WD MEDIA, INC. Patent applications |
Patent application number | Title | Published |
20140234666 | LUBRICANTS COMPRISING PFPE TERMINATED WITH BENZENE OR FUNCTIONAL BENZENE END GROUPS FOR MAGNETIC RECORDING MEDIA STRUCTURE - A novel lubricant comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule for a magnetic recording media structure is disclosed. The magnetic recording media structure includes a substrate, a magnetic recording layer for recording information disposed over the substrate, a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer, and a lubricant layer disposed over the protective overcoat layer and comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule. | 08-21-2014 |
20140151360 | HEATER ASSEMBLY FOR DISK PROCESSING SYSTEM - A heater assembly for a disk processing system including a heater element configured to heat a substrate carried by a holder, and a heater cover having an aperture to expose the heater element to the substrate. The cover may be metal to thermally couple the heater to a cooling plate. The cover may have an outer surface having a thermal barrier surrounding the aperture to thermally insulate the holder. | 06-05-2014 |
20140050843 | DUAL SINGLE SIDED SPUTTER CHAMBERS WITH SUSTAINING HEATER - A disk processing system having a heater chamber and dual single-sided sputter chambers each with a sustaining heater. | 02-20-2014 |
20130314815 | UNDERLAYERS FOR HEAT ASSISTED MAGNETIC RECORDING (HAMR) MEDIA - Various embodiments provide for a heat assisted magnetic recording (HAMR) media comprising: a magnetic recording layer; a barrier layer disposed under the magnetic recording layer; a first underlayer disposed under the barrier layer; and an amorphous seedlayer disposed under the first underlayer. For some embodiments, the recording medium may comprise: a magnetic recording layer including FePt alloy, a CoPt alloy, or a FePd alloy; a barrier layer including MgO, TiC, TiN, CrN, TiCN, β-WC, TaC, HfC, ZrC, VC, NbC, or NiO; a first underlayer including RuAl-oxide, NiAl, FeAl, AlMn, CuBe, or AlRe; or an amorphous seedlayer including a Cr—X alloy, where X comprises Al, B, C, Cu, Hf, Ho, Mn, Mo, Ni, Ta, Ti, V, W, or Ru. | 11-28-2013 |
20130165029 | SYSTEMS FOR RECYCLING SLURRY MATERIALS DURING POLISHING PROCESSES - Systems for recycling slurry materials during polishing processes are provided. One system includes a polisher having an inlet and drain outlet, and a slurry storage tank to supply a slurry including a preselected material to the polisher inlet, and a recycling assembly including a cross flow filter including an inlet to receive a waste slurry including the preselected material from the polisher drain outlet, where the cross flow filter is configured to concentrate the preselected material in an outlet slurry, a density meter configured to measure a concentration of the preselected material in the filter outlet slurry, a valve coupled to the filter outlet and configured to supply the slurry storage tank, and a controller coupled to the density meter and valve, where the controller is configured to open the valve when the concentration of the preselected material reaches a first concentration threshold. | 06-27-2013 |
20130071694 | INTERLAYERS FOR MAGNETIC RECORDING MEDIA - Embodiments of the present invention include a recording medium comprising: a hard magnetic recording layer and an interlayer disposed under the hard magnetic recording layer, wherein the interlayer comprises an upper layer of Ru-based alloy and a lower layer of RuCo or ReCo alloy. Generally for embodiments of the present invention, the lower layer of RuCo or ReCo alloy is formed over a seed layer using a low-pressure sputter process, and the upper layer of Ru-based alloy is formed over the lower layer using a high-pressure sputter process. | 03-21-2013 |
20120308722 | METHODS FOR IMPROVING THE STRENGTH OF GLASS SUBSTRATES - Methods for improving the strength of glass substrates are described. One such method for strengthening a glass disk substrate for a storage device includes immersing at least a portion of the glass substrate in a solution, the solution including a solvent and a coating material selected from the group consisting of NaOH, KOH, and KNO | 12-06-2012 |
20120300327 | SYSTEM AND METHOD FOR IMPROVING HEAD POSITIONING - Systems and methods for improving accuracy of head positioning using existing servo patterns are provided. In one embodiment, a method for improving read head positioning is provided that comprises: writing a series of tracks over a range of read offsets to be calibrated; measuring a set of raw track profiles from the series of tracks; sampling the set of raw track profiles at a series of signal amplitude levels; constructing a reference track profile from the set of sampled track profiles; calculating a set of read offset deltas from each sampled track profile; merging the sets of read offset deltas into a set of average read offset deltas; and converting the set of average read offset deltas into a read offset correction table. A similar method for improving disk write head positioning is also provided which utilizes such a read offset correction table to eventually create write offset correction table. | 11-29-2012 |
20120251846 | RECORDING MEDIA WITH MULTIPLE EXCHANGE COUPLED MAGNETIC LAYERS - A magnetic recording (PMR) disk structure is described. The PMR disk structure may include a magnetic capping layer being substantially free of an oxide, an upper magnetic layer with an oxide content disposed directly below and in contact with the magnetic capping layer, and an upper exchange coupling layer disposed below the upper magnetic layer. | 10-04-2012 |
20120251842 | LOW ROUGHNESS HEATSINK DESIGN FOR HEAT ASSISTED MAGNETIC RECORDING MEDIA - A magnetic recording medium comprises a substrate; a heatsink layer comprising a layer of crystallized CuTi; and a hard magnetic recording layer. The crystallized CuTi is applied in an amorphous state and then crystallized through heating. The use of this heatsink improves surface and underlayer roughness compared to previous heatsink designs. | 10-04-2012 |
20120034492 | ELECTROLESS COATED DISKS FOR HIGH TEMPERATURE APPLICATIONS AND METHODS OF MAKING THE SAME - A disk for a hard disk drive is provided. The disk comprises a substrate comprising aluminum, and a coating layer disposed over the substrate. The coating layer comprises an alloy of Ni, X | 02-09-2012 |
20120003062 | CORNER CHAMBER WITH HEATER - A disk processing system with a corner chamber having a heater assembly and a carrier rotary assembly configured to rotate the heater assembly. | 01-05-2012 |
20110315162 | POST POLISH DISK CLEANING PROCESS - A method for cleaning plated polished disks used in hard drive media is provided. The method includes positioning plated polished disks in a first batch scrubber having multiple first brushes, wherein each of the plated polished disks is positioned between two of the first brushes, and scrubbing the plated polished disks with the first brushes. The method further includes positioning the plated polished disks scrubbed in the first batch scrubber in a second batch scrubber having multiple second brushes, wherein each of the plated polished disks is positioned between two of the second brushes, and scrubbing the plated polished disks with the second brushes. | 12-29-2011 |
20110219389 | SPIN STAND COMPRISING A DUAL DISK CLAMP - A spin stand is disclosed comprising a spindle motor having a rotor. A first disk clamp is operable to clamp a first disk to the rotor, and a second disk clamp is operable to clamp a second disk to the rotor. An actuator is operable to clamp the second disk clamp in order to clamp the second disk to the rotor after the first disk has been clamped to the rotor. | 09-08-2011 |
20110216431 | PROCESSING DISKS ON A SPIN STAND - A method of processing disks on spin stand is disclosed, the spin stand comprising a spindle motor having a rotor. A first disk is clamped to the rotor, wherein the first disk comprises a reference servo pattern. A second disk is clamped to the rotor, and a first head is servoed over the first disk in response to the reference servo pattern in order to position a second head over the second disk at a first radial location. Data is written to the second disk at the first radial location using the second head. The second disk is removed from the rotor while the first disk remains clamped to the rotor. | 09-08-2011 |
20110153061 | Master Teaching Jig - A disk carrier for teaching disk positioning in a substrate changing system. The disk carrier composed of a panel having a disk opening configured to receive a disk and a plurality of beam sensors disposed around the disk opening to project beams parallel to a surface of the disk when secured within the disk opening. The plurality of beam sensors may be composed of at least one beam sensor on each of a front side and rear side of the panel. | 06-23-2011 |
20110104427 | GLASS SUBSTRATES AND METHODS OF ANNEALING THE SAME - A method for forming a glass substrate comprises the steps of forming a glass blank with opposing substantially planar surfaces and at least one edge, coating the glass blank in silica-alumina nanoparticles, the silica-alumina nanoparticles comprising an inner core of silica with an outer shell of alumina, annealing the coated glass blank to form a conformal coating of silica-alumina around the glass blank, and polishing the coated glass blank to remove the conformal coating of silica-alumina from the opposing substantially planar surfaces thereof. | 05-05-2011 |
20110064970 | COMPOSITE LUBRICANT FOR HARD DISK MEDIA - A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls. | 03-17-2011 |
20100300884 | ELECTRO-DEPOSITED PASSIVATION COATINGS FOR PATTERNED MEDIA - A method of fabricating a patterned magnetic recording disk is described. The method may include electrodepositing a protection layer on the magnetic recording layer of the disk. | 12-02-2010 |
20100300875 | MAGNETIC PARTICLE TRAPPER FOR A DISK SPUTTERING SYSTEM - A magnetic particle trapper for use in a sputtering system includes a roller cover plate having a plurality of openings arranged and dimensioned to accommodate a plurality of rollers associated with a mechanical transport mechanism of the sputtering system, and a plurality of magnets to trap magnetic particles, the plurality of magnets being attached to the roller cover plate in locations proximate to the plurality of openings. | 12-02-2010 |
20100079888 | ECCENTRICITY DETERMINATION FOR A DISK - Monitoring of the eccentricity of a pre-formatted servo pattern on a disk. | 04-01-2010 |
20100035085 | PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH IMPROVED MAGNETIC ANISOTROPY FIELD - A perpendicular magnetic recording medium comprising a substrate, a soft underlayer, a seed layer, a non-magnetic FCC NiW alloy underlayer, a non-magnetic HCP underlayer, and a magnetic layer. We have discovered that the combination of a seed layer comprising Ta and a NiW alloy underlayer uniquely improves media recording performance and thermal stability by achieving excellent coercivity of the thin bottom magnetic recording layer and narrow C axis orientation distribution. | 02-11-2010 |
20100024962 | COMPOSITE STAMPER FOR IMPRINT LITHOGRAPHY - A stamper having a patterned layer composed of a hard material and a compressible material back plane layer. The back plane layer may be composed of an elastomer. The stamper may be used to imprint an embossable layer disposed above a substrate for the production of a magnetic recording disk. | 02-04-2010 |