According to one embodiment, a disk device includes rotatable magnetic disks, a first actuator assembly rotatably supported on a pivot through a first bearing unit, a second actuator assembly rotatably supported on the pivot through a second bearing unit and provided side by side with the first actuator assembly in an axial direction of the pivot, and a filter unit provided between the magnetic disks and the first and second actuator assemblies. The filter unit includes a holder including a shielding portion facing a boundary portion between the first actuator assembly and the second actuator assembly and a ventilation opening provided at a position spaced apart from the boundary portion in the axial direction, and a filter held by the holder and facing the ventilation opening.

An adsorbent breather assembly for filtering contaminants such as particulars and vapor phase contaminants, e.g. volatile organic compounds, for use with electronic devices can include a blocking region adjacent to the adsorbent filter layer to improve filtering performance.

A base unit includes a support to support a motor, a bottom plate, and a wall. The bottom plate extends radially outward from the support. The wall extends upward from an outer periphery of the bottom plate, and includes a rectangular opening in planar view. Surfaces of the bottom plate and the wall include a cover surface covered with an electrodeposition coating film and an exposed surface in which a material of the base unit is exposed from the electrodeposition coating film. At least an upper end surface of the wall and a partial region of an inside wall surface of the wall continuous with the upper end surface are each the exposed surface.

A hard disk drive includes an enclosure housing a first set of magnetic recording media coupled to a first spindle motor, a second set of magnetic recording media coupled to a second spindle motor, and a third set of magnetic recording media coupled to a third spindle motor. The first set of magnetic recording media at least partially overlaps with the second set of magnetic recording media and the third set of magnetic recording media.

A card reader is provided which is capable of detecting a skimming magnetic head attached to a front side of a card insertion member formed with a card insertion port and a skimming magnetic head attached to an inclined face of the card insertion port with a simple structure. The card reader includes a card insertion member 8 formed with a card insertion port 3 and a light emitting element 9 and a light receiving element for detecting that a foreign matter has been attached to the card insertion member 8. A lower face of the card insertion port 3 is formed to be an inclined face 3a which is inclined toward a lower side as going to the front side.

A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.

An approach to a head gimbal assembly (HAG), such as for a hard disk drive, includes a load beam formed with a deck portion and side rail portions extending from each lateral edge of the deck portion, where each side rail portion includes a crash stop structure extending away from and in the thickness direction of the side rail portion. In a configuration in which the side rails extend at an obtuse angle, z-shaped and reverse z-shaped crash stop structures, opposing angled c-shaped notch structures pairs, or opposing half dome shaped dimple pairs, on back-to-back load beams of a heat-assisted magnetic recording (HAMR) head gimbal assembly can elicit mechanical contact between the crash stops in the event of an operational shock event, thereby avoiding mechanical contact between HAMR chip-on-submount assembly (CoSA) laser modules.

According to one embodiment, an electronic device includes a casing, a flexible wiring member, and a first electrical component, for example. The casing is provided with an opening. The flexible wiring member includes an insulating film, a lead mounted on the insulating film, and a connection terminal, and extends through the opening. The sealant is filled in the opening. The first electrical component is encapsulated by the casing and electrically connected to a second electrical component outside the casing through the flexible wiring member.

According to one embodiment, a disk device includes a housing including a base including a sidewall, and a first cover on a surface of the sidewall, and a discoidal recording medium in the housing. The first cover includes a first surface, a second surface on an opposite side to the first surface, and a side portion. The second surface includes a packing on a peripheral portion thereof. The side portion includes a burr on the second surface side and the packing is aligned to the burr.

According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.