According to one embodiment, a disk device includes a disk-shaped recording medium, a head which processes data on the recording medium, and a housing accommodating the recording medium and the head. The housing includes a base with a side wall, and a cover having a welded portion welded to the side wall by laser welding. The welded portion includes a first welded portion welded to a first region of the side wall and having weld beads with a first shape, and a second welded portion welded to a second region of the side wall and having welded beads with a second shape different from the first shape.

According to one embodiment, a disk device includes a housing including a sidewall, a magnetic disk, a wireless communication device including a first communication antenna, and a first insulating member. The sidewall includes a first through portion. The first insulating member closes the first through portion. The first communication antenna is located in the first through portion, is disposed spaced from the housing, and wirelessly communicates with an outside of the housing.

A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, the lighter-than-air gas concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.

A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, helium concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.

According to one embodiment, a disk device includes a housing including a sidewall, a magnetic disk, a wireless communication device including a first communication antenna, and a first insulating member. The sidewall includes a first through portion. The first insulating member closes the first through portion. The first communication antenna is located in the first through portion, is disposed spaced from the housing, and wirelessly communicates with an outside of the housing.

According to one embodiment, a disk device includes a disk-shaped recording medium, a base accommodating the recording medium, the base including a bottom wall, a sidewall on a peripheral portion of the bottom wall, and a rib on a part of an upper surface of the sidewall, a first cover on a part of the upper surface of the sidewall, and a second cover on a first surface of the rib and above the first cover. The rib includes a first region with a first width, a second region with a second width less than the first width, and the first surface with a fixed width around an entire circumference of the rib. The first region and the second region are located corresponding to a side portion of the recording medium.

A disk device includes a housing having a sidewall, the side wall having a first through-hole; a magnetic disk rotatably disposed in the housing and surrounded by the sidewall in a radial direction; a flexible printed circuit electrically connected to the magnetic disk; an insulator closing the first through-hole; a wireless communication device having a first communication antenna inside the housing; and a control board electrically connected to the flexible printed circuit. The control board is supplied with power from outside of the housing via a first connector, and is configured to receive a write command or a read command via the first communication antenna.

A base member serves as a part of a housing of a hard disk drive device. The base member includes a base body being a cast product, a first machined surface obtained by machining a portion formed with a convex portion of the base body, and a coating film covering a surface of the base body. The base body includes a coated surface obtained by covering the first machined surface with the coating film, and a second machined portion obtained by machining a part of the base body other than the first machined surface.

According to one embodiment, a disk device includes a recording medium, a base accommodating the recording medium, the base including a bottom wall, a sidewall on a peripheral portion of the bottom wall, and a rib on a part of an upper surface of the sidewall, a first cover on a part of the upper surface of the sidewall, and a second cover on the rib and above the first cover. The rib includes a first region with a first chamfered surface with a first chamfered width and a second region with a second chamfered surface with a second chamfered width which is less than the first chamfered width. The first region and the second region are located corresponding to a side portion of the recording medium.

A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, helium concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.