Abstract: A suspension is configured to support a magnetic head slider having a recording head element for recording data signals to a magnetic recording medium and a microwave generating element that applies a high-frequency magnetic field to the magnetic recording medium when recording is conducted by the recording head element. The suspension includes a flexure that supports the magnetic head slider and a microwave signal transmission line. The microwave signal transmission line is connected to the microwave generating element and configured to transmit microwave signals for generating the high-frequency magnetic field. A portion that supports the microwave signal transmission line of the flexure includes a lamination structure, a ground layer with the thickness of 0.1 ?m or greater and less than 2 ?m and having higher conductivity than that of the flexure main plate, and an insulating layer that supports the microwave signal transmission line.

Abstract: A suspension for a head gimbal assembly includes a flexure having a laminated structure including a substrate layer, an insulating layer formed on the substrate layer, and a conducting layer formed on the insulating layer. And first bonding pads are formed on the conducting layer at a first surface of the flexure, so as to electrically connect with a slider via solder balls, and second bonding pads are formed on the substrate layer at a second surface of the flexure opposite to the first surface, so as to electrically connect with extra components formed at the second surface via solder balls. The suspension can connect slider and other extra components at two opposite surfaces of the flexure with a simplified and compacted structure and a reduced cost.

Abstract: A magnetic disk device including a disk, a spindle motor, a base for supporting the spindle motor and the disk, a slider includes a head element. The device also includes an actuator including arms for supporting the slider and a coil of a voice coil motor for rotating the arms, wherein a first natural bending frequency of the coil is less than a first natural bending frequency of the arms.

Abstract: A voice-coil motor (VCM) with voice coils configured to reduce vibrations of a head when data is accessed on a disk in a disk drive. The VCM includes at least one VCM magnet and a voice-coil assembly. The voice-coil assembly includes a first voice coil and at least a second voice coil. The first voice coil is disposed in proximity to a magnetic pole of the at least one voice-coil-motor magnet. The second voice coil is disposed in close proximity to the first voice coil such that the first voice coil substantially overlays the second voice coil. The first voice coil and the second voice coil are configured to reduce vibrations of the head when data is accessed on a disk in the disk drive. A rotary actuator including the voice coils and a disk drive including the VCM are also provided.

Abstract: A perpendicular magnetic write head having a laminated trailing return pole structure that reduces magnetic eddy currents in the return pole for improved write head efficiency. The trailing magnetic return pole includes multiple magnetic layers. Each magnetic layer is separated from an adjacent magnetic layer of the return pole by a non-magnetic layer. The non-magnetic layer terminates at a region that is removed from the air bearing surface in order to allow contact between the magnetic layers at the ABS, thereby preventing stray magnetic fields from emitting from the magnetic layers of the write pole.

Abstract: As a measure against vibration caused by disturbance due to mass eccentricity of a disc, a conventional disc device has a means to add an auxiliary mass that passively operates. This method has no way to enhance vibration damping effect other than setting the auxiliary mass to be large, and therefore there is a problem that the device becomes large. An auxiliary mass 300 is actively driven by an auxiliary mass driving portion 360. The driving of the auxiliary mass 300 is performed by amplifying a signal corresponding to a force transmitted from a main frame portion 100 to the auxiliary mass 300. This achieves a vibration damping effect using the small auxiliary mass 300 to the same degree as that where the large auxiliary mass is mounted.

Abstract: A suspension board with circuit includes a metal supporting board, an insulating layer formed on the metal supporting board, and a conductive layer formed on the insulating layer. The insulating layer includes a first insulating layer and a second insulating layer. The conductive layer includes a first conductive pattern and a second conductive pattern. The first conductive pattern includes a first connecting portion formed on the first insulating layer and under the second insulating layer and a first terminal. The second conductive pattern includes a second connecting portion formed on the second insulating layer and a second terminal. The suspension board with circuit is formed with an opening, and a slider is provided such that an electronic element is inserted in the opening to be electrically connected to the first terminal and a magnetic head on the slider is electrically connected to the second terminal.

Abstract: An apparatus for vibration reduction in a hard disk drive, the hard disk drive comprising at least one hard disk and at least one actuator arm. The apparatus comprises a flow mitigating device disposed on the at least one actuator arm, the flow mitigating device comprising at least one surface being inclined with respect to a reference plane of the actuator arm to generate streamwise vortices for interacting with and weakening vortex structures generated at a trailing edge of the actuator arm during spinning of the hard disk.

Abstract: A thin film magnetic head has a plurality of electrode terminals formed on substantially the same surface as the head formation surface on which magnetic head element is laminated. The plurality of electrode terminals is arranged in an array near and along the second side of the head formation surface that is opposite the first side on the ABS side, from which the functional end of the magnetic head is exposed. The plurality of electrode terminals is formed to include a pad and a protrusion formed along a part of the periphery of the pad.

Abstract: Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.

Abstract: A row bar having a plurality of slider forming areas collocated and slider cutting areas formed between two adjacent slider forming areas respectively, the slider forming areas are eventually cut into individual sliders along the slider cutting areas respectively, each slider having a pole tip embedded therein and an air bearing surface pattern on an air bearing surface facing to a disk, and at least a regular measuring pattern with straight line is formed on one of the slider cutting areas, to serve as a frame of reference for measuring the position of the pole tip and the air bearing surface pattern. The present invention can improve the measuring accuracy, decrease the measuring error and, in turn, improve the performance of the slider.

Abstract: In one embodiment a transducer head assembly is disclosed having a head module. The head module comprises at least one media bearer element providing a media bearer surface, and a head element block having an array of head elements. The assembly further comprises a carrier structure to carry the head module, and an actuator to move the head element block relative to the at least one media bearer element. Tape drive apparatus having actuator apparatus to cause relative displacement between head element blocks is also disclosed. A transducer head module and a method of making a transducer head assembly are also disclosed.

Abstract: A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.

Abstract: A perpendicular magnetic recording write head has an improved antiferromagnetically-coupled laminated main pole (MP) formed on a substrate. The MP has two ferromagnetic multilayers, each comprising at least one FeCo/NiFe/FeCo ferromagnetic trilayer, antiferromagnetically coupled across an antiferromagnetically coupling (AFC) film consisting essentially of ruthenium (Ru). The MP has a NiFe layer directly above the AFC film, on the side of the AFC film opposite the side facing the substrate, and in contact with the Ru AFC film and the lower FeCo layer of the upper multilayer. There is no NiFe layer directly below the Ru AFC film so the side of the AFC film facing the substrate is in direct contact with the upper FeCo layer of the lower multilayer.

Abstract: A thermally assisted magnetic head is formed by performing a head forming process, a mounting part forming process and a light source mounting process in that order. In the head forming process, a planned area is secured on a light source placing surface of a slider substrate, then a magnetic head part is formed on a head area other than the planned area and a spacer for securing a mounting space for the laser diode is formed on the planned area. In the mounting part forming process, a light source mounting part is formed by removing the spacer. In the light source mounting process, a laser diode is mounted on the light source mounting part formed by the mounting part forming step.

Abstract: A reading element of a magnetic head has a first magnetoresistive effect part (first MR part) and a second magnetoresistive effect part (second MR part), an electrical resistance of the first MR part changing according to an external magnetic field applied to a first magnetic field sense area, an electrical resistance of the second MR part changing according to an external magnetic field applied to a second magnetic field sense area. A width of the second magnetic field sense area in a track width direction of the recording medium is larger than a width of the first magnetic field sense area in the track width direction, and a phase of change in the electrical resistance of the second MR part with respect to the external magnetic field substantially reverses to or substantially the same as a phase in the electrical resistance of the first MR part.

Abstract: An integrated conductor/suspension structure for supporting and electrically connecting a write/read head in a hard disk drive and methods of making the conductor/suspension structure are provided. The integrated conductor/suspension structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The suspension structure includes apertures formed therein that result in a reduction in the lossy material and its effect on the electrical signals. In addition, the conductor/suspension structure of the present invention provides shielding to reduce the interference from external electric fields.

Abstract: An interconnect between the write driver and the write head in a magnetic recording disk drive enables an inherent write current overshoot. The interconnect includes an integrated lead suspension (ILS) and a short flex cable that connects the write driver circuitry to the ILS. The interconnect is a two-segment transmission line, with the first segment connected to the write driver having multiple sub-segments or sections with non-uniform impedance levels. The section of the first segment that connects to the write driver is the short flex cable and has an impedance substantially higher than the source impedance ZWD of the write driver. The multiple sections of the first segment have non-uniform impedance values that have an effective impedance Z01-eff that substantially matches ZWD. The second segment of the transmission line has an effective impedance Z02-eff that is substantially less than Z01-eff. The write lines for the +W and ?W signals are preferably interleaved on the transmission line sections.

Abstract: An integrated lead suspension (ILS) in a magnetic recording disk drive has the transmission line portion of the ILS between the flex cable and the gimbal formed of multiple interconnected segments, each with its own characteristic impedance. At the interface between any two segments there is a change in the widths of the electrically conductive traces of the transmission line. The change in impedance of a fixed-length segment is a function of the change in its trace width. The number of segments and their characteristic impedance values are selected to produce the largest frequency bandwidth with a substantially flat group delay from the write driver to the write head.

Abstract: A hard disk drive including a base plate and a drive cover. The hard disk drive also includes a capacitive coupling feature disposed between the base plate and the drive cover. The capacitive coupling feature is configured to provide grounding between the base plate and the drive cover.

Abstract: A thin film magnetic head includes a medium projection detection mechanism that detects a projection on the surface of a recording medium. The medium projection detection mechanism has a discharging electrode, a capacitor, and an input line and an output line that are connected to the discharging electrode. The discharging electrode is configured to receive a voltage applied through the input line, and the capacitor is configured to store electric charge by the applied voltage. The output line is connected to a projection detection processing system and is connected to the charging electrode and the projection detection processing system to detect the location of the projection that is a detection target by detecting voltage change that is caused by discharging between the discharging electrode and the projection when the projection is detected.

Abstract: A hard disk drive frame is provided. The distances from its hard disk drive fixing parts to the substrate center are not the same. During the process of vibrational energy transfer, three-dimensional reactions are induced correspondingly to cancel the kinetic energy transfer. The reactions generated at the static balance point in the three dimensions interfere one another to destroy vibrational frequencies in specific directions. Therefore, the disclosed hard disk drive is resistant to vibrations and suffers less from the resonance effect.

Abstract: A disk drive suspension is provided with a load beam and a flexure. A tongue portion is formed on the flexure. The tongue portion comprises a slider mounting surface and a flat portion. A slider is mounted on the slider mounting surface. A dimple is formed on the flat portion. A tip of the dimple projects thicknesswise relative to the tongue portion toward the load beam. A protrusion is formed on a facing surface of the load beam. An end face of the protrusion projects thicknesswise relative to the load beam toward the dimple. As the tip of the dimple contacts the end face of the protrusion, the tongue portion is swingably supported on the protrusion.

Abstract: A suspension for a head gimbal assembly comprises a flexure having a flexure having a tail with a plurality of electrical traces and a plurality of bonding terminals adapted for connecting with a flexible printed circuit formed thereon. Each of the bonding terminals comprises a connecting pad and a hole formed at one end of the connecting pad for electrically and mechanically connecting the connecting pad to the flexible printed circuit by bonding material. And the connecting pad has a bonding portion adjacent to the hole and an exposed portion for testing. The invention also discloses a head gimbal assembly and a disk drive unit with the same.

Abstract: A suspension for a head stack assembly, comprises a flexure with a suspension tongue, a flexure tail and a plurality of conductive traces extending between the suspension tongue and the flexure tail, each of said conductive traces having one end thereof terminated to an electrical pad formed on the suspension tongue for electrical connection to a slider and the other end thereof terminated to a connection pad formed on the flexure tail for both testing and bonding such that the flexure has no additional testing pads. The suspension with a flexure tail able to make the bonding and the dynamic performance testing on the pad area and thus reduce suspension length and increase flexure density for low cost. The invention also discloses a manufacturing method of the suspension and a HSA with such an suspension and a disk drive unit having such an HSA.

Abstract: Approaches for protecting a component when a hard-disk drive (HDD) experiences a mechanical shock. An HDD includes a suspension comprising a load beam, a gimbal, and a flexure tongue. A component, such as a microactuator, is mounted on the suspension. The flexure tongue extends to at least the edge of the microactuator that is furthest from the gimbal. The flexure tongue prevents the microactuator from contacting the load beam when the HDD receives a mechanical shock. Alternately, the flexure tongue may comprise a tip portion that extends beyond the edge of the microactuator that is furthest from the gimbal, and the tip portion of the flexure tongue may deform to act as shock absorber when the HDD receives a mechanical shock. Alternately or additionally, a padding material may be used to prevent the microactuator or the flexure tongue from contacting the load beam when the HDD receives a mechanical shock.

Abstract: Approaches for reducing vibrations, such as resonance vibrations, that are propagated to a hard-disk drive (HDD) head are disclosed. A hard-disk drive may compromise a lead suspension that includes a magnetic read/write head. The magnetic read/write head may be connected to the lead suspension by a plurality of leads. A portion of each of the plurality of leads, such as the solder ball joints, may be covered by a dampening material that is designed to absorb vibrations occurring in the lead suspension to prevent transmission of the vibrations to the magnetic read/write head. Alternately, the dampening material may be applied to other locations, such as the limiter engagements, which can transmit vibrations to the magnetic read/write head.

Abstract: There is provided a motor. The motor includes a shaft rotatably installed and supported by a sleeve, a rotor case coupled with the shaft and on which a disk is mounted, and a pressure difference generation portion disposed in a space between the disk and the rotor case and generating a pressure difference using airflow in the space.

Abstract: A heat-assisted magnetic recording head includes a slider, an edge-emitting laser diode fixed to the slider, and an external mirror provided outside the slider. The slider includes a magnetic pole, a waveguide, and a near-field light generating element. The laser diode includes: an emitting end face that lies at an end in a direction parallel to the plane of an active layer and includes a laser-light emission part; and a mounting surface that lies at an end in a direction perpendicular to the plane of the active layer and faces the slider. The external mirror includes: a first reference surface that is parallel to the emitting end face and faces the emitting end face; a second reference surface that is parallel to the mounting surface and faces toward the same direction as the mounting surface does; and a reflecting surface that connects the first and second reference surfaces to each other and reflects the laser light emitted from the emission part toward the waveguide.

Abstract: A power supply structure for a piezoelectric actuator is provided. The piezoelectric actuator has a base member, a movable member, and a piezoelectric element arranged between the base member and the movable member. When receiving electric power, the piezoelectric element causes a shear deformation to minutely move the movable member relative to the base member. The power supply structure includes a wiring member, a wiring connector, a through hole, and a contact. The wiring member has a conductive base layer, an insulating layer, and a conductor layer, the conductive base layer having an insular part and a main part that is electrically isolated from the insular part. The wiring connector has a first face joined with an electrode of the piezoelectric element and a second face joined with the insular part. The through hole is formed through at least the insulating layer of the wiring member.

Abstract: A disk drive comprising a disk, and a head actuated over the disk, the head comprising a read element and a write element. The disk drive further comprises a preamp and an interconnect comprising a first transmission line and a second transmission line coupling the head to the preamp. A compensation network is disclosed operable to compensate for an impedance discontinuity in the first and second transmission lines, the compensation network comprising a first trace and a second trace connected in parallel with the first and second transmission lines, wherein a shape of the first and second traces varies to form at least a first capacitor.

Abstract: A thin film magnetic head includes first and second shield layers that are positioned on both sides of a magnetoresistive (MR) stack with respect to a film surface orthogonal direction; a first exchange-coupling layer that is positioned between the MR stack and the first shield layer and that generates an exchange-coupling between a first magnetoresistive (MR) magnetic layer and a first magnetic control layer of the first shield layer; a second exchange-coupling layer that is positioned between the MR stack and the second shield layer and that generates an exchange-coupling between a second magnetoresistive (MR) magnetic layer and a second magnetic control layer of the second shield layer; a bias magnetic field application layer that is disposed at an opposite surface of the MR stack from an air bearing surface (ABS) and that applies a bias magnetic field to the MR stack in a direction orthogonal to the ABS; and pair of side shield layers that are positioned at both sides of the MR stack with respect to a tra

Abstract: The disk drive device includes a base member, a hub, a bearing unit which is arranged on the base member and which rotatably supports the hub, and a spindle drive unit which drives the hub to rotate. The spindle drive unit includes a stator core having a salient pole, a coil wound around the salient pole and a magnet opposed to the salient pole. The hub formed of magnetic material includes an outer cylinder portion engaged with an inner circumference of a recording disk and an inner cylinder portion to which an outer circumference of the magnet is fixed. The diameter of the inner cylinder portion is larger than the diameter of the outer cylinder portion.

Abstract: A head suspension 11 includes a load beam 17 having a base plate 13, a hinge part 15 resiliently supported by the base plate, and a rigid part 14 joined with the hinge part, a reinforcing plate 25 joined with the rigid part at a portion proximal to the hinge part, and a bend 17c on the load beam formed by bending the load beam toward the reinforcing plate along an edge 25a of the reinforcing plate. Only by accurately joining the reinforcing plate with the load beam in a sway direction (a widthwise direction of the head suspension), the load beam is easily and properly bent without torsion to form the bend 17c along the edge of the reinforcing plate that defines a bending strength boundary.

Abstract: The present invention aims to realize cost reduction and improved durability of a magnetic head slider locking apparatus for detachably mounting a magnetic head slider to a magnetic head suspension. The magnetic head slider locking apparatus includes a fixed portion having a distal-side engage portion with which a distal end of the slider is engaged and being fixed to a flexure part, an endless spring portion surrounding the fixed portion in a plan view, a connection portion connecting the fixed portion to the spring portion, and a proximal-side engage portion provided to the spring portion so as to be engaged with a proximal end of the slider.

Abstract: In a disk drive device, a recording disk is mounted on a rotor. A base has a bearing hole, the center of which is along the rotational axis of the rotor. A bearing unit rotatably supports the rotor with respect to the base, the bearing unit being glued to the bearing hole. A ring-shaped first groove, the center of which is along the rotational axis, is arranged on a side surface of the bearing hole. A ring-shaped second groove, the center of which is along the rotational axis, is arranged on an outer surface of the housing, the outer surface contacting the side surface of the bearing hole. The position of the second groove with respect to its direction along the rotational axis is different from the position of the first groove with respect to its direction along the rotational axis. The base and the bearing unit are electrically connected by a conductive resin applied along an edge portion of the bearing hole, the edge portion being on a lower surface of the base.

Abstract: A tolerance ring has a band (16) with outwardly extending corrugated protrusions forming waves (2) which engage a surface (8) of the bore (4) in a housing (5). At one end of the tolerance ring is an outwardly flared guide surface (15) extending axially from the band (16). The guide surface (15) acts as an enlarged entrance to the band (16) for a shaft (3) to be mounted in the bore (4) by insertion into the tolerance ring. The use of the guide surface (15) assists assembly and reduces or eliminates particle production. It is also possible for the corrugated portions to extend inwardly, for the guide surface to be inwardly flared, and for the tolerance ring to be mounted on the shaft prior to insertion in the bore.

Abstract: According to an embodiment, a head includes a slider and a head portion on the slider. A facing surface of the slider includes a negative-pressure cavity defined by a recess in the facing surface, a leading step portion on an upstream side of the negative-pressure cavity, a pair of side portions extending in a first direction from the leading step portion, a trailing step portion on an outflow side of the negative-pressure cavity, a pair of skirt portions extending in the first direction from the side portions toward the outflow end of the slider, and an enclosure step portion continuously arranged along an outflow end edge and opposite side edges of the facing surface from the trailing step portion to opposite sides of the skirt portions and outsides of the side portions and formed deeper than the skirt portions and shallower than the negative-pressure cavity.

Abstract: According to an embodiment, a magnetic head for perpendicular recording, includes a slider including a facing surface opposed to a recording medium, and a head portion on the slider and configured to perform information processing for the recording medium. The head portion includes a main pole configured to apply a perpendicular recording magnetic field to the recording medium, a recording coil configured to excite the main pole, a write shield pole opposing the main pole across a write gap, side shields arranged individually on opposite sides of the main pole in a track width direction and magnetically isolated from the main pole, and low-flux-density layers formed of a material having a saturation magnetic flux density lower than that of the main pole, located between the main pole and the side shields, and configured to regulate magnetic fluxes flowing from the main pole to the side shields.

Abstract: According to one embodiment, a head gimbal assembly includes: base plate body; flexure; through hole passing through the base plate body; cylindrical base that upstands from the front surface of the base plate body, and has a first inner diameter; a cylindrical flange that continues to the base around the through hole and has a second inner diameter smaller than the first inner diameter; and inner wall surface that is defined by the flange and extends along a cylindrical surface formed by a generating line parallel to a central axis of the through hole. A ratio of a thickness T of the flange defined along a virtual plane orthogonal to the central axis of the through hole to a length L of the inner wall surface defined in a direction parallel to the central axis of the through hole is set to 1.5 or less.

Abstract: A turntable for a storage disk drive apparatus includes a plate member made of a ferromagnetic material and a central resin member arranged at the center of the plate member and provided with an outer peripheral portion positioned above the plate member. The central resin member includes claws extending downwards from the outer peripheral portion and claw position holes overlapping with the claws in the direction parallel to the center axis of the central resin member. The claw position holes include inner surfaces spaced apart from an edge of the plate member. The inner surfaces are defined by the resin. The central resin member includes a resin layer extending in the direction perpendicular to the center axis. The resin layer exists between the portion of the edge of the plate member around the claw position holes and the claw position holes.

Abstract: A magnetic head slider according to the present invention comprises: a slider body including either a write head element or a read head element or both the write head element and the read head element; a seed layer provided on an air bearing surface of the slider body, the seed layer covering either the write head element or the read head element or both the write head element and the read head element, the seed layer having a film thickness that is less than 1 nm; and a protective film formed of diamond-like carbon, the protective film covering the seed layer. The seed layer is mainly formed of silicon and contains a 6A group element in a proportion of 2 atomic fractions or more and 30 atomic fractions or less.

Abstract: A disk drive. The disk drive includes a head for accessing a disk, a suspension for supporting the head, a carriage coupled to the suspension, a pivot-bearing assembly, an adhesive, and an adhesion inhibitor. The pivot-bearing assembly is housed in a hole of the carriage that is configured to rotate in such a way that the carriage is configured to oscillate. The adhesive is disposed between the pivot-bearing assembly and an inner circumferential surface of the hole for bonding the pivot-bearing assembly with the carriage. The adhesion inhibitor is disposed on the same surface as the adhesive for controlling a region of adhesion.

Abstract: A head suspension with a piezoelectric actuator secures basic characteristics such as vibration and impact characteristics without deteriorating a displacement stroke of the piezoelectric actuator. The head suspension has a load beam and a piezoelectric actuator, the piezoelectric actuator supporting a base part of the load beam and configured to displace a front end of the load beam in a sway direction. The piezoelectric actuator has an actuator base and at least a piezoelectric element, the actuator base connected to the base part of the load beam and having at least an opening, the piezoelectric element attached to the opening and deforming in response to a voltage applied thereto to conduct displacement of the front end of the load beam.

Abstract: A first conductor member includes an amplifier-side first conductor, a head-side first conductor, and first and second interleaved conductors. A second conductor member includes an amplifier-side second conductor, a head-side second conductor, and third and fourth interleave conductors. The second interleaved conductor is connected to the amplifier-side first conductor through a first jumper conductor. The fourth interleave conductor is connected to the head-side second conductor through a second jumper conductor. The jumper conductors are formed by partially etching a metal base. The jumper conductors are individually inclined at angles of 45° or less to an axis which extends in a wiring direction of each of the interleaved conductors.

Abstract: This application discloses a Load-UnLoad (LUL) hard disk drive comprising a disk base, a spindle motor mounted on the disk base for rotating at least one disk to create at least one rotating disk surface, and a head stack assembly pivotably coupled to the disk base and configured to engage an actuator latch when the sliders of the head stack assembly are to be parked. The actuator latch includes a latch beam coupled through a latch pivot to the disk base and a boss coupled to the latch beam and configured to limit the stroke of latch motion in the event of a rotary non-operational shock.

Abstract: This application discloses a hard disk drive comprising a arm limiter mounted on a disk base to limit movement of the actuator arms during a non-operational shock event while parked. The arm limiter and disk base are disclosed in various combinations to limit actuator arm movement during non-operational shocks.

Abstract: Provided are an HSA with reduced off-track and an HDD including the HSA. The HSA includes a swing arm rotatably mounted on a base member of an HDD; a connecting plate coupled to a front edge of the swing arm; a suspension coupled to the connecting plate to vibrate finely; a pair of hinges disposed on both sides of a center line of the suspension to connect the connecting plate to the suspension; and a head slider that is a recording or reproducing medium of data mounted on the front edge of the suspension. When a hinge between the pair of hinges, which is closer to a center of the disk of the HDD than the other is, is referred to as a first hinge and the other hinge is referred to as a second hinge, the first hinge has a thickness greater than a thickness of the second hinge.

Abstract: Provided are a head stack assembly (HSA) with reduced off-track, a hard disk drive including the HSA, and a method of reducing the off-track of the hard disk drive. The HSA includes a swing arm rotatably mounted on a base member of a hard disk drive (HDD); a connecting plate coupled to a front edge of the swing arm; a suspension coupled to the connecting plate to vibrate finely; a pair of hinges disposed on both sides of a center line of the suspension to connect the connecting plate to the suspension; a piezoelectric material layer including a piezoelectric material which is disposed on only one hinge of the pair of hinges, wherein the hinge is closer to a center of a disk in the HDD than the other is; and a head slider that is a recording or reproducing medium of data mounted on the front edge of the suspension.

Abstract: In a disk drive suspension including a baseplate and a load beam, a boss portion and protrusions are formed on the baseplate. The protrusions are formed in positions on a first surface of the baseplate off a reference mounting surface in contact with a suspension bearing surface of an actuator arm. Further, the protrusions are formed on a second surface located opposite from the first surface and project relative to the thickness of the baseplate. These protrusions serve to prevent a plurality of baseplates from closely contacting one another during their manufacture.