Abstract: A base plate includes a base body including a bottom plate and a pivot post, and an electrodeposition coating film. The bottom plate extends perpendicular to a first axis, a rotation axis of the disk, and a second axis, a swing axis of a head; and, when viewed from an axial direction, has a rectangular shape with a first direction as a short side direction and a second direction as a long side direction. The pivot post protrudes upward from an upper surface of the bottom plate at a position overlapping the second axis. The bottom plate has a thin bottom arranged in a radially outward direction orthogonal to the second axis of the pivot post and including at least one of a lower recess recessed upward from a lower surface of the bottom plate and an upper recess recessed downward from the upper surface of the bottom plate.

Abstract: A process of assembling a voice coil motor (VCM), such as for a hard disk drive, includes creating an opening in a yoke, attaching a primary magnet to an inside surface of the yoke, installing through the opening in the yoke a cross-flux magnet into a channel of the primary magnet, and installing a plug into the opening in the yoke. Thus, part count is minimized and the manufacturing process is readily incorporated into existing VCM manufacturing processes.

Abstract: Provided are a magnetic recording heading having a magnetic film including a write gap, in which in the write gap, a recording surface-side gap width is narrower than a back surface-side gap width, and the write gap has an opening portion formed by ion beam processing at a gap end portion on a recording surface side, a magnetic recording apparatus including the magnetic recording head, a manufacturing method of the magnetic recording head, and a manufacturing method of a magnetic recording medium having a servo pattern, including forming a servo pattern on the magnetic recording medium by the magnetic recording head.

Abstract: An embodiment method includes rectifying a back electromotive force of a spindle motor in a hard disk drive and energizing a voice coil motor in the hard disk drive using the rectified back electromotive force of the spindle motor via a voice coil motor power stage to retract a head of the hard disk drive to a park position. The head is retracted by moving the head towards the park position during a first retract phase and retaining the head in the park position during a second retract phase by applying a bias voltage to the voice coil motor power stage during a bias interval of the second retract phase. The method also includes producing a saturation signal indicative of onset of saturation in the voice coil motor power stage and controlling the bias voltage during the second retract phase.

Abstract: According to an embodiment, a magnetic disk device includes a first component and a second component. The first component operates at a voltage of a first value. The second component is connected to the first component by a power line for transmitting power to the first component, and operates at a voltage of a second value. In response to supply of the voltage of the second value, the second component outputs a voltage of a third value smaller than the first value to the power line and measures a fourth value, which is a value of current flowing through the power line. The second component starts output of the voltage of the first value to the power line when the fourth value is smaller than the first threshold, and stops output of the voltage to the power line when the fourth value is larger than the first threshold.

Abstract: According to one embodiment, a magnetic head includes first and second magnetic poles, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a first nonmagnetic layer provided between the first and second magnetic layers, a second nonmagnetic layer provided between the second magnetic layer and the second magnetic pole, and a third nonmagnetic layer provided between the first magnetic pole and the first magnetic layer. The first magnetic layer includes a first element including at least one of Fe, Co, or Ni. The second magnetic layer includes (Fe100-xCox)100-yEy. A second element E includes at least one selected from the group consisting of Cr, V, Mn, Yi, and Sc. The first magnetic layer does not include the second element.

Abstract: The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.

Abstract: The present invention relates to an information storage medium and a method for long-term storage of information comprising the steps of: providing a ceramic substrate; coating the ceramic substrate with a layer of a second material different from the material of the ceramic substrate, the layer having a thickness no greater than 10 ?m; tempering the coated ceramic substrate to form a writable plate or disc; encoding information on the writable plate or disc by using a laser and/or a focused particle beam to manipulate localized areas of the writable plate or disc.

Abstract: The present disclosure generally relates to a magnetic recording head comprising a spintronic device. By electrically coupling the side shielding of the head (acting as current leads) to the spin Hall layer of the spintronic device, the current path length is optimally provided across the spin Hall layer as well as fitting within the space constraints of the overall head. In addition, by using an antiferromagnetic insulator as a spacer between the spin Hall layer and the magnetic spin torque layer of the spintronic device, electrically shunting into the magnetic spin torque layer is reduced, maximizing the spin torque and reducing loss of efficiency due to shunting. Thus, the magnetic recording head may utilize the energy assistance from the spintronic device without reducing the quality and reliability of the write head by running an undesirable current through critical components of the write head.

Abstract: A gas replenishment component for an electronic enclosure is described. A main body defines a containment volume. The main body is sealed about the containment volume. A charging gas is contained in the containment volume. The containment volume has less than 5% N2. The main body defines a diffusive area that is permeable to the gas. A reversible seal obstructs the diffusive area.

Abstract: According to one embodiment, a disk device includes a plurality of recording media each including a recording layer and an actuator assembly including an actuator block rotatably supported around a rotation shaft, a plurality of arms extending from the actuator block, and suspension assemblies respectively attached to the arms and supporting respective magnetic heads. Of the plurality of arms, at least one arm has vibration characteristics different from those of the other arms.

Abstract: The present disclosure generally relates to a head assembly in a data storage device. The data storage device may include magnetic media embedded in the device or magnetic media from an insertable cassette or cartridge (e.g., in an LTO drive), where the head assembly reads from and writes to the magnetic media. During device operation, the magnetic media moves across the head assembly. The magnetic media experiences higher contact stress at certain points or portions of the head assembly. A sensor guard is coupled to the head assembly. The sensor guard comprises at least one chamfered surface or at least one stepped surface to decrease the contact stress between the magnetic media and the head assembly during device operation. The at least one chamfered or stepped surface may be disposed on a leading edge of the sensor guard.

Abstract: A magnetoresistance effect element includes: a first ferromagnetic layer; a second ferromagnetic layer; and a non-magnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, wherein at least one of the first ferromagnetic layer and the second ferromagnetic layer includes a first layer and a second layer in order from the side closer to the non-magnetic layer, the first layer contains a crystallized Co-based Heusler alloy, at least a part of the second layer is crystallized, the second layer contains a ferromagnetic element, boron element and an additive element, and the additive element is any element selected from a group consisting of Ti, V, Cr, Cu, Zn, Zr, Mo, Ru, Pd, Ta, W, Ir, Pt, and Au.

Abstract: Systems and methods, e.g., optical apparatuses, for digital optical information storage systems that improve the speed, signal to noise, controllability, and data storage density for fluorescent and reflective multilayer optical data storage media. The systems and methods include an optical system for a reading beam of a data channel from a moving single or multi-layer or otherwise 3-dimensional optical information storage medium that comprises at least one optical element characterized by restricting the field of view (FOV) of the reading beam on an associated image plane to 0.3 to 2 Airy disk diameters in a first direction.

Abstract: The present disclosure generally relates to a storage device comprising soft bias structures having high coercivity and high anisotropy, and a method of forming thereof. The soft bias structures may be formed by moving a wafer in a first direction under a plume of NiFe to deposit a first NiFe layer at a first angle, moving the wafer in a second direction anti-parallel to the first direction to deposit a second NiFe layer at a second angle on the first NiFe layer, and repeating one or more times. The soft bias structures may be formed by rotating a wafer to a first position, depositing a first NiFe layer at a first angle, rotating the wafer to a second position, depositing a second NiFe layer at a second angle on the first NiFe layer, and repeating one or more times. The first and second NiFe layers have different grain structures.

Abstract: A trace gimbal is described herein. In some embodiments, the trace gimbal includes outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal. The front outrigger includes a distal front outrigger and a proximal front outrigger. The rear outrigger includes a distal rear outrigger and a proximal rear outrigger. A middle strut extends in a width direction of the trace gimbal, adjoining the proximal front outrigger to the rear outrigger, and connecting to a slider tongue. The front outrigger includes a strut form bent away from a load beam reference plane at an angle ?. In some embodiments, the outer struts include a second strut form disposed on the rear outrigger. The second strut form can be bent toward the load beam reference plane at the angle ?.

Abstract: According to one embodiment, a magnetic head includes a slider including an air bearing surface which includes a plurality of uppermost surfaces each constituting a pressure generating surface and a plurality of other surfaces different in height from the uppermost surfaces, an inflow end, and an outflow end, and a head portion provided at the outflow end. The air bearing surface includes a negative pressure generating groove, a leading pad having the uppermost surface, and a trailing pad having the uppermost surface. The uppermost surface in a region between a tip portion of the trailing pad and the outflow end includes only the trailing pad.

Abstract: Provided is an optical disc drive that can implement a conveying roller position manipulation mechanism, a centering mechanism, and a chucking pulley operation mechanism, while allowing the number of components to be reduced. A base frame includes a spindle motor and an optical element. An inner case houses the base frame, and supports a conveying mechanism configured to convey an optical disc to the position of the spindle motor. An outer case houses the inner case. The base frame is fixed in the inner case via a first damper, and the inner case is fixed in the outer case via a second damper.

Abstract: Provided is a glass for a magnetic recording medium substrate or for a glass spacer for a magnetic recording/reproducing apparatus, in which the total content of Li2O, Na2O, K2O, B2O3, and ZnO (Li2O+Na2O+K2O+B2O3+ZnO) is in a range of 0 mol % or more and 3 mol % or less, the mole ratio of the total content of Al2O3 and MgO relative to the total content of SiO2 and CaO [(Al2O3+MgO)/(SiO2+CaO)] is in a range of 0.30 or more and 0.6 or less, the total content of SiO2 and Al2O3 (SiO2+Al2O3) is in a range of 64 mol % or more and 85 mol % or less, and the total content of SiO2, Al2O3, MgO, and CaO (SiO2+Al2O3+MgO+CaO) is in a range of 87 mol % or more and 98 mol % or less.

Abstract: A data storage chassis includes a plurality of data storage cartridges, and printed circuit board assembly (PCBA) electronics selectively connectable to one or more of the plurality of data storage cartridges. The data storage chassis also includes a wireless interface controller communicatively coupled to the PCBA electronics. The wireless interface controller facilitates wireless communication of data between the data storage chassis and a host using at least one frequency in a range of frequencies including fifth-generation (5G), millimeter, and sub-millimeter frequency ranges.