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公开(公告)号：US20240312480A1
公开(公告)日：2024-09-19
申请号：US18461961
申请日：2023-09-06
发明人： Manabu UEHARA
CPC分类号： G11B5/012 , G11B5/02 , G11B5/105 , G11B5/483 , G11B5/4833 , G11B5/4846
摘要： According to one embodiment, a disk device includes a magnetic disk, a suspension, a magnetic head, and a carriage. The magnetic disk rotates about a first rotation axis. The suspension includes a base plate, a load beam, and a flexure. The magnetic head is attached to the flexure and configured to read and write information from and to the magnetic disk. The carriage includes an arm to which the base plate is attached. The carriage rotates about a second rotation axis to move the magnetic head with respect to the magnetic disk. The base plate includes a first surface and a second surface. The first surface faces the magnetic disk when the magnetic head is located on the magnetic disk. The second surface is opposite the first surface and faces the arm. A component different from the arm is disposed on the second surface.
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公开(公告)号：US11984142B2
公开(公告)日：2024-05-14
申请号：US17943015
申请日：2022-09-12
发明人： Kenji Ogawa
CPC分类号： G11B5/012
摘要： According to one embodiment, a magnetic disk apparatus includes a magnetic disk, a magnetic head, and a controller. The magnetic disk is provided with a track including a plurality of first sectors. The controller accesses the magnetic disk by using the magnetic head. The plurality of first sectors includes a plurality of second sectors where data segments are written and a third sector where parity and first information indicating effectiveness or ineffectiveness of protection by the parity are written.
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公开(公告)号：US11967341B1
公开(公告)日：2024-04-23
申请号：US18344472
申请日：2023-06-29
申请人： Marvell Asia Pte Ltd
发明人： Supaket Katchmart , Mats Oberg
CPC分类号： G11B20/10009 , G11B5/012
摘要： A method for cancelling, from servo signals read in a read channel while a write channel is active, interference caused by write signals in the write channel, includes generating a predicted channel response signal from the write signals in a data clock domain, resampling the generated predicted channel response signal using a clock in the data clock domain having a rate corresponding to a servo clock from a servo clock domain, transferring the resampled predicted channel response signal from the data clock domain to the servo clock domain and aligning phase of the transferred resampled predicted channel response signal with phase of the servo clock, determining a domain-boundary-crossing delay incurred in the transferring, based on the domain-boundary-crossing delay, synchronizing the phase-aligned transferred resampled predicted channel response signal with the servo signals, and subtracting the synchronized phase-aligned transferred resampled predicted channel response signal from the servo signals.
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公开(公告)号：US11948612B2
公开(公告)日：2024-04-02
申请号：US17942370
申请日：2022-09-12
摘要： A data storage device includes a data storage disc, an arm, a head, a rotary actuator, and an elevator. The disc has a read/write surface defining an x-y plane. The arm includes a load beam. The head is supported by the load beam, and the head is configured to interact with the read/write surface. The rotary actuator is configured to move a first portion of the arm about a first pivot axis in the x-y plane. The elevator is configured to move the arm in a z direction relative to a vertical surface and is configured to frictionally engage the vertical surface to hold the arm at a z direction position while allowing the rotary actuator to move the first portion of the arm about the first pivot axis. In another aspect, an apparatus includes a stack block, first and second clamp arm assemblies, and first and second piezoelectric actuators.
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公开(公告)号：US11907113B2
公开(公告)日：2024-02-20
申请号：US17817463
申请日：2022-08-04
发明人： Takeshi Shibasaki
CPC分类号： G06F12/023 , G11B5/012 , G06F2212/7201
摘要： According to one embodiment, a magnetic disk device comprises magnetic disks, heads, and a controller. The controller does not allocate logical addresses to sectors of a first area to be specified in such a manner as to correspond to a defect existing in a predetermined recording area, the first area being within the predetermined recording area constituted of a plurality of cylinders adjacent to each other in the magnetic disks, and uniquely allocates logical addresses to sectors of a second area other than the first area. The controller makes allocation of logical addresses to the sectors of the second area different from each other according to the number of defects existing in the predetermined recording area.
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公开(公告)号：US11898117B2
公开(公告)日：2024-02-13
申请号：US18105368
申请日：2023-02-03
发明人： Xingliang He , Bala Krishna Pathem
IPC分类号： C10M107/38 , G11B5/012 , C08G65/26 , G11B5/255 , G11B5/725 , C10N20/04 , C10N50/08 , G11B5/00 , C10N40/18
CPC分类号： C10M107/38 , C08G65/2612 , G11B5/012 , G11B5/255 , G11B5/7257 , C10M2213/043 , C10N2020/04 , C10N2040/18 , C10N2050/08 , G11B2005/0021
摘要： High temperature lubricants for magnetic media are provided. One such lubricant includes fluoroalkyl, fluoroalkenyl, perfluoroalkyl, or perfluoroalkyl ether segments, anchoring functional groups engageable with a protective overcoat of a magnetic recording media, and cyclic functional groups. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.
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公开(公告)号：US11875821B2
公开(公告)日：2024-01-16
申请号：US17900473
申请日：2022-08-31
发明人： Masafumi Iwashiro
摘要： A disk device includes a first controller configured to determine a first operation amount of a first actuator based on a difference between a current position and a target position of a head, a second controller configured to determine a second operation amount of a second actuator based on the difference, and a processor. The processor is configured to perform a first filtering to calculate a first filter value based on a vibration detected at multiple points in time and filter coefficients, perform a second filtering to generate a second filter value based on the vibration detected at each of the multiple points in time, and update the filter coefficients based on the second filter values and a difference between the target position and an updated position of the head.
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公开(公告)号：US20240005959A1
公开(公告)日：2024-01-04
申请号：US17853266
申请日：2022-06-29
摘要： Example control circuitry, data storage devices, and methods to provide a spiral data track format that is different from the underlying servo track format are described. The data storage device may include a storage medium configured with a plurality of tracks in at least one continuous spiral pattern and a head actuated over the storage medium. The data tracks may be written to the storage medium with track lengths that are different than a single revolution of the storage medium.
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9.发明授权公开(公告)号：US11854581B2
公开(公告)日：2023-12-26
申请号：US17860343
申请日：2022-07-08
发明人： Suping Song , Zhanjie Li , Terence T. Lam , Lijie Guan
CPC分类号： G11B5/315 , G11B5/1278 , G11B5/235 , G11B5/3116 , G11B5/3133 , G11B5/3143 , G11B5/3146 , G11B5/012 , G11B5/02 , G11B5/11 , G11B2005/0024
摘要： Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.
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10.发明授权公开(公告)号：US11790956B2
公开(公告)日：2023-10-17
申请号：US17686696
申请日：2022-03-04
发明人： Masahide Takazawa
CPC分类号： G11B33/122 , G11B5/012 , H01R13/60 , G11B5/4806
摘要： According to one embodiment, an electronic device includes a housing, a substrate, a connector, a metal member, a screw, first solder, and second solder. The substrate includes a first surface to which a second hole opens and a metal region to which a first hole opens. The region is provided on the first surface. The connector is provided with a third hole. The metal member is attached to the connector and includes a second surface to which a fourth hole opens and a joint inserted into the second hole. The screw attaches the connector and the metal member to the housing through the third hole and the fourth hole. The first solder joins the region and the second surface to each other. The second solder joins an inner surface of the second hole and the joint to each other.
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