| HOYA MAGNETICS SINGAPORE PTE. LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100323221 | MAGNETIC DISK AND MAGNETIC DISK MANUFACTURING METHOD - Provided is a magnetic disk ( | 12-23-2010 |
| 20100323220 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium includes a magnetic recording layer | 12-23-2010 |
| 20100279151 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, a pre-underlayer, an underlayer, and a main recording layer serving as a magnetic recording layer. The pre-underlayer contains seed crystal grains that serve as a base for crystal grains of the underlayer, and an addition substance that is added between the seed crystal grains and composed of an element having an atomic radius smaller than that of an element forming the seed crystal grains. | 11-04-2010 |
| 20100255348 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium | 10-07-2010 |
| 20100247965 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - In a perpendicular magnetic recording medium having, over a substrate, a magnetic recording layer, an underlayer made of Ru or a Ru compound and provided below the magnetic recording layer, a pre-underlayer made of a nonmagnetic crystalline material, and a soft magnetic layer provided below the pre-underlayer, when the difference between the highest point and the lowest point of unevenness of the interface between the soft magnetic layer and the pre-underlayer, derived by a cross-sectional TEM image, is given as an interface roughness (nm) and the distance between the soft magnetic layer and the magnetic recording layer, excluding the soft magnetic layer and the magnetic recording layer, is given as a SUL-MAG distance (nm), interface roughness (nm)≦0.4 (nm) and interface roughness×SUL-MAG distance (nm)≦12 (nm) are satisfied. | 09-30-2010 |
| 20100247964 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium comprises a magnetic recording layer that records a signal, an underlayer formed of Ru or Ru compound below the magnetic recording layer, a non-magnetic layer formed of a non-magnetic material below the underlayer to control crystal orientation of the underlayer, a soft magnetic layer provided below the non-magnetic layer, and a substrate on which the magnetic recording layer, the underlayer, the non-magnetic layer, and the soft magnetic layer are formed. The non-magnetic layer comprises a first non-magnetic layer formed above the soft magnetic layer and a second non-magnetic layer formed above the first non-magnetic layer. The first non-magnetic layer is formed of amorphous Ni compound while the second non-magnetic layer is formed of crystalline Ni or crystalline Ni compound. | 09-30-2010 |
| 20100247963 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium is used for information recording of a perpendicular magnetic recording type. The perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, and a magnetic layer having a multilayered structure including a plurality of magnetic layers. The soft magnetic layer, the underlayer, and the magnetic layer are formed on the substrate. At least one of the magnetic layers includes CoPt magnetic grains containing oxide. The oxide includes at least one material selected from the group consisting of SiO | 09-30-2010 |
| 20100246064 | LUBRICANT COMPOUND FOR A MAGNETIC DISK, MAGNETIC DISK, AND METHOD OF MANUFACTURING THE SAME - In a magnetic disk has at least a magnetic layer, a carbon-based protective layer, and a lubricating layer formed in this order over a substrate, the lubricating layer contains a lubricant compound including a compound which has a perfluoropolyether main chain in a structure thereof, an aromatic group located at a position except each end of a molecule thereof, and a polar group at each end of the molecule. | 09-30-2010 |
| 20100215992 | SINGLE-SIDED PERPENDICULAR MAGNETIC RECORDING MEDIUM - A magnetic recording medium used for perpendicular magnetic recording, the magnetic recording medium comprising: a substrate having a first surface and a second surface opposite to the first surface; a magnetic recording medium constituent layer formed on the first surface of the substrate, the magnetic recording medium constituent layer including at least a magnetic recording layer; a non-magnetic metal film formed on the second surface of the substrate; and a carbon-based protective film formed on the non-magnetic metal film. | 08-26-2010 |
| 20100209740 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - [Object] The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR. | 08-19-2010 |
| 20100209601 | METHOD OF MANUFACTURING A MAGNETIC DISK - On manufacturing a magnetic disk having at least a magnetic layer ( | 08-19-2010 |
| 20100196740 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD OF THE SAME - A perpendicular magnetic recording medium of the invention is characterized by having, on a disk substrate | 08-05-2010 |
| 20100196619 | MAGNETIC DISK AND MANUFACTURING METHOD THEREOF - In a magnetic disk having a magnetic layer, a protection layer, and a lubrication layer formed on a substrate in this order, a surface free energy γS of a surface of the magnetic disk derived by an extended Fowkes equation is greater than 0 and no greater than 24 mN/m. γSd (dispersion force component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 17 mN/m, γSp (dipole component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 1 mN/m, and γSh (hydrogen bonding force component of surface free energy) forming the surface free energy γS is greater than 0 and no greater than 6 mN/m. | 08-05-2010 |
| 20100119878 | 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 provided with an orientation control layer ( | 05-13-2010 |
| 20100112379 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A vertical magnetic recording disc ( | 05-06-2010 |
| 20100039724 | MAGNETIC RECORDING MEDIUM - In order to provide a magnetic recording medium having excellent electromagnetic conversion characteristics, a magnetic recording medium ( | 02-18-2010 |
| 20090287335 | PROCESSING DATA MANAGING SYSTEM, PROCESSING SYSTEM, AND PROCESSING DEVICE DATA MANAGING METHOD - A processing data managing system includes: a processing device | 11-19-2009 |
| 20090202866 | VERTICAL MAGNETIC RECORDING DISK MANUFACTURING METHOD AND VERTICAL MAGNETIC RECORDING DISK - In a method of manufacturing a magnetic disk including at least a magnetic recording layer on a substrate | 08-13-2009 |
| 20090191331 | PERPENDICULAR MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD - [Object] To provide a manufacturing method that can easily enhance a reversed domain nucleation magnetic field of a magnetic recording layer in a perpendicular magnetic recording medium having, over a substrate, a soft magnetic layer, the magnetic recording layer having a granular structure, and a continuous layer having a high perpendicular magnetic anisotropy. | 07-30-2009 |
| 20090169922 | MAGNETIC DISK MANUFACTURING METHOD AND MAGNETIC DISK - In a method of manufacturing a magnetic disk including at least a substrate | 07-02-2009 |
| 20090117408 | PERPENDICULAR MAGNETIC RECORDING DISK AND METHOD OF MANUFACTURING THE SAME - To provide a perpendicular magnetic recording disk having a film structure that improves overwrite characteristics (O/W) while maintaining a coercive force (Hc) high enough not to affect heat fluctuation resistance, and a manufacturing method thereof. | 05-07-2009 |
| 20080268294 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk - A protection layer containing carbon as a major component is deposited by plasma CVD. The protection layer has film quality such that, when a spectrum is obtained by excluding photoluminescence from a Raman spectrum in a wavenumber band from 900 cm | 10-30-2008 |
