Abstract: 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.

Abstract: 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.

Abstract: FePt-based perpendicular magnetic recording (PMR) media including an ordering temperature reducing layer between a bottom FePtX magnetic recording layer and a nucleation layer. In one embodiment, an ordering temperature reducing layer of carbon is employed to lower the L10 ordering temperature of a FePtC recording layer.

Abstract: A fluid flow method and apparatus are described. The apparatus includes a trough coupled between tanks to provide an air flow down between the tanks.

Abstract: Methods of cleaning one or more workpieces are described. A method includes oscillating workpieces while performing a cleaning operation (e.g., sonication, rinse, etc.) and dwelling the workpieces at one or more oscillation positions (e.g., an upper oscillation position, an lower oscillation position, or an intermediate oscillation position) for corresponding one or more dwell time periods.

Abstract: A sputtering system includes a first sputtering assembly configured to sputter material onto a first disk and a second sputtering assembly configured to sputter material onto a second disk, the second sputtering assembly positioned proximate the first sputtering assembly. The first sputtering assembly includes a first magnetic ring, and the second sputtering assembly includes a second magnetic ring. The first magnetic ring includes a first region of lower relative magnetic strength positioned near the second magnetic ring, and the second magnetic ring includes a second region of lower relative magnetic strength positioned near the first magnetic ring.

Abstract: Cross-track density capability is predicted for a large number of writes based on a plurality of erase band width measurements. Over the plurality of erase band width measurements, a number of writes in a series of writes performed as part of an aggressing track sequence is varied. A model of the magnetic track width (MTW) as function of the number of writes employed in the MTW measurements may be generated and an estimate of the erase band width for a large number of writes derived from the model as a prediction of cross-track density capability.

Abstract: A wide area track erasure (WATER) rate of change is determined from a model generated from a plurality of track erasure measurements performed on a magnetic recording media. A model of the change in noise amplitude for an off-track position as a function of the number of aggressor track writes employed in the track erasure measurements is generated. In a log-linear space a linear fit of the change in noise amplitude with respect to the number of aggressor track writes yields a rate of noise amplitude change (dB/decade) which may be utilized to rank magnetic recording media.

Abstract: 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, X1 and X2, wherein X1 comprises one or more elements selected from the group consisting of Ag, Au, B, Cr, Cu, Ga, In, Mn, Mo, Nb, Pb, Sb, Se, Sn, Te, W, Zn and Zr, and wherein X2 comprises either B or P, and wherein X1 and X2 do not comprise the same elements.

Abstract: 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.

Abstract: An imprint embossing alignment system. In one embodiment, the system includes a die having a bottom surface, an embossing foil positioned above the bottom surface, and a mandrel, to receive the substrate, having a rod portion that extends through a central portion of the die. The system also includes a ball bushing positioned around the rod portion and a ring portion positioned between the ball bushing and the embossing foil to hold a precise alignment of a centerline of the rod portion and a centerline of the embossing foil.

Abstract: A disk processing system with a corner chamber having a heater assembly and a carrier rotary assembly configured to rotate the heater assembly.

Abstract: 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.

Abstract: A disk drive having a magnetic recording disk with a transition zone is described. A surface texture of the transition zone induces the head to fly at a greater height than when operating over a data zone, while transitioning the head to a landing zone to park.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A magnetic disk 10 for use in perpendicular magnetic recording, which includes an underlayer 18, a size-reduction promoting layer 20 (nonmagnetic granular layer) of a granular structure, and a magnetic recording layer 22 having a ferromagnetic layer 32 of a granular structure. The size-reduction promoting layer 20 has an inorganic oxide matrix and nonmagnetic metal crystal grains and is disposed between the underlayer 18 and the ferromagnetic layer 32, thereby reducing the size of magnetic crystal grains in the ferromagnetic layer 32.

Abstract: Drying of wet workpiece, such as a magnetic recording media, following a wet clean process where the wet workpiece is displaced from a liquid volume into a gaseous volume at a pull speed that is dependent on the temperature of the gaseous volume.

Abstract: 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.