Abstract: A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.

Abstract: Disclosed herein is a magnetic storage device that comprises a suspension arm co-movably fixed to a carriage arm. The suspension arm comprises a slider attachment side and at least one first electrical contact pad on the slider attachment side. The suspension arm also comprises a slider co-movably fixed to the suspension arm. The slider comprises a suspension attachment side, a non-head side facing the suspension arm and intersecting the suspension attachment side at a first slider edge of the slider, a head side facing away from the suspension arm, and at least one electrical contact component on the suspension attachment side up to the first slider edge. At least one solder weldment is directly coupled to the at least one first electrical contact pad and the at least one electrical contact component. Additionally, a read-write head is coupled to the head side of the slider.

Abstract: A tonearm including an elongate member, a suspension means, a protrusion and a contact surface. The suspension means suspends the elongate member (8a; 8b; 8c; 8d; 8e) in an approximately horizontal position. The weight of the elongate member is substantially supported by the suspension means. The protrusion is arranged in opposing contact with the contact surface at a contact point, such that action of a drag force substantially parallel to the length of the elongate member urges the contact surface and the protrusion into opposing contact, thereby producing a contact force which resists the drag force. By separating the means for supporting the weight of the elongate member and the means for resisting a drag force acting along the length of the elongate member, the drag force can be more effectively resisted thus providing a tonearm with improved properties.

Abstract: A voice coil motor (VCM) includes a coil, and on a first side a first yoke having a coil-side facing the coil, a first low-coercivity permanent magnet positioned between the coil and the coil-side of the first yoke and having a yoke-side facing the first yoke and a coil-side opposing the yoke-side, and a first high-coercivity permanent magnet adjoining the coil-side of the first low-coercivity magnet. A second side of the VCM on the opposing side of the coil is similarly configured. The permeance coefficient of such a VCM enables magnetic stability of low-coercivity magnetic materials. Additional high-coercivity permanent magnets may be bonded to the coil-sides of each of the first and second yokes and adjoining the yoke-sides of each of the low-coercivity permanent magnets, if the relative thicknesses of the magnet materials so dictate by design.

Abstract: Data cartridge magazines are disclosed herein. The disclosed data cartridge magazines comprise: a frame; a plurality of slots defined by the frame; and a plurality of locking elements. Each slot is configured to accept a data cartridge, and each locking element corresponds to one of the plurality of slots. Each locking element is operative in a locked and unlocked configuration. Each locking element is further configured to cooperate with the data cartridge when the data cartridge is inserted into the corresponding slot and the corresponding locking element is in the locked configuration. The locking element prevents removal of the data cartridge in the locked configuration and the locking element allows removal of the data cartridge in the unlocked configuration.

Abstract: A clamp member is a disk-shaped member configured to fix a recording disk to a rotating part of a spindle motor. The clamp member includes a clamp lower surface, a plurality of first through holes, and a plurality of second through holes. The clamp lower surface is provided in an outer edge region of the clamp member, contacts an upper surface of the recording disk, and applies a downward force to the upper surface. The first through holes are provided at a first interval in the circumferential direction in a first region at an inner side in the radial direction from the outer edge region, and fastening members to be fastened to the rotating part are inserted into the first through holes. The second through holes are provided at a second interval in the circumferential direction in a second region at the inner side in the radial direction from the first region, and the fastening members are inserted into the second through holes.

Abstract: According to one embodiment, a magnetic sensor includes first to fourth shields, a first magnetic layer, first and second conductive layers, and first and second intermediate layer. The first magnetic layer is between the third shield and the fourth shield. The first magnetic layer includes a first face and a second face. The first face is between the first shield and the second face. The first conductive layer is provided between the third shield and the first magnetic layer. The second conductive layer is provided between the first magnetic layer and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer. The first intermediate layer includes a first intermediate layer face facing the first face. An area of the first intermediate layer face is smaller than an area of the first face.

Abstract: A two-dimensional magnetic recording (TDMR) read head includes a lower reader and an upper reader. Each of the lower reader and the upper reader may have a dual free layer (DFL) magnetic tunnel junction structure having first and second free layers located between lower and upper shields. A synthetic antiferromagnetic (SAF) structure is located on a side of each magnetic tunnel junction. A sidewall insulating layer is located between the lower soft bias layer of the SAF structure and the first free layer. The sidewall insulating layer can have a reduced height such that an upper soft bias layer of the SAF structure is in direct contact with a sidewall of the second free layer, or the upper portion of the sidewall insulating layer located between the upper soft bias layer of the SAF structure and the sidewall of the second free layer has a reduced thickness.

Abstract: According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a flexure, a piezoelectric element, a first bonding material, a second bonding material, and a protrusion. The flexure includes a first outer surface, a first pad, and a second pad. The first pad and the second pad are on the first outer surface. The piezoelectric element includes a second outer surface, a first electrode, and a second outer surface. The first electrode and the second electrode are on the second outer surface. The first bonding material, which is conductive, bonds the first pad and the first electrode. The second bonding material, which is conductive, bonds the second pad and the second electrode. The protrusion is provided on the flexure, is located at least partially between the first bonding material and the second bonding material, and protrudes from the first outer surface.

Abstract: A magnetic tape cartridge includes a magnetic tape, and a storage medium in which information on the magnetic tape is stored. The magnetic tape has a recording surface. Data is recorded in the recording surface by a magnetic head in a state in which the magnetic tape is made to travel. The magnetic head is disposed at an inclined posture with respect to a width direction of the magnetic tape along the recording surface. Angle adjustment information obtained before the data is recorded in the recording surface is stored in the storage medium. The angle adjustment information is information for adjusting an angle at which the magnetic head is inclined with respect to the width direction along the recording surface.

Abstract: A tone arm for a record player is provided. The tone arm comprises an anterior arm section adapted for mounting a pickup cartridge thereto, an posterior arm section adapted for mounting to the record player, and a mounting component comprising a plurality of discrete contact surfaces that adapted for abutting one of i) anterior arm section and ii) the posterior arm section, and preferably discrete contact surfaces for each of the anterior arm section and the posterior arm section. Whereby, the mounting component is adapted to secure the anterior arm section and the posterior arm section to each other. Therefore, through the present document is described the mounting component, the tone arm, and a method of making the latter with the mounting component.

Abstract: A multi-actuator hard disk drive includes a lower actuator with a corresponding voice coil motor assembly (VCMA), a coaxial upper actuator with a corresponding VCMA, and a central support plate positioned between the upper and lower VCMAs and to which the upper VCMA is fastened. Use of a central support plate enables some control over the direct and coupled plant transfer functions, while effectively providing a base support structure for the upper VCMA and enabling use of conventionally-sized fasteners.

Abstract: A baseplate for a disk drive suspension is provided. The baseplate includes a receiving space at a distal end configured to mate with a spring of a load beam. The receiving space partially extends a length of the baseplate. The baseplate also includes a swage hub at a proximal end and an indented surface surrounding the swage hub. The proximal end is opposite the distal end. The indented surface is at least partially defined by a baseplate support section.

Abstract: A method for increasing readout speed of information encoded on magnetic storage media uses contactless circularly polarized X-rays, allowing real-time, high-fidelity readout. Magnetic information is encoded by magnetization value and direction stored on magnetic tapes or disk drives. The method includes providing first c+ and second c? circularly polarized X-ray beams, orienting the first and second X-ray beams towards the magnetic tape, simultaneously reading out the first and second X-ray beams after passage through the same region of the magnetic tape while advancing the magnetic tape, and determining magnetic information by the difference between two readout signals from the first and second x-ray beams based on X-ray magnetic circular dichroism. Based on beam splitting, real-time readout of the magnetic signal stored on the magnetic tape is achievable by intensity signal evaluation for the first and second X-ray beams.

Abstract: A multi-disk pack hard disk drive includes first and second spindle motor assemblies mounted one over the other on a base post. Each motor assembly may include a compact axial flux motor. The motor wiring for each may be routed within a structural cutout feature of the base post to an electrical connector at the base. A compact threaded disk clamp and motor hub interface may be implemented to further reduce the vertical height of the multi-disk pack assembly.

Abstract: According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a flexure, a piezoelectric element, a first bonding material, a second bonding material, and a protrusion. The flexure includes a first outer surface, a first pad, and a second pad. The first pad and the second pad are on the first outer surface. The piezoelectric element includes a second outer surface, a first electrode, and a second outer surface. The first electrode and the second electrode are on the second outer surface. The first bonding material, which is conductive, bonds the first pad and the first electrode. The second bonding material, which is conductive, bonds the second pad and the second electrode. The protrusion is provided on the flexure, is located at least partially between the first bonding material and the second bonding material, and protrudes from the first outer surface.

Abstract: The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head. The magnetic recording head comprises a main pole, a shield, and a spintronic device disposed between the main pole and the shield. The spintronic device comprises a field generation layer (FGL) spaced a distance of about 2 nm to about 3 nm from the main pole, a first spacer layer disposed on the FGL, a spin torque layer (STL) disposed on the first spacer layer, a second spacer layer disposed on the STL, and a negative polarization layer (NPL) disposed between the second spacer layer and the shield. The spintronic device has a length of about 17 nm to about 21. During operation, the STL has a magnetization precession of about 16 degrees to about 170 degrees, and the FGL has a magnetization precession of about 60 degrees to about 70 degrees.

Abstract: A magnetic tunneling junction (MTJ) structure is described. The MJT structure includes a stress modulating layer on a first electrode layer, where a material of the stress modulating layer is different from a material of the first electrode layer. The MJT structure further includes a MTJ material stack on the stress modulating layer. And the MJT structure further includes a second electrode layer on the MTJ material stack. The stress modulating layer reduces crystal growth defects and interfacial defects during annealing and improve the interface lattice epitaxy. This will improve device performance.

Abstract: A disk device according to one embodiment includes a magnetic disk, a magnetic head, and a flexible printed circuit board. The flexible printed circuit board is electrically connected to the magnetic head. The flexible printed circuit board includes a first layer, a second layer having conductive property, and a third layer having insulation property. The first layer includes a first surface having insulation property. The second layer overlays the first surface, and includes a first conductor and a second conductor spaced from the first conductor. The third layer covers at least a part of the first surface and at least a part of the second layer. The flexible printed circuit board is provided with a first hole that is located between the first conductor and the second conductor with spacing from the second layer and penetrates the third layer.

Abstract: An electronic device including a housing having an interior gas space, at least one electronic component positioned within the housing, an environmental control module positioned within the housing, wherein the environmental control module contains a sorbent, and a relative humidity sensor in communication with the interior gas space, wherein the interior gas space is maintainable at a relative humidity of 0% as measured by the relative humidity sensor. The interior gas space may include between about 97% and about 99.9% helium expressed as a molar fraction and at least a portion of the remainder as molecular oxygen. The sorbent can include at least one of a type A zeolite, a type X zeolite, or a type Y zeolite.