124results about "Support for heads" patented technology

The disclosure relates to a voice coil motor (VCM) in a hard disk drive during a retract phase, wherein read-and-write heads of the hard disk drive are retracted by the VCM from a disk surface towards an end-of-travel parking condition with the heads climbing over a ramp starting from a ramp edge adjacent the disk surface. During the retract phase, the VCM is operated in a discontinuous mode comprising an alternation of on-times of duration TON and off-times of duration TOFF wherein supply of a drive current to the VCM is facilitated and countered, respectively. The duration TOFF of the off-times is varied to have a lower bound value at the ramp edge and to increase towards an upper bound value as the heads climb over the ramp towards the end-of-travel parking condition.

An apparatus for a spring actuator positioned in a folded spring actuator assembly includes a top section, a middle section, and a bottom section of the spring actuator that form a C-shape for the spring actuator. The middle section includes two parallelized spring legs, where a cable head module is slidable into a gap formed by the top section and two parallelized spring legs of the middle section of the spring actuator.

A wiring circuit board includes a metal supporting substrate, an insulating layer, and a conductive layer in this order in a thickness direction. The conductive layer includes at least one terminal portion and a wiring portion extending from the terminal portion. The metal supporting substrate has an opening portion. The opening portion penetrates the metal supporting substrate in the thickness direction and faces the terminal portion through the insulating layer. The opening portion has a first opening peripheral edge on one side in the thickness direction and a second opening peripheral edge on the other side in the thickness direction. In a projected view in the thickness direction, the second opening peripheral edge is disposed outside the first opening peripheral edge and extends along the first opening peripheral edge.

To provide a suspension capable of suppressing interference between a disk and a slider.SOLUTION: The suspension 10 is provided with a load beam 20 having a dimple part 50 and a flexure 21 having a slider mounting part 30. The convex surface 51 of the dimple portion 50 contacts the slider mounting portion 30. The curvature radius R of the convex surface 51 is less than 0. 10mm, and the gain defined by the following equation is 0.9 or more. Where a is the input amplitude, A is the amplitude, R is the radius of curvature of the convex surface 51, and Fpr is the flexure pitching resistance. k1 is the pitching rigidity of the air bearing, and k2 is the pitching rigidity of the slider mounting portion 30.SELECTED DRAWING: Figure 9

To provide a suspension for a disk device capable of optimizing a profile of an outrigger part.SOLUTION: A sag bent part 55 bent in a thickness direction of a load beam 12 is formed in a part in a length direction of the load beam 12. The load beam 12 includes a first part 12A and a second part 12B with the sag bent part 55 as a boundary. The load beam 12 and a flexure 13 are fixed to each other by a welding part 41 as a fixing part. A slit part 60 is formed around the fixing part. An outrigger supporting part 70 for supporting outrigger parts 33 and 34 is formed inside the slit part 60.SELECTED DRAWING: Figure 1

According to one embodiment, a head gimbal assembly (HGA) of a disk device includes a load beam. The load beam includes two side rails, a plate between the two side rails, a first plane of the plate, a lift tab protruding from an end of the plate, and a protrusion protruding from the first plane and supporting a slider. An edge of each of the two side rails has a first edge, a second edge extending from the first edge toward the lift tab, and a third edge extending from the second edge to the lift tab while being inclined with respect to the first plane so as to approach the first plane. An end of the slider is at the same position as an end of the third edge or is farther from the lift tab than the end of the third edge.

The present invention provides a head gimbal assembly that reduces contact between the flexure and the actuator, a method for manufacturing the same, and a magnetic storage system. [Solution] In a magnetic storage device, the head gimbal assembly 109 includes a load beam 196, a read / write head 134, and an actuator 120 configured to move the read / write head. The head gimbal assembly includes a flexure 140 attached to the actuator. The flexure includes an actuator side 123 facing the actuator and a recess 111 formed on the actuator side that at least partially overlaps the actuator along a virtual plane substantially perpendicular to the length of the load beam.

The present invention provides a wiring circuit board that allows for simple and reliable electrical connection between elements and multiple terminals. [Solution] The wiring circuit board 1 comprises a base insulating layer 2, a plurality of wires 31 of different thicknesses, and a cover insulating layer 4, arranged in order from top to bottom. The plurality of wires 31 include the thickest first wire 311. The wiring circuit board 1 includes a plurality of terminals 32 located on the upper surface of the base insulating layer 2. The plurality of terminals 32 are electrically connected to the plurality of wires 31, respectively. The upper surfaces 321A, 322A of each of the plurality of terminals 32 are located above the upper surface 41A of the cover insulating layer 4 (wiring covering cover portion 41) that covers the first wire 311.

To provide a wiring circuit board containing a copper alloy that combines excellent mechanical strength and excellent conductivity, and a method for manufacturing the same. [Solution] The device comprises a metal support substrate 2, a base insulating layer 3 disposed on one side of the metal support substrate 2 in the thickness direction, and a conductor layer 4 disposed on one side of the base insulating layer 3 in the thickness direction, wherein the metal support substrate 2 and / or the conductor layer 4 contain a copper alloy, the copper alloy contains a first metal made of copper and a second metal that can be alloyed with copper, and the copper alloy in the metal support substrate 2 and / or the conductor layer 4 has a sea-island structure comprising a continuous sea portion and a discontinuous island portion, and also has a lamellar structure.

To provide a magnetic disk device which is improved in reliability by preventing a magnetic head from being damaged due to a defect on a recording medium.SOLUTION: According to an embodiment, a magnetic disk device includes: a rotatable disk-shaped recording medium having a plurality of concentric recording tracks; a magnetic head including a recording element having a first width, a reproducing element having a second width, and a thermal resistance sensor having a third width wider than the first width and the second width; a head actuator that positions the magnetic head on an arbitrary recording track of the recording medium; a detection circuit configured to detect a defect on a surface of the recording medium based on a sensor output of the thermal resistance sensor; and a controller configured to set a feed pitch of the magnetic head in a width direction of the recording tracks to be within one-half of the third width and equal to or more than three recording tracks when a surface state of the recording medium is inspected by the thermal resistance sensor.SELECTED DRAWING: Figure 1

To provide a method for manufacturing a wiring circuit board that allows for relatively good alignment accuracy. [Solution] In the manufacturing of the wiring circuit board 1, first, a metal support substrate 2 is prepared. Next, a base insulating layer 3 is formed on one side in the thickness direction of the metal support substrate 2. Then, a conductor layer 4 is formed on one side in the thickness direction of the base insulating layer 3. In the process of preparing the metal support substrate 2, the metal support substrate 2 is preheated.

A die set to bend a work including a pair of flange bending parts. The die set includes: a die supporting a first part of the work in a length direction; a pad including a pressure surface which holds the work with the die; and a punch which presses a second part of the work in the length direction in a thickness direction of the work while the first part of the work is held between the die and the pad. The die includes: a flat supporting surface supporting the work; a first relief part including a first inclined surface; and a second relief part including a second inclined surface.

To provide a suspension for disk device capable of achieving excellent flexure rigidity while suppressing vibration of a flexure effectively.SOLUTION: A suspension 10 for a disk device includes a load beam 21, a flexure 22 that is superimposed on the load beam and has a tongue 45 on which a slider 11 is mounted and an outrigger 51 connected to the tongue 45, and a first damper material 80 pasted on the load beam 21 and the outrigger 51. The first damper material 80 has a single layer of viscoelastic body.SELECTED DRAWING: Figure 4

To provide a suspension capable of arranging a slider on a slider arrangement portion in a stable posture.SOLUTION: A flexure 22 of a suspension 1 includes a metal base 40, a circuit portion 41, and a slider arrangement portion 50. The slider arrangement portion 50 has an aperture portion 70 formed in the metal base 40 and a slider support portion 90 provided on the metal base 40. The aperture portion 70 is formed at a position where the slider 51 is arranged. An embedding circuit portion 41a is arranged inside the aperture portion 70. The embedding circuit portion 41a is a part of a length direction of the circuit portion 41. The slider support portion 90 supports the slider 51 in a state where the embedding circuit portion 41a is arranged in the aperture portion 70. The embedding circuit portion 41a has an abutting portion 91 contacting a protrusion portion 30a of a load beam 21.SELECTED DRAWING: Figure 4

Maintains good write characteristics in a heat-assisted magnetic recording and playback device. [Solution] According to the embodiment, the adjustment method for a heat-assisted magnetic recording and playback device is an adjustment method for a heat-assisted magnetic recording and playback device equipped with a heat-assisted magnetic recording head and a heat-assisted magnetic recording medium, wherein the bit density in the starting area of ​​the recording band and in each area storing information other than user data is changed to be lower than the bit density of the areas other than the starting area in order to improve the write characteristics.

To provide a magnetic recording head, a design method thereof, and a magnetic recording device that provide thermally activated protection against media damage during dynamic events such as operational shocks, load / unload processes, and emergency power-off.SOLUTION: A perpendicular magnetic recording (PMR) read / write transducer head for heat-assisted magnetic recording (HAMR) includes active nano bumper pads formed from thermally activated dynamic flying height (DFH) bulges that protrude closely on either side of the read / write element, and these bumper pads, which can be multiple, are arranged around the perimeter of he transducer head to absorb the heat generated by active heating element, including the write current. When this energy is absorbed, the bulges expand and change shape, protruding closely outward from the slider air bearing surface (ABS), protecting the read / write head from intentional and unintentional touchdowns.SELECTED DRAWING: None

According to one embodiment, a magnetic disk device includes an actuator which holds a magnetic head to move in a radial direction of a magnetic disk with voice coil motor drive, and a controller. The controller moves a magnetic head from a current position to a target position by controlling the voice coil motor drive. The controller calculates an acceleration of the magnetic head, based on a position history of the magnetic head, and calculates an acceleration of the magnetic head, based on a value of a drive current of the voice coil motor. The controller detects vibration occurring in the actuator, based on a difference between the calculated accelerations.

This invention provides a data storage device that controls the torsional mode of a coil and reduces the power consumption of an actuator. [Solution] A voice coil motor assembly (VCMA) 400 for hard disk drives and the like includes a low-density voice coil 407 and a high-density coil reinforcement 408 positioned inside the wire coil. The low-density voice coil, utilizing copper-clad aluminum or aluminum wire, increases the second coil torsion mode frequency of the VCMA, thereby bringing it closer to the second torsion mode frequency of the actuator arm 402. In addition, the high-density reinforcement, utilizing steel, copper, or zinc, increases the mass of the VCMA with respect to the center of mass of the VCMA around the rotation axis of the VCMA, compensating for the lower-density wire. With respect to the position error signal (PES) under customer box vibration conditions, significant peaks in the PES spectrum are largely eliminated, and the power of the PES is reduced by approximately half.

A hard disk drive includes: a plurality of disk media mounted on a main shaft in which an outer diameter of each disk media is offset from an inner diameter of the disk media in the same direction along a rotation axis of the main shaft; and a load / unload ramp positioned to align correspondingly with the outer diameter of the disk media based on the offset. Thus, curvature of irregular disk media, such as curvature associated with thinner and thinner disks, is mitigated by grouping similarly characterized irregular disks together on a given principal axis and compensating for ramps accordingly.

A ramp support for a magnetic storage device includes a first ramp, having a first-ramp receiving end and a first-ramp surface, and a second ramp, having a second-ramp receiving end, offset laterally from the first-ramp receiving end, and a second-ramp surface. A first first-ramp portion faces and is angled toward a virtual plane. A second first-ramp portion faces and is angled away from the virtual plane. A third first-ramp portion faces and is angled toward the virtual plane. A first second-ramp portion faces and is angled toward the virtual plane, and a second second-ramp portion faces and is angled away from the virtual plane. In the direction along the virtual plane, the first second-ramp portion extends further than the first first-ramp portion and terminates at the same location relative to the plane as the second second-ramp portion, and the third first-ramp portion extends further than the second second-ramp portion.

A processing method of a work includes: forming flange bending parts at respective side parts of the work, the flange bending parts including first bending parts extending in a length direction of the work; holding a first part of the work in the length direction where the flange bending parts are formed between a die and a pad; and pressing a second part of the work in the length direction in a thickness direction to form a second bending part extending in a width direction of the work between the first part and the second part. The die includes a supporting surface supporting the work, a first relief part including a first inclined surface, and a second relief part including a second inclined surface.

To provide highly reliable magnetic recording media and magnetic recording / recovery devices. [Solution] A magnetic recording medium having a magnetic layer on a non-magnetic substrate, wherein the height is 0.1 nm or more and 1.5 nm or less, and the width is 1 μm or more and 15 μm or less, and the location of the defect portion having a non-periodic convex shape is specified, or there is no defect portion having a non-periodic convex shape, or the amount of non-periodic convex shape is below a reference value.

The present invention provides a method for manufacturing a magnetic head suspension that can effectively prevent contact marks from being left on the portion of the lift tab tip that engages with the ramp during the tongue orientation confirmation process, which measures the relative orientation of the tongue region with respect to the base plate. [Solution] In the method for manufacturing a magnetic head suspension according to the present invention, during the tongue posture confirmation step, the tip support member that supports the tip region of the lift tab is positioned to support at least one of the ranges of 0.45 × L from the base end of the tip region and 0.2 × L from the tip of the tip region, when the total length of the tip region is L.

To provide actuator assemblies and magnetic disk devices that prevent interference and contact, and offer improved reliability. [Solution] According to the embodiment, the actuator assembly comprises a first head suspension assembly having a suspension having a first surface and a second surface, and a piezoelectric element mounted on the suspension and joined to the suspension by a first conductive adhesive applied to the second surface, and a second head suspension assembly having a suspension having a first surface and a second surface, and a piezoelectric element mounted on the suspension and joined to the suspension by a second conductive adhesive applied to the second surface. The second surfaces of the suspensions of the first head suspension assembly and the second head suspension assembly are facing each other, and the piezoelectric elements are facing each other. The top of the first conductive adhesive is positioned offset in the direction of the suspension relative to the top of the second conductive adhesive.

According to one embodiment, a disk device includes a disk-shaped recording medium, an actuator assembly, a magnetic head supported in the actuator assembly, a first stopper which is provided contactably with the actuator assembly and defines a move of the actuator assembly in a first direction, and a first auxiliary stopper which is provided at a position where the actuator assembly comes into contact with the first auxiliary stopper after the actuator assembly comes into contact with the first stopper, and which defines the move of the actuator assembly in the first direction.

To provide a disk device suitable for appropriately controlling a floating amount of a head from a disk medium, and a control method for the disk device.SOLUTION: According to one embodiment, a disk device having a disk medium, a head, and a controller is provided. The disk medium has a recording surface. The head has a first read element and a heater. The first read element faces the recording surface. The controller detects a first noise at heating the head corresponding to a signal read from the disk medium by the first read element when power is started to be supplied to the heater.SELECTED DRAWING: Figure 1