专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

US20240153533A1 Two-Dimensional Magnetic Recording Read Head with TaOx Layer for Flat Middle Shield Topography and Method of Forming Thereof 审中-公开
公开(公告)号：US20240153533A1
公开(公告)日：2024-05-09
申请号：US18226609
申请日：2023-07-26
申请人： Western Digital Technologies, Inc.
发明人： Hongquan JIANG , Guanxiong LI , Ming MAO
IPC分类号： G11B5/39 , G11B5/11 , G11B5/31 , G11B5/596
CPC分类号： G11B5/3948 , G11B5/11 , G11B5/3163 , G11B5/3932 , G11B5/59688
摘要： The present disclosure generally relates to a dual free layer (DFL) two dimensional magnetic recording (TDMR) read head, and a method of forming thereof. The read head comprises a lower sensor, middle shields disposed on the lower sensor, and an upper sensor disposed on the middle shields. After the lower reader is formed, a dielectric layer is deposited around an outer perimeter of the lower shield. Portions of the dielectric layer are ion milled such that the remaining portions form a substantially flat layer. Another embodiment includes a deposition of a TaOx layer on the dielectric layer, where x is a numeral. Portions of the dielectric layer and the TaOx layer are then ion milled such that the remaining portions of the TaOx layer and the dielectric layer collectively form a substantially planar layer. The middle shields are formed over the lower reader and are substantially planar.

2. 发明公开

US20240096360A1 MAGNETIC DISK DEVICE AND REFERENCE PATTERN WRITING METHOD OF THE SAME 审中-公开
公开(公告)号：US20240096360A1
公开(公告)日：2024-03-21
申请号：US18182586
申请日：2023-03-13
申请人： Kabushiki Kaisha Toshiba , Toshiba Electronic Devices & Storage Corporation
发明人： Hiroshi TANI , Kazuhiko TAKAISHI
IPC分类号： G11B5/596
CPC分类号： G11B5/59688
摘要： According to one embodiment, a magnetic disk device writes a plurality of simulated reference patterns to the magnetic disk on write conditions different from each other, detects a write state of each of the simulated reference patterns, selects one of the write conditions according to detection results, and writes a plurality of regular reference patterns which become criteria for predetermined processing to be executed on the magnetic disk to the magnetic disk on the selected write condition.

3. 发明申请

US20190130936A1 MAGNETIC TAPE DEVICE AND HEAD TRACKING SERVO METHOD 审中-公开
公开(公告)号：US20190130936A1
公开(公告)日：2019-05-02
申请号：US16232165
申请日：2018-12-26
申请人： FUJIFILM Corporation
发明人： Tetsuya KANEKO , Norihito KASADA , Eiki OZAWA
IPC分类号： G11B5/39 , G11B5/55 , G11B5/596 , G11B5/592 , G11B5/008 , G11B5/66 , G11B5/70 , G11B5/584
CPC分类号： G11B5/3909 , G11B5/00826 , G11B5/5526 , G11B5/584 , G11B5/5926 , G11B5/59633 , G11B5/59688 , G11B5/66 , G11B5/70
摘要： The magnetic tape device includes: a magnetic tape; and a servo head, in which a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the servo head is a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the magnetic layer includes a servo pattern, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30.

4. 发明申请

US20180122413A1 METHOD AND APPARATUS FOR DETERMINING READ-HEAD DEVIATION USING ORTHOGONAL PREAMBLES 审中-公开
公开(公告)号：US20180122413A1
公开(公告)日：2018-05-03
申请号：US15861249
申请日：2018-01-03
申请人： Marvell World Trade Ltd.
发明人： Nitin Nangare
IPC分类号： G11B5/596 , G11B20/10 , G11B20/14 , G11B20/12
CPC分类号： G11B5/59627 , G11B5/59688 , G11B20/10009 , G11B20/10046 , G11B20/1217 , G11B20/1403 , G11B2020/1229
摘要： A storage device includes read circuitry having a read head having a detector that outputs signals representing data from a first track and an adjacent track. The read head is subject to off-track excursions during which the read head detects signals from both the first track and an adjacent track. Data on each track includes a preamble including a repeating pattern. The repeating pattern in any first track is orthogonal to the repeating pattern in any track adjacent to the first track. The read circuitry also includes respective Discrete Fourier Transform circuits to identify components in the signals corresponding to respective frequencies characteristic of the repeating pattern on the first track and the repeating pattern on the second track, and computation circuitry to determine from the components a ratio by which the read head is off-track. Corresponding methods are provided for operating such a storage device and for reading data.

5. 发明授权

US09905256B1 Magnetic disc apparatus 有权
公开(公告)号：US09905256B1
公开(公告)日：2018-02-27
申请号：US15654790
申请日：2017-07-20
申请人： Kabushiki Kaisha Toshiba
发明人： Makoto Asakura
IPC分类号： G11B5/596 , G11B5/55 , G11B20/12
CPC分类号： G11B5/5547 , G11B5/5543 , G11B5/59638 , G11B5/59655 , G11B5/59688 , G11B20/1217 , G11B20/1258 , G11B2020/1282
摘要： According to one embodiment, servo patterns different in servo pattern frequency are recorded in zones divided in a radial direction on a magnetic disc, and the servo patterns in the adjacent zones overlap each other in a predetermined area from a zone servo boundary between the zones, and a determination boundary where it is determined to execute a crossing process is set within the overlapping area of the servo patterns upstream from the zone servo boundary, based on position information on a seek destination and the present position of the magnetic head.

6. 发明授权

US09728215B2 Magnetic disk apparatus and data recording method 有权
公开(公告)号：US09728215B2
公开(公告)日：2017-08-08
申请号：US15088952
申请日：2016-04-01
申请人： Kabushiki Kaisha Toshiba
发明人： Masahiro Kanamaru , Kazuto Kashiwagi , Takeyori Hara
IPC分类号： G11B19/04 , G11B5/596 , G11B27/36 , G11B20/10 , G11B20/18 , G11B5/012 , G11B20/12
CPC分类号： G11B5/59627 , G11B5/012 , G11B5/596 , G11B5/59688 , G11B19/041 , G11B20/10009 , G11B20/10305 , G11B20/10388 , G11B20/1217 , G11B20/1889 , G11B27/36 , G11B2020/10898 , G11B2020/1238 , G11B2020/1292 , G11B2020/1869
摘要： A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a shingled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.

7. 发明申请

US20170186454A1 HEAD POSITION DETECTING METHOD AND MAGNETIC DISK DEVICE 审中-公开
公开(公告)号：US20170186454A1
公开(公告)日：2017-06-29
申请号：US15057366
申请日：2016-03-01
申请人： Kabushiki Kaisha Toshiba
发明人： Makoto Asakura , Naoki Tagami
IPC分类号： G11B5/596 , G11B20/10
CPC分类号： G11B5/59627 , G11B5/59688 , G11B20/10046
摘要： According to one embodiment, a magnetic head reads burst patterns arranged on a magnetic disk in a down-track direction such that phases in a cross-track direction are different from each other while moving over the burst patterns, a burst value is generated from the results of reading of the burst patterns by the magnetic head, and a noise component appearing in the burst value resulting from a magnetic field applied in the cross-track direction at the time of reading of the burst patterns is corrected.

8. 发明授权

US09583137B1 Methods of demodulating a servo position error signal on patterned media 有权
标题翻译：在图案化介质上解调伺服位置误差信号的方法
公开(公告)号：US09583137B1
公开(公告)日：2017-02-28
申请号：US13715980
申请日：2012-12-14
申请人： Marvell International Ltd
发明人： Zining Wu , Michael Madden
IPC分类号： G11B21/02
CPC分类号： G11B21/02 , G11B5/59655 , G11B5/59688 , G11B5/746
摘要： A system includes, in at least one aspect, a storage device including patterned media and a head; and a read channel configured to: receive a DC readback signal from the head, the DC readback signal including position error signal (PES) information associated with a position of the head with respect to the patterned media, and determine the position of the head with respect to the patterned media based on a result of summing the DC components of the PES information.
摘要翻译：在至少一个方面，系统包括包括图案化介质和头部的存储设备; 以及读通道，其被配置为：从头部接收DC回读信号，所述DC回读信号包括与头部相对于图案化介质的位置相关联的位置误差信号（PES）信息，并且确定头部的位置基于对PES信息的DC分量求和的结果，相对于图案化媒体。

9. 发明授权

US09564168B2 Adjustable interpolation sampling interval for tape systems 有权
标题翻译：磁带系统的可调内插采样间隔
公开(公告)号：US09564168B2
公开(公告)日：2017-02-07
申请号：US14681002
申请日：2015-04-07
申请人： International Business Machines Corporation
发明人： Giovanni Cherubini , Simeon Furrer , Robert A. Hutchins , Jens Jelitto
IPC分类号： G11B20/10 , G11B5/584 , G11B5/596 , G11B20/18
CPC分类号： G11B20/10231 , G11B5/00813 , G11B5/584 , G11B5/5926 , G11B5/59666 , G11B5/59688 , G11B20/10388 , G11B20/18
摘要： In one general embodiment, a method includes determining a sampling interval for an interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The method further includes applying the sampling interval to the interpolator in response to determining the sampling interval. In another general embodiment, an apparatus includes an interpolator and a controller. The controller is configured to determine a sampling interval for the interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The controller is also configured to apply the sampling interval to the interpolator in response to determining the sampling interval.
摘要翻译：在一个一般实施例中，一种方法包括使用存储在存储器中的预定义数据和位置误差信号的标准偏差中的至少一个来确定内插器的采样间隔。该方法还包括响应于确定采样间隔而将采样间隔应用于内插器。在另一个一般实施例中，一种装置包括内插器和控制器。控制器被配置为使用存储在存储器中的预定义数据和位置误差信号的标准偏差中的至少一个来确定内插器的采样间隔。控制器还被配置为响应于确定采样间隔而将采样间隔应用于内插器。

10. 发明授权

US09514774B1 Spiral pitch correction based on micro-jog variation 有权
标题翻译：基于微动差变化的螺旋音调校正
公开(公告)号：US09514774B1
公开(公告)日：2016-12-06
申请号：US14924630
申请日：2015-10-27
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Gabor Szita , Jiangang Liang , Anton Gerasimov
IPC分类号： G11B21/02 , G11B5/596 , G11B5/012 , G11B20/12
CPC分类号： G11B5/59666 , G11B5/012 , G11B5/59661 , G11B5/59672 , G11B5/59688 , G11B20/10009 , G11B2020/1281
摘要： During a self-servo write process, servo sectors that have uniform radial spacing are written on a disk surface. As part of the in-drive writing of the servo sectors, a radial offset between a reader element and a writer element of a magnetic head is measured. The measured radial offset, or micro-jog, is compared to a known nominal micro-jog value for the current radial position of the magnetic head. When the measured micro-jog value does not match the nominal micro-jog value, an appropriate correction to the self-servo write step size is applied to the radial spacing between the servo sectors being written. Variations from ideal servo spiral slope that are inherent in some servo spirals can be compensated for, thereby improving the uniformity of radial spacing of data tracks associated with the servo sectors.
摘要翻译：在自伺服写入过程中，具有均匀径向间隔的伺服扇区写在磁盘表面上。作为伺服扇区的驱动写入的一部分，测量读取器元件和磁头的写入器元件之间的径向偏移。将测量的径向偏移或微点动作与磁头的当前径向位置的已知标称微点动值进行比较。当测量的微步进值不符合标称微点动值时，对自动伺服写入步长的适当校正被应用于被写入的伺服扇区之间的径向间隔。可以补偿一些伺服螺旋固有的理想伺服螺旋斜率的变化，从而提高与伺服扇区相关的数据轨迹的径向间隔的均匀性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式