Abstract: Certain exemplary aspects of the present disclosure are directed towards dual cavity apparatus and related methods involving hermetically sealing the cavities by evacuating and atmosphere therein, filling the cavity with a gas, and sealing the gas in the cavities. This evacuation and fill approach is carried out through openings that provide access to the cavities. During evacuation of at least one of the cavities through one of the openings, one or more spacers prevent the cavity from collapsing in response to the vacuum force.

Abstract: Certain exemplary aspects of the present disclosure are directed towards a manufacturing apparatus including a first chamber having a first cavity, and a first actuator. The first actuator aligns the opening of the first chamber to an opening in a second chamber having a second cavity, sealing the first cavity to the second cavity. The manufacturing apparatus further includes gas flow componentry that in conjunction with the first actuator and first chamber evacuate the second cavity by drawing a vacuum in the first cavity. After the second cavity is evacuated, the gas flow componentry fills the second cavity filled with a gas by introducing the gas to the first cavity. A second actuator seals the gas in the second cavity by applying a seal that covers the opening in the second chamber while the first and second cavity remains sealed to one another via the first actuator.

Abstract: Certain exemplary aspects of the present disclosure are directed towards a disc drive apparatus. A base deck and a cover are joined to one another by a friction-stir weld along a lip of the cover that extends along a periphery of the cover and over a surface of the base deck. The base deck and cover enclose a cavity, which is hermetically sealed by the weld.

Abstract: Certain exemplary aspects of the present disclosure are directed towards a manufacturing apparatus including a first chamber having a first cavity, and a first actuator. The first actuator aligns the opening of the first chamber to an opening in a second chamber having a second cavity, sealing the first cavity to the second cavity. The manufacturing apparatus further includes gas flow componentry that in conjunction with the first actuator and first chamber evacuate the second cavity by drawing a vacuum in the first cavity. After the second cavity is evacuated, the gas flow componentry fills the second cavity filled with a gas by introducing the gas to the first cavity. A second actuator seals the gas in the second cavity by applying a seal that covers the opening in the second chamber while the first and second cavity remains sealed to one another via the first actuator.

Abstract: Certain exemplary aspects of the present disclosure are directed towards dual cavity apparatus and related methods involving hermetically sealing the cavities by evacuating and atmosphere therein, filling the cavity with a gas, and sealing the gas in the cavities. This evacuation and fill approach is carried out through openings that provide access to the cavities. During evacuation of at least one of the cavities through one of the openings, one or more spacers prevent the cavity from collapsing in response to the vacuum force.

Abstract: Certain exemplary aspects of the present disclosure are directed towards a disc drive apparatus. A base deck and a cover are joined to one another by a friction-stir weld along a lip of the cover that extends along a periphery of the cover and over a surface of the base deck. The base deck and cover enclose a cavity, which is hermetically sealed by the weld.

Abstract: Certain exemplary aspects of the present disclosure are directed towards an apparatus in which a base deck and a forged base deck cover are coupled to one another, via a weld joint, to provide a hermetically sealed cavity within. The base deck includes an outer region, and the base deck cover includes a lip that interfaces with the outer region of the base deck to provide the weld joint. Similarly, the base deck is formed by an outer region of a base deck bottom portion interfacing with a lip of the shroud to form, via welding, the base deck.

Abstract: Certain exemplary aspects of the present disclosure are directed towards an apparatus in which a base deck and a forged base deck cover are coupled to one another, via a weld joint, to provide a hermetically sealed cavity within. The base deck includes an outer region, and the base deck cover includes a lip that interfaces with the outer region of the base deck to provide the weld joint. Similarly, the base deck is formed by an outer region of a base deck bottom portion interfacing with a lip of the shroud to form, via welding, the base deck.

Abstract: A method for attaching a printed circuit card assembly to an actuator assembly in a disc drive comprises forming one or more pins integrally with the actuator assembly, inserting each pin through a corresponding pin opening in the printed circuit card assembly, and attaching the pins to the printed circuit card assembly. The pins may be attached to the printed circuit card assembly by a soldering process, or alternatively, pressure may be applied to a top surface of the pins to cause them to deform over the printed circuit card assembly, thereby securing the printed circuit card assembly to the actuator assembly. A disc drive in accordance with a preferred embodiment of this invention has an actuator assembly with one or more integral pins and a printed circuit card assembly attached to the integral pins.

Abstract: A disc drive assembly includes a magnetic disc mounted on a hub of a spindle motor. The spindle motor includes a base portion supporting the hub for rotation about a spindle axis. A bottom surface of the base portion extends outside of an internal disc drive environment, and a damper affixed to the bottom surface of the base portion attenuates vibrations within the base portion of the spindle motor. A constrain layer of the damper is secured to the bottom surface of the base portion by an adhesive, and the constrain layer is sufficiently stiff to dampen resonant vibrations such as rocking mode vibrations.

Abstract: An actuator assembly for use in a data storage device is described that has features that reduce off-track writes due to coil popping. The fantail portion of the actuator includes thermal restraint features that engage with the over-mold, and the thermal restraint feature are positioned prevent the over-mold from separating from the actuator as a result of the over-mold and the actuator having different coefficients of thermal expansion. The thermal restraint features reduce the length of effective interface between the actuator and the over-mold acted upon by shear forces due to coefficient of thermal expansion mismatch. In one example, the thermal restraint features are holes that extend through the actuator, to allow the over-mold to flow through the holes and connect on both sides of the fantail during molding, effectively interlocking the fantail portion to the over-mold.

Abstract: A disc drive device includes a base plate having an upper surface, a voice coil motor operably attached to the upper surface of the base plate, and a damper pad positioned on the upper surface of the base plate between the base plate and the voice coil motor such that vibrations occurring in the base plate and/or the voice coil motor are effectively damped. In this manner, vibrationally induced noise in a disc drive servo system and vibrationally induced acoustical emissions from the disc drive device are reduced.

Abstract: A disc drive assembly includes a magnetic disc mounted on a hub of a spindle motor. The spindle motor includes a base portion supporting the hub for rotation about a spindle axis. A bottom surface of the base portion extends outside of an internal disc drive environment, and a damper affixed to the bottom surface of the base portion attenuates vibrations within the base portion of the spindle motor. A constrain layer of the damper is secured to the bottom surface of the base portion by an adhesive, and the constrain layer is sufficiently stiff to dampen resonant vibrations such as rocking mode vibrations.

Abstract: A disc drive device includes a base plate having an upper surface, a voice coil motor operably attached to the upper surface of the base plate, and a damper pad positioned on the upper surface of the base plate between the base plate and the voice coil motor such that vibrations occurring in the base plate and/or the voice coil motor are effectively damped. In this manner, vibrationally induced noise in a disc drive servo system and vibrationally induced acoustical emissions from the disc drive device are reduced.