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| Number | Title | Issue Date |
| 7449790 | Methods and systems of enhancing stepper alignment signals and metrology alignment target signals Methods and systems of enhancing stepper alignment signals and metrology alignment target signals. In one embodiment, a plurality of alternating rows comprising a first material of a first height and a second material of a second height are constructed. The first ma... | 11/11/2008 |
| 7342735 | Method of writing patterns onto a recording disk, and data storage device Embodiments of the invention relate to writing servo patterns having aligned phases onto a recording disk in a process to write the servo patterns onto the disk. In one embodiment, time aligned patterns are written onto a magnetic disk on the basis of time intervals... | 03/11/2008 |
| 7088561 | Method of making a tunnel valve sensor with improved free layer sensitivity A tunnel junction having reduced free layer coercivity for improved sensitivity. The tunnel valve has a free layer that has been deposited in the presence of a nitrogen gas, which reduces the coercivity of the free layer, thereby improving the sensor's sensitivity a... | 08/08/2006 |
| 6927941 | Disk drive disk with landing zone having textured and untextured regions A disk storage medium and a disk drive which reduce friction during landing of the head/slider is described. The minimum fly height area of the head/slider is positioned over a texture free portion of the landing zone on the disk surface landing. In a preferred embo... | 08/09/2005 |
| 6920012 | Magnetic wear debris collector for air bearing of a spindle motor in a hard disk drive A method and apparatus for providing magnetic wear debris collection for an air bearing of a spindle motor in a hard disk drive is disclosed. A magnetic ring is provided near one end of the journal bearing forming an air bearing. In addition, the mating surface of t... | 07/19/2005 |
| 6906893 | Magnetic head coil and structure for protecting same during pole notch processing A system and method are provided for manufacturing a magnetic head. Initially, a coil structure, a first pole layer, and a gap layer are formed. A second pole layer is then deposited to form a pair of flanking portions flanking a central portion of the second pole l... | 06/14/2005 |
| 6868515 | Formatting method and apparatus for a direct access storage device A system and method for transferring data between a read/write transducer and a data storage medium involves encoding a first set of data blocks of a data field according to a first coding constraint for storage on the data storage medium. The data blocks have a pre... | 03/15/2005 |
| 6850378 | Method and apparatus for providing quadrature biasing for coupled-pair circuits A method and apparatus for providing quadrature biasing for coupled-pair circuits. A QBCP-circuit for quadrature amplifiers provides a new input common-mode sense point that separates the inputs for the differential-and-common mode feedback-control loops. The QBCP c... | 02/01/2005 |
| 6833978 | Micro-actuator integrated lead suspension head terminations A technique for electrically interconnecting a disk drive suspension assembly and a micro-actuator mounting a transducer-carrying slider. A first set of termination pads is provided on a generally planar surface of the micro-actuator, adjacent a front edge portion o... | 12/21/2004 |
| 6801396 | Substrate independent superpolishing process and slurry The present invention utilizes a combination of chemical and mechanical finishing processes to polish a disk substrate surface to near atomic smoothness. Broadly speaking, the surface of a disk substrate that has been machined (i.e., rough ground) to a predetermined... | 10/05/2004 |
| 6785094 | Weld free high performance laminate suspension A suspension assembly is designed to carry a slider and read/write head elements in a magnetic data storage device. The suspension assembly is formed from a composite laminate structure that includes first, second, third, fourth and fifth material layers. The layers... | 08/31/2004 |
| 6778343 | Method, apparatus and storage system having storage media with different track pitch based upon a width of a write element associated therewith A method and apparatus is disclosed for providing a track pitch on a recording surface that is associated with the width of the tracks written by the write element of a head therefore reducing the number of heads that are discarded when a fixed relationship between ... | 08/17/2004 |
| 6760175 | Adaptive actuator radial positioning to extend magnetic disk drive longevity In a rigid magnetic disk drive data storage device, the protective lubricant coating on the magnetic disk migrates toward the outer diameter during operation with the result that the radially inward portions of the data surface become depleted. Further, the depletio... | 07/06/2004 |
| 6760184 | Compact servo pattern optimized for M-R heads A disk drive system has a servo pattern with bursts that are recorded without multiple passes per burst and without trimming, so that the servo pattern bursts have the same width as the data tracks. The servo write steps occur in partial data track pitch (DTP) incre... | 07/06/2004 |
| 6736705 | Polishing process for glass or ceramic disks used in disk drive data storage devices Disk substrates are polished in a process which uses a single load of the disks to a polishing apparatus and a single polishing slurry. Preferably, the process varies at least one polishing parameter at multiple stages to achieve both a reasonable rate of removal du... | 05/18/2004 |
| 6714382 | Self-limiting wear contact pad slider and method for making the same The present invention provides a non-actuatable, self-limiting wear contact pad slider and method for making the same. A protruding element surrounding the transducer is fabricated using a third etch step so that the protruding element has a height that is greater t... | 03/30/2004 |
| 6712985 | Method and apparatus for the manufacture of thin film magnetic transducers using a compliant, soft lapping process A method and apparatus for the manufacture of thin film magnetic transducers using a compliant pad or mat or surface in a lapping process is disclosed. The lapping process is applied to heads to eliminate both ductile element connections between the MR and shields a... | 03/30/2004 |
| 6687092 | Pivot bearing assembly for compensating for disk drive actuator tilt A disk drive pivot assembly design has a shaft that supports two actuators. The pivot assembly design compensates for the tilting of the actuators due to shaft bending during seek operations. Two types of bearings of differing stiffness are used to achiev... | 02/03/2004 |
