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| Number | Title | Issue Date |
| 8133530 | One magnetic sided media for low cost and low capacity applications One-sided magnetic media for a hard disk drive. Methods are implemented to create a magnetic media with only one surface capable of recording data. The second surface is a non-data recording side of the media and is constructed so that it does not interfere with the... | 03/13/2012 |
| 7943558 | Lubricant with non-terminal functional groups Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation temperature. The locations of the functional groups to the backbone of th... | 05/17/2011 |
| 7880998 | Multiple writing process for magnetic bit-patterned media Two pass writing system and method for patterned media. In a first step, a write head of a hard disk drive writes with a strong write field. In a second step, a write head of the hard disk drive writes with a weak field. In this manner, magnetic islands of patterned... | 02/01/2011 |
| 7879467 | Media for recording devices Improvements to magnetic recording device including magnetic recording media are described. The improvements include the addition of copper to the recording layer as well as improved underlayers. In addition, improved manufacturing processes and magnetic/recording p... | 02/01/2011 |
| 7862913 | Oxide magnetic recording layers for perpendicular recording media An improved structure for the construction of perpendicular recording media is disclosed. The structure includes a perpendicular recording layer with at least two oxide sublayers or a lower sublayer of a non-oxide. One structure includes an upper sublayer comprised ... | 01/04/2011 |
| 7845011 | Data transfer system and data transfer method A transfer source gives a challenge key, own public key, an ID for identifying the target data, and an encryption key type to a transfer destination that is authenticated by a certificate. In accordance with the given key type, the transfer destination generates a f... | 11/30/2010 |
| 7729088 | Magnetic disk apparatus with heating device and magnetic head slider used therefor Embodiments of the invention achieve a decrease in electric power consumption while ensuring high recording density and high reliability in a magnetic disk apparatus. In one embodiment, a magnetic disk apparatus comprises a rotatable magnetic disk and a magnetic hea... | 06/01/2010 |
| 7718282 | Magnetic recording medium with corrosion resistance and manufacturing method A magnetic recording medium with a granular magnetic recording layer excellent in corrosion resistance is provided. In one embodiment, after formation of, on a non-magnetic substrate, an NiTa adhesion layer, a soft magnetic layer, a Ta intermediate layer, an Ru inte... | 05/18/2010 |
| 7715137 | Servo patterns for patterned media Servo patterns for patterned media. The servo pattern includes specification of cylinder/track ID with and without a Gray code. The servo pattern space is minimized by the optimum usage of the islands. This is achieved by island allocation rules to take advantage of... | 05/11/2010 |
| 7704613 | Magnetic recording medium for high density recording A bit error rate is improved and, at the same time, an aging change due to thermal fluctuation is decreased. In one embodiment, a magnetic recording medium has first, second, third, and fourth magnetic layers stacked over the underlayer film on a substrate. The prod... | 04/27/2010 |
| 7701667 | Perpendicular magnetic recording medium and magnetic storage apparatus using the same Embodiments in accordance with the present invention provide a perpendicular recording medium with low noise and high recording density by reducing the effects from noise generated from the vicinity of the interface with the intermediate layer of the recording layer... | 04/20/2010 |
| 7693593 | Production planning method and production planning system Embodiments of the present invention provide a production planning method and system. Where a manufacturing apparatus is shared by a plurality of products in a production line, if a manufacturing (production) availability number is changed, a cause parameter is auto... | 04/06/2010 |
| 7691500 | Perpendicular magnetic recording medium Embodiments of the present invention help to provide an excellent perpendicular recording medium of high medium signal-to-noise (S/N) and with suppressed blurring in writing. According to one embodiment, a perpendicular recording layer is provided by way of a negati... | 04/06/2010 |
| 7683012 | Lubricant with non-terminal functional groups Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation temperature. The locations of the functional groups to the backbone of th... | 03/23/2010 |
| 7670694 | Media for recording devices Improvements to magnetic recording device including magnetic recording media are described. The improvements include the addition of copper to the recording layer as well as improved underlayers. In addition, improved manufacturing processes and magnetic/recording p... | 03/02/2010 |
| 7666530 | Perpendicular magnetic recording medium, and magnetic recording/reproducing apparatus using the same Embodiments of the invention relate to easily achieving a perpendicular magnetic recording medium with high reliability and a magnetic recording apparatus with high recording density by improving the magnetic properties and surface smoothness of the soft magnetic un... | 02/23/2010 |
| 7645528 | Magnetic recording media with ultra-high recording density An AFC magnetic recording medium having a three-layered ferromagnetic structure capable of reducing noises without deteriorating thermal stability is provided in order to achieve ultra-high recording density. In one embodiment, the AFC magnetic recording medium has ... | 01/12/2010 |
| 7645363 | Manufacturing of magnetic recording medium A magnetic recording medium having excellent fly-ability and corrosion resistance is provided in a high yield by controlling protuberant on a medium surface caused by deposition of giant silicon oxide particles, which are created during the film deposition of a gran... | 01/12/2010 |
| 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 |
| 7641774 | Manufacturing process for perpendicular magnetic recording medium A perpendicular magnetic recording medium is manufactured having excellent thermal stability and recording performances across the entire disk surface. In one embodiment, the recording layer includes at least two layers deposited by using a reactive sputtering metho... | 01/05/2010 |
| 7640131 | Data analysis method for analyzing failure root causes for products Embodiments of the present invention provide a data group for each parameter that is classified into a first group and a second group, based on the performance of the products, a base point of a distribution of the data group is calculated, based on the distribution... | 12/29/2009 |
| 7638020 | Vertical magnetic recording medium and manufacturing method thereof A magnetic recording medium of higher coercive force and a manufacturing method thereof are provided by enabling reactive sputtering of stable reproducibility even with the addition of oxygen in the formation of a magnetic film using oxygen addition type reactive sp... | 12/29/2009 |
| 7625644 | Perpendicular magnetic recording medium and manufacturing of the same In a granular magnetic recording layer of a perpendicular magnetic recording medium, media noises are reduced by separating adequately magnetic crystal grains and non-magnetic grain boundary and decreasing magnetic exchange interactions among the magnetic crystal gr... | 12/01/2009 |
| 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 |
| 7589932 | Filtered air separator for disk drive Embodiments of the invention provide a disk drive capable of reducing vibrations of a disk generated by an airflow produced as the disk rotates. In one embodiment, a disk drive comprises: a rotary magnetic disk, a base for housing the magnetic disk, a top cover for ... | 09/15/2009 |
| 7587550 | Functional test method and functional test apparatus for data storage devices Embodiments of the invention provide an HDD functional test apparatus which can test an HDD in a shorter time by increasing the amount of transfer per command without using a larger memory resource. In one embodiment, a data storage device test apparatus comprises a... | 09/08/2009 |
| 7587057 | Vibroacoustic emulator The present invention is directed towards a family of vibroacoustic emulators to simulate the vibroacoustic characteristics of components of an electronic device. Specific embodiments for simulating a hard disk drive comprise a housing and a vibroacoustic generator ... | 09/08/2009 |
| 7581123 | Recording media drive provided with a connecting pin for supply of 3.3V A recording media drive is to be provided in which, when even a voltage capable of being provided in the interior can be provided from the exterior, e.g., the voltage of 3.3V defined in Serial ATA Standard, the voltage can be supplied from the exterior. In one embod... | 08/25/2009 |
| 7580221 | Magnetic disk drive with compensation against disturbance A magnetic disk drive is to be provided wherein oscillations in thrust, conical and translational modes of a spindle caused by disturbance are to be damped to diminish a positioning error and thereby attain a high recording density and improved accessing performance... | 08/25/2009 |
| 7576945 | Disk drive with an air flow passage within enclosure to reduce flutter Turbulence of an airflow returning to a magnetic disk along the base sidewall of a HDD is reduced to thereby reduce flutter of an actuator or a magnetic disk caused by the airflow, thus improving read/write performance. An HDD according to an embodiment of the prese... | 08/18/2009 |
| 7576944 | Shielding function for magnetic head in magnetic disk device Embodiments of the invention provide a magnetic disk device capable of improving the shielding function for the magnetic head yet maintaining a form factor. In one embodiment, a magnetic disk device comprises a magnetic disk; a magnetic head for recording/reproducin... | 08/18/2009 |
| 7576937 | Disk drive and control method therefor Embodiments in accordance with the present invention provide a disk drive capable of verifying whether the speed of an actuator is true or not, the speed being detected while the actuator is being moved between a retracted position and a recording surface of a magne... | 08/18/2009 |
| 7576936 | Method of starting the magnetic disk device using fluid dynamic bearing spindle motor Embodiments of the present invention provide a magnetic disk device including a spindle motor using a fluid dynamic bearing, which can send back READY within a period requested by a host system at the time of starting a magnetic disk device under low temperature and... | 08/18/2009 |
| 7573671 | Disk device with reduced flutter Embodiments of the invention provide a disk device capable of diminishing oscillation of a disk caused by an air flow which is created with rotation of the disk. In one embodiment, a magnetic disk device comprises a rotatable magnetic disk, a base and a top cover fo... | 08/11/2009 |
| 7570460 | Boss location to adjust head attitude Embodiments of the present invention provide a structure of a pivot receiving surface which may excellently adjust the attitude of a head supporting mechanism in a magnetic disk drive. In one embodiment, three projections are formed at a base for supporting a pivot ... | 08/04/2009 |
| 7570455 | Data storage device and magnetic disk drive in hermetically sealed condition Embodiments of the present invention provide a data storage device and a magnetic disk drive capable of maintaining the inside of a base in a hermetically sealed condition. In one embodiment, a data storage device includes a recording disk, a base having a through h... | 08/04/2009 |
| 7569967 | Compact disk device and disk drive A disk device has a small size, a small thickness, a high efficiency, a small degree of vibration and a small level of noise. In one embodiment, the disk device comprises a disk for storing information and a disk drive for driving the disk. The disk drive includes a... | 08/04/2009 |
| 7564645 | Rotating disk storage device with mounting structure and enhanced fixing mechanism Embodiments of the invention provide a rotating disk storage device which has a simple mounting structure facilitating mounting thereof to a host system and is reduced in noise. In one embodiment, the rotating disk storage device includes a magnetic disk, a voice co... | 07/21/2009 |
| 7558022 | Magnetic disk apparatus with heating device and magnetic head slider used therefor Embodiments of the invention achieve a decrease in electric power consumption while ensuring high recording density and high reliability in a magnetic disk apparatus. In one embodiment, a magnetic disk apparatus comprises a rotatable magnetic disk and a magnetic hea... | 07/07/2009 |
| 7556871 | Magnetic recording medium containing first and second recording layers, each layer containing a columnar structure Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpen... | 07/07/2009 |
