetic backing layer, a first foundation layer of a continuous film of Ru or a Ru alloy formed on the orientati... | 09/21/2010 |
| 7767322 | Perpendicular magnetic recording medium, method of producing the same, and magnetic storage device A perpendicular magnetic recording medium is disclosed that includes a recording layer having a columnar granular structure possessing an appropriate diameter distribution and uniform arrangement of magnetic particles. The perpendicular magnetic recording medium inc... | 08/03/2010 |
| 7722967 | Recording medium comprising laminated underlayer structures A perpendicular recording medium having an underlayer structure that improves the microstructural properties of the recording layer. A spacer layer is intercalated between the lower and upper hcp metal layers. This results in improvements in microstructure of the up... | 05/25/2010 |
| RE41282 | Perpendicular magnetic recording medium and a method of manufacturing the same A perpendicular magnetic recording medium has a granular magnetic layer and a nonmagnetic underlayer of a metal or an alloy having a hexagonal close packed (hcp) crystal structure. A seed layer of a metal or an alloy of a face-centered cubic (fcc) crystal structure ... | 04/27/2010 |
| 7666531 | Perpendicular magnetic recording medium and magnetic recording/reproduction apparatus At least three underlayers, i.e., a first underlayer containing, as a main component, at least one element selected from Ag, Ir, Ni, Pd, Pt, Rh, Hf, Re, Ru, Ti, Ta, Zr, Mg, and Al, a second underlayer containing Mg or Al and Si, and a third underlayer containing, as... | 02/23/2010 |
| 7662492 | Perpendicular magnetic recording medium having a multi-layer interlayer that includes BCC material Perpendicular magnetic recording media and methods of fabricating perpendicular magnetic recording media are described. The perpendicular magnetic recording medium of one embodiment includes a soft magnetic underlayer (SUL), an interlayer, and a perpendicular magnet... | 02/16/2010 |
| 7641989 | Perpendicular magnetic recording medium for high density recording and manufacturing of the same Embodiments of the invention provide a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, ... | 01/05/2010 |
| 7618722 | Perpendicular magnetic recording media and magnetic storage apparatus using the same Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is ... | 11/17/2009 |
| 7615292 | Magnetic recording medium A magnetic recording medium having a recording layer formed in a concavo-convex pattern, which can allow a head to have stable flying characteristics. The recording layer is formed in a concavo-convex pattern, and concave portions of the concavo-convex pattern of th... | 11/10/2009 |
| 7601444 | Perpendicular magnetic recording medium A perpendicular magnetic recording medium includes: a substrate; a soft magnetic film formed on the substrate; a non-magnetic film including an amorphous interlayer formed on the soft magnetic film and made from a metallic material selected from terbium, gadolinium,... | 10/13/2009 |
| 7592081 | Magnetic recording medium and magnetic storage device A magnetic recording medium is disclosed that is able to increase a coercive force Hc of a recording layer and improve a signal-to-noise ratio of the recording layer without degradation of a thermal fluctuation resistance of the recording layer, and enables high den... | 09/22/2009 |
| 7588843 | Magnetic recording medium and method of making the same A magnetic recording medium includes a continuous recording layer, and a seed layer including a surface held in contact with the recording layer. The seed layer includes an oxidized region and a non-oxidized region in the surface held in contact with the recording l... | 09/15/2009 |
| 7566507 | Magnetic recording medium, magnetic storage apparatus and method of producing magnetic recording medium A magnetic recording medium is provided with an hcp Co alloy magnetic layer with the crystallographic c-axes tilted at an angle from a substrate surface and fixed relative to a recording direction. The tilt is induced by epitaxial growth of the hcp Co alloy on an ob... | 07/28/2009 |
| 7521137 | Patterned thin films and use of such films as thermal control layers in heat assisted magnetic recording media Patterned thin films comprise regions of relatively low thermal conductivity material separated by regions of relatively high thermal conductivity material. The low thermal conductivity regions may be provided in the form of cylinders or cuboids which are arranged i... | 04/21/2009 |
